/*
* Copyright 2012 Tacit Knowledge.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.tacitknowledge.flip.aspectj;
import org.apache.commons.jexl2.Expression;
import org.apache.commons.jexl2.JexlContext;
import org.apache.commons.jexl2.JexlEngine;
import org.apache.commons.jexl2.ObjectContext;
/**
* This is default value expression evaluator. This evaluator uses Jexl to evaluate
* the expressions.
*
* @author ssoloviov
*/
public class JexlValueExpressionEvaluator implements ValueExpressionEvaluator {
private JexlEngine engine = new JexlEngine();
/**
* {@inheritDoc }
*/
public Object evaluate(Object context, String expression) {
Expression jexlExpression = engine.createExpression(expression);
JexlContext jexlContext = new ObjectContext(engine, context);
return jexlExpression.evaluate(jexlContext);
}
}