1 files changed, 738 insertions, 0 deletions

diff --git a/Domains/github-graph/src-gen/queries/ConsecutiveUnSubWithoutSub.java b/Domains/github-graph/src-gen/queries/ConsecutiveUnSubWithoutSub.java
new file mode 100644
index 00000000..492e2c76
--- /dev/null
+++ b/Domains/github-graph/src-gen/queries/ConsecutiveUnSubWithoutSub.java
@@ -0,0 +1,738 @@
+/**
+ * Generated from platform:/resource/github-graph/queries/queries/github.vql
+ */
+package queries;
+
+import github.Issue;
+import github.User;
+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.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.matchers.backend.QueryEvaluationHint;
+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.ExportedParameter;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.Inequality;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicdeferred.NegativePatternCall;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.ConstantValue;
+import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.PositivePatternCall;
+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;
+import queries.CheckUserAction;
+import queries.IsSubscribe;
+
+/**
+ * A pattern-specific query specification that can instantiate Matcher in a type-safe way.
+ * 
+ * <p>Original source:
+ *         <code><pre>
+ *         {@literal @}Constraint(key={i, u}, severity="error", message="error")
+ *         pattern consecutiveUnSubWithoutSub(i: Issue, u: User) {
+ *              find checkUserAction(i, u, a1, Action::UNSUBSCRIBED);
+ *              find checkUserAction(i, u, a2, Action::UNSUBSCRIBED);
+ *              a1 != a2;
+ *              neg find isSubscribe(i, u, _);
+ *         }
+ * </pre></code>
+ * 
+ * @see Matcher
+ * @see Match
+ * 
+ */
+@SuppressWarnings("all")
+public final class ConsecutiveUnSubWithoutSub extends BaseGeneratedEMFQuerySpecification<ConsecutiveUnSubWithoutSub.Matcher> {
+  /**
+   * Pattern-specific match representation of the queries.consecutiveUnSubWithoutSub 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 Issue fI;
+    
+    private User fU;
+    
+    private static List<String> parameterNames = makeImmutableList("i", "u");
+    
+    private Match(final Issue pI, final User pU) {
+      this.fI = pI;
+      this.fU = pU;
+    }
+    
+    @Override
+    public Object get(final String parameterName) {
+      switch(parameterName) {
+          case "i": return this.fI;
+          case "u": return this.fU;
+          default: return null;
+      }
+    }
+    
+    @Override
+    public Object get(final int index) {
+      switch(index) {
+          case 0: return this.fI;
+          case 1: return this.fU;
+          default: return null;
+      }
+    }
+    
+    public Issue getI() {
+      return this.fI;
+    }
+    
+    public User getU() {
+      return this.fU;
+    }
+    
+    @Override
+    public boolean set(final String parameterName, final Object newValue) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      if ("i".equals(parameterName) ) {
+          this.fI = (Issue) newValue;
+          return true;
+      }
+      if ("u".equals(parameterName) ) {
+          this.fU = (User) newValue;
+          return true;
+      }
+      return false;
+    }
+    
+    public void setI(final Issue pI) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fI = pI;
+    }
+    
+    public void setU(final User pU) {
+      if (!isMutable()) throw new java.lang.UnsupportedOperationException();
+      this.fU = pU;
+    }
+    
+    @Override
+    public String patternName() {
+      return "queries.consecutiveUnSubWithoutSub";
+    }
+    
+    @Override
+    public List<String> parameterNames() {
+      return ConsecutiveUnSubWithoutSub.Match.parameterNames;
+    }
+    
+    @Override
+    public Object[] toArray() {
+      return new Object[]{fI, fU};
+    }
+    
+    @Override
+    public ConsecutiveUnSubWithoutSub.Match toImmutable() {
+      return isMutable() ? newMatch(fI, fU) : this;
+    }
+    
+    @Override
+    public String prettyPrint() {
+      StringBuilder result = new StringBuilder();
+      result.append("\"i\"=" + prettyPrintValue(fI) + ", ");
+      result.append("\"u\"=" + prettyPrintValue(fU));
+      return result.toString();
+    }
+    
+    @Override
+    public int hashCode() {
+      return Objects.hash(fI, fU);
+    }
+    
+    @Override
+    public boolean equals(final Object obj) {
+      if (this == obj)
+          return true;
+      if (obj == null) {
+          return false;
+      }
+      if ((obj instanceof ConsecutiveUnSubWithoutSub.Match)) {
+          ConsecutiveUnSubWithoutSub.Match other = (ConsecutiveUnSubWithoutSub.Match) obj;
+          return Objects.equals(fI, other.fI) && Objects.equals(fU, other.fU);
+      } 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 ConsecutiveUnSubWithoutSub specification() {
+      return ConsecutiveUnSubWithoutSub.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 ConsecutiveUnSubWithoutSub.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 pI the fixed value of pattern parameter i, or null if not bound.
+     * @param pU the fixed value of pattern parameter u, or null if not bound.
+     * @return the new, mutable (partial) match object.
+     * 
+     */
+    public static ConsecutiveUnSubWithoutSub.Match newMutableMatch(final Issue pI, final User pU) {
+      return new Mutable(pI, pU);
+    }
+    
+    /**
+     * 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 pI the fixed value of pattern parameter i, or null if not bound.
+     * @param pU the fixed value of pattern parameter u, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public static ConsecutiveUnSubWithoutSub.Match newMatch(final Issue pI, final User pU) {
+      return new Immutable(pI, pU);
+    }
+    
+    private static final class Mutable extends ConsecutiveUnSubWithoutSub.Match {
+      Mutable(final Issue pI, final User pU) {
+        super(pI, pU);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return true;
+      }
+    }
+    
+    private static final class Immutable extends ConsecutiveUnSubWithoutSub.Match {
+      Immutable(final Issue pI, final User pU) {
+        super(pI, pU);
+      }
+      
+      @Override
+      public boolean isMutable() {
+        return false;
+      }
+    }
+  }
+  
+  /**
+   * Generated pattern matcher API of the queries.consecutiveUnSubWithoutSub 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(key={i, u}, severity="error", message="error")
+   * pattern consecutiveUnSubWithoutSub(i: Issue, u: User) {
+   *    find checkUserAction(i, u, a1, Action::UNSUBSCRIBED);
+   *    find checkUserAction(i, u, a2, Action::UNSUBSCRIBED);
+   *    a1 != a2;
+   *    neg find isSubscribe(i, u, _);
+   * }
+   * </pre></code>
+   * 
+   * @see Match
+   * @see ConsecutiveUnSubWithoutSub
+   * 
+   */
+  public static class Matcher extends BaseMatcher<ConsecutiveUnSubWithoutSub.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 ConsecutiveUnSubWithoutSub.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 ConsecutiveUnSubWithoutSub.Matcher create() {
+      return new Matcher();
+    }
+    
+    private static final int POSITION_I = 0;
+    
+    private static final int POSITION_U = 1;
+    
+    private static final Logger LOGGER = ViatraQueryLoggingUtil.getLogger(ConsecutiveUnSubWithoutSub.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 pI the fixed value of pattern parameter i, or null if not bound.
+     * @param pU the fixed value of pattern parameter u, or null if not bound.
+     * @return matches represented as a Match object.
+     * 
+     */
+    public Collection<ConsecutiveUnSubWithoutSub.Match> getAllMatches(final Issue pI, final User pU) {
+      return rawStreamAllMatches(new Object[]{pI, pU}).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 pI the fixed value of pattern parameter i, or null if not bound.
+     * @param pU the fixed value of pattern parameter u, or null if not bound.
+     * @return a stream of matches represented as a Match object.
+     * 
+     */
+    public Stream<ConsecutiveUnSubWithoutSub.Match> streamAllMatches(final Issue pI, final User pU) {
+      return rawStreamAllMatches(new Object[]{pI, pU});
+    }
+    
+    /**
+     * 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 pI the fixed value of pattern parameter i, or null if not bound.
+     * @param pU the fixed value of pattern parameter u, or null if not bound.
+     * @return a match represented as a Match object, or null if no match is found.
+     * 
+     */
+    public Optional<ConsecutiveUnSubWithoutSub.Match> getOneArbitraryMatch(final Issue pI, final User pU) {
+      return rawGetOneArbitraryMatch(new Object[]{pI, pU});
+    }
+    
+    /**
+     * 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 pI the fixed value of pattern parameter i, or null if not bound.
+     * @param pU the fixed value of pattern parameter u, or null if not bound.
+     * @return true if the input is a valid (partial) match of the pattern.
+     * 
+     */
+    public boolean hasMatch(final Issue pI, final User pU) {
+      return rawHasMatch(new Object[]{pI, pU});
+    }
+    
+    /**
+     * Returns the number of all matches of the pattern that conform to the given fixed values of some parameters.
+     * @param pI the fixed value of pattern parameter i, or null if not bound.
+     * @param pU the fixed value of pattern parameter u, or null if not bound.
+     * @return the number of pattern matches found.
+     * 
+     */
+    public int countMatches(final Issue pI, final User pU) {
+      return rawCountMatches(new Object[]{pI, pU});
+    }
+    
+    /**
+     * 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 pI the fixed value of pattern parameter i, or null if not bound.
+     * @param pU the fixed value of pattern parameter u, 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 Issue pI, final User pU, final Consumer<? super ConsecutiveUnSubWithoutSub.Match> processor) {
+      return rawForOneArbitraryMatch(new Object[]{pI, pU}, 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 pI the fixed value of pattern parameter i, or null if not bound.
+     * @param pU the fixed value of pattern parameter u, or null if not bound.
+     * @return the (partial) match object.
+     * 
+     */
+    public ConsecutiveUnSubWithoutSub.Match newMatch(final Issue pI, final User pU) {
+      return ConsecutiveUnSubWithoutSub.Match.newMatch(pI, pU);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for i.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<Issue> rawStreamAllValuesOfi(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_I, parameters).map(Issue.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for i.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Issue> getAllValuesOfi() {
+      return rawStreamAllValuesOfi(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for i.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<Issue> streamAllValuesOfi() {
+      return rawStreamAllValuesOfi(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for i.
+     * </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<Issue> streamAllValuesOfi(final ConsecutiveUnSubWithoutSub.Match partialMatch) {
+      return rawStreamAllValuesOfi(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for i.
+     * </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<Issue> streamAllValuesOfi(final User pU) {
+      return rawStreamAllValuesOfi(new Object[]{null, pU});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for i.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Issue> getAllValuesOfi(final ConsecutiveUnSubWithoutSub.Match partialMatch) {
+      return rawStreamAllValuesOfi(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for i.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<Issue> getAllValuesOfi(final User pU) {
+      return rawStreamAllValuesOfi(new Object[]{null, pU}).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for u.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    protected Stream<User> rawStreamAllValuesOfu(final Object[] parameters) {
+      return rawStreamAllValues(POSITION_U, parameters).map(User.class::cast);
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for u.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<User> getAllValuesOfu() {
+      return rawStreamAllValuesOfu(emptyArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for u.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Stream<User> streamAllValuesOfu() {
+      return rawStreamAllValuesOfu(emptyArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for u.
+     * </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<User> streamAllValuesOfu(final ConsecutiveUnSubWithoutSub.Match partialMatch) {
+      return rawStreamAllValuesOfu(partialMatch.toArray());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for u.
+     * </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<User> streamAllValuesOfu(final Issue pI) {
+      return rawStreamAllValuesOfu(new Object[]{pI, null});
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for u.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<User> getAllValuesOfu(final ConsecutiveUnSubWithoutSub.Match partialMatch) {
+      return rawStreamAllValuesOfu(partialMatch.toArray()).collect(Collectors.toSet());
+    }
+    
+    /**
+     * Retrieve the set of values that occur in matches for u.
+     * @return the Set of all values or empty set if there are no matches
+     * 
+     */
+    public Set<User> getAllValuesOfu(final Issue pI) {
+      return rawStreamAllValuesOfu(new Object[]{pI, null}).collect(Collectors.toSet());
+    }
+    
+    @Override
+    protected ConsecutiveUnSubWithoutSub.Match tupleToMatch(final Tuple t) {
+      try {
+          return ConsecutiveUnSubWithoutSub.Match.newMatch((Issue) t.get(POSITION_I), (User) t.get(POSITION_U));
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in tuple not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected ConsecutiveUnSubWithoutSub.Match arrayToMatch(final Object[] match) {
+      try {
+          return ConsecutiveUnSubWithoutSub.Match.newMatch((Issue) match[POSITION_I], (User) match[POSITION_U]);
+      } catch(ClassCastException e) {
+          LOGGER.error("Element(s) in array not properly typed!",e);
+          return null;
+      }
+    }
+    
+    @Override
+    protected ConsecutiveUnSubWithoutSub.Match arrayToMatchMutable(final Object[] match) {
+      try {
+          return ConsecutiveUnSubWithoutSub.Match.newMutableMatch((Issue) match[POSITION_I], (User) match[POSITION_U]);
+      } 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<ConsecutiveUnSubWithoutSub.Matcher> querySpecification() {
+      return ConsecutiveUnSubWithoutSub.instance();
+    }
+  }
+  
+  private ConsecutiveUnSubWithoutSub() {
+    super(GeneratedPQuery.INSTANCE);
+  }
+  
+  /**
+   * @return the singleton instance of the query specification
+   * @throws ViatraQueryRuntimeException if the pattern definition could not be loaded
+   * 
+   */
+  public static ConsecutiveUnSubWithoutSub instance() {
+    try{
+        return LazyHolder.INSTANCE;
+    } catch (ExceptionInInitializerError err) {
+        throw processInitializerError(err);
+    }
+  }
+  
+  @Override
+  protected ConsecutiveUnSubWithoutSub.Matcher instantiate(final ViatraQueryEngine engine) {
+    return ConsecutiveUnSubWithoutSub.Matcher.on(engine);
+  }
+  
+  @Override
+  public ConsecutiveUnSubWithoutSub.Matcher instantiate() {
+    return ConsecutiveUnSubWithoutSub.Matcher.create();
+  }
+  
+  @Override
+  public ConsecutiveUnSubWithoutSub.Match newEmptyMatch() {
+    return ConsecutiveUnSubWithoutSub.Match.newEmptyMatch();
+  }
+  
+  @Override
+  public ConsecutiveUnSubWithoutSub.Match newMatch(final Object... parameters) {
+    return ConsecutiveUnSubWithoutSub.Match.newMatch((github.Issue) parameters[0], (github.User) parameters[1]);
+  }
+  
+  /**
+   * Inner class allowing the singleton instance of {@link ConsecutiveUnSubWithoutSub} to be created 
+   *     <b>not</b> at the class load time of the outer class, 
+   *     but rather at the first call to {@link ConsecutiveUnSubWithoutSub#instance()}.
+   * 
+   * <p> This workaround is required e.g. to support recursion.
+   * 
+   */
+  private static class LazyHolder {
+    private static final ConsecutiveUnSubWithoutSub INSTANCE = new ConsecutiveUnSubWithoutSub();
+    
+    /**
+     * 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 ConsecutiveUnSubWithoutSub.GeneratedPQuery INSTANCE = new GeneratedPQuery();
+    
+    private final PParameter parameter_i = new PParameter("i", "github.Issue", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("sure.ghtorrent.github", "Issue")), PParameterDirection.INOUT);
+    
+    private final PParameter parameter_u = new PParameter("u", "github.User", new EClassTransitiveInstancesKey((EClass)getClassifierLiteralSafe("sure.ghtorrent.github", "User")), PParameterDirection.INOUT);
+    
+    private final List<PParameter> parameters = Arrays.asList(parameter_i, parameter_u);
+    
+    private GeneratedPQuery() {
+      super(PVisibility.PUBLIC);
+    }
+    
+    @Override
+    public String getFullyQualifiedName() {
+      return "queries.consecutiveUnSubWithoutSub";
+    }
+    
+    @Override
+    public List<String> getParameterNames() {
+      return Arrays.asList("i","u");
+    }
+    
+    @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_i = body.getOrCreateVariableByName("i");
+          PVariable var_u = body.getOrCreateVariableByName("u");
+          PVariable var_a1 = body.getOrCreateVariableByName("a1");
+          PVariable var_a2 = body.getOrCreateVariableByName("a2");
+          PVariable var___0_ = body.getOrCreateVariableByName("_<0>");
+          new TypeConstraint(body, Tuples.flatTupleOf(var_i), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("sure.ghtorrent.github", "Issue")));
+          new TypeConstraint(body, Tuples.flatTupleOf(var_u), new EClassTransitiveInstancesKey((EClass)getClassifierLiteral("sure.ghtorrent.github", "User")));
+          body.setSymbolicParameters(Arrays.<ExportedParameter>asList(
+             new ExportedParameter(body, var_i, parameter_i),
+             new ExportedParameter(body, var_u, parameter_u)
+          ));
+          //    find checkUserAction(i, u, a1, Action::UNSUBSCRIBED)
+          PVariable var__virtual_0_ = body.getOrCreateVariableByName(".virtual{0}");
+          new ConstantValue(body, var__virtual_0_, getEnumLiteral("sure.ghtorrent.github", "Action", "UNSUBSCRIBED").getInstance());
+          new PositivePatternCall(body, Tuples.flatTupleOf(var_i, var_u, var_a1, var__virtual_0_), CheckUserAction.instance().getInternalQueryRepresentation());
+          //    find checkUserAction(i, u, a2, Action::UNSUBSCRIBED)
+          PVariable var__virtual_1_ = body.getOrCreateVariableByName(".virtual{1}");
+          new ConstantValue(body, var__virtual_1_, getEnumLiteral("sure.ghtorrent.github", "Action", "UNSUBSCRIBED").getInstance());
+          new PositivePatternCall(body, Tuples.flatTupleOf(var_i, var_u, var_a2, var__virtual_1_), CheckUserAction.instance().getInternalQueryRepresentation());
+          //    a1 != a2
+          new Inequality(body, var_a1, var_a2);
+          //    neg find isSubscribe(i, u, _)
+          new NegativePatternCall(body, Tuples.flatTupleOf(var_i, var_u, var___0_), IsSubscribe.instance().getInternalQueryRepresentation());
+          bodies.add(body);
+      }
+      {
+          PAnnotation annotation = new PAnnotation("Constraint");
+          annotation.addAttribute("key", Arrays.asList(new Object[] {
+                              new ParameterReference("i"), 
+                              new ParameterReference("u")
+                              }));
+          annotation.addAttribute("severity", "error");
+          annotation.addAttribute("message", "error");
+          addAnnotation(annotation);
+      }
+      return bodies;
+    }
+  }
+}