DatatypeElement xref

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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.Node;
    17  import org.dom4j.QName;
    18  import org.dom4j.tree.DefaultElement;
    19
    20  import org.relaxng.datatype.DatatypeException;
    21  import org.relaxng.datatype.ValidationContext;
    22
    23  /***
    24   * <p>
    25   * <code>DatatypeElement</code> represents an Element which supports the <a
    26   * href="http://www.w3.org/TR/xmlschema-2/">XML Schema Data Types </a>
    27   * specification.
    28   * </p>
    29   *
    30   * @author <a href="mailto:james.strachan@metastuff.com">James Strachan </a>
    31   * @version $Revision: 1.9 $
    32   */
    33  public class DatatypeElement extends DefaultElement implements
    34          SerializationContext, ValidationContext {
    35      /*** The <code>XSDatatype</code> of the <code>Attribute</code> */
    36      private XSDatatype datatype;
    37
    38      /*** The data (Object) value of the <code>Attribute</code> */
    39      private Object data;
    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 type) {
    47          super(qname, attributeCount);
    48          this.datatype = type;
    49      }
    50
    51      public String toString() {
    52          return getClass().getName() + hashCode() + " [Element: <"
    53                  + getQualifiedName() + " attributes: " + attributeList()
    54                  + " data: " + getData() + " />]";
    55      }
    56
    57      /***
    58       * Returns the MSV XSDatatype for this node
    59       *
    60       * @return DOCUMENT ME!
    61       */
    62      public XSDatatype getXSDatatype() {
    63          return datatype;
    64      }
    65
    66      // SerializationContext interface
    67      // -------------------------------------------------------------------------
    68      public String getNamespacePrefix(String uri) {
    69          Namespace namespace = getNamespaceForURI(uri);
    70
    71          return (namespace != null) ? namespace.getPrefix() : null;
    72      }
    73
    74      // ValidationContext interface
    75      // -------------------------------------------------------------------------
    76      public String getBaseUri() {
    77          // XXXX: could we use a Document for this?
    78          return null;
    79      }
    80
    81      public boolean isNotation(String notationName) {
    82          // XXXX: no way to do this yet in dom4j so assume false
    83          return false;
    84      }
    85
    86      public boolean isUnparsedEntity(String entityName) {
    87          // XXXX: no way to do this yet in dom4j so assume valid
    88          return true;
    89      }
    90
    91      public String resolveNamespacePrefix(String prefix) {
    92          Namespace namespace = getNamespaceForPrefix(prefix);
    93
    94          if (namespace != null) {
    95              return namespace.getURI();
    96          }
    97
    98          return null;
    99      }
    100
    101     // Element interface
    102     // -------------------------------------------------------------------------
    103     public Object getData() {
    104         if (data == null) {
    105             String text = getTextTrim();
    106
    107             if ((text != null) && (text.length() > 0)) {
    108                 if (datatype instanceof DatabindableDatatype) {
    109                     DatabindableDatatype bind = (DatabindableDatatype) datatype;
    110                     data = bind.createJavaObject(text, this);
    111                 } else {
    112                     data = datatype.createValue(text, this);
    113                 }
    114             }
    115         }
    116
    117         return data;
    118     }
    119
    120     public void setData(Object data) {
    121         String s = datatype.convertToLexicalValue(data, this);
    122         validate(s);
    123         this.data = data;
    124         setText(s);
    125     }
    126
    127     public Element addText(String text) {
    128         validate(text);
    129
    130         return super.addText(text);
    131     }
    132
    133     public void setText(String text) {
    134         validate(text);
    135         super.setText(text);
    136     }
    137
    138     // Implementation methods
    139     // -------------------------------------------------------------------------
    140
    141     /***
    142      * Override to force lazy recreation of data object
    143      *
    144      * @param node
    145      *            DOCUMENT ME!
    146      */
    147     protected void childAdded(Node node) {
    148         data = null;
    149         super.childAdded(node);
    150     }
    151
    152     /***
    153      * Override to force lazy recreation of data object
    154      *
    155      * @param node
    156      *            DOCUMENT ME!
    157      */
    158     protected void childRemoved(Node node) {
    159         data = null;
    160         super.childRemoved(node);
    161     }
    162
    163     protected void validate(String text) throws IllegalArgumentException {
    164         try {
    165             datatype.checkValid(text, this);
    166         } catch (DatatypeException e) {
    167             throw new IllegalArgumentException(e.getMessage());
    168         }
    169     }
    170 }
    171
    172 /*
    173  * Redistribution and use of this software and associated documentation
    174  * ("Software"), with or without modification, are permitted provided that the
    175  * following conditions are met:
    176  *
    177  * 1. Redistributions of source code must retain copyright statements and
    178  * notices. Redistributions must also contain a copy of this document.
    179  *
    180  * 2. Redistributions in binary form must reproduce the above copyright notice,
    181  * this list of conditions and the following disclaimer in the documentation
    182  * and/or other materials provided with the distribution.
    183  *
    184  * 3. The name "DOM4J" must not be used to endorse or promote products derived
    185  * from this Software without prior written permission of MetaStuff, Ltd. For
    186  * written permission, please contact dom4j-info@metastuff.com.
    187  *
    188  * 4. Products derived from this Software may not be called "DOM4J" nor may
    189  * "DOM4J" appear in their names without prior written permission of MetaStuff,
    190  * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
    191  *
    192  * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
    193  *
    194  * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
    195  * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    196  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    197  * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
    198  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    199  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    200  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    201  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    202  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    203  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    204  * POSSIBILITY OF SUCH DAMAGE.
    205  *
    206  * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
    207  */