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/*******************************************************************************
* Copyright (c) 2010-2015, Bergmann Gabor, 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;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Map.Entry;
import tools.refinery.viatra.runtime.matchers.context.IInputKey;
import tools.refinery.viatra.runtime.matchers.context.IQueryMetaContext;
import tools.refinery.viatra.runtime.matchers.tuple.Tuple;
import java.util.Set;
/**
* Common superinterface of enumerable and deferred type constraints.
* @author Bergmann Gabor
*
*/
public interface ITypeConstraint extends ITypeInfoProviderConstraint {
public abstract TypeJudgement getEquivalentJudgement();
/**
* Static internal utility class for implementations of {@link ITypeConstraint}s.
* @author Bergmann Gabor
*/
public static class TypeConstraintUtil {
private TypeConstraintUtil() {
// Hiding constructor for utility class
}
public static Map<Set<PVariable>, Set<PVariable>> getFunctionalDependencies(IQueryMetaContext context, IInputKey inputKey, Tuple variablesTuple) {
final Map<Set<PVariable>, Set<PVariable>> result = new HashMap<Set<PVariable>, Set<PVariable>>();
Set<Entry<Set<Integer>, Set<Integer>>> dependencies = context.getFunctionalDependencies(inputKey).entrySet();
for (Entry<Set<Integer>, Set<Integer>> dependency : dependencies) {
result.put(
transcribeVariables(dependency.getKey(), variablesTuple),
transcribeVariables(dependency.getValue(), variablesTuple)
);
}
return result;
}
private static Set<PVariable> transcribeVariables(Set<Integer> indices, Tuple variablesTuple) {
Set<PVariable> result = new HashSet<PVariable>();
for (Integer index : indices) {
result.add((PVariable) variablesTuple.get(index));
}
return result;
}
}
}
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