Java XML Node Remove removeWhitespaceNodes(Node e)

Description

remove Whitespace Nodes

License

Open Source License

Declaration

private static void removeWhitespaceNodes(Node e) 

Method Source Code

//package com.java2s;
/*//from   www . ja v a2 s.c  o  m
* ? Copyright IBM Corp. 2011, 2014
* 
* 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.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Text;

public class Main {
    private static void removeWhitespaceNodes(Node e) {
        // called after have read-in the nodes. 
        // Later the nodeToString method will be used to 
        // convert the node to string, while attempting to format with 2-space indent.
        // But if the tree already contains whitespace characters then it won't do the indent formatting,
        // and you end up with a mix of tabs, 2-space and 4-space indenting.
        // So removing the source-file indentation whitespace here, so can do consistent 2-space indent.
        NodeList kids = e.getChildNodes();
        int i = 0;
        while (i < kids.getLength()) {
            Node kid = kids.item(i);
            if (kid.getNodeType() == Node.TEXT_NODE && ((Text) kid).getTextContent().trim().isEmpty()) {
                e.removeChild(kid);
            } else {
                if (kid.getNodeType() == Node.ELEMENT_NODE) {
                    removeWhitespaceNodes(kid);
                }
                i++;
            }
        }
    }
}

Related

1. removeUndesiredContent(Node node)
2. removeUserData(Node node, String key)
3. removeValue(NamedNodeMap values, String name)
4. removeWhitespace(Node node, boolean deep)
5. removeWhitespace(Node parent)
6. removeWhitespaceNodes(org.w3c.dom.Element e)
7. removeWhitespaceTextNodes(Element parent)