1 files changed, 775 insertions, 775 deletions

diff --git a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/ParentTooYoung.java b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/ParentTooYoung.java
index e90186e2..726ab7e4 100644
--- a/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/ParentTooYoung.java
+++ b/Tests/MODELS2020-CaseStudies/case.study.familyTree.run/src-gen/queries/ParentTooYoung.java
@@ -1,775 +1,775 @@
-/**

- * Generated from platform:/resource/case.study.familyTree.run/src/queries/familyTreeConstraints.vql

- */

-package queries;

-

-import familytree.Member;

-import java.util.Arrays;

-import java.util.Collection;

-import java.util.LinkedHashSet;

-import java.util.List;

-import java.util.Objects;

-import java.util.Optional;

-import java.util.Set;

-import java.util.function.Consumer;

-import java.util.stream.Collectors;

-import java.util.stream.Stream;

-import org.apache.log4j.Logger;

-import org.eclipse.emf.ecore.EClass;

-import org.eclipse.emf.ecore.EDataType;

-import org.eclipse.viatra.query.runtime.api.IPatternMatch;

-import org.eclipse.viatra.query.runtime.api.IQuerySpecification;

-import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;

-import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;

-import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;

-import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;

-import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;

-import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;

-import org.eclipse.viatra.query.runtime.emf.types.EDataTypeInSlotsKey;

-import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;

-import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;

-import org.eclipse.viatra.query.runtime.matchers.psystem.IExpressionEvaluator;

-import org.eclipse.viatra.query.runtime.matchers.psystem.IValueProvider;

-import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;

-import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;

-import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;

-import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExpressionEvaluation;

-import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;

-import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;

-import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;

-import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;

-import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;

-import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;

-import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;

-

-/**

- * A pattern-specific query specification that can instantiate Matcher in a type-safe way.

- * 

- * <p>Original source:

- *         <code><pre>

- *         {@literal @}Constraint(message="parentTooYoung", severity="error", key={m, p})

- *         pattern parentTooYoung(m: Member, p: Member) = {

- *              FamilyTree.members(_, m);

- *              Member.parents(m, p);

- *              Member.age(m, mAge);

- *              Member.age(p, pAge);

- *              check (mAge {@literal <}= (pAge + 12));

- *         }

- * </pre></code>

- * 

- * @see Matcher

- * @see Match

- * 

- */

-@SuppressWarnings("all")

-public final class ParentTooYoung extends BaseGeneratedEMFQuerySpecification<ParentTooYoung.Matcher> {

-  /**

-   * Pattern-specific match representation of the queries.parentTooYoung pattern,

-   * to be used in conjunction with {@link Matcher}.

-   * 

-   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.

-   * Each instance is a (possibly partial) substitution of pattern parameters,

-   * usable to represent a match of the pattern in the result of a query,

-   * or to specify the bound (fixed) input parameters when issuing a query.

-   * 

-   * @see Matcher

-   * 

-   */

-  public static abstract class Match extends BasePatternMatch {

-    private Member fM;

-    

-    private Member fP;

-    

-    private static List<String> parameterNames = makeImmutableList("m", "p");

-    

-    private Match(final Member pM, final Member pP) {

-      this.fM = pM;

-      this.fP = pP;

-    }

-    

-    @Override

-    public Object get(final String parameterName) {

-      switch(parameterName) {

-          case "m": return this.fM;

-          case "p": return this.fP;

-          default: return null;

-      }

-    }

-    

-    @Override

-    public Object get(final int index) {

-      switch(index) {

-          case 0: return this.fM;

-          case 1: return this.fP;

-          default: return null;

-      }

-    }

-    

-    public Member getM() {

-      return this.fM;

-    }

-    

-    public Member getP() {

-      return this.fP;

-    }

-    

-    @Override

-    public boolean set(final String parameterName, final Object newValue) {

-      if (!isMutable()) throw new java.lang.UnsupportedOperationException();

-      if ("m".equals(parameterName) ) {

-          this.fM = (Member) newValue;

-          return true;

-      }

-      if ("p".equals(parameterName) ) {

-          this.fP = (Member) newValue;

-          return true;

-      }

-      return false;

-    }

-    

-    public void setM(final Member pM) {

-      if (!isMutable()) throw new java.lang.UnsupportedOperationException();

-      this.fM = pM;

-    }

-    

-    public void setP(final Member pP) {

-      if (!isMutable()) throw new java.lang.UnsupportedOperationException();

-      this.fP = pP;

-    }

-    

-    @Override

-    public String patternName() {

-      return "queries.parentTooYoung";

-    }

-    

-    @Override

-    public List<String> parameterNames() {

-      return ParentTooYoung.Match.parameterNames;

-    }

-    

-    @Override

-    public Object[] toArray() {

-      return new Object[]{fM, fP};

-    }

-    

-    @Override

-    public ParentTooYoung.Match toImmutable() {

-      return isMutable() ? newMatch(fM, fP) : this;

-    }

-    

-    @Override

-    public String prettyPrint() {

-      StringBuilder result = new StringBuilder();

-      result.append("\"m\"=" + prettyPrintValue(fM) + ", ");

-      result.append("\"p\"=" + prettyPrintValue(fP));

-      return result.toString();

-    }

-    

-    @Override

-    public int hashCode() {

-      return Objects.hash(fM, fP);

-    }

-    

-    @Override

-    public boolean equals(final Object obj) {

-      if (this == obj)

-          return true;

-      if (obj == null) {

-          return false;

-      }

-      if ((obj instanceof ParentTooYoung.Match)) {

-          ParentTooYoung.Match other = (ParentTooYoung.Match) obj;

-          return Objects.equals(fM, other.fM) && Objects.equals(fP, other.fP);

-      } else {

-          // this should be infrequent

-          if (!(obj instanceof IPatternMatch)) {

-              return false;

-          }

-          IPatternMatch otherSig  = (IPatternMatch) obj;

-          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());

-      }

-    }

-    

-    @Override

-    public ParentTooYoung specification() {

-      return ParentTooYoung.instance();

-    }

-    

-    /**

-     * Returns an empty, mutable match.

-     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.

-     * 

-     * @return the empty match.

-     * 

-     */

-    public static ParentTooYoung.Match newEmptyMatch() {

-      return new Mutable(null, null);

-    }

-    

-    /**

-     * Returns a mutable (partial) match.

-     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.

-     * 

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @return the new, mutable (partial) match object.

-     * 

-     */

-    public static ParentTooYoung.Match newMutableMatch(final Member pM, final Member pP) {

-      return new Mutable(pM, pP);

-    }

-    

-    /**

-     * Returns a new (partial) match.

-     * This can be used e.g. to call the matcher with a partial match.

-     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @return the (partial) match object.

-     * 

-     */

-    public static ParentTooYoung.Match newMatch(final Member pM, final Member pP) {

-      return new Immutable(pM, pP);

-    }

-    

-    private static final class Mutable extends ParentTooYoung.Match {

-      Mutable(final Member pM, final Member pP) {

-        super(pM, pP);

-      }

-      

-      @Override

-      public boolean isMutable() {

-        return true;

-      }

-    }

-    

-    private static final class Immutable extends ParentTooYoung.Match {

-      Immutable(final Member pM, final Member pP) {

-        super(pM, pP);

-      }

-      

-      @Override

-      public boolean isMutable() {

-        return false;

-      }

-    }

-  }

-  

-  /**

-   * Generated pattern matcher API of the queries.parentTooYoung pattern,

-   * providing pattern-specific query methods.

-   * 

-   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},

-   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.

-   * 

-   * <p>Matches of the pattern will be represented as {@link Match}.

-   * 

-   * <p>Original source:

-   * <code><pre>

-   * {@literal @}Constraint(message="parentTooYoung", severity="error", key={m, p})

-   * pattern parentTooYoung(m: Member, p: Member) = {

-   *    FamilyTree.members(_, m);

-   *    Member.parents(m, p);

-   *    Member.age(m, mAge);

-   *    Member.age(p, pAge);

-   *    check (mAge {@literal <}= (pAge + 12));

-   * }

-   * </pre></code>

-   * 

-   * @see Match

-   * @see ParentTooYoung

-   * 

-   */

-  public static class Matcher extends BaseMatcher<ParentTooYoung.Match> {

-    /**

-     * Initializes the pattern matcher within an existing VIATRA Query engine.

-     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.

-     * 

-     * @param engine the existing VIATRA Query engine in which this matcher will be created.

-     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation

-     * 

-     */

-    public static ParentTooYoung.Matcher on(final ViatraQueryEngine engine) {

-      // check if matcher already exists

-      Matcher matcher = engine.getExistingMatcher(querySpecification());

-      if (matcher == null) {

-          matcher = (Matcher)engine.getMatcher(querySpecification());

-      }

-      return matcher;

-    }

-    

-    /**

-     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation

-     * @return an initialized matcher

-     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.

-     * 

-     */

-    public static ParentTooYoung.Matcher create() {

-      return new Matcher();

-    }

-    

-    private static final int POSITION_M = 0;

-    

-    private static final int POSITION_P = 1;

-    

-    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(ParentTooYoung.Matcher.class);

-    

-    /**

-     * Initializes the pattern matcher within an existing VIATRA Query engine.

-     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.

-     * 

-     * @param engine the existing VIATRA Query engine in which this matcher will be created.

-     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation

-     * 

-     */

-    private Matcher() {

-      super(querySpecification());

-    }

-    

-    /**

-     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @return matches represented as a Match object.

-     * 

-     */

-    public Collection<ParentTooYoung.Match> getAllMatches(final Member pM, final Member pP) {

-      return rawStreamAllMatches(new Object[]{pM, pP}).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @return a stream of matches represented as a Match object.

-     * 

-     */

-    public Stream<ParentTooYoung.Match> streamAllMatches(final Member pM, final Member pP) {

-      return rawStreamAllMatches(new Object[]{pM, pP});

-    }

-    

-    /**

-     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.

-     * Neither determinism nor randomness of selection is guaranteed.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @return a match represented as a Match object, or null if no match is found.

-     * 

-     */

-    public Optional<ParentTooYoung.Match> getOneArbitraryMatch(final Member pM, final Member pP) {

-      return rawGetOneArbitraryMatch(new Object[]{pM, pP});

-    }

-    

-    /**

-     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,

-     * under any possible substitution of the unspecified parameters (if any).

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @return true if the input is a valid (partial) match of the pattern.

-     * 

-     */

-    public boolean hasMatch(final Member pM, final Member pP) {

-      return rawHasMatch(new Object[]{pM, pP});

-    }

-    

-    /**

-     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @return the number of pattern matches found.

-     * 

-     */

-    public int countMatches(final Member pM, final Member pP) {

-      return rawCountMatches(new Object[]{pM, pP});

-    }

-    

-    /**

-     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.

-     * Neither determinism nor randomness of selection is guaranteed.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @param processor the action that will process the selected match.

-     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked

-     * 

-     */

-    public boolean forOneArbitraryMatch(final Member pM, final Member pP, final Consumer<? super ParentTooYoung.Match> processor) {

-      return rawForOneArbitraryMatch(new Object[]{pM, pP}, processor);

-    }

-    

-    /**

-     * Returns a new (partial) match.

-     * This can be used e.g. to call the matcher with a partial match.

-     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.

-     * @param pM the fixed value of pattern parameter m, or null if not bound.

-     * @param pP the fixed value of pattern parameter p, or null if not bound.

-     * @return the (partial) match object.

-     * 

-     */

-    public ParentTooYoung.Match newMatch(final Member pM, final Member pP) {

-      return ParentTooYoung.Match.newMatch(pM, pP);

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    protected Stream<Member> rawStreamAllValuesOfm(final Object[] parameters) {

-      return rawStreamAllValues(POSITION_M, parameters).map(Member.class::cast);

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfm() {

-      return rawStreamAllValuesOfm(emptyArray()).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfm() {

-      return rawStreamAllValuesOfm(emptyArray());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     *      

-     * @return the Stream of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfm(final ParentTooYoung.Match partialMatch) {

-      return rawStreamAllValuesOfm(partialMatch.toArray());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     *      

-     * @return the Stream of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfm(final Member pP) {

-      return rawStreamAllValuesOfm(new Object[]{null, pP});

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfm(final ParentTooYoung.Match partialMatch) {

-      return rawStreamAllValuesOfm(partialMatch.toArray()).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for m.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfm(final Member pP) {

-      return rawStreamAllValuesOfm(new Object[]{null, pP}).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for p.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    protected Stream<Member> rawStreamAllValuesOfp(final Object[] parameters) {

-      return rawStreamAllValues(POSITION_P, parameters).map(Member.class::cast);

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for p.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfp() {

-      return rawStreamAllValuesOfp(emptyArray()).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for p.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfp() {

-      return rawStreamAllValuesOfp(emptyArray());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for p.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     *      

-     * @return the Stream of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfp(final ParentTooYoung.Match partialMatch) {

-      return rawStreamAllValuesOfp(partialMatch.toArray());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for p.

-     * </p>

-     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.

-     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.

-     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.

-     *      

-     * @return the Stream of all values or empty set if there are no matches

-     * 

-     */

-    public Stream<Member> streamAllValuesOfp(final Member pM) {

-      return rawStreamAllValuesOfp(new Object[]{pM, null});

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for p.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfp(final ParentTooYoung.Match partialMatch) {

-      return rawStreamAllValuesOfp(partialMatch.toArray()).collect(Collectors.toSet());

-    }

-    

-    /**

-     * Retrieve the set of values that occur in matches for p.

-     * @return the Set of all values or empty set if there are no matches

-     * 

-     */

-    public Set<Member> getAllValuesOfp(final Member pM) {

-      return rawStreamAllValuesOfp(new Object[]{pM, null}).collect(Collectors.toSet());

-    }

-    

-    @Override

-    protected ParentTooYoung.Match tupleToMatch(final Tuple t) {

-      try {

-          return ParentTooYoung.Match.newMatch((Member) t.get(POSITION_M), (Member) t.get(POSITION_P));

-      } catch(ClassCastException e) {

-          LOGGER.error("Element(s) in tuple not properly typed!",e);

-          return null;

-      }

-    }

-    

-    @Override

-    protected ParentTooYoung.Match arrayToMatch(final Object[] match) {

-      try {

-          return ParentTooYoung.Match.newMatch((Member) match[POSITION_M], (Member) match[POSITION_P]);

-      } catch(ClassCastException e) {

-          LOGGER.error("Element(s) in array not properly typed!",e);

-          return null;

-      }

-    }

-    

-    @Override

-    protected ParentTooYoung.Match arrayToMatchMutable(final Object[] match) {

-      try {

-          return ParentTooYoung.Match.newMutableMatch((Member) match[POSITION_M], (Member) match[POSITION_P]);

-      } catch(ClassCastException e) {

-          LOGGER.error("Element(s) in array not properly typed!",e);

-          return null;

-      }

-    }

-    

-    /**

-     * @return the singleton instance of the query specification of this pattern

-     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded

-     * 

-     */

-    public static IQuerySpecification<ParentTooYoung.Matcher> querySpecification() {

-      return ParentTooYoung.instance();

-    }

-  }

-  

-  private ParentTooYoung() {

-    super(GeneratedPQuery.INSTANCE);

-  }

-  

-  /**

-   * @return the singleton instance of the query specification

-   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded

-   * 

-   */

-  public static ParentTooYoung instance() {

-    try{

-        return LazyHolder.INSTANCE;

-    } catch (ExceptionInInitializerError err) {

-        throw processInitializerError(err);

-    }

-  }

-  

-  @Override

-  protected ParentTooYoung.Matcher instantiate(final ViatraQueryEngine engine) {

-    return ParentTooYoung.Matcher.on(engine);

-  }

-  

-  @Override

-  public ParentTooYoung.Matcher instantiate() {

-    return ParentTooYoung.Matcher.create();

-  }

-  

-  @Override

-  public ParentTooYoung.Match newEmptyMatch() {

-    return ParentTooYoung.Match.newEmptyMatch();

-  }

-  

-  @Override

-  public ParentTooYoung.Match newMatch(final Object... parameters) {

-    return ParentTooYoung.Match.newMatch((familytree.Member) parameters[0], (familytree.Member) parameters[1]);

-  }

-  

-  /**

-   * Inner class allowing the singleton instance of {@link ParentTooYoung} to be created 

-   *     <b>not</b> at the class load time of the outer class, 

-   *     but rather at the first call to {@link ParentTooYoung#instance()}.

-   * 

-   * <p> This workaround is required e.g. to support recursion.

-   * 

-   */

-  private static class LazyHolder {

-    private static final ParentTooYoung INSTANCE = new ParentTooYoung();

-    

-    /**

-     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.

-     * This initialization order is required to support indirect recursion.

-     * 

-     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.

-     * 

-     */

-    private static final Object STATIC_INITIALIZER = ensureInitialized();

-    

-    public static Object ensureInitialized() {

-      INSTANCE.ensureInitializedInternal();

-      return null;

-    }

-  }

-  

-  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {

-    private static final ParentTooYoung.GeneratedPQuery INSTANCE = new GeneratedPQuery();

-    

-    private final PParameter parameter_m = new PParameter("m", "familytree.Member", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.example.org/familytree", "Member")), PParameterDirection.INOUT);

-    

-    private final PParameter parameter_p = new PParameter("p", "familytree.Member", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.example.org/familytree", "Member")), PParameterDirection.INOUT);

-    

-    private final List<PParameter> parameters = Arrays.asList(parameter_m, parameter_p);

-    

-    private GeneratedPQuery() {

-      super(PVisibility.PUBLIC);

-    }

-    

-    @Override

-    public String getFullyQualifiedName() {

-      return "queries.parentTooYoung";

-    }

-    

-    @Override

-    public List<String> getParameterNames() {

-      return Arrays.asList("m","p");

-    }

-    

-    @Override

-    public List<PParameter> getParameters() {

-      return parameters;

-    }

-    

-    @Override

-    public Set<PBody> doGetContainedBodies() {

-      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));

-      Set<PBody> bodies = new LinkedHashSet<>();

-      {

-          PBody body = new PBody(this);

-          PVariable var_m = body.getOrCreateVariableByName("m");

-          PVariable var_p = body.getOrCreateVariableByName("p");

-          PVariable var___0_ = body.getOrCreateVariableByName("_<0>");

-          PVariable var_mAge = body.getOrCreateVariableByName("mAge");

-          PVariable var_pAge = body.getOrCreateVariableByName("pAge");

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          new TypeConstraint(body, Tuples.flatTupleOf(var_p), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(

-             new ExportedParameter(body, var_m, parameter_m),

-             new ExportedParameter(body, var_p, parameter_p)

-          ));

-          //    FamilyTree.members(_, m)

-          new TypeConstraint(body, Tuples.flatTupleOf(var___0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "FamilyTree")));

-          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");

-          new TypeConstraint(body, Tuples.flatTupleOf(var___0_, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "FamilyTree", "members")));

-          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          new Equality(body, var__virtual_0_, var_m);

-          //    Member.parents(m, p)

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          PVariable var__virtual_1_ = body.getOrCreateVariableByName(".virtual{1}");

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m, var__virtual_1_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "Member", "parents")));

-          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_1_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          new Equality(body, var__virtual_1_, var_p);

-          //    Member.age(m, mAge)

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          PVariable var__virtual_2_ = body.getOrCreateVariableByName(".virtual{2}");

-          new TypeConstraint(body, Tuples.flatTupleOf(var_m, var__virtual_2_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "Member", "age")));

-          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_2_), new EDataTypeInSlotsKey((EDataType)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EInt")));

-          new Equality(body, var__virtual_2_, var_mAge);

-          //    Member.age(p, pAge)

-          new TypeConstraint(body, Tuples.flatTupleOf(var_p), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));

-          PVariable var__virtual_3_ = body.getOrCreateVariableByName(".virtual{3}");

-          new TypeConstraint(body, Tuples.flatTupleOf(var_p, var__virtual_3_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "Member", "age")));

-          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_3_), new EDataTypeInSlotsKey((EDataType)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EInt")));

-          new Equality(body, var__virtual_3_, var_pAge);

-          //    check (mAge <= (pAge + 12))

-          new ExpressionEvaluation(body, new IExpressionEvaluator() {

-          

-              @Override

-              public String getShortDescription() {

-                  return "Expression evaluation from pattern parentTooYoung";

-              }

-              

-              @Override

-              public Iterable<String> getInputParameterNames() {

-                  return Arrays.asList("mAge", "pAge");}

-          

-              @Override

-              public Object evaluateExpression(IValueProvider provider) throws Exception {

-                  Integer mAge = (Integer) provider.getValue("mAge");

-                  Integer pAge = (Integer) provider.getValue("pAge");

-                  return evaluateExpression_1_1(mAge, pAge);

-              }

-          },  null); 

-          bodies.add(body);

-      }

-      {

-          PAnnotation annotation = new PAnnotation("Constraint");

-          annotation.addAttribute("message", "parentTooYoung");

-          annotation.addAttribute("severity", "error");

-          annotation.addAttribute("key", Arrays.asList(new Object[] {

-                              new ParameterReference("m"), 

-                              new ParameterReference("p")

-                              }));

-          addAnnotation(annotation);

-      }

-      return bodies;

-    }

-  }

-  

-  private static boolean evaluateExpression_1_1(final Integer mAge, final Integer pAge) {

-    return ((mAge).intValue() <= ((pAge).intValue() + 12));

-  }

-}

+/**
+ * Generated from platform:/resource/case.study.familyTree.run/src/queries/familyTreeConstraints.vql
+ */
+package queries;
+
+import familytree.Member;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import org.apache.log4j.Logger;
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.emf.ecore.EDataType;
+import org.eclipse.viatra.query.runtime.api.IPatternMatch;
+import org.eclipse.viatra.query.runtime.api.IQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFPQuery;
+import org.eclipse.viatra.query.runtime.api.impl.BaseGeneratedEMFQuerySpecification;
+import org.eclipse.viatra.query.runtime.api.impl.BaseMatcher;
+import org.eclipse.viatra.query.runtime.api.impl.BasePatternMatch;
+import org.eclipse.viatra.query.runtime.emf.types.EClassTransitiveInstancesKey;
+import org.eclipse.viatra.query.runtime.emf.types.EDataTypeInSlotsKey;
+import org.eclipse.viatra.query.runtime.emf.types.EStructuralFeatureInstancesKey;
+import org.eclipse.viatra.query.runtime.matchers.backend.QueryEvaluationHint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.IExpressionEvaluator;
+import org.eclipse.viatra.query.runtime.matchers.psystem.IValueProvider;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PBody;
+import org.eclipse.viatra.query.runtime.matchers.psystem.PVariable;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.PAnnotation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.annotations.ParameterReference;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Equality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.ExpressionEvaluation;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.TypeConstraint;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameterDirection;
+import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuple;
+import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
+import org.eclipse.viatra.query.runtime.util.ViatraQueryLoggingUtil;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(message="parentTooYoung", severity="error", key={m, p})
+ *         pattern parentTooYoung(m: Member, p: Member) = {
+ *              FamilyTree.members(_, m);
+ *              Member.parents(m, p);
+ *              Member.age(m, mAge);
+ *              Member.age(p, pAge);
+ *              check (mAge {@literal <}= (pAge + 12));
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class ParentTooYoung extends BaseGeneratedEMFQuerySpecification<ParentTooYoung.Matcher> {
+  /**
+   * Pattern-specific match representation of the queries.parentTooYoung pattern,
+   * to be used in conjunction with {@link Matcher}.
+   * 
+   * <p>Class fields correspond to parameters of the pattern. Fields with value null are considered unassigned.
+   * Each instance is a (possibly partial) substitution of pattern parameters,
+   * usable to represent a match of the pattern in the result of a query,
+   * or to specify the bound (fixed) input parameters when issuing a query.
+   * 
+   * @see Matcher
+   * 
+   */
+  public static abstract class Match extends BasePatternMatch {
+    private Member fM;
+    
+    private Member fP;
+    
+    private static List<String> parameterNames = makeImmutableList("m", "p");
+    
+    private Match(final Member pM, final Member pP) {
+      this.fM = pM;
+      this.fP = pP;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "m": return this.fM;
+          case "p": return this.fP;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fM;
+          case 1: return this.fP;
+          default: return null;
+      }
+    }
+    
+    public Member getM() {
+      return this.fM;
+    }
+    
+    public Member getP() {
+      return this.fP;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("m".equals(parameterName) ) {
+          this.fM = (Member) newValue;
+          return true;
+      }
+      if ("p".equals(parameterName) ) {
+          this.fP = (Member) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setM(final Member pM) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fM = pM;
+    }
+    
+    public void setP(final Member pP) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fP = pP;
+    }
+    
+    @Override
+    public String patternName() {
+      return "queries.parentTooYoung";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return ParentTooYoung.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fM, fP};
+    }
+    
+    @Override
+    public ParentTooYoung.Match toImmutable() {
+      return isMutable() ? newMatch(fM, fP) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"m\"=" + prettyPrintValue(fM) + ", ");
+      result.append("\"p\"=" + prettyPrintValue(fP));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fM, fP);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof ParentTooYoung.Match)) {
+          ParentTooYoung.Match other = (ParentTooYoung.Match) obj;
+          return Objects.equals(fM, other.fM) && Objects.equals(fP, other.fP);
+      } else {
+          // this should be infrequent
+          if (!(obj instanceof IPatternMatch)) {
+              return false;
+          }
+          IPatternMatch otherSig  = (IPatternMatch) obj;
+          return Objects.equals(specification(), otherSig.specification()) && Arrays.deepEquals(toArray(), otherSig.toArray());
+      }
+    }
+    
+    @Override
+    public ParentTooYoung specification() {
+      return ParentTooYoung.instance();
+    }
+    
+    /**
+     * Returns an empty, mutable match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @return the empty match.
+     * 
+     */
+    public static ParentTooYoung.Match newEmptyMatch() {
+      return new Mutable(null, null);
+    }
+    
+    /**
+     * Returns a mutable (partial) match.
+     * Fields of the mutable match can be filled to create a partial match, usable as matcher input.
+     * 
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static ParentTooYoung.Match newMutableMatch(final Member pM, final Member pP) {
+      return new Mutable(pM, pP);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static ParentTooYoung.Match newMatch(final Member pM, final Member pP) {
+      return new Immutable(pM, pP);
+    }
+    
+    private static final class Mutable extends ParentTooYoung.Match {
+      Mutable(final Member pM, final Member pP) {
+        super(pM, pP);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends ParentTooYoung.Match {
+      Immutable(final Member pM, final Member pP) {
+        super(pM, pP);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the queries.parentTooYoung pattern,
+   * providing pattern-specific query methods.
+   * 
+   * <p>Use the pattern matcher on a given model via {@link #on(ViatraQueryEngine)},
+   * e.g. in conjunction with {@link ViatraQueryEngine#on(QueryScope)}.
+   * 
+   * <p>Matches of the pattern will be represented as {@link Match}.
+   * 
+   * <p>Original source:
+   * <code><pre>
+   * {@literal @}Constraint(message="parentTooYoung", severity="error", key={m, p})
+   * pattern parentTooYoung(m: Member, p: Member) = {
+   *    FamilyTree.members(_, m);
+   *    Member.parents(m, p);
+   *    Member.age(m, mAge);
+   *    Member.age(p, pAge);
+   *    check (mAge {@literal <}= (pAge + 12));
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see ParentTooYoung
+   * 
+   */
+  public static class Matcher extends BaseMatcher<ParentTooYoung.Match> {
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    public static ParentTooYoung.Matcher on(final ViatraQueryEngine engine) {
+      // check if matcher already exists
+      Matcher matcher = engine.getExistingMatcher(querySpecification());
+      if (matcher == null) {
+          matcher = (Matcher)engine.getMatcher(querySpecification());
+      }
+      return matcher;
+    }
+    
+    /**
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * @return an initialized matcher
+     * @noreference This method is for internal matcher initialization by the framework, do not call it manually.
+     * 
+     */
+    public static ParentTooYoung.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_M = 0;
+    
+    private static final int POSITION_P = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(ParentTooYoung.Matcher.class);
+    
+    /**
+     * Initializes the pattern matcher within an existing VIATRA Query engine.
+     * If the pattern matcher is already constructed in the engine, only a light-weight reference is returned.
+     * 
+     * @param engine the existing VIATRA Query engine in which this matcher will be created.
+     * @throws ViatraQueryRuntimeException if an error occurs during pattern matcher creation
+     * 
+     */
+    private Matcher() {
+      super(querySpecification());
+    }
+    
+    /**
+     * Returns the set of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<ParentTooYoung.Match> getAllMatches(final Member pM, final Member pP) {
+      return rawStreamAllMatches(new Object[]{pM, pP}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Returns a stream of all matches of the pattern that conform to the given fixed values of some parameters.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<ParentTooYoung.Match> streamAllMatches(final Member pM, final Member pP) {
+      return rawStreamAllMatches(new Object[]{pM, pP});
+    }
+    
+    /**
+     * Returns an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<ParentTooYoung.Match> getOneArbitraryMatch(final Member pM, final Member pP) {
+      return rawGetOneArbitraryMatch(new Object[]{pM, pP});
+    }
+    
+    /**
+     * Indicates whether the given combination of specified pattern parameters constitute a valid pattern match,
+     * under any possible substitution of the unspecified parameters (if any).
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Member pM, final Member pP) {
+      return rawHasMatch(new Object[]{pM, pP});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Member pM, final Member pP) {
+      return rawCountMatches(new Object[]{pM, pP});
+    }
+    
+    /**
+     * Executes the given processor on an arbitrarily chosen match of the pattern that conforms to the given fixed values of some parameters.
+     * Neither determinism nor randomness of selection is guaranteed.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @param processor the action that will process the selected match.
+     * @return true if the pattern has at least one match with the given parameter values, false if the processor was not invoked
+     * 
+     */
+    public boolean forOneArbitraryMatch(final Member pM, final Member pP, final Consumer<? super ParentTooYoung.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pM, pP}, processor);
+    }
+    
+    /**
+     * Returns a new (partial) match.
+     * This can be used e.g. to call the matcher with a partial match.
+     * <p>The returned match will be immutable. Use {@link #newEmptyMatch()} to obtain a mutable match object.
+     * @param pM the fixed value of pattern parameter m, or null if not bound.
+     * @param pP the fixed value of pattern parameter p, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public ParentTooYoung.Match newMatch(final Member pM, final Member pP) {
+      return ParentTooYoung.Match.newMatch(pM, pP);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Member> rawStreamAllValuesOfm(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_M, parameters).map(Member.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfm() {
+      return rawStreamAllValuesOfm(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfm() {
+      return rawStreamAllValuesOfm(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfm(final ParentTooYoung.Match partialMatch) {
+      return rawStreamAllValuesOfm(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfm(final Member pP) {
+      return rawStreamAllValuesOfm(new Object[]{null, pP});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfm(final ParentTooYoung.Match partialMatch) {
+      return rawStreamAllValuesOfm(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for m.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfm(final Member pP) {
+      return rawStreamAllValuesOfm(new Object[]{null, pP}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for p.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Member> rawStreamAllValuesOfp(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_P, parameters).map(Member.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for p.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfp() {
+      return rawStreamAllValuesOfp(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for p.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfp() {
+      return rawStreamAllValuesOfp(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for p.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfp(final ParentTooYoung.Match partialMatch) {
+      return rawStreamAllValuesOfp(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for p.
+     * </p>
+     * <strong>NOTE</strong>: It is important not to modify the source model while the stream is being processed.
+     * If the match set of the pattern changes during processing, the contents of the stream is <strong>undefined</strong>.
+     * In such cases, either rely on {@link #getAllMatches()} or collect the results of the stream in end-user code.
+     *      
+     * @return the Stream of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Member> streamAllValuesOfp(final Member pM) {
+      return rawStreamAllValuesOfp(new Object[]{pM, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for p.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfp(final ParentTooYoung.Match partialMatch) {
+      return rawStreamAllValuesOfp(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for p.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Member> getAllValuesOfp(final Member pM) {
+      return rawStreamAllValuesOfp(new Object[]{pM, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected ParentTooYoung.Match tupleToMatch(final Tuple t) {
+      try {
+          return ParentTooYoung.Match.newMatch((Member) t.get(POSITION_M), (Member) t.get(POSITION_P));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected ParentTooYoung.Match arrayToMatch(final Object[] match) {
+      try {
+          return ParentTooYoung.Match.newMatch((Member) match[POSITION_M], (Member) match[POSITION_P]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected ParentTooYoung.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return ParentTooYoung.Match.newMutableMatch((Member) match[POSITION_M], (Member) match[POSITION_P]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    /**
+     * @return the singleton instance of the query specification of this pattern
+     * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+     * 
+     */
+    public static IQuerySpecification<ParentTooYoung.Matcher> querySpecification() {
+      return ParentTooYoung.instance();
+    }
+  }
+  
+  private ParentTooYoung() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static ParentTooYoung instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected ParentTooYoung.Matcher instantiate(final ViatraQueryEngine engine) {
+    return ParentTooYoung.Matcher.on(engine);
+  }
+  
+  @Override
+  public ParentTooYoung.Matcher instantiate() {
+    return ParentTooYoung.Matcher.create();
+  }
+  
+  @Override
+  public ParentTooYoung.Match newEmptyMatch() {
+    return ParentTooYoung.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public ParentTooYoung.Match newMatch(final Object... parameters) {
+    return ParentTooYoung.Match.newMatch((familytree.Member) parameters[0], (familytree.Member) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link ParentTooYoung} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link ParentTooYoung#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final ParentTooYoung INSTANCE = new ParentTooYoung();
+    
+    /**
+     * Statically initializes the query specification <b>after</b> the field {@link #INSTANCE} is assigned.
+     * This initialization order is required to support indirect recursion.
+     * 
+     * <p> The static initializer is defined using a helper field to work around limitations of the code generator.
+     * 
+     */
+    private static final Object STATIC_INITIALIZER = ensureInitialized();
+    
+    public static Object ensureInitialized() {
+      INSTANCE.ensureInitializedInternal();
+      return null;
+    }
+  }
+  
+  private static class GeneratedPQuery extends BaseGeneratedEMFPQuery {
+    private static final ParentTooYoung.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_m = new PParameter("m", "familytree.Member", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.example.org/familytree", "Member")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_p = new PParameter("p", "familytree.Member", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("http://www.example.org/familytree", "Member")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_m, parameter_p);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "queries.parentTooYoung";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("m","p");
+    }
+    
+    @Override
+    public List<PParameter> getParameters() {
+      return parameters;
+    }
+    
+    @Override
+    public Set<PBody> doGetContainedBodies() {
+      setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
+      Set<PBody> bodies = new LinkedHashSet<>();
+      {
+          PBody body = new PBody(this);
+          PVariable var_m = body.getOrCreateVariableByName("m");
+          PVariable var_p = body.getOrCreateVariableByName("p");
+          PVariable var___0_ = body.getOrCreateVariableByName("_<0>");
+          PVariable var_mAge = body.getOrCreateVariableByName("mAge");
+          PVariable var_pAge = body.getOrCreateVariableByName("pAge");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_p), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_m, parameter_m),
+             new ExportedParameter(body, var_p, parameter_p)
+          ));
+          //    FamilyTree.members(_, m)
+          new TypeConstraint(body, Tuples.flatTupleOf(var___0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "FamilyTree")));
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var___0_, var__virtual_0_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "FamilyTree", "members")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_0_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          new Equality(body, var__virtual_0_, var_m);
+          //    Member.parents(m, p)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          PVariable var__virtual_1_ = body.getOrCreateVariableByName(".virtual{1}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m, var__virtual_1_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "Member", "parents")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_1_), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          new Equality(body, var__virtual_1_, var_p);
+          //    Member.age(m, mAge)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          PVariable var__virtual_2_ = body.getOrCreateVariableByName(".virtual{2}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_m, var__virtual_2_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "Member", "age")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_2_), new EDataTypeInSlotsKey((EDataType)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EInt")));
+          new Equality(body, var__virtual_2_, var_mAge);
+          //    Member.age(p, pAge)
+          new TypeConstraint(body, Tuples.flatTupleOf(var_p), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("http://www.example.org/familytree", "Member")));
+          PVariable var__virtual_3_ = body.getOrCreateVariableByName(".virtual{3}");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_p, var__virtual_3_), new EStructuralFeatureInstancesKey(getFeatureLiteral("http://www.example.org/familytree", "Member", "age")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var__virtual_3_), new EDataTypeInSlotsKey((EDataType)getClassifierLiteral("http://www.eclipse.org/emf/2002/Ecore", "EInt")));
+          new Equality(body, var__virtual_3_, var_pAge);
+          //    check (mAge <= (pAge + 12))
+          new ExpressionEvaluation(body, new IExpressionEvaluator() {
+          
+              @Override
+              public String getShortDescription() {
+                  return "Expression evaluation from pattern parentTooYoung";
+              }
+              
+              @Override
+              public Iterable<String> getInputParameterNames() {
+                  return Arrays.asList("mAge", "pAge");}
+          
+              @Override
+              public Object evaluateExpression(IValueProvider provider) throws Exception {
+                  Integer mAge = (Integer) provider.getValue("mAge");
+                  Integer pAge = (Integer) provider.getValue("pAge");
+                  return evaluateExpression_1_1(mAge, pAge);
+              }
+          },  null); 
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("message", "parentTooYoung");
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("m"), 
+                              new ParameterReference("p")
+                              }));
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+  
+  private static boolean evaluateExpression_1_1(final Integer mAge, final Integer pAge) {
+    return ((mAge).intValue() <= ((pAge).intValue() + 12));
+  }
+}