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Java > Open Source Codes > org > xmldb > xupdate > lexus > commands > InsertAttribute


1 package org.xmldb.xupdate.lexus.commands;
2
3 /*
4  * The XML:DB Initiative Software License, Version 1.0
5  *
6  *
7  * Copyright (c) 2000-2003 The XML:DB Initiative. All rights
8  * reserved.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  *
14  * 1. Redistributions of source code must retain the above copyright
15  * notice, this list of conditions and the following disclaimer.
16  *
17  * 2. Redistributions in binary form must reproduce the above copyright
18  * notice, this list of conditions and the following disclaimer in
19  * the documentation and/or other materials provided with the
20  * distribution.
21  *
22  * 3. The end-user documentation included with the redistribution,
23  * if any, must include the following acknowledgment:
24  * "This product includes software developed by the
25  * XML:DB Initiative (http://www.xmldb.org/)."
26  * Alternately, this acknowledgment may appear in the software itself,
27  * if and wherever such third-party acknowledgments normally appear.
28  *
29  * 4. The name "XML:DB Initiative" must not be used to endorse or
30  * promote products derived from this software without prior written
31  * permission. For written permission, please contact info@xmldb.org.
32  *
33  * 5. Products derived from this software may not be called "XML:DB",
34  * nor may "XML:DB" appear in their name, without prior written
35  * permission of the XML:DB Initiative.
36  *
37  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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41  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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43  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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48  * SUCH DAMAGE.
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51  * This software consists of voluntary contributions made by many
52  * individuals on behalf of the XML:DB Initiative. For more information
53  * on the XML:DB Initiative, please see <http://www.xmldb.org/>.
54  */
55
56 import org.apache.xml.utils.PrefixResolver;
57 import org.apache.xml.utils.PrefixResolverDefault;
58 import org.w3c.dom.Attr JavaDoc;
59 import org.w3c.dom.Element JavaDoc;
60 import org.w3c.dom.Node JavaDoc;
61
62 /**
63  *
64  * @version $Id: InsertAttribute.java,v 1.8 2003/05/21 08:17:38 jbreedveld Exp $
65  * @author <a HREF="http://www.smb-tec.com">SMB</a>
66  */
67 public class InsertAttribute extends InsertStates {
68
69   /**
70    *
71    */
72   public InsertAttribute() {
73     super();
74   }
75
76
77   /**
78    *
79    */
80   public Node JavaDoc execute(Node JavaDoc contextNode) throws Exception JavaDoc {
81     if (contextNode.getNodeType() != Node.ELEMENT_NODE) {
82       throw new Exception JavaDoc("can not append attribute !");
83     }
84     String JavaDoc namespaceURI = (String JavaDoc) attributes.get("namespace");
85     String JavaDoc qName = (String JavaDoc) attributes.get("name");
86
87     String JavaDoc data = "";
88     // Solved "Append empty atrribute bug" by making data default ""
89 if (!characters.isEmpty()) {
90       data = (String JavaDoc) characters.firstElement();
91     }
92
93     Attr JavaDoc attribute;
94     if (namespaceURI != null && namespaceURI.equals("")) {
95       namespaceURI = null;
96     }
97     attribute = contextNode.getOwnerDocument().createAttributeNS(namespaceURI, qName);
98     attribute.setValue(data);
99     ((Element JavaDoc) contextNode).setAttributeNodeNS(attribute);
100     // now check namespaceURI != null no longer qName.indexOf( ":" )>=0
101 if (namespaceURI != null) {
102       String JavaDoc prefix = attribute.getPrefix();
103       if (prefix == null) {
104         /**
105          * This is the default xmlns="namespace-uri" attribute case.
106          * Look for default xmlns="namespace-uri" attributes in parent elements
107          */
108         if (!hasDefaultNamespace(contextNode, namespaceURI)) {
109           ((Element JavaDoc) contextNode).setAttributeNS("http://www.w3.org/2000/xmlns/",
110                   "xmlns", namespaceURI);
111         }
112       } else {
113         /**
114          * Look for existing namespace declaration with same prefix.
115          * If it exists a namespace declaration doesn't has to be added
116          * If it exists but the URI is not the same a namespace
117          * declaration has to be added
118          *
119          * Other prefixes with same URI are ignored. This is something to
120          * talk about on mailinglist and a to WD
121          */
122         PrefixResolver prefixResolver = new PrefixResolverDefault(contextNode);
123         String JavaDoc uri = prefixResolver.getNamespaceForPrefix(prefix);
124         if (uri == null || !uri.equalsIgnoreCase(namespaceURI)) {
125           ((Element JavaDoc) contextNode).setAttributeNS("http://www.w3.org/2000/xmlns/",
126                   "xmlns:" + prefix, namespaceURI);
127         }
128       }
129     }
130     return attribute;
131   }
132 }
133
134
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