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


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
40  * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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,
46  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48  * SUCH DAMAGE.
49  * ====================================================================
50  *
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.w3c.dom.Attr JavaDoc;
57 import org.w3c.dom.Element JavaDoc;
58 import org.w3c.dom.Node JavaDoc;
59
60 /**
61  *
62  * @version $Id: RemoveCommand.java,v 1.3 2003/05/21 08:17:38 jbreedveld Exp $
63  * @author <a HREF="http://www.smb-tec.com">SMB</a>
64  */
65 public class RemoveCommand extends CommandObject {
66
67
68   /**
69    *
70    */
71   public RemoveCommand(Node JavaDoc contextNode) throws Exception JavaDoc {
72     super(contextNode);
73   }
74
75
76   /**
77    *
78    */
79   public boolean submitInstruction(int instruction) {
80     //does nothing
81 return false;
82   }
83
84
85   /**
86    *
87    */
88   public boolean executeInstruction() {
89     //does nothing
90 return false;
91   }
92
93
94   /**
95    *
96    */
97   public Node JavaDoc execute() throws Exception JavaDoc {
98     String JavaDoc selection = (String JavaDoc) attributes.get("select");
99     selectNodes(selection);
100
101     int selectionLength = selectionNodeList.getLength();
102     for (int i = 0; i < selectionLength; i++) {
103       Node JavaDoc current = selectionNodeList.item(i);
104       Node JavaDoc parent;
105       switch (current.getNodeType()) {
106         case Node.ATTRIBUTE_NODE:
107           parent = ((Attr JavaDoc) current).getOwnerElement();
108           ((Element JavaDoc) parent).removeAttribute(current.getNodeName());
109           break;
110         default:
111           parent = current.getParentNode();
112           parent.removeChild(current);
113       }
114     }
115     return contextNode;
116   }
117 }
118
119
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