/**
* Copyright 2015 Santhosh Kumar Tekuri
*
* The JLibs authors license 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 jlibs.examples.xml.sax.dog;
import javax.xml.namespace.QName;
import javax.xml.xpath.XPathFunction;
import javax.xml.xpath.XPathFunctionException;
import javax.xml.xpath.XPathFunctionResolver;
import java.util.List;
/**
* @author Santhosh Kumar T
*/
public class TestFunctionResolver implements XPathFunctionResolver{
@Override
public XPathFunction resolveFunction(QName functionName, int arity) {
if(functionName.equals(new QName("http://jlibs.googlecode.com", "reverse")))
return REVERSE;
else
return null;
}
private static final XPathFunction REVERSE = new XPathFunction() {
@Override
public Object evaluate(List args) throws XPathFunctionException{
char[] ch = ((String)args.get(0)).toCharArray();
for(int i=0, j=ch.length-1; i<j; i++, j--){
char temp = ch[i];
ch[i] = ch[j];
ch[j] = temp;
}
return new String(ch);
}
};
}