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/*******************************************************************************
* Copyright (c) 2010-2014, Zoltan Ujhelyi, Istvan Rath and Daniel Varro
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-v20.html.
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package tools.refinery.viatra.runtime.matchers.psystem.basicenumerables;
import java.util.Collections;
import java.util.Map;
import java.util.Set;
import tools.refinery.viatra.runtime.matchers.context.IInputKey;
import tools.refinery.viatra.runtime.matchers.context.IQueryMetaContext;
import tools.refinery.viatra.runtime.matchers.psystem.ITypeConstraint;
import tools.refinery.viatra.runtime.matchers.psystem.KeyedEnumerablePConstraint;
import tools.refinery.viatra.runtime.matchers.psystem.PBody;
import tools.refinery.viatra.runtime.matchers.psystem.PVariable;
import tools.refinery.viatra.runtime.matchers.psystem.TypeJudgement;
import tools.refinery.viatra.runtime.matchers.tuple.Tuple;
/**
* Represents an enumerable type constraint that asserts that values substituted for the given tuple of variables
* form a tuple that belongs to an enumerable extensional relation identified by an {@link IInputKey}.
*
* <p> The InputKey must be enumerable!
*
* @author Zoltan Ujhelyi
*
*/
public class TypeConstraint extends KeyedEnumerablePConstraint<IInputKey> implements ITypeConstraint {
private TypeJudgement equivalentJudgement;
public TypeConstraint(PBody pBody, Tuple variablesTuple, IInputKey inputKey) {
super(pBody, variablesTuple, inputKey);
this.equivalentJudgement = new TypeJudgement(inputKey, variablesTuple);
if (! inputKey.isEnumerable())
throw new IllegalArgumentException(
this.getClass().getSimpleName() +
" applicable for enumerable input keys only; received instead " +
inputKey);
if (variablesTuple.getSize() != inputKey.getArity())
throw new IllegalArgumentException(
this.getClass().getSimpleName() +
" applied for variable tuple " + variablesTuple + " having wrong arity for input key " +
inputKey);
}
@Override
protected String keyToString() {
return supplierKey.getPrettyPrintableName();
}
@Override
public TypeJudgement getEquivalentJudgement() {
return equivalentJudgement;
}
@Override
public Set<TypeJudgement> getImpliedJudgements(IQueryMetaContext context) {
return Collections.singleton(equivalentJudgement);
//return equivalentJudgement.getDirectlyImpliedJudgements(context);
}
@Override
public Map<Set<PVariable>, Set<PVariable>> getFunctionalDependencies(IQueryMetaContext context) {
return TypeConstraintUtil.getFunctionalDependencies(context, supplierKey, variablesTuple);
}
@Override
public void doReplaceVariable(PVariable obsolete, PVariable replacement) {
super.doReplaceVariable(obsolete, replacement);
this.equivalentJudgement = new TypeJudgement(getSupplierKey(), variablesTuple);
}
}
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