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/*******************************************************************************
* Copyright (c) 2010-2015, Marton Bur, Zoltan Ujhelyi, Akos Horvath, 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.rewriters;
import tools.refinery.viatra.runtime.matchers.psystem.basicenumerables.PositivePatternCall;
/**
* Interface used by the PQueryFlattener to decide which positive pattern calls to flatten
*
* @author Marton Bur
*
*/
public interface IFlattenCallPredicate {
/**
* Decides whether the called query by the pattern call should be flattened into the caller or not.
*
* @param positivePatternCall
* the pattern call
* @return true if the call should be flattened
*/
boolean shouldFlatten(PositivePatternCall positivePatternCall);
/**
* Flattens only if all operand predicates vote for flattening.
* @author Gabor Bergmann
* @since 2.1
*/
public static class And implements IFlattenCallPredicate {
private IFlattenCallPredicate[] operands;
public And(IFlattenCallPredicate... operands) {
this.operands = operands;
}
@Override
public boolean shouldFlatten(PositivePatternCall positivePatternCall) {
for (IFlattenCallPredicate operand : operands) {
if (!operand.shouldFlatten(positivePatternCall)) return false;
}
return true;
}
}
}
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