Coverage Report

Coverage Report - org.jaxen.javabean.DocumentNavigator

Classes in this File

Line Coverage

Branch Coverage

Complexity

DocumentNavigator

36%

28/77

70%

7/10

1.743

 /*
  $Id: DocumentNavigator.java,v 1.8 2006/06/03 20:35:31 elharo Exp $
 
  Copyright 2003 The Werken Company. All Rights Reserved.
  
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
 met:
 
   * Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
 
   * Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in the
     documentation and/or other materials provided with the distribution.
 
   * Neither the name of the Jaxen Project nor the names of its
     contributors may be used to endorse or promote products derived 
     from this software without specific prior written permission.
 
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
  */
 package org.jaxen.javabean;
 
 import java.lang.reflect.Method;
 import java.lang.reflect.InvocationTargetException;
 import java.util.Iterator;
 import java.util.Collection;
 
 import org.jaxen.DefaultNavigator;
 import org.jaxen.FunctionCallException;
 import org.jaxen.NamedAccessNavigator;
 import org.jaxen.Navigator;
 import org.jaxen.XPath;
 import org.jaxen.JaxenConstants;
 import org.jaxen.util.SingleObjectIterator;
 
 /** 
  * Interface for navigating around a JavaBean object model.
  *
  * <p>
  * This class is not intended for direct usage, but is
  * used by the Jaxen engine during evaluation.
  * </p>
  *
  * @see XPath
  *
  * @author <a href="mailto:bob@werken.com">bob mcwhirter</a>
  */
 public class DocumentNavigator
     extends DefaultNavigator
     implements NamedAccessNavigator
 {
 
     /**
      * 
      */
     private static final long serialVersionUID = -1768605107626726499L;
 
     /** Empty Class array. */
     private static final Class[] EMPTY_CLASS_ARRAY = new Class[0];
 
     /** Empty Object array. */
     private static final Object[] EMPTY_OBJECT_ARRAY = new Object[0];
 
     /** Singleton implementation.
      */
     private static final DocumentNavigator instance = new DocumentNavigator();
 
     /** Retrieve the singleton instance of this <code>DocumentNavigator</code>.
      */
     public static Navigator getInstance()
     {
         return instance;
     }
 
     public boolean isElement(Object obj)
     {
         return (obj instanceof Element);
     }
 
     public boolean isComment(Object obj)
     {
         return false;
     }
 
     public boolean isText(Object obj)
     {
         return ( obj instanceof String );
     }
 
     public boolean isAttribute(Object obj)
     {
         return false;
     }
 
     public boolean isProcessingInstruction(Object obj)
     {
         return false;
     }
 
     public boolean isDocument(Object obj)
     {
         return false;
     }
 
     public boolean isNamespace(Object obj)
     {
         return false;
     }
 
     public String getElementName(Object obj)
     {
         return ((Element)obj).getName();
     }
 
     public String getElementNamespaceUri(Object obj)
     {
         return "";
     }
 
     public String getElementQName(Object obj)
     {
         return "";
     }
 
     public String getAttributeName(Object obj)
     {
         return "";
     }
 
     public String getAttributeNamespaceUri(Object obj)
     {
         return "";
     }
 
     public String getAttributeQName(Object obj)
     {
         return "";
     }
 
     public Iterator getChildAxisIterator(Object contextNode)
     {
         return JaxenConstants.EMPTY_ITERATOR;
     }
 
     /**
      * Retrieves an <code>Iterator</code> over the child elements that
      * match the supplied name.
      *
      * @param contextNode  the origin context node
      * @param localName  the local name of the children to return, always present
      * @param namespacePrefix  the prefix of the namespace of the children to return
      * @param namespaceURI  the namespace URI of the children to return
      * @return an Iterator that traverses the named children, or null if none
      */
     public Iterator getChildAxisIterator(Object contextNode,
                                          String localName,
                                          String namespacePrefix,
                                          String namespaceURI)
     {
         Class cls = ((Element)contextNode).getObject().getClass();
 
         String methodName = javacase( localName );
 
         Method method = null;
         
         try
         {
             method = cls.getMethod( "get" + methodName, EMPTY_CLASS_ARRAY );
         }
         catch (NoSuchMethodException e)
         {
             try
             {
                 method = cls.getMethod( "get" + methodName + "s", EMPTY_CLASS_ARRAY );
             }
             catch (NoSuchMethodException ee)
             {
                 try
                 {
                     method = cls.getMethod( localName, EMPTY_CLASS_ARRAY );
                 }
                 catch (NoSuchMethodException eee)
                 {
                     method = null;
                 }
             }
         }
 
         if ( method == null )
         {
             return JaxenConstants.EMPTY_ITERATOR;
         }
 
         try
         {
             Object result = method.invoke( ((Element)contextNode).getObject(), EMPTY_OBJECT_ARRAY );
             
             if ( result == null )
             {
                 return JaxenConstants.EMPTY_ITERATOR;
             } 
             
             if ( result instanceof Collection )
             {
                 return new ElementIterator( (Element) contextNode, localName, ((Collection)result).iterator() );
             }
             
             if ( result.getClass().isArray() )
             {
                 return JaxenConstants.EMPTY_ITERATOR;
             }
             
             return new SingleObjectIterator( new Element( (Element) contextNode, localName, result ) );
         }
         catch (IllegalAccessException e)
         {
             // swallow
         }
         catch (InvocationTargetException e)
         {
             // swallow
         }
 
         return JaxenConstants.EMPTY_ITERATOR;
     }
 
     public Iterator getParentAxisIterator(Object contextNode)
     {
         if ( contextNode instanceof Element )
         {
             return new SingleObjectIterator( ((Element)contextNode).getParent() );
         }
 
         return JaxenConstants.EMPTY_ITERATOR;
     }
 
     public Iterator getAttributeAxisIterator(Object contextNode)
     {
         return JaxenConstants.EMPTY_ITERATOR;
     }
 
     /**
      * Retrieves an <code>Iterator</code> over the attribute elements that
      * match the supplied name.
      *
      * @param contextNode  the origin context node
      * @param localName  the local name of the attributes to return, always present
      * @param namespacePrefix  the prefix of the namespace of the attributes to return
      * @param namespaceURI  the namespace URI of the attributes to return
      * @return an Iterator that traverses the named attributes, not null
      */
     public Iterator getAttributeAxisIterator(Object contextNode,
                                              String localName,
                                              String namespacePrefix,
                                              String namespaceURI) {
         return JaxenConstants.EMPTY_ITERATOR;
     }
         
     public Iterator getNamespaceAxisIterator(Object contextNode)
     {
         return JaxenConstants.EMPTY_ITERATOR;
     }
 
     public Object getDocumentNode(Object contextNode)
     {
         return null;
     }
 
     public Object getParentNode(Object contextNode)
     {
         if ( contextNode instanceof Element )
         {
             return ((Element)contextNode).getParent();
         }
 
         return JaxenConstants.EMPTY_ITERATOR;
     }
 
     public String getTextStringValue(Object obj)
     {
         if ( obj instanceof Element )
         {
             return ((Element)obj).getObject().toString();
         }
         return obj.toString();
     }
 
     public String getElementStringValue(Object obj)
     {
         if ( obj instanceof Element )
         {
             return ((Element)obj).getObject().toString();
         }
         return obj.toString();
     }
 
     public String getAttributeStringValue(Object obj)
     {
         return obj.toString();
     }
 
     public String getNamespaceStringValue(Object obj)
     {
         return obj.toString();
     }
 
     public String getNamespacePrefix(Object obj)
     {
         return null;
     }
 
     public String getCommentStringValue(Object obj)
     {
         return null;
     }
     
     public String translateNamespacePrefixToUri(String prefix, Object context)
     {
         return null;
     }
     
     public short getNodeType(Object node) 
     {
         return 0;
     }
     
     public Object getDocument(String uri) throws FunctionCallException
     {
         return null;
     }
 
     public String getProcessingInstructionTarget(Object obj)
     {
         return null;
     }
 
     public String getProcessingInstructionData(Object obj)
     {
         return null;
     }
 
     public XPath parseXPath(String xpath)
         throws org.jaxen.saxpath.SAXPathException
     {
         return new JavaBeanXPath( xpath );
     }
 
     protected String javacase(String name)
     {
         if ( name.length() == 0 )
         {
             return name;
         }
         else if ( name.length() == 1 )
         {
             return name.toUpperCase();
         } 
 
         return name.substring( 0, 1 ).toUpperCase() + name.substring( 1 );
     }
 }

1		/*
2		$Id: DocumentNavigator.java,v 1.8 2006/06/03 20:35:31 elharo Exp $
3
4		Copyright 2003 The Werken Company. All Rights Reserved.
5
6		Redistribution and use in source and binary forms, with or without
7		modification, are permitted provided that the following conditions are
8		met:
9
10		* Redistributions of source code must retain the above copyright
11		notice, this list of conditions and the following disclaimer.
12
13		* Redistributions in binary form must reproduce the above copyright
14		notice, this list of conditions and the following disclaimer in the
15		documentation and/or other materials provided with the distribution.
16
17		* Neither the name of the Jaxen Project nor the names of its
18		contributors may be used to endorse or promote products derived
19		from this software without specific prior written permission.
20
21		THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
22		IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23		TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
24		PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
25		OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26		EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27		PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
28		PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29		LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30		NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31		SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32
33		*/
34		package org.jaxen.javabean;
35
36		import java.lang.reflect.Method;
37		import java.lang.reflect.InvocationTargetException;
38		import java.util.Iterator;
39		import java.util.Collection;
40
41		import org.jaxen.DefaultNavigator;
42		import org.jaxen.FunctionCallException;
43		import org.jaxen.NamedAccessNavigator;
44		import org.jaxen.Navigator;
45		import org.jaxen.XPath;
46		import org.jaxen.JaxenConstants;
47		import org.jaxen.util.SingleObjectIterator;
48
49		/**
50		* Interface for navigating around a JavaBean object model.
51		*
52		* <p>
53		* This class is not intended for direct usage, but is
54		* used by the Jaxen engine during evaluation.
55		* </p>
56		*
57		* @see XPath
58		*
59		* @author <a href="mailto:bob@werken.com">bob mcwhirter</a>
60		*/
61	2	public class DocumentNavigator
62		extends DefaultNavigator
63		implements NamedAccessNavigator
64		{
65
66		/**
67		*
68		*/
69		private static final long serialVersionUID = -1768605107626726499L;
70
71		/** Empty Class array. */
72	2	private static final Class[] EMPTY_CLASS_ARRAY = new Class[0];
73
74		/** Empty Object array. */
75	2	private static final Object[] EMPTY_OBJECT_ARRAY = new Object[0];
76
77		/** Singleton implementation.
78		*/
79	2	private static final DocumentNavigator instance = new DocumentNavigator();
80
81		/** Retrieve the singleton instance of this <code>DocumentNavigator</code>.
82		*/
83		public static Navigator getInstance()
84		{
85	2	return instance;
86		}
87
88		public boolean isElement(Object obj)
89		{
90	0	return (obj instanceof Element);
91		}
92
93		public boolean isComment(Object obj)
94		{
95	0	return false;
96		}
97
98		public boolean isText(Object obj)
99		{
100	0	return ( obj instanceof String );
101		}
102
103		public boolean isAttribute(Object obj)
104		{
105	6	return false;
106		}
107
108		public boolean isProcessingInstruction(Object obj)
109		{
110	0	return false;
111		}
112
113		public boolean isDocument(Object obj)
114		{
115	0	return false;
116		}
117
118		public boolean isNamespace(Object obj)
119		{
120	6	return false;
121		}
122
123		public String getElementName(Object obj)
124		{
125	0	return ((Element)obj).getName();
126		}
127
128		public String getElementNamespaceUri(Object obj)
129		{
130	0	return "";
131		}
132
133		public String getElementQName(Object obj)
134		{
135	0	return "";
136		}
137
138		public String getAttributeName(Object obj)
139		{
140	0	return "";
141		}
142
143		public String getAttributeNamespaceUri(Object obj)
144		{
145	0	return "";
146		}
147
148		public String getAttributeQName(Object obj)
149		{
150	0	return "";
151		}
152
153		public Iterator getChildAxisIterator(Object contextNode)
154		{
155	6	return JaxenConstants.EMPTY_ITERATOR;
156		}
157
158		/**
159		* Retrieves an <code>Iterator</code> over the child elements that
160		* match the supplied name.
161		*
162		* @param contextNode the origin context node
163		* @param localName the local name of the children to return, always present
164		* @param namespacePrefix the prefix of the namespace of the children to return
165		* @param namespaceURI the namespace URI of the children to return
166		* @return an Iterator that traverses the named children, or null if none
167		*/
168		public Iterator getChildAxisIterator(Object contextNode,
169		String localName,
170		String namespacePrefix,
171		String namespaceURI)
172		{
173	8	Class cls = ((Element)contextNode).getObject().getClass();
174
175	8	String methodName = javacase( localName );
176
177	8	Method method = null;
178
179		try
180		{
181	8	method = cls.getMethod( "get" + methodName, EMPTY_CLASS_ARRAY );
182		}
183	2	catch (NoSuchMethodException e)
184		{
185		try
186		{
187	2	method = cls.getMethod( "get" + methodName + "s", EMPTY_CLASS_ARRAY );
188		}
189	0	catch (NoSuchMethodException ee)
190		{
191		try
192		{
193	0	method = cls.getMethod( localName, EMPTY_CLASS_ARRAY );
194		}
195	0	catch (NoSuchMethodException eee)
196		{
197	0	method = null;
198	0	}
199	2	}
200	6	}
201
202	8	if ( method == null )
203		{
204	0	return JaxenConstants.EMPTY_ITERATOR;
205		}
206
207		try
208		{
209	8	Object result = method.invoke( ((Element)contextNode).getObject(), EMPTY_OBJECT_ARRAY );
210
211	8	if ( result == null )
212		{
213	0	return JaxenConstants.EMPTY_ITERATOR;
214		}
215
216	8	if ( result instanceof Collection )
217		{
218	2	return new ElementIterator( (Element) contextNode, localName, ((Collection)result).iterator() );
219		}
220
221	6	if ( result.getClass().isArray() )
222		{
223	0	return JaxenConstants.EMPTY_ITERATOR;
224		}
225
226	6	return new SingleObjectIterator( new Element( (Element) contextNode, localName, result ) );
227		}
228	0	catch (IllegalAccessException e)
229		{
230		// swallow
231		}
232	0	catch (InvocationTargetException e)
233		{
234		// swallow
235	0	}
236
237	0	return JaxenConstants.EMPTY_ITERATOR;
238		}
239
240		public Iterator getParentAxisIterator(Object contextNode)
241		{
242	0	if ( contextNode instanceof Element )
243		{
244	0	return new SingleObjectIterator( ((Element)contextNode).getParent() );
245		}
246
247	0	return JaxenConstants.EMPTY_ITERATOR;
248		}
249
250		public Iterator getAttributeAxisIterator(Object contextNode)
251		{
252	0	return JaxenConstants.EMPTY_ITERATOR;
253		}
254
255		/**
256		* Retrieves an <code>Iterator</code> over the attribute elements that
257		* match the supplied name.
258		*
259		* @param contextNode the origin context node
260		* @param localName the local name of the attributes to return, always present
261		* @param namespacePrefix the prefix of the namespace of the attributes to return
262		* @param namespaceURI the namespace URI of the attributes to return
263		* @return an Iterator that traverses the named attributes, not null
264		*/
265		public Iterator getAttributeAxisIterator(Object contextNode,
266		String localName,
267		String namespacePrefix,
268		String namespaceURI) {
269	0	return JaxenConstants.EMPTY_ITERATOR;
270		}
271
272		public Iterator getNamespaceAxisIterator(Object contextNode)
273		{
274	0	return JaxenConstants.EMPTY_ITERATOR;
275		}
276
277		public Object getDocumentNode(Object contextNode)
278		{
279	0	return null;
280		}
281
282		public Object getParentNode(Object contextNode)
283		{
284	66	if ( contextNode instanceof Element )
285		{
286	66	return ((Element)contextNode).getParent();
287		}
288
289	0	return JaxenConstants.EMPTY_ITERATOR;
290		}
291
292		public String getTextStringValue(Object obj)
293		{
294	0	if ( obj instanceof Element )
295		{
296	0	return ((Element)obj).getObject().toString();
297		}
298	0	return obj.toString();
299		}
300
301		public String getElementStringValue(Object obj)
302		{
303	0	if ( obj instanceof Element )
304		{
305	0	return ((Element)obj).getObject().toString();
306		}
307	0	return obj.toString();
308		}
309
310		public String getAttributeStringValue(Object obj)
311		{
312	0	return obj.toString();
313		}
314
315		public String getNamespaceStringValue(Object obj)
316		{
317	0	return obj.toString();
318		}
319
320		public String getNamespacePrefix(Object obj)
321		{
322	0	return null;
323		}
324
325		public String getCommentStringValue(Object obj)
326		{
327	0	return null;
328		}
329
330		public String translateNamespacePrefixToUri(String prefix, Object context)
331		{
332	0	return null;
333		}
334
335		public short getNodeType(Object node)
336		{
337	0	return 0;
338		}
339
340		public Object getDocument(String uri) throws FunctionCallException
341		{
342	0	return null;
343		}
344
345		public String getProcessingInstructionTarget(Object obj)
346		{
347	0	return null;
348		}
349
350		public String getProcessingInstructionData(Object obj)
351		{
352	0	return null;
353		}
354
355		public XPath parseXPath(String xpath)
356		throws org.jaxen.saxpath.SAXPathException
357		{
358	0	return new JavaBeanXPath( xpath );
359		}
360
361		protected String javacase(String name)
362		{
363	8	if ( name.length() == 0 )
364		{
365	0	return name;
366		}
367	8	else if ( name.length() == 1 )
368		{
369	0	return name.toUpperCase();
370		}
371
372	8	return name.substring( 0, 1 ).toUpperCase() + name.substring( 1 );
373		}
374		}