Coverage Report - org.jaxen.function.StringFunction

Classes in this Package	Line Coverage	Branch Coverage	Complexity
StringFunction	86%	100%	9.75;9.75

1		/*
2		* $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/function/StringFunction.java,v 1.18 2005/04/16 14:18:12 elharo Exp $
3		* $Revision: 1.18 $
4		* $Date: 2005/04/16 14:18:12 $
5		*
6		* ====================================================================
7		*
8		* Copyright (C) 2000-2002 bob mcwhirter & James Strachan.
9		* All rights reserved.
10		*
11		* Redistribution and use in source and binary forms, with or without
12		* modification, are permitted provided that the following conditions
13		* are met:
14		*
15		* 1. Redistributions of source code must retain the above copyright
16		* notice, this list of conditions, and the following disclaimer.
17		*
18		* 2. Redistributions in binary form must reproduce the above copyright
19		* notice, this list of conditions, and the disclaimer that follows
20		* these conditions in the documentation and/or other materials
21		* provided with the distribution.
22		*
23		* 3. The name "Jaxen" must not be used to endorse or promote products
24		* derived from this software without prior written permission. For
25		* written permission, please contact license@jaxen.org.
26		*
27		* 4. Products derived from this software may not be called "Jaxen", nor
28		* may "Jaxen" appear in their name, without prior written permission
29		* from the Jaxen Project Management (pm@jaxen.org).
30		*
31		* In addition, we request (but do not require) that you include in the
32		* end-user documentation provided with the redistribution and/or in the
33		* software itself an acknowledgement equivalent to the following:
34		* "This product includes software developed by the
35		* Jaxen Project (http://www.jaxen.org/)."
36		* Alternatively, the acknowledgment may be graphical using the logos
37		* available at http://www.jaxen.org/
38		*
39		* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
40		* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
41		* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
42		* DISCLAIMED. IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT
43		* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44		* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
45		* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
46		* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
47		* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
48		* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
49		* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50		* SUCH DAMAGE.
51		*
52		* ====================================================================
53		* This software consists of voluntary contributions made by many
54		* individuals on behalf of the Jaxen Project and was originally
55		* created by bob mcwhirter <bob@werken.com> and
56		* James Strachan <jstrachan@apache.org>. For more information on the
57		* Jaxen Project, please see <http://www.jaxen.org/>.
58		*
59		* $Id: StringFunction.java,v 1.18 2005/04/16 14:18:12 elharo Exp $
60		*/
61
62
63		package org.jaxen.function;
64
65		import org.jaxen.Context;
66		import org.jaxen.Function;
67		import org.jaxen.FunctionCallException;
68		import org.jaxen.Navigator;
69		import org.jaxen.UnsupportedAxisException;
70		import org.jaxen.JaxenRuntimeException;
71
72		import java.text.NumberFormat;
73		import java.util.List;
74		import java.util.Iterator;
75		import java.util.Locale;
76
77		/**
78		* <p><b>4.2</b> <code><i>string</i> string(<i>object</i>)</code>
79		*
80		* @author bob mcwhirter (bob @ werken.com)
81		*/
82	41	public class StringFunction implements Function
83		{
84
85	41	private static NumberFormat format = NumberFormat.getInstance(Locale.ENGLISH);
86
87		static {
88	41	format.setGroupingUsed(false);
89	41	format.setMaximumFractionDigits(32);
90	41	}
91
92		public Object call(Context context,
93		List args) throws FunctionCallException
94		{
95	25	int size = args.size();
96
97	25	if ( size == 0 )
98		{
99	20	return evaluate( context.getNodeSet(),
100		context.getNavigator() );
101		}
102	5	else if ( size == 1 )
103		{
104	5	return evaluate( args.get(0),
105		context.getNavigator() );
106		}
107
108	0	throw new FunctionCallException( "string() requires one argument." );
109		}
110
111		public static String evaluate(Object obj,
112		Navigator nav)
113		{
114		try
115		{
116	5487	if (obj == null) {
117	0	return "";
118		}
119
120		// Workaround because XOM uses lists for Text nodes
121		// so we need to check for that first
122	5487	if (nav != null && nav.isText(obj))
123		{
124	24	return nav.getTextStringValue(obj);
125		}
126
127	5463	if (obj instanceof List)
128		{
129	258	List list = (List) obj;
130	258	if (list.isEmpty())
131		{
132	8	return "";
133		}
134		// do not recurse: only first list should unwrap
135	250	obj = list.get(0);
136		}
137
138	5455	if (nav != null && (nav.isElement(obj) || nav.isDocument(obj)))
139		{
140	526	Iterator descendantAxisIterator = nav.getDescendantAxisIterator(obj);
141	526	StringBuffer sb = new StringBuffer();
142	1119	while (descendantAxisIterator.hasNext())
143		{
144	593	Object descendant = descendantAxisIterator.next();
145	593	if (nav.isText(descendant))
146		{
147	539	sb.append(nav.getTextStringValue(descendant));
148		}
149		}
150	526	return sb.toString();
151		}
152	4929	else if (nav != null && nav.isAttribute(obj))
153		{
154	1028	return nav.getAttributeStringValue(obj);
155		}
156	3901	else if (nav != null && nav.isText(obj))
157		{
158	20	return nav.getTextStringValue(obj);
159		}
160	3881	else if (nav != null && nav.isProcessingInstruction(obj))
161		{
162	12	return nav.getProcessingInstructionData(obj);
163		}
164	3869	else if (nav != null && nav.isComment(obj))
165		{
166	0	return nav.getCommentStringValue(obj);
167		}
168	3869	else if (nav != null && nav.isNamespace(obj))
169		{
170	0	return nav.getNamespaceStringValue(obj);
171		}
172	3869	else if (obj instanceof String)
173		{
174	3667	return (String) obj;
175		}
176	202	else if (obj instanceof Boolean)
177		{
178	104	return stringValue(((Boolean) obj).booleanValue());
179		}
180	98	else if (obj instanceof Number)
181		{
182	98	return stringValue(((Number) obj).doubleValue());
183		}
184	0	return "";
185		}
186	0	catch (UnsupportedAxisException e)
187		{
188	0	throw new JaxenRuntimeException(e);
189		}
190
191		}
192
193		public static String stringValue(double value)
194		{
195	98	return format.format(value);
196		}
197
198		public static String stringValue(boolean bool)
199		{
200	104	return bool ? "true" : "false";
201		}
202
203		}