Java XML Document Clone clone(Document doc)

Description

Clone a document so it can be safely modified on a per-request basis.

License

Apache License

Declaration

public static Document clone(Document doc) throws IOException 

Method Source Code

//package com.java2s;
// Licensed under the Apache License, Version 2.0 (the "License");

import org.w3c.dom.Document;

import org.w3c.dom.Node;

import java.io.IOException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

public class Main {
    /** Clone a document so it can be safely modified on a per-request basis. */
    public static Document clone(Document doc) throws IOException {
        Document d;/*w  w  w.j  a  v a  2 s.c  o m*/
        try {
            d = newBuilder().newDocument();
        } catch (ParserConfigurationException e) {
            throw new IOException("Cannot clone document");
        }
        Node n = d.importNode(doc.getDocumentElement(), true);
        d.appendChild(n);
        return d;
    }

    /** Construct a new empty document. */
    public static Document newDocument() {
        try {
            return newBuilder().newDocument();
        } catch (ParserConfigurationException e) {
            throw new RuntimeException("Cannot create new document", e);
        }
    }

    private static DocumentBuilder newBuilder() throws ParserConfigurationException {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        factory.setValidating(false);
        factory.setExpandEntityReferences(false);
        factory.setIgnoringComments(true);
        factory.setCoalescing(true);
        return factory.newDocumentBuilder();
    }
}

Related

1. clone(Document inDoc)
2. cloneAndAppend(Document document, Node node)
3. cloneDocument(Document document)
4. cloneDocument(final Document doc)