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1   /*
2    * Copyright 2001-2005 (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   
8   package org.dom4j.datatype;
9   
10  import com.sun.msv.datatype.DatabindableDatatype;
11  import com.sun.msv.datatype.SerializationContext;
12  import com.sun.msv.datatype.xsd.XSDatatype;
13  
14  import org.dom4j.Element;
15  import org.dom4j.Namespace;
16  import org.dom4j.QName;
17  import org.dom4j.tree.AbstractAttribute;
18  
19  import org.relaxng.datatype.DatatypeException;
20  import org.relaxng.datatype.ValidationContext;
21  
22  /***
23   * <p>
24   * <code>DatatypeAttribute</code> represents an Attribute which supports the
25   * <a href="http://www.w3.org/TR/xmlschema-2/">XML Schema Data Types </a>
26   * specification.
27   * </p>
28   * 
29   * @author <a href="mailto:jstrachan@apache.org">James Strachan </a>
30   * @version $Revision: 1.9 $
31   */
32  public class DatatypeAttribute extends AbstractAttribute implements
33          SerializationContext, ValidationContext {
34      /*** The parent <code>Element</code> of the <code>Attribute</code> */
35      private Element parent;
36  
37      /*** The <code>QName</code> for this element */
38      private QName qname;
39  
40      /*** The <code>XSDatatype</code> of the <code>Attribute</code> */
41      private XSDatatype datatype;
42  
43      /*** The data (Object) value of the <code>Attribute</code> */
44      private Object data;
45  
46      /*** The text value of the <code>Attribute</code> */
47      private String text;
48  
49      public DatatypeAttribute(QName qname, XSDatatype datatype) {
50          this.qname = qname;
51          this.datatype = datatype;
52      }
53  
54      public DatatypeAttribute(QName qname, XSDatatype datatype, String text) {
55          this.qname = qname;
56          this.datatype = datatype;
57          this.text = text;
58          this.data = convertToValue(text);
59      }
60  
61      public String toString() {
62          return getClass().getName() + hashCode() + " [Attribute: name "
63                  + getQualifiedName() + " value \"" + getValue() + "\" data: "
64                  + getData() + "]";
65      }
66  
67      /***
68       * Returns the MSV XSDatatype for this node
69       * 
70       * @return DOCUMENT ME!
71       */
72      public XSDatatype getXSDatatype() {
73          return datatype;
74      }
75  
76      // SerializationContext interface
77      // -------------------------------------------------------------------------
78      public String getNamespacePrefix(String uri) {
79          Element parentElement = getParent();
80  
81          if (parentElement != null) {
82              Namespace namespace = parentElement.getNamespaceForURI(uri);
83  
84              if (namespace != null) {
85                  return namespace.getPrefix();
86              }
87          }
88  
89          return null;
90      }
91  
92      // ValidationContext interface
93      // -------------------------------------------------------------------------
94      public String getBaseUri() {
95          // XXXX: could we use a Document for this?
96          return null;
97      }
98  
99      public boolean isNotation(String notationName) {
100         // XXXX: no way to do this yet in dom4j so assume false
101         return false;
102     }
103 
104     public boolean isUnparsedEntity(String entityName) {
105         // XXXX: no way to do this yet in dom4j so assume valid
106         return true;
107     }
108 
109     public String resolveNamespacePrefix(String prefix) {
110         // first lets see if this is our attribute's prefix
111         if (prefix.equals(getNamespacePrefix())) {
112             return getNamespaceURI();
113         } else {
114             Element parentElement = getParent();
115 
116             if (parentElement != null) {
117                 Namespace namespace = parentElement
118                         .getNamespaceForPrefix(prefix);
119 
120                 if (namespace != null) {
121                     return namespace.getURI();
122                 }
123             }
124         }
125 
126         return null;
127     }
128 
129     // Attribute interface
130     // -------------------------------------------------------------------------
131     public QName getQName() {
132         return qname;
133     }
134 
135     public String getValue() {
136         return text;
137     }
138 
139     public void setValue(String value) {
140         validate(value);
141 
142         this.text = value;
143         this.data = convertToValue(value);
144     }
145 
146     public Object getData() {
147         return data;
148     }
149 
150     public void setData(Object data) {
151         String s = datatype.convertToLexicalValue(data, this);
152         validate(s);
153         this.text = s;
154         this.data = data;
155     }
156 
157     public Element getParent() {
158         return parent;
159     }
160 
161     public void setParent(Element parent) {
162         this.parent = parent;
163     }
164 
165     public boolean supportsParent() {
166         return true;
167     }
168 
169     public boolean isReadOnly() {
170         return false;
171     }
172 
173     // Implementation methods
174     // -------------------------------------------------------------------------
175     protected void validate(String txt) throws IllegalArgumentException {
176         try {
177             datatype.checkValid(txt, this);
178         } catch (DatatypeException e) {
179             throw new IllegalArgumentException(e.getMessage());
180         }
181     }
182 
183     protected Object convertToValue(String txt) {
184         if (datatype instanceof DatabindableDatatype) {
185             DatabindableDatatype bindable = (DatabindableDatatype) datatype;
186 
187             return bindable.createJavaObject(txt, this);
188         } else {
189             return datatype.createValue(txt, this);
190         }
191     }
192 }
193 
194 /*
195  * Redistribution and use of this software and associated documentation
196  * ("Software"), with or without modification, are permitted provided that the
197  * following conditions are met:
198  * 
199  * 1. Redistributions of source code must retain copyright statements and
200  * notices. Redistributions must also contain a copy of this document.
201  * 
202  * 2. Redistributions in binary form must reproduce the above copyright notice,
203  * this list of conditions and the following disclaimer in the documentation
204  * and/or other materials provided with the distribution.
205  * 
206  * 3. The name "DOM4J" must not be used to endorse or promote products derived
207  * from this Software without prior written permission of MetaStuff, Ltd. For
208  * written permission, please contact dom4j-info@metastuff.com.
209  * 
210  * 4. Products derived from this Software may not be called "DOM4J" nor may
211  * "DOM4J" appear in their names without prior written permission of MetaStuff,
212  * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
213  * 
214  * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
215  * 
216  * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
217  * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
218  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
219  * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
220  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
221  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
222  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
223  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
224  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
225  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
226  * POSSIBILITY OF SUCH DAMAGE.
227  * 
228  * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
229  */