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/*******************************************************************************
* Copyright (c) 2010-2013, 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.localsearch.operations.check;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.function.Function;
import tools.refinery.viatra.runtime.localsearch.MatchingFrame;
import tools.refinery.viatra.runtime.localsearch.matcher.ISearchContext;
import tools.refinery.viatra.runtime.localsearch.operations.CheckOperationExecutor;
import tools.refinery.viatra.runtime.localsearch.operations.ISearchOperation;
import tools.refinery.viatra.runtime.localsearch.operations.MatchingFrameValueProvider;
import tools.refinery.viatra.runtime.matchers.psystem.IExpressionEvaluator;
/**
* @author Zoltan Ujhelyi
* @noextend This class is not intended to be subclassed by clients.
*/
public class ExpressionCheck implements ISearchOperation {
private class Executor extends CheckOperationExecutor {
@Override
protected boolean check(MatchingFrame frame, ISearchContext context) {
try {
boolean result = (Boolean) evaluator.evaluateExpression(new MatchingFrameValueProvider(frame, nameMap));
return result;
} catch (Exception e) {
context.getLogger().warn("Error while evaluating expression", e);
return false;
}
}
@Override
public ISearchOperation getOperation() {
return ExpressionCheck.this;
}
}
IExpressionEvaluator evaluator;
Map<String, Integer> nameMap;
public ExpressionCheck(IExpressionEvaluator evaluator, Map<String, Integer> nameMap) {
super();
this.evaluator = evaluator;
this.nameMap = nameMap;
}
@Override
public ISearchOperationExecutor createExecutor() {
return new Executor();
}
@Override
public List<Integer> getVariablePositions() {
// XXX not sure if this is the correct implementation to get the affected variable indicies
return new ArrayList<>(nameMap.values());
}
@Override
public String toString() {
return toString(Object::toString);
}
@Override
public String toString(Function<Integer, String> variableMapping) {
return "check expression "+evaluator.getShortDescription();
}
}
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