org.apache.el.parser.AstEmpty Maven / Gradle / Ivy
/*
* 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 [[email protected]]
* @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;
}
}