61 lines
2.0 KiB
Java
61 lines
2.0 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* Generated By:JJTree: Do not edit this line. AstEmpty.java */
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package org.apache.el.parser;
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import java.util.Collection;
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import java.util.Map;
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import javax.el.ELException;
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import org.apache.el.lang.EvaluationContext;
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/**
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* @author Jacob Hookom [jacob@hookom.net]
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*/
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public final class AstEmpty extends SimpleNode {
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public AstEmpty(int id) {
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super(id);
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}
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@Override
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public Class<?> getType(EvaluationContext ctx)
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throws ELException {
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return Boolean.class;
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}
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@Override
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public Object getValue(EvaluationContext ctx)
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throws ELException {
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Object obj = this.children[0].getValue(ctx);
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if (obj == null) {
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return Boolean.TRUE;
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} else if (obj instanceof String) {
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return Boolean.valueOf(((String) obj).length() == 0);
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} else if (obj instanceof Object[]) {
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return Boolean.valueOf(((Object[]) obj).length == 0);
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} else if (obj instanceof Collection<?>) {
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return Boolean.valueOf(((Collection<?>) obj).isEmpty());
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} else if (obj instanceof Map<?,?>) {
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return Boolean.valueOf(((Map<?,?>) obj).isEmpty());
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}
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return Boolean.FALSE;
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}
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}
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