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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.matchers.tuple;
import java.util.Map;
import tools.refinery.viatra.runtime.matchers.psystem.IValueProvider;
/**
* @author Zoltan Ujhelyi
* @since 1.7
*/
public class TupleValueProvider implements IValueProvider {
final ITuple tuple;
final Map<String, Integer> indexMapping;
/**
* Wraps a tuple with an index mapping
* @param tuple
* @param indexMapping
*/
public TupleValueProvider(ITuple tuple, Map<String, Integer> indexMapping) {
super();
this.tuple = tuple;
this.indexMapping = indexMapping;
}
@Override
public Object getValue(String variableName) {
Integer index = indexMapping.get(variableName);
if (index == null) {
throw new IllegalArgumentException(String.format("Variable %s is not present in mapping.", variableName));
}
Object value = tuple.get(index);
if (value == null) {
throw new IllegalArgumentException(String.format("Variable %s is not found using index %d.", variableName, index));
}
return value;
}
}
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