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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.jasper.el;
import javax.el.ELContext;
import javax.el.ExpressionFactory;
import javax.el.ValueExpression;
import javax.servlet.jsp.el.ELException;
import javax.servlet.jsp.el.ELParseException;
import javax.servlet.jsp.el.Expression;
import javax.servlet.jsp.el.ExpressionEvaluator;
import javax.servlet.jsp.el.FunctionMapper;
import javax.servlet.jsp.el.VariableResolver;
public final class ExpressionEvaluatorImpl extends ExpressionEvaluator {
private final ExpressionFactory factory;
public ExpressionEvaluatorImpl(ExpressionFactory factory) {
this.factory = factory;
}
public Expression parseExpression(String expression, Class expectedType,
FunctionMapper fMapper) throws ELException {
try {
ELContextImpl ctx = new ELContextImpl(ELResolverImpl.DefaultResolver);
if (fMapper != null) {
ctx.setFunctionMapper(new FunctionMapperImpl(fMapper));
}
ValueExpression ve = this.factory.createValueExpression(ctx, expression, expectedType);
return new ExpressionImpl(ve);
} catch (javax.el.ELException e) {
throw new ELParseException(e.getMessage());
}
}
public Object evaluate(String expression, Class expectedType,
VariableResolver vResolver, FunctionMapper fMapper)
throws ELException {
return this.parseExpression(expression, expectedType, fMapper).evaluate(vResolver);
}
}
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