|
|||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
SAXHelper.java | 21,4% | 43,2% | 80% | 41,1% |
|
1 | /* | |
2 | * Copyright 2001-2004 (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 | * $Id: SAXHelper.java,v 1.15 2004/06/25 08:03:38 maartenc Exp $ | |
8 | */ | |
9 | ||
10 | package org.dom4j.io; | |
11 | ||
12 | import org.dom4j.io.aelfred2.SAXDriver; | |
13 | import org.xml.sax.SAXException; | |
14 | import org.xml.sax.SAXNotRecognizedException; | |
15 | import org.xml.sax.SAXNotSupportedException; | |
16 | import org.xml.sax.XMLReader; | |
17 | import org.xml.sax.helpers.XMLReaderFactory; | |
18 | ||
19 | /** <p><code>SAXHelper</code> contains some helper methods for working with | |
20 | * SAX and XMLReader objects. | |
21 | * | |
22 | * @author <a href="mailto:james.strachan@metastuff.com">James Strachan</a> | |
23 | * @version $Revision: 1.15 $ | |
24 | */ | |
25 | class SAXHelper { | |
26 | ||
27 | private static boolean loggedWarning = true; | |
28 | ||
29 | 23132 | public static boolean setParserProperty(XMLReader reader, String propertyName, Object value) { |
30 | 23132 | try { |
31 | 23132 | reader.setProperty(propertyName, value); |
32 | 11572 | return true; |
33 | } | |
34 | catch (SAXNotSupportedException e) { | |
35 | // ignore | |
36 | } | |
37 | catch (SAXNotRecognizedException e) { | |
38 | // ignore | |
39 | } | |
40 | 11560 | return false; |
41 | } | |
42 | ||
43 | 46240 | public static boolean setParserFeature(XMLReader reader, String featureName, boolean value) { |
44 | 46240 | try { |
45 | 46240 | reader.setFeature(featureName, value); |
46 | 34680 | return true; |
47 | } | |
48 | catch (SAXNotSupportedException e) { | |
49 | // ignore | |
50 | } | |
51 | catch (SAXNotRecognizedException e) { | |
52 | // ignore | |
53 | } | |
54 | 11560 | return false; |
55 | } | |
56 | ||
57 | /** Creats a default XMLReader via the org.xml.sax.driver system property | |
58 | * or JAXP if the system property is not set. | |
59 | */ | |
60 | 11478 | public static XMLReader createXMLReader(boolean validating) throws SAXException { |
61 | 11473 | XMLReader reader = null; |
62 | 11478 | if ( reader == null ) { |
63 | 11478 | reader = createXMLReaderViaJAXP( validating, true ); |
64 | } | |
65 | 11478 | if ( reader == null ) { |
66 | 0 | try { |
67 | 0 | reader = XMLReaderFactory.createXMLReader(); |
68 | } | |
69 | catch (Exception e) { | |
70 | 0 | if ( isVerboseErrorReporting() ) { |
71 | // log all exceptions as warnings and carry | |
72 | // on as we have a default SAX parser we can use | |
73 | 0 | System.out.println( |
74 | "Warning: Caught exception attempting to use SAX to " | |
75 | + "load a SAX XMLReader " | |
76 | ); | |
77 | 0 | System.out.println( "Warning: Exception was: " + e ); |
78 | 0 | System.out.println( |
79 | "Warning: I will print the stack trace then carry on " | |
80 | + "using the default SAX parser" | |
81 | ); | |
82 | 0 | e.printStackTrace(); |
83 | } | |
84 | } | |
85 | } | |
86 | 11478 | if ( reader == null ) { |
87 | 0 | System.out.println( |
88 | "Warning: Error occurred using SAX to load a SAXParser. " + | |
89 | "Will use Aelfred instead"); | |
90 | 0 | reader = new SAXDriver(); |
91 | } | |
92 | 11478 | return reader; |
93 | } | |
94 | ||
95 | /** This method attempts to use JAXP to locate the | |
96 | * SAX2 XMLReader implementation. | |
97 | * This method uses reflection to avoid being dependent directly | |
98 | * on the JAXP classes. | |
99 | */ | |
100 | 11478 | protected static XMLReader createXMLReaderViaJAXP(boolean validating, boolean namespaceAware) { |
101 | // try use JAXP to load the XMLReader... | |
102 | 11478 | try { |
103 | 11478 | return JAXPHelper.createXMLReader( validating, namespaceAware ); |
104 | } | |
105 | catch (Throwable e) { | |
106 | 0 | if ( ! loggedWarning ) { |
107 | 0 | loggedWarning = true; |
108 | 0 | if ( isVerboseErrorReporting() ) { |
109 | // log all exceptions as warnings and carry | |
110 | // on as we have a default SAX parser we can use | |
111 | 0 | System.out.println( |
112 | "Warning: Caught exception attempting to use JAXP to " | |
113 | + "load a SAX XMLReader " | |
114 | ); | |
115 | 0 | System.out.println( "Warning: Exception was: " + e ); |
116 | 0 | e.printStackTrace(); |
117 | } | |
118 | } | |
119 | } | |
120 | 0 | return null; |
121 | } | |
122 | ||
123 | 0 | protected static boolean isVerboseErrorReporting() { |
124 | 0 | try { |
125 | 0 | String flag = System.getProperty( "org.dom4j.verbose" ); |
126 | 0 | if ( flag != null && flag.equalsIgnoreCase( "true" ) ) { |
127 | 0 | return true; |
128 | } | |
129 | } | |
130 | catch (Exception e) { | |
131 | // in case a security exception | |
132 | // happens in an applet or similar JVM | |
133 | } | |
134 | 0 | return true; |
135 | } | |
136 | } | |
137 | ||
138 | ||
139 | ||
140 | ||
141 | /* | |
142 | * Redistribution and use of this software and associated documentation | |
143 | * ("Software"), with or without modification, are permitted provided | |
144 | * that the following conditions are met: | |
145 | * | |
146 | * 1. Redistributions of source code must retain copyright | |
147 | * statements and notices. Redistributions must also contain a | |
148 | * copy of this document. | |
149 | * | |
150 | * 2. Redistributions in binary form must reproduce the | |
151 | * above copyright notice, this list of conditions and the | |
152 | * following disclaimer in the documentation and/or other | |
153 | * materials provided with the distribution. | |
154 | * | |
155 | * 3. The name "DOM4J" must not be used to endorse or promote | |
156 | * products derived from this Software without prior written | |
157 | * permission of MetaStuff, Ltd. For written permission, | |
158 | * please contact dom4j-info@metastuff.com. | |
159 | * | |
160 | * 4. Products derived from this Software may not be called "DOM4J" | |
161 | * nor may "DOM4J" appear in their names without prior written | |
162 | * permission of MetaStuff, Ltd. DOM4J is a registered | |
163 | * trademark of MetaStuff, Ltd. | |
164 | * | |
165 | * 5. Due credit should be given to the DOM4J Project - | |
166 | * http://www.dom4j.org | |
167 | * | |
168 | * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS | |
169 | * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT | |
170 | * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
171 | * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL | |
172 | * METASTUFF, LTD. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
173 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
174 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
175 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
176 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
177 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
178 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
179 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
180 | * | |
181 | * Copyright 2001-2004 (C) MetaStuff, Ltd. All Rights Reserved. | |
182 | * | |
183 | * $Id: SAXHelper.java,v 1.15 2004/06/25 08:03:38 maartenc Exp $ | |
184 | */ |
|