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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.struts2.el;
import javax.el.ELContext;
import javax.el.ExpressionFactory;
import javax.el.MethodExpression;
import javax.el.ValueExpression;
import org.apache.struts2.el.lang.ELSupport;
import org.apache.struts2.el.lang.ExpressionBuilder;
import org.apache.struts2.el.util.MessageFactory;
/**
* @see javax.el.ExpressionFactory
*
* @author Jacob Hookom [jacob@hookom.net]
* @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: markt $
*/
public class ExpressionFactoryImpl extends ExpressionFactory {
/**
*
*/
public ExpressionFactoryImpl() {
super();
}
public Object coerceToType(Object obj, Class type) {
return ELSupport.coerceToType(obj, type);
}
public MethodExpression createMethodExpression(ELContext context,
String expression, Class<?> expectedReturnType,
Class<?>[] expectedParamTypes) {
if (expectedParamTypes == null) {
throw new NullPointerException(MessageFactory
.get("error.method.nullParms"));
}
ExpressionBuilder builder = new ExpressionBuilder(expression, context);
return builder.createMethodExpression(expectedReturnType,
expectedParamTypes);
}
public ValueExpression createValueExpression(ELContext context,
String expression, Class expectedType) {
if (expectedType == null) {
throw new NullPointerException(MessageFactory
.get("error.value.expectedType"));
}
ExpressionBuilder builder = new ExpressionBuilder(expression, context);
return builder.createValueExpression(expectedType);
}
public ValueExpression createValueExpression(Object instance,
Class expectedType) {
if (expectedType == null) {
throw new NullPointerException(MessageFactory
.get("error.value.expectedType"));
}
return new ValueExpressionLiteral(instance, expectedType);
}
}