Java XML Node to String nodeToString(Object node)

Description

node To String

License

Open Source License

Declaration

public static String nodeToString(Object node) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2014 Gabriel Skantze./*from ww  w  . ja  v a  2  s .c  o m*/
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     Gabriel Skantze - initial API and implementation
 ******************************************************************************/

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.w3c.dom.Attr;

import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.Text;

public class Main {
    public static String nodeToString(Object node) {
        String result = "";
        if (node instanceof String) {
            String str = ((String) node).replaceAll("\\s+", " ").trim();
            result += str;
        } else if (node instanceof Text) {
            String str = ((Text) node).getTextContent()
                    .replaceAll("\\s+", " ").trim();
            result += str;
        } else if (node instanceof Element) {
            Element elem = (Element) node;
            Set namespaces = collectNamespaces(elem);
            result += "<" + elem.getTagName();
            for (int j = 0; j < elem.getAttributes().getLength(); j++) {
                Attr attr = (Attr) elem.getAttributes().item(j);
                if (attr.getNamespaceURI() != null
                        && attr.getNamespaceURI().equals(
                                "http://www.w3.org/2000/xmlns/")
                        && !namespaces.contains(attr.getValue()))
                    continue;
                result += " " + attr.getName() + "=\"" + attr.getValue()
                        + "\"";
            }
            if (elem.getChildNodes().getLength() == 0) {
                result += "/>";
            } else {
                result += ">";
                ArrayList<Object> children = new ArrayList<Object>();
                for (int i = 0; i < elem.getChildNodes().getLength(); i++) {
                    children.add(elem.getChildNodes().item(i));
                }
                result += nodesToString(children);
                result += "</" + elem.getTagName() + ">";
            }
        }
        return result;
    }

    public static Set<String> collectNamespaces(Element elem) {
        Set<String> set = new HashSet<String>();
        collectNamespaces(elem, set);
        return set;
    }

    private static void collectNamespaces(Element elem, Set set) {
        if (elem.getNamespaceURI() != null) {
            set.add(elem.getNamespaceURI());
        }
        for (int j = 0; j < elem.getAttributes().getLength(); j++) {
            Attr attr = (Attr) elem.getAttributes().item(j);
            if (attr.getNamespaceURI() != null) {
                set.add(attr.getNamespaceURI());
            }
        }
        for (int i = 0; i < elem.getChildNodes().getLength(); i++) {
            Node child = elem.getChildNodes().item(i);
            if (child instanceof Element) {
                collectNamespaces((Element) child, set);
            }
        }
    }

    public static String nodesToString(List<Object> nodes) {
        String result = "";
        for (Object node : nodes) {
            result += nodeToString(node);
        }
        return result;
    }
}

Related

1. nodeToString(Node node)
2. nodeToString(Node node, boolean pretty)
3. nodeToString(Node node, Set parentPrefixes, String namespaceURI)
4. nodeToString(Node node, StringBuffer buf)
5. nodeToString(Node node, StringBuffer sb)
6. nodeToString(org.w3c.dom.Node domNode)
7. nodeToText(Node node)
8. nodeToWriter(Node node, Writer writer)
9. nodeToXmlString(Node node)