Android XML Node to String Convert elementToString(Node n)

Description

element To String

License

Apache License

Declaration

public static String elementToString(Node n) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright 2012 Philippe PRADOS /*from  w w  w . j  a v  a2 s .c  o  m*/
 * 
 * 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 org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class Main {
    public static String elementToString(Node n) {

        String name = n.getNodeName();

        short type = n.getNodeType();

        if (Node.CDATA_SECTION_NODE == type) {
            return "<![CDATA[" + n.getNodeValue() + "]]&gt;";
        }

        if (name.length() > 0 && name.charAt(0) == '#') {
            return "";
        }

        StringBuilder sb = new StringBuilder();
        sb.append('<').append(name);

        NamedNodeMap attrs = n.getAttributes();
        if (attrs != null) {
            for (int i = 0; i < attrs.getLength(); i++) {
                Node attr = attrs.item(i);
                sb.append(' ').append(attr.getNodeName()).append("=\"")
                        .append(encodeXML(attr.getNodeValue()))
                        .append('\"');
            }
        }

        String textContent = null;
        NodeList children = n.getChildNodes();

        if (children.getLength() == 0) {
            if ((textContent = getTextContent(n)) != null
                    && !"".equals(textContent)) {
                sb.append(encodeXML(textContent)).append("</").append(name)
                        .append('>');
            } else {
                sb.append("/>").append('\n');
            }
        } else {
            sb.append('>').append('\n');
            boolean hasValidChildren = false;
            for (int i = 0; i < children.getLength(); i++) {
                String childToString = elementToString(children.item(i));
                if (!"".equals(childToString)) {
                    sb.append(childToString);
                    hasValidChildren = true;
                }
            }

            if (!hasValidChildren
                    && ((textContent = getTextContent(n)) != null)) {
                sb.append(encodeXML(textContent));
            }

            sb.append("</").append(name).append('>');
        }

        return sb.toString();
    }

    private static String encodeXML(final String str) {
        final int max = str.length();
        final StringBuffer buf = new StringBuffer(max + 10);
        for (int i = 0; i < max; ++i)// NOPMD
        {
            final char c = str.charAt(i);
            switch (c) {
            case '&':
                buf.append("&amp;");
                break;
            case '<':
                buf.append("&lt;");
                break;
            case '>':
                buf.append("&gt;");
                break;
            case '"':
                buf.append("&quot;");
                break;
            case '\'':
                buf.append("&apos;");
                break;
            default:
                buf.append(c);
            }
        }
        return buf.toString();
    }

    /**
     * return the text content of an element
     */
    private static String getTextContent(org.w3c.dom.Node element) {
        StringBuffer childtext = new StringBuffer();
        NodeList childlist = element.getChildNodes();
        int ct = childlist.getLength();

        for (int j = 0; j < ct; j++) {
            org.w3c.dom.Node childNode = childlist.item(j);

            if ((childNode.getNodeType() == Node.TEXT_NODE)
                    || (childNode.getNodeType() == Node.CDATA_SECTION_NODE)) {
                childtext.append(childNode.getNodeValue().trim());
            }
        }

        return childtext.toString();
    }
}

Related

1. getStrFromNode(Node xpathnode)