| Stuart McCulloch | bb8b9fa | 2008-02-17 16:07:14 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
| 3 | * or more contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. The ASF licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| Stuart McCulloch | c792b37 | 2008-02-17 16:12:24 +0000 | [diff] [blame] | 19 | package org.apache.felix.obrplugin; |
| Stuart McCulloch | bb8b9fa | 2008-02-17 16:07:14 +0000 | [diff] [blame] | 20 | |
| 21 | |
| 22 | import org.w3c.dom.Node; |
| 23 | import org.w3c.dom.NodeList; |
| 24 | |
| 25 | |
| 26 | /** |
| 27 | * Provide XML helper methods to support pre-Java5 runtimes |
| 28 | * |
| 29 | * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> |
| 30 | */ |
| 31 | public class XmlHelper |
| 32 | { |
| 33 | /** |
| 34 | * based on public Java5 javadoc of org.w3c.dom.Node.getTextContent method |
| 35 | */ |
| 36 | public static String getTextContent( Node node ) |
| 37 | { |
| 38 | switch ( node.getNodeType() ) |
| 39 | { |
| 40 | case Node.ELEMENT_NODE: |
| 41 | case Node.ATTRIBUTE_NODE: |
| 42 | case Node.ENTITY_NODE: |
| 43 | case Node.ENTITY_REFERENCE_NODE: |
| 44 | case Node.DOCUMENT_FRAGMENT_NODE: |
| 45 | return mergeTextContent( node.getChildNodes() ); |
| 46 | case Node.TEXT_NODE: |
| 47 | case Node.CDATA_SECTION_NODE: |
| 48 | case Node.COMMENT_NODE: |
| 49 | case Node.PROCESSING_INSTRUCTION_NODE: |
| 50 | return node.getNodeValue(); |
| 51 | case Node.DOCUMENT_NODE: |
| 52 | case Node.DOCUMENT_TYPE_NODE: |
| 53 | case Node.NOTATION_NODE: |
| 54 | default: |
| 55 | return null; |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | |
| 60 | /** |
| 61 | * based on the following quote from public Java5 javadoc of org.w3c.dom.Node.getTextContent method: |
| 62 | * |
| 63 | * "concatenation of the textContent attribute value of every child node, excluding COMMENT_NODE and |
| 64 | * PROCESSING_INSTRUCTION_NODE nodes. This is the empty string if the node has no children" |
| 65 | */ |
| 66 | private static String mergeTextContent( NodeList nodes ) |
| 67 | { |
| 68 | StringBuffer buf = new StringBuffer(); |
| 69 | for ( int i = 0; i < nodes.getLength(); i++ ) |
| 70 | { |
| 71 | Node n = nodes.item( i ); |
| 72 | final String text; |
| 73 | |
| 74 | switch ( n.getNodeType() ) |
| 75 | { |
| 76 | case Node.COMMENT_NODE: |
| 77 | case Node.PROCESSING_INSTRUCTION_NODE: |
| 78 | text = null; |
| 79 | break; |
| 80 | default: |
| 81 | text = getTextContent( n ); |
| 82 | break; |
| 83 | } |
| 84 | |
| 85 | if ( text != null ) |
| 86 | { |
| 87 | buf.append( text ); |
| 88 | } |
| 89 | } |
| 90 | return buf.toString(); |
| 91 | } |
| 92 | |
| 93 | |
| 94 | /** |
| 95 | * based on public Java5 javadoc of org.w3c.dom.Node.setTextContent method |
| 96 | */ |
| 97 | public static void setTextContent( Node node, final String text ) |
| 98 | { |
| 99 | while ( node.hasChildNodes() ) |
| 100 | { |
| 101 | node.removeChild( node.getFirstChild() ); |
| 102 | } |
| 103 | |
| 104 | if ( text != null && text.length() > 0 ) |
| 105 | { |
| 106 | Node textNode = node.getOwnerDocument().createTextNode( text ); |
| 107 | node.appendChild( textNode ); |
| 108 | } |
| 109 | } |
| 110 | } |