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Processing XML Documents Partially

import java.io.FileInputStream; import java.io.OutputStreamWriter; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.transform.OutputKeys; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerFactory; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import org.w3c.dom.Document; import org.w3c.dom.Node; import org.w3c.dom.traversal.NodeIterator; import org.xml.sax.InputSource; import com.sun.org.apache.xpath.internal.CachedXPathAPI; public class MainClass {   public static void main(String[] args) throws Exception {     InputSource in = new InputSource(new FileInputStream("y.xml"));     DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance();     dfactory.setNamespaceAware(true);     Document doc = dfactory.newDocumentBuilder().parse(in);     Transformer transformer = TransformerFactory.newInstance().newTransformer();     transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");     CachedXPathAPI path = new CachedXPathAPI();     NodeIterator nl = path.selectNodeIterator(doc, "\\abc\\");     Node n;     while ((n = nl.nextNode()) != null)       transformer.transform(new DOMSource(n), new StreamResult(new OutputStreamWriter(System.out)));   } }