Android XML Element Child Get printChildElements(Element root, PrintStream out, boolean recurse, String prefix)

Description

Whenever you'd need to print a configuration node and/or its children.

License

LGPL

Parameter

Parameter	Description
root	the root node to print.
out	the print stream that should be used to outpu
recurse	boolean
prefix	String

Declaration

public static void printChildElements(Element root, PrintStream out,
        boolean recurse, String prefix) 

Method Source Code

//package com.java2s;
/*//www .j  ava2 s.c om
 * Jitsi, the OpenSource Java VoIP and Instant Messaging client.
 *
 * Distributable under LGPL license.
 * See terms of license at gnu.org.
 */

import java.io.*;

import org.w3c.dom.*;

public class Main {
    /**
     * Whenever you'd need to print a configuration node and/or its children.
     *
     * @param root the root node to print.
     * @param out the print stream that should be used to outpu
     * @param recurse boolean
     * @param prefix String
     */
    public static void printChildElements(Element root, PrintStream out,
            boolean recurse, String prefix) {
        out.print(prefix + "<" + root.getNodeName());
        NamedNodeMap attrs = root.getAttributes();
        Node node;
        for (int i = 0; i < attrs.getLength(); i++) {
            node = attrs.item(i);
            out.print(" " + node.getNodeName() + "=\""
                    + node.getNodeValue() + "\"");
        }
        out.println(">");

        String data = getText(root);
        if (data != null && data.trim().length() > 0)
            out.println(prefix + "\t" + data);

        data = getCData(root);
        if (data != null && data.trim().length() > 0)
            out.println(prefix + "\t<![CDATA[" + data + "]]>");

        NodeList nodes = root.getChildNodes();
        for (int i = 0; i < nodes.getLength(); i++) {
            node = nodes.item(i);
            if (node.getNodeType() == Node.ELEMENT_NODE) {
                if (recurse)
                    printChildElements((Element) node, out, recurse, prefix
                            + "\t");
                else
                    out.println(prefix + node.getNodeName());
            }
        }

        out.println(prefix + "</" + root.getNodeName() + ">");
    }

    /**
     * Extracts the String content of a TXT element.
     *
     * @param parentNode the node containing the data that we'd like to get.
     * @return the string contained by the node or null if none existed.
     */
    public static String getText(Element parentNode) {
        Text text = getTextNode(parentNode);

        return (text == null) ? null : text.getData();
    }

    /**
     * Extract the CDATA content of the specified element.
     * @param element the element whose data we need
     * @return a String containing the CDATA value of element.
     */
    public static String getCData(Element element) {
        CDATASection text = getCDataNode(element);

        return (text == null) ? null : text.getData().trim();
    }

    /**
     * Returns element's TEXT child node (if it has one).
     * @param element the element whose TEXT we need to get.
     * @return a <tt>Text</tt> object containing the specified element's
     * text content.
     */
    public static Text getTextNode(Element element) {
        return (Text) getChildByType(element, Node.TEXT_NODE);
    }

    /**
     * Returns element's CDATA child node (if it has one).
     * @param element the element whose CDATA we need to get.
     * @return a CDATASection object containing the specified element's CDATA
     * content
     */
    public static CDATASection getCDataNode(Element element) {
        return (CDATASection) getChildByType(element,
                Node.CDATA_SECTION_NODE);
    }

    /**
     * Returns first of the <tt>element</tt>'s child nodes that is of type
     * <tt>nodeType</tt>.
     * @param element the element whose child we need.
     * @param nodeType the type of the child we need.
     * @return a child of the specified <tt>nodeType</tt> or null if none
     * was found.
     */
    public static Node getChildByType(Element element, short nodeType) {
        if (element == null)
            return null;

        NodeList nodes = element.getChildNodes();
        if (nodes == null || nodes.getLength() < 1)
            return null;

        Node node;
        String data;
        for (int i = 0; i < nodes.getLength(); i++) {
            node = nodes.item(i);
            short type = node.getNodeType();
            if (type == nodeType) {
                if (type == Node.TEXT_NODE
                        || type == Node.CDATA_SECTION_NODE) {
                    data = ((Text) node).getData();
                    if (data == null || data.trim().length() < 1)
                        continue;
                }

                return node;
            }
        }

        return null;
    }
}

Related

1. getChild(Element element, String name)
2. getChildByType(Element element, short nodeType)
3. getChildElementByName(Element parent, String name)
4. getChildValue(Element element, String name)
5. getFullTextChildrenFromElement(Element element)
6. valueOfFirstChildWithName(Element element, String name)
7. attributeOfFirstChildWithName(Element element, String name, String attribute)
8. childrenWithName(Element e, String name)
9. getCDataNode(Element element)