org.navimatrix.jaxen.function.ContainsFunction Maven / Gradle / Ivy
/*
* $Header: /cvs/jaxen/jaxen/src/java/main/org/jaxen/function/ContainsFunction.java,v 1.10 2006/02/05 21:47:41 elharo Exp $
* $Revision: 1.10 $
* $Date: 2006/02/05 21:47:41 $
*
* ====================================================================
*
* Copyright 2000-2002 bob mcwhirter & James Strachan.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of the Jaxen Project nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ====================================================================
* This software consists of voluntary contributions made by many
* individuals on behalf of the Jaxen Project and was originally
* created by bob mcwhirter and
* James Strachan . For more information on the
* Jaxen Project, please see .
*
* $Id: ContainsFunction.java,v 1.10 2006/02/05 21:47:41 elharo Exp $
*/
package org.navimatrix.jaxen.function;
import java.util.List;
import org.navimatrix.jaxen.Context;
import org.navimatrix.jaxen.Function;
import org.navimatrix.jaxen.FunctionCallException;
import org.navimatrix.jaxen.Navigator;
/**
* 4.2 boolean contains(string,string)
*
*
* The contains function returns true if the first argument
* string contains the second argument string, and otherwise returns false.
*
*
* @author bob mcwhirter (bob @ werken.com)
*
* @see Section 4.2 of the XPath Specification
*/
public class ContainsFunction implements Function
{
/**
* Create a new ContainsFunction
object.
*/
public ContainsFunction() {}
/**
*
* Returns true if the string-value of the
* first item in args
contains string-value of the second
* item; false otherwise.
* If necessary one or both items are converted to a string as if by the XPath
* string()
function.
*
*
* @param context the context at the point in the
* expression when the function is called
* @param args a list containing exactly two items
*
* @return the result of evaluating the function;
* Boolean.TRUE
or Boolean.FALSE
*
* @throws FunctionCallException if args
does not have exactly two items
*/
public Object call(Context context,
List args) throws FunctionCallException
{
if (args.size() == 2)
{
return evaluate(args.get(0),
args.get(1),
context.getNavigator() );
}
throw new FunctionCallException("contains() requires two arguments.");
}
/**
* Returns true if the first string contains the second string; false otherwise.
* If necessary one or both arguments are converted to a string as if by the XPath
* string()
function.
*
*
* @param strArg the containing string
* @param matchArg the contained string
* @param nav used to calculate the string-values of the first two arguments
*
* @return Boolean.TRUE
if true if the first string contains
* the second string; Boolean.FALSE
otherwise.
*/
public static Boolean evaluate(Object strArg,
Object matchArg,
Navigator nav)
{
String str = StringFunction.evaluate( strArg,
nav );
String match = StringFunction.evaluate( matchArg,
nav );
return ( ( str.indexOf(match) >= 0)
? Boolean.TRUE
: Boolean.FALSE
);
}
}
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