/*
* Copyright 2004-2005 the original author or authors.
*
* Licensed 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.springmodules.validation.valang.functions;
import java.lang.reflect.Array;
import java.util.Collection;
/**
* <p>Gets the length of a string.
*
* @author Steven Devijver
* @author Uri Boness
* @since Apr 23, 2005
*/
public class LengthOfFunction extends AbstractFunction {
public LengthOfFunction(Function[] arguments, int line, int column) {
super(arguments, line, column);
definedExactNumberOfArguments(1);
}
protected Object doGetResult(Object target) {
Object result = getArguments()[0].getResult(target);
if (Collection.class.isAssignableFrom(result.getClass())) {
return new Integer(((Collection) result).size());
}
if (result.getClass().isArray()) {
return new Integer(Array.getLength(result));
}
return new Integer(result.toString().length());
}
}