View Javadoc

1   /*
2    * Copyright 2001-2004 (C) MetaStuff, Ltd. All Rights Reserved.
3    * 
4    * This software is open source. 
5    * See the bottom of this file for the licence.
6    * 
7    * $Id: DatatypeElement.java,v 1.7 2004/06/25 08:03:34 maartenc Exp $
8    */
9   
10  package org.dom4j.datatype;
11  
12  import com.sun.msv.datatype.DatabindableDatatype;
13  import com.sun.msv.datatype.SerializationContext;
14  import com.sun.msv.datatype.xsd.XSDatatype;
15  
16  import org.dom4j.Element;
17  import org.dom4j.Namespace;
18  import org.dom4j.Node;
19  import org.dom4j.QName;
20  import org.dom4j.tree.DefaultElement;
21  import org.relaxng.datatype.DatatypeException;
22  import org.relaxng.datatype.ValidationContext;
23  
24  /*** <p><code>DatatypeElement</code> represents an Element which supports the
25    * <a href="http://www.w3.org/TR/xmlschema-2/">XML Schema Data Types</a>
26    * specification.</p>
27    *
28    * @author <a href="mailto:james.strachan@metastuff.com">James Strachan</a>
29    * @version $Revision: 1.7 $
30    */
31  public class DatatypeElement extends DefaultElement implements SerializationContext, ValidationContext {
32  
33      /*** The <code>XSDatatype</code> of the <code>Attribute</code> */
34      private XSDatatype datatype;
35      
36      /*** The data (Object) value of the <code>Attribute</code> */
37      private Object data;
38  
39  
40      
41      public DatatypeElement(QName qname,XSDatatype datatype) {
42          super(qname);
43          this.datatype = datatype;
44      }
45  
46      public DatatypeElement(QName qname,int attributeCount,XSDatatype datatype) { 
47          super(qname, attributeCount);
48          this.datatype = datatype;
49      }
50  
51      public String toString() {
52          return getClass().getName() + hashCode() 
53              + " [Element: <" + getQualifiedName() 
54              + " attributes: " + attributeList() 
55              + " data: " + getData() + " />]";
56      }
57      
58      /*** Returns the MSV XSDatatype for this node */
59      public XSDatatype getXSDatatype() {
60          return datatype;
61      }
62      
63      // SerializationContext interface
64      //-------------------------------------------------------------------------  
65      public String getNamespacePrefix(String uri) {
66          Namespace namespace = getNamespaceForURI(uri);
67          return (namespace != null) ? namespace.getPrefix() : null;
68      }
69      
70      // ValidationContext interface
71      //-------------------------------------------------------------------------    
72      public String getBaseUri() {
73          // XXXX: could we use a Document for this?
74          return null;
75      }
76      
77      public boolean isNotation(String notationName) {
78          // XXXX: no way to do this yet in dom4j so assume false
79          return false;
80      }
81          
82      public boolean isUnparsedEntity(String entityName) {
83          // XXXX: no way to do this yet in dom4j so assume valid
84          return true;
85      }
86      
87      public String resolveNamespacePrefix(String prefix) {
88          Namespace namespace = getNamespaceForPrefix( prefix );
89          if ( namespace != null ) {
90              return namespace.getURI();
91          }
92          return null;
93      }
94      
95      
96      // Element interface
97      //-------------------------------------------------------------------------
98      public Object getData() {
99          if ( data == null ) {
100             String text = getTextTrim();
101             if ( text != null && text.length() > 0 ) {
102                 if ( datatype instanceof DatabindableDatatype ) {
103                     DatabindableDatatype bindable = (DatabindableDatatype) datatype;
104                     data = bindable.createJavaObject( text, this );
105                 }
106                 else {
107                     data = datatype.createValue( text, this );
108                 }
109             }
110         }
111         return data;
112     }
113     
114     public void setData(Object data) {
115         String s = datatype.convertToLexicalValue( data, this );
116         validate(s);
117         this.data = data;
118         setText( s );
119     }    
120 
121     public Element addText(String text) {
122         validate(text);
123         return super.addText(text);
124     }
125     
126     public void setText(String text) {
127         validate(text);
128         super.setText(text);
129     }
130     // Implementation methods
131     //-------------------------------------------------------------------------    
132     /*** Override to force lazy recreation of data object */
133     protected void childAdded(Node node) {
134         data = null;
135         super.childAdded(node);
136     }
137     
138     /*** Override to force lazy recreation of data object */    
139     protected void childRemoved(Node node) {
140         data = null;
141         super.childRemoved(node);
142     }
143 
144     protected void validate(String text) throws IllegalArgumentException {
145         try {
146             datatype.checkValid(text, this);
147         }
148         catch (DatatypeException e) {
149             throw new IllegalArgumentException( e.getMessage() );
150         }
151     }
152 }
153 
154 
155 
156 
157 /*
158  * Redistribution and use of this software and associated documentation
159  * ("Software"), with or without modification, are permitted provided
160  * that the following conditions are met:
161  *
162  * 1. Redistributions of source code must retain copyright
163  *    statements and notices.  Redistributions must also contain a
164  *    copy of this document.
165  *
166  * 2. Redistributions in binary form must reproduce the
167  *    above copyright notice, this list of conditions and the
168  *    following disclaimer in the documentation and/or other
169  *    materials provided with the distribution.
170  *
171  * 3. The name "DOM4J" must not be used to endorse or promote
172  *    products derived from this Software without prior written
173  *    permission of MetaStuff, Ltd.  For written permission,
174  *    please contact dom4j-info@metastuff.com.
175  *
176  * 4. Products derived from this Software may not be called "DOM4J"
177  *    nor may "DOM4J" appear in their names without prior written
178  *    permission of MetaStuff, Ltd. DOM4J is a registered
179  *    trademark of MetaStuff, Ltd.
180  *
181  * 5. Due credit should be given to the DOM4J Project - 
182  *    http://www.dom4j.org
183  *
184  * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS
185  * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
186  * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
187  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
188  * METASTUFF, LTD. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
189  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
190  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
191  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
192  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
193  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
194  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
195  * OF THE POSSIBILITY OF SUCH DAMAGE.
196  *
197  * Copyright 2001-2004 (C) MetaStuff, Ltd. All Rights Reserved.
198  *
199  * $Id: DatatypeElement.java,v 1.7 2004/06/25 08:03:34 maartenc Exp $
200  */