Java XML Node Save writeNode(Node n, Writer w)

Description

Writes a node using the given writer.

License

Apache License

Declaration

public static void writeNode(Node n, Writer w) throws IOException 

Method Source Code

//package com.java2s;
/*//from ww w . java  2s .c o  m
    
   Copyright 2000-2001,2003  The Apache Software Foundation 
    
   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at
    
   http://www.apache.org/licenses/LICENSE-2.0
    
   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
    
 */

import java.io.IOException;
import java.io.Writer;
import org.w3c.dom.Attr;

import org.w3c.dom.DocumentType;

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

public class Main {
    /**
     * Writes a node using the given writer.
     */
    public static void writeNode(Node n, Writer w) throws IOException {
        switch (n.getNodeType()) {
        case Node.ELEMENT_NODE:
            w.write("<");
            w.write(n.getNodeName());

            if (n.hasAttributes()) {
                NamedNodeMap attr = n.getAttributes();
                int len = attr.getLength();
                for (int i = 0; i < len; i++) {
                    Attr a = (Attr) attr.item(i);
                    w.write(" ");
                    w.write(a.getNodeName());
                    w.write("=\"");
                    w.write(contentToString(a.getNodeValue()));
                    w.write("\"");
                }
            }

            Node c = n.getFirstChild();
            if (c != null) {
                w.write(">");
                for (; c != null; c = c.getNextSibling()) {
                    writeNode(c, w);
                }
                w.write("</");
                w.write(n.getNodeName());
                w.write(">");
            } else {
                w.write("/>");
            }
            break;
        case Node.TEXT_NODE:
            w.write(contentToString(n.getNodeValue()));
            break;
        case Node.CDATA_SECTION_NODE:
            w.write("<![CDATA[");
            w.write(n.getNodeValue());
            w.write("]]>");
            break;
        case Node.ENTITY_REFERENCE_NODE:
            w.write("&");
            w.write(n.getNodeName());
            w.write(";");
            break;
        case Node.PROCESSING_INSTRUCTION_NODE:
            w.write("<?");
            w.write(n.getNodeName());
            // TD: Bug #19392
            w.write(" ");
            w.write(n.getNodeValue());
            w.write("?>");
            break;
        case Node.COMMENT_NODE:
            w.write("<!--");
            w.write(n.getNodeValue());
            w.write("-->");
            break;
        case Node.DOCUMENT_TYPE_NODE: {
            DocumentType dt = (DocumentType) n;
            w.write("<!DOCTYPE ");
            w.write(n.getOwnerDocument().getDocumentElement().getNodeName());
            String pubID = dt.getPublicId();
            if (pubID != null) {
                w.write(" PUBLIC \"" + dt.getNodeName() + "\" \"" + pubID + "\">");
            } else {
                String sysID = dt.getSystemId();
                if (sysID != null)
                    w.write(" SYSTEM \"" + sysID + "\">");
            }
        }
            break;
        default:
            throw new Error("Internal error (" + n.getNodeType() + ")");
        }
    }

    /**
     * Returns the given content value transformed to replace invalid
     * characters with entities.
     */
    public static String contentToString(String s) {
        StringBuffer result = new StringBuffer();

        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);

            switch (c) {
            case '<':
                result.append("&lt;");
                break;
            case '>':
                result.append("&gt;");
                break;
            case '&':
                result.append("&amp;");
                break;
            case '"':
                result.append("&quot;");
                break;
            case '\'':
                result.append("&apos;");
                break;
            default:
                result.append(c);
            }
        }

        return result.toString();
    }
}

Related

1. write(Node node, Writer out)
2. writeByDom(Node node, Writer writer, int indent)
3. writeDescription(PrintWriter out, Node node, String offSet)
4. writeDOM(Node node, PrintWriter writer)
5. writeNode(Node n, FileOutputStream o)
6. writeNode(Node node, OutputStream os, boolean formatted)
7. writeNode(Node node, OutputStream output, Map serializerParams)
8. writeNode(PrintWriter w, Node node, int depth)
9. writeToStream(OutputStream os, Node node)