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package org.eclipse.viatra.solver.data.query;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.eclipse.viatra.query.runtime.api.GenericPatternMatcher;
import org.eclipse.viatra.query.runtime.api.GenericQuerySpecification;
import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
import org.eclipse.viatra.query.runtime.api.scope.QueryScope;
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.basicdeferred.Equality;
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.BinaryReflexiveTransitiveClosure;
import org.eclipse.viatra.query.runtime.matchers.psystem.basicenumerables.BinaryTransitiveClosure;
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.BasePQuery;
import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PParameter;
import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PQuery;
import org.eclipse.viatra.query.runtime.matchers.psystem.queries.PVisibility;
import org.eclipse.viatra.query.runtime.matchers.tuple.Tuples;
import org.eclipse.viatra.solver.data.query.view.RelationView;
public class RelationalQuery extends BasePQuery {
private final Map<String, PParameter> parameters = new HashMap<String, PParameter>();
private String fullyQualifiedName;
private LinkedList<PBody> bodies = new LinkedList<PBody>();
private List<ExportedParameter> symbolicParameters;
public RelationalQuery(String fullyQualifiedName) {
super(PVisibility.PUBLIC);
this.fullyQualifiedName = fullyQualifiedName;
PBody body = new PBody(this);
bodies.add(body);
}
@Override
public String getFullyQualifiedName() {
return fullyQualifiedName;
}
public RelationalQuery addParameter(String name, RelationView<?> type) {
PParameter parameter = new PParameter(name);
parameters.put(name, parameter);
PBody body = bodies.peekLast();
List<ExportedParameter> symbolicParameters = new ArrayList<>();
parameters.forEach((pName, pParameter) -> {
PVariable var = body.getOrCreateVariableByName(pName);
symbolicParameters.add(new ExportedParameter(body, var, pParameter));
});
body.setSymbolicParameters(symbolicParameters);
return this;
}
@Override
public List<PParameter> getParameters() {
return new ArrayList<PParameter>(parameters.values());
}
public <D> RelationalQuery addConstraint(RelationView<D> view, String... name) {
if(name.length != view.getArity()) {
throw new IllegalArgumentException("Arity ("+view.getArity()+") does not match parameter numbers ("+name.length+")");
}
PBody body = bodies.peekLast();
Object[] variables = new Object[name.length];
for(int i = 0; i<name.length; i++) {
variables[i] = body.getOrCreateVariableByName(name[i]);
}
new TypeConstraint(body, Tuples.flatTupleOf(variables), view);
return this;
}
// // Type constraint
// public RelationQuery addConstraint(String type, String name) {
// PBody body = bodies.peekLast();
// PVariable var = body.getOrCreateVariableByName(name);
// new TypeConstraint(body, Tuples.flatTupleOf(var), new StringExactInstancesKey(type));
// return this;
// }
//
// // Relation constraint
// public RelationQuery addConstraint(String type, String sourceName, String targetName) {
// PBody body = bodies.peekLast();
// PVariable var_source = body.getOrCreateVariableByName(sourceName);
// PVariable var_target = body.getOrCreateVariableByName(targetName);
// new TypeConstraint(body, Tuples.flatTupleOf(var_source, var_target),
// new StringStructuralFeatureInstancesKey(type));
// return this;
// }
// Create new Body
public RelationalQuery or() {
PBody body = new PBody(this);
List<ExportedParameter> symbolicParameters = new ArrayList<>();
parameters.forEach((name, parameter) -> {
PVariable var = body.getOrCreateVariableByName(name);
symbolicParameters.add(new ExportedParameter(body, var, parameter));
});
body.setSymbolicParameters(symbolicParameters);
bodies.add(body);
return this;
}
// Equality constraint
public RelationalQuery addEquality(String sourceName, String targetName) {
PBody body = bodies.peekLast();
PVariable var_source = body.getOrCreateVariableByName(sourceName);
PVariable var_target = body.getOrCreateVariableByName(targetName);
new Equality(body, var_source, var_target);
return this;
}
// Inequality constraint
public RelationalQuery addInequality(String sourceName, String targetName) {
PBody body = bodies.peekLast();
PVariable var_source = body.getOrCreateVariableByName(sourceName);
PVariable var_target = body.getOrCreateVariableByName(targetName);
new Inequality(body, var_source, var_target);
return this;
}
// Positive pattern call
public RelationalQuery addPatternCall(PQuery query, String... names) {
PBody body = bodies.peekLast();
PVariable[] vars = new PVariable[names.length];
for (int i = 0; i < names.length; i++) {
vars[i] = body.getOrCreateVariableByName(names[i]);
}
new PositivePatternCall(body, Tuples.flatTupleOf(vars), query);
return this;
}
// Negative pattern call
public RelationalQuery addNegativePatternCall(PQuery query, String... names) {
PBody body = bodies.peekLast();
PVariable[] vars = new PVariable[names.length];
for (int i = 0; i < names.length; i++) {
vars[i] = body.getOrCreateVariableByName(names[i]);
}
new NegativePatternCall(body, Tuples.flatTupleOf(vars), query);
return this;
}
// Binary transitive closure pattern call
public RelationalQuery addBinaryTransitiveClosure(PQuery query, String sourceName, String targetName) {
PBody body = bodies.peekLast();
PVariable var_source = body.getOrCreateVariableByName(sourceName);
PVariable var_target = body.getOrCreateVariableByName(targetName);
new BinaryTransitiveClosure(body, Tuples.flatTupleOf(var_source, var_target), query);
return this;
}
// Binary reflexive transitive closure pattern call
public RelationalQuery addBinaryReflexiveTransitiveClosure(PQuery query, String sourceName, String targetName) {
PBody body = bodies.peekLast();
PVariable var_source = body.getOrCreateVariableByName(sourceName);
PVariable var_target = body.getOrCreateVariableByName(targetName);
new BinaryReflexiveTransitiveClosure(body, Tuples.flatTupleOf(var_source, var_target), query,
query.getParameters().get(0).getDeclaredUnaryType());
return this;
}
@Override
public Set<PBody> doGetContainedBodies() {
setEvaluationHints(new QueryEvaluationHint(null, QueryEvaluationHint.BackendRequirement.UNSPECIFIED));
return new LinkedHashSet<PBody>(bodies);
}
public void addSymbolicParameters(ExportedParameter symbolicParameter) {
checkMutability();
if (symbolicParameters == null) {
symbolicParameters = new ArrayList<>();
}
symbolicParameters.add(symbolicParameter);
}
public GenericQuerySpecification<GenericPatternMatcher> build() {
return new GenericQuerySpecification<GenericPatternMatcher>(this) {
@Override
public Class<? extends QueryScope> getPreferredScopeClass() {
return RelationalScope.class;
}
@Override
protected GenericPatternMatcher instantiate(ViatraQueryEngine engine) {
return defaultInstantiate(engine);
}
@Override
public GenericPatternMatcher instantiate() {
return new GenericPatternMatcher(this);
}
};
}
}
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