/*

* 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.

*/

/* Generated By:JJTree: Do not edit this line. AstEmpty.java */

package org.apache.el.parser;

import java.util.Collection;

import java.util.Map;

import javax.el.ELException;

import org.apache.el.lang.EvaluationContext;

/**

* @author Jacob Hookom [jacob@hookom.net]

* @version $Id: AstEmpty.java 939311 2010-04-29 14:01:02Z kkolinko $

*/

public final class AstEmpty extends SimpleNode {

public AstEmpty(int id) {

super(id);

}

@Override

public Class<?> getType(EvaluationContext ctx)

throws ELException {

return Boolean.class;

}

@Override

public Object getValue(EvaluationContext ctx)

throws ELException {

Object obj = this.children[0].getValue(ctx);

if (obj == null) {

return Boolean.TRUE;

} else if (obj instanceof String) {

return Boolean.valueOf(((String) obj).length() == 0);

} else if (obj instanceof Object[]) {

return Boolean.valueOf(((Object[]) obj).length == 0);

} else if (obj instanceof Collection<?>) {

return Boolean.valueOf(((Collection<?>) obj).isEmpty());

} else if (obj instanceof Map<?,?>) {

return Boolean.valueOf(((Map<?,?>) obj).isEmpty());

}

return Boolean.FALSE;

}

}