1 /*
2 * $Header: /home/cvs/jakarta-commons-sandbox/jelly/src/taglibs/beanshell/src/java/org/apache/commons/jelly/tags/beanshell/BeanShellExpressionFactory.java,v 1.1 2002/05/21 07:58:55 jstrachan Exp $
3 * $Revision: 1.1 $
4 * $Date: 2002/05/21 07:58:55 $
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: BeanShellExpressionFactory.java,v 1.1 2002/05/21 07:58:55 jstrachan Exp $
61 */
62 package org.apache.commons.jelly.tags.validate;
63
64 import java.io.ByteArrayInputStream;
65 import java.io.InputStream;
66
67 import org.apache.commons.jelly.JellyException;
68 import org.apache.commons.jelly.MissingAttributeException;
69 import org.apache.commons.jelly.TagSupport;
70 import org.apache.commons.jelly.XMLOutput;
71
72 import org.iso_relax.verifier.Schema;
73 import org.iso_relax.verifier.Verifier;
74 import org.iso_relax.verifier.VerifierFactory;
75
76 import org.xml.sax.ErrorHandler;
77 import org.xml.sax.SAXException;
78 import org.xml.sax.SAXParseException;
79 import org.xml.sax.helpers.AttributesImpl;
80
81 /***
82 * This tag creates a new Verifier of a schema as a variable
83 * so that it can be used by a <validate> tag.
84 *
85 * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
86 * @version $Revision: 1.1 $
87 */
88 public class VerifierTag extends TagSupport {
89
90 /*** the variable name to export the Verifier as */
91 private String var;
92
93 /*** The URI to load the schema from */
94 private String uri;
95
96 /*** The system ID to use when parsing the schema */
97 private String systemId;
98
99 /*** The factory used to create new schema verifier objects */
100 private VerifierFactory factory;
101
102 // Tag interface
103 //-------------------------------------------------------------------------
104 public void doTag(final XMLOutput output) throws Exception {
105 if ( var == null ) {
106 throw new MissingAttributeException("var");
107 }
108
109 if ( factory == null ) {
110 factory = new com.sun.msv.verifier.jarv.TheFactoryImpl();
111 }
112 InputStream in = null;
113 if ( uri != null ) {
114 in = context.getResourceAsStream( uri );
115 if ( in == null ) {
116 throw new JellyException( "Could not find resource for uri: " + uri );
117 }
118 }
119 else {
120 String text = getBodyText();
121 byte[] data = text.getBytes();
122 in = new ByteArrayInputStream( text.getBytes() );
123 }
124
125 Schema schema = null;
126 if (systemId != null) {
127 schema = factory.compileSchema(in, systemId);
128 }
129 else if ( uri != null ) {
130 schema = factory.compileSchema(in, uri);
131 }
132 else{
133 schema = factory.compileSchema(in);
134 }
135 if ( schema == null ) {
136 throw new JellyException( "Could not create a valid schema" );
137 }
138 Verifier verifier = schema.newVerifier();
139 context.setVariable(var, verifier);
140 }
141
142 // Properties
143 //-------------------------------------------------------------------------
144
145 /***
146 * Sets the name of the variable that will be set to the new Verifier
147 *
148 * @jelly:required
149 */
150 public void setVar(String var) {
151 this.var = var;
152 }
153
154 /***
155 * Sets the URI of the schema file to parse. If no URI is specified then the
156 * body of this tag is used as the source of the schema
157 *
158 * @jelly:optional
159 */
160 public void setUri(String uri) {
161 this.uri = uri;
162 }
163
164 /***
165 * Sets the system ID used when parsing the schema
166 *
167 * @jelly:optional
168 */
169 public void setSystemId(String systemId) {
170 this.systemId = systemId;
171 }
172
173 /***
174 * Sets the factory used to create new schema verifier objects.
175 * If none is provided then the default MSV factory is used.
176 *
177 * @jelly:optional
178 */
179 public void setFactory(VerifierFactory factory) {
180 this.factory = factory;
181 }
182
183 // Implementation methods
184 //-------------------------------------------------------------------------
185
186
187 }
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