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/*
* generated by Xtext 2.25.0
*/
package org.eclipse.viatra.solver.language.scoping;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.viatra.solver.language.ProblemUtil;
import org.eclipse.viatra.solver.language.model.problem.Argument;
import org.eclipse.viatra.solver.language.model.problem.ClassDeclaration;
import org.eclipse.viatra.solver.language.model.problem.ExistentialQuantifier;
import org.eclipse.viatra.solver.language.model.problem.PredicateDefinition;
import org.eclipse.viatra.solver.language.model.problem.ProblemPackage;
import org.eclipse.viatra.solver.language.model.problem.ReferenceDeclaration;
import org.eclipse.viatra.solver.language.model.problem.Relation;
import org.eclipse.viatra.solver.language.model.problem.Variable;
import org.eclipse.xtext.EcoreUtil2;
import org.eclipse.xtext.scoping.IScope;
import org.eclipse.xtext.scoping.Scopes;
/**
* This class contains custom scoping description.
*
* See
* https://www.eclipse.org/Xtext/documentation/303_runtime_concepts.html#scoping
* on how and when to use it.
*/
public class ProblemScopeProvider extends AbstractProblemScopeProvider {
@Override
public IScope getScope(EObject context, EReference reference) {
IScope scope = super.getScope(context, reference);
if (reference == ProblemPackage.Literals.ARGUMENT__VARIABLE_OR_NODE) {
return getVariableScope(context, scope);
} else if (reference == ProblemPackage.Literals.REFERENCE_DECLARATION__OPPOSITE) {
return getOppositeScope(context, scope);
}
return scope;
}
protected IScope getVariableScope(EObject context, IScope delegateScope) {
List<Variable> variables = new ArrayList<>();
EObject currentContext = context;
if (context instanceof Argument) {
Argument argument = (Argument) context;
Variable singletonVariable = argument.getSingletonVariable();
if (singletonVariable != null) {
variables.add(singletonVariable);
}
}
while (currentContext != null && !(currentContext instanceof PredicateDefinition)) {
if (currentContext instanceof ExistentialQuantifier) {
ExistentialQuantifier quantifier = (ExistentialQuantifier) currentContext;
variables.addAll(quantifier.getImplicitVariables());
}
currentContext = currentContext.eContainer();
}
if (currentContext instanceof PredicateDefinition) {
PredicateDefinition definition = (PredicateDefinition) currentContext;
variables.addAll(definition.getParameters());
}
return Scopes.scopeFor(variables, delegateScope);
}
protected IScope getOppositeScope(EObject context, IScope delegateScope) {
ReferenceDeclaration referenceDeclaration = EcoreUtil2.getContainerOfType(context, ReferenceDeclaration.class);
if (referenceDeclaration == null) {
return delegateScope;
}
Relation relation = referenceDeclaration.getReferenceType();
if (!(relation instanceof ClassDeclaration)) {
return delegateScope;
}
ClassDeclaration classDeclaration = (ClassDeclaration) relation;
Collection<ReferenceDeclaration> referenceDeclarations = ProblemUtil
.getAllReferenceDeclarations(classDeclaration);
return Scopes.scopeFor(referenceDeclarations, delegateScope);
}
}
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