/*
* 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.openjpa.kernel.exps;
import java.util.Collection;
import java.util.Map;
/**
* Returns the count of a collection.
*
* @author Marc Prud'hommeaux
*/
class Size
extends UnaryMathVal {
public Size(Val val) {
super(val);
}
protected Class getType(Class c) {
return int.class;
}
protected Object operate(Object o, Class c) {
if (o instanceof Collection)
return ((Collection) o).size();
if (o instanceof Map)
return ((Map) o).size();
return (o == null) ? 0 : 1;
}
}