View Javadoc

1   /*
2    * $Id: XPathExpressionEvaluator.java 11231 2008-03-06 21:17:37Z rossmason $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSource, Inc.  All rights reserved.  http://www.mulesource.com
5    *
6    * The software in this package is published under the terms of the CPAL v1.0
7    * license, a copy of which has been included with this distribution in the
8    * LICENSE.txt file.
9    */
10  
11  package org.mule.module.xml.expression;
12  
13  import org.mule.module.xml.i18n.XmlMessages;
14  
15  import org.dom4j.Node;
16  import org.jaxen.JaxenException;
17  import org.jaxen.XPath;
18  import org.jaxen.dom.DOMXPath;
19  import org.jaxen.dom4j.Dom4jXPath;
20  import org.w3c.dom.Document;
21  
22  /**
23   * Will select the text of a single node based on the property name
24   */
25  public class XPathExpressionEvaluator extends AbstractXPathExpressionEvaluator
26  {
27      public static final String NAME = "xpath";
28  
29      protected XPath createXPath(String expression, Object object) throws JaxenException
30      {
31          if(object instanceof Document)
32          {
33              return new DOMXPath(expression);
34          }
35          else if (object instanceof org.dom4j.Document)
36          {
37              return new Dom4jXPath(expression);
38          }
39  //        else if (object instanceof nu.xom.Document)
40  //        {
41  //            return new XOMXPath(expression);
42  //        }
43  //        else if (object instanceof org.jdom.Document)
44  //        {
45  //            return new JDOMXPath(expression);
46  //        }
47          else
48          {
49              throw new IllegalArgumentException(XmlMessages.domTypeNotSupported(object.getClass()).getMessage());
50          }
51      }
52  
53      protected Object extractResultFromNode(Object result)
54      {
55          if(result instanceof Node)
56          {
57              return ((Node)result).getText();
58          }
59          else if(result instanceof org.w3c.dom.Node)
60          {
61              return ((org.w3c.dom.Node)result).getFirstChild().getNodeValue();
62          }
63  //        else if(result instanceof nu.xom.Node)
64  //        {
65  //            return ((nu.xom.Node)result).getText();
66  //        }
67  //        else if(result instanceof org.jdom.Node)
68  //        {
69  //            return ((org.jdom.Node)result).getText();
70  //        }
71          else
72          {
73              throw new IllegalArgumentException(XmlMessages.domTypeNotSupported(result.getClass()).getMessage());
74          }
75      }
76  
77      /** {@inheritDoc} */
78      public String getName()
79      {
80          return NAME;
81      }
82  }