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/*******************************************************************************
* Copyright (c) 2004-2010 Zoltan Ujhelyi, Gabor Bergmann, IncQuery Labs Ltd.
* 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 tools.refinery.viatra.runtime.matchers.context.IInputKey;
import tools.refinery.viatra.runtime.matchers.planning.QueryProcessingException;
import tools.refinery.viatra.runtime.matchers.psystem.PBody;
import tools.refinery.viatra.runtime.matchers.psystem.queries.PQuery;
import tools.refinery.viatra.runtime.matchers.tuple.Tuple;
/**
* For a binary base pattern over an enumerable universe type, computes the reflexive transitive closure (base)*
*
* @author Gabor Bergmann, Zoltan Ujhelyi
* @since 2.0
*/
public class BinaryReflexiveTransitiveClosure extends AbstractTransitiveClosure {
private final IInputKey universeType;
public BinaryReflexiveTransitiveClosure(PBody pBody, Tuple variablesTuple,
PQuery pattern, IInputKey universeType) {
super(pBody, variablesTuple, pattern);
this.universeType = universeType;
}
@Override
protected String keyToString() {
return supplierKey.getFullyQualifiedName() + "*";
}
/**
* Returns the type whose instances should be returned as 0-long paths.
* @since 2.0
*/
public IInputKey getUniverseType() {
return universeType;
}
@Override
public void checkSanity() {
if (!universeType.isEnumerable() || universeType.getArity() != 1) {
throw new QueryProcessingException(
String.format("Invalid universe type %s - it should be enumerable and must have an arity of 1.",
universeType.getPrettyPrintableName()),
pBody.getPattern());
}
}
}
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