Java XML Node Format printTree(Writer ps, Node node, String indent, String lineSeparator)

Description

Print the tree of a node.

License

Open Source License

Parameter

Parameter	Description
ps	The writer to where the XML document is written
node	The node with which to start the printing
indent	A string that is printed on each line before any XML
lineSeparator	The string written at the end of each line

Declaration

private static void printTree(Writer ps, Node node, String indent, String lineSeparator) throws IOException 

Method Source Code

//package com.java2s;
/* //from  w ww  .  j a  v a 2s  .c o m
 * Copyright (C) 2016 Bruce Beisel
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.io.Writer;
import java.io.IOException;

import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.NamedNodeMap;

public class Main {
    /**
     * Print the tree of a node. This method is recursive.
     *
     * @param ps  The writer to where the XML document is written
     * @param node The node with which to start the printing
     * @param indent A string that is printed on each line before any XML
     * @param lineSeparator The string written at the end of each line
     */
    private static void printTree(Writer ps, Node node, String indent, String lineSeparator) throws IOException {
        switch (node.getNodeType()) {
        case Node.DOCUMENT_NODE:

            NodeList nodes = node.getChildNodes();

            if (nodes != null) {
                for (int i = 0; i < nodes.getLength(); i++) {
                    printTree(ps, nodes.item(i), "", lineSeparator);
                }
            }
            break;

        case Node.ELEMENT_NODE:
            //
            // Print element and atributes
            //
            String name = node.getNodeName();
            ps.write(indent);
            ps.write("<");
            ps.write(name);

            //
            // Print attributes
            //
            NamedNodeMap attributes = node.getAttributes();

            for (int i = 0; i < attributes.getLength(); i++) {
                Node current = attributes.item(i);
                ps.write(" ");
                ps.write(current.getNodeName());
                ps.write("=\"");
                ps.write(current.getNodeValue());
                ps.write("\"");
            }

            //
            // Recurse on each child
            //
            NodeList children = node.getChildNodes();

            if (children != null) {
                ps.write(">");
                ps.write(lineSeparator);

                for (int i = 0; i < children.getLength(); i++)
                    printTree(ps, children.item(i), indent + "  ", lineSeparator);

                ps.write(indent);
                ps.write("</");
                ps.write(name);
                ps.write(">");
                ps.write(lineSeparator);
            } else {
                ps.write("/>");
                ps.write(lineSeparator);
            }

            break;

        case Node.CDATA_SECTION_NODE:
            ps.write(indent);
            ps.write("<![CDATA[");
            ps.write(node.getNodeValue());
            ps.write("]]>");
            ps.write(lineSeparator);
            break;

        case Node.TEXT_NODE:
            String text = node.getNodeValue().trim();

            if (text.length() > 0) {
                ps.write(indent);
                ps.write(text);
                ps.write(lineSeparator);
            }
            break;

        case Node.PROCESSING_INSTRUCTION_NODE:
            break;

        case Node.ENTITY_REFERENCE_NODE:
            break;

        case Node.DOCUMENT_TYPE_NODE:
            break;

        default:
            break;
        }
    }
}

Related

1. formatNode(Node node, int indent, StringBuffer stringBuffer)
2. print(PrintStream out, Node node)
3. printNode(StringBuffer sBuffer, Node node)
4. renderNode(StringBuffer sb, Node node)
5. renderNode(StringBuffer sb, Node node, String margin, String indent, String lab, String rab, String nl)