Java XPath Expression deleteXMLElement(String xml, String xpath)

Description

delete XML Element

License

Open Source License

Declaration

public static String deleteXMLElement(String xml, String xpath) 

Method Source Code

//package com.java2s;
/**/*from   ww  w  .ja v  a2  s  . c  o m*/
* Copyright (c) Microsoft Corporation
* 
* All rights reserved. 
* 
* MIT License
* 
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files 
* (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, 
* publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, 
* subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR 
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH 
* THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

import java.io.StringReader;
import java.io.StringWriter;

import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.xml.sax.InputSource;

public class Main {
    public static String deleteXMLElement(String xml, String xpath) {
        try {
            final Node node = findXMLNode(xml, xpath);
            Node parent = node.getParentNode();
            parent.removeChild(node);
            return XMLtoString(parent.getOwnerDocument());
        } catch (XPathExpressionException e) {
            return null;
        }
    }

    static public Node findXMLNode(String xml, String xpath) throws XPathExpressionException {
        final InputSource parentSource = new InputSource(new StringReader(xml));
        final XPath xpathObject = XPathFactory.newInstance().newXPath();
        return (Node) xpathObject.evaluate(xpath, parentSource, XPathConstants.NODE);
    }

    static String XMLtoString(Document doc) {
        try {
            Transformer transformer = TransformerFactory.newInstance().newTransformer();
            StringWriter writer = new StringWriter();
            transformer.transform(new DOMSource(doc), new StreamResult(writer));
            return writer.getBuffer().toString();
        } catch (Exception e) {
            return null;
        }
    }
}

Related

1. createXPath(NamespaceContext namespaceContext, XPathFunctionResolver functionResolver)
2. createXPathExpression(NamespaceContext context, String xPathQuery)
3. createXPathExpression(String expression, NamespaceContext namespaceContext)
4. createXPathExpression(String xpath)
5. createXPathExpression(String xpathString)
6. dumpXpath(Node node, PrintStream printer)
7. executePath(final Node node, final XPathExpression expression)
8. expr(String xpathStr)
9. extractNode(XPath xpath, String nodePath, String xmlString)