1 /*
2 * $Header: /home/cvs/jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/tags/xml/ParseTag.java,v 1.10 2002/07/19 22:18:10 jstrachan Exp $
3 * $Revision: 1.10 $
4 * $Date: 2002/07/19 22:18:10 $
5 *
6 * ====================================================================
7 *
8 * The Apache Software License, Version 1.1
9 *
10 * Copyright (c) 1999-2002 The Apache Software Foundation. All rights
11 * reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 *
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 *
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in
22 * the documentation and/or other materials provided with the
23 * distribution.
24 *
25 * 3. The end-user documentation included with the redistribution, if
26 * any, must include the following acknowlegement:
27 * "This product includes software developed by the
28 * Apache Software Foundation (http://www.apache.org/)."
29 * Alternately, this acknowlegement may appear in the software itself,
30 * if and wherever such third-party acknowlegements normally appear.
31 *
32 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
33 * Foundation" must not be used to endorse or promote products derived
34 * from this software without prior written permission. For written
35 * permission, please contact apache@apache.org.
36 *
37 * 5. Products derived from this software may not be called "Apache"
38 * nor may "Apache" appear in their names without prior written
39 * permission of the Apache Group.
40 *
41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
44 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
48 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
49 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
50 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
51 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * SUCH DAMAGE.
53 * ====================================================================
54 *
55 * This software consists of voluntary contributions made by many
56 * individuals on behalf of the Apache Software Foundation. For more
57 * information on the Apache Software Foundation, please see
58 * <http://www.apache.org/>.
59 *
60 * $Id: ParseTag.java,v 1.10 2002/07/19 22:18:10 jstrachan Exp $
61 */
62 package org.apache.commons.jelly.tags.xml;
63
64 import org.apache.commons.jelly.XMLOutput;
65
66 import org.apache.commons.logging.Log;
67 import org.apache.commons.logging.LogFactory;
68
69 import org.dom4j.Document;
70 import org.dom4j.io.SAXReader;
71
72 /*** A tag which parses some XML and defines a variable with the parsed Document.
73 * The XML can either be specified as its body or can be passed in via the
74 * xml property which can be a Reader, InputStream, URL or String URI.
75 *
76 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
77 * @version $Revision: 1.10 $
78 */
79 public class ParseTag extends ParseTagSupport {
80
81 /*** The Log to which logging calls will be made. */
82 private static final Log log = LogFactory.getLog(ParseTag.class);
83
84 /*** The xml to parse, either a String URI, a Reader or InputStream */
85 private Object xml;
86
87 // Optional properties not defined in JSTL
88 /*** whether XML validation is enabled or disabled */
89 private boolean validate;
90
91 public ParseTag() {
92 }
93
94 // Tag interface
95 //-------------------------------------------------------------------------
96 public void doTag(XMLOutput output) throws Exception {
97 if (getVar() == null) {
98 throw new IllegalArgumentException("The var attribute cannot be null");
99 }
100 Document document = null;
101 if (xml == null) {
102 document = parseBody(output);
103 }
104 else {
105 document = parse(xml);
106 }
107 context.setVariable(getVar(), document);
108 }
109
110 // Properties
111 //-------------------------------------------------------------------------
112 /*** Sets the source of the XML which is either a String URI, Reader or InputStream */
113 public void setXml(Object xml) {
114 this.xml = xml;
115 }
116
117 /*** @return whether XML validation is enabled or disabled */
118 public boolean getValidate() {
119 return validate;
120 }
121
122 /*** Sets whether XML validation is enabled or disabled */
123 public void setValidate(boolean validate) {
124 this.validate = validate;
125 }
126
127
128 // Implementation methods
129 //-------------------------------------------------------------------------
130
131 /***
132 * Factory method to create a new SAXReader
133 */
134 protected SAXReader createSAXReader() throws Exception {
135 return new SAXReader(validate);
136 }
137 }
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