1 /***
2 * Redistribution and use of this software and associated documentation
3 * ("Software"), with or without modification, are permitted provided
4 * that the following conditions are met:
5 *
6 * 1. Redistributions of source code must retain copyright
7 * statements and notices. Redistributions must also contain a
8 * copy of this document.
9 *
10 * 2. Redistributions in binary form must reproduce the
11 * above copyright notice, this list of conditions and the
12 * following disclaimer in the documentation and/or other
13 * materials provided with the distribution.
14 *
15 * 3. The name "Exolab" must not be used to endorse or promote
16 * products derived from this Software without prior written
17 * permission of Exoffice Technologies. For written permission,
18 * please contact info@exolab.org.
19 *
20 * 4. Products derived from this Software may not be called "Exolab"
21 * nor may "Exolab" appear in their names without prior written
22 * permission of Exoffice Technologies. Exolab is a registered
23 * trademark of Exoffice Technologies.
24 *
25 * 5. Due credit should be given to the Exolab Project
26 * (http://www.exolab.org/).
27 *
28 * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
29 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
31 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
32 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
33 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
34 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
35 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39 * OF THE POSSIBILITY OF SUCH DAMAGE.
40 *
41 * Copyright 2001-2003 (C) Exoffice Technologies Inc. All Rights Reserved.
42 *
43 * $Id: ConnectorHelper.java,v 1.4 2003/08/07 13:32:55 tanderson Exp $
44 */
45 package org.exolab.jms.config;
46
47 import java.io.IOException;
48 import java.io.InputStream;
49 import java.io.InputStreamReader;
50
51 import org.apache.commons.logging.Log;
52 import org.apache.commons.logging.LogFactory;
53
54 import org.exolab.jms.config.types.SchemeType;
55
56
57 /***
58 * ConnectorHelper is a utility class that returns {@link ConnectorResource}
59 * objects for a given scheme.
60 *
61 * @version $Revision: 1.4 $ $Date: 2003/08/07 13:32:55 $
62 * @author <a href="mailto:tima@intalio.com">Tim Anderson</a>
63 */
64 public class ConnectorHelper {
65
66 /***
67 * The default connector resource configurations
68 */
69 private static final ConnectorResource[] _connectors;
70
71 /***
72 * The logger
73 */
74 private static final Log _log = LogFactory.getLog(ConnectorHelper.class);
75
76 /***
77 * The connector configuration path as a resource
78 */
79 private static final String RESOURCE =
80 "/org/exolab/jms/config/connectors.xml";
81
82
83 /***
84 * Returns the connector resource for the supplied scheme.
85 * This uses the configuration returned by
86 * {@link ConfigurationManager#getConfig}
87 *
88 * @param scheme the connector scheme
89 * @return the connector configuration, or null if none exists
90 */
91 public static ConnectorResource getConnectorResource(SchemeType scheme) {
92 return getConnectorResource(scheme, ConfigurationManager.getConfig());
93 }
94
95 /***
96 * Returns the connector resource for the supplied scheme, from
97 * the supplied configuration. If the configuration doesn't define
98 * any connector resources, the default connector for the scheme will be
99 * returned.
100 *
101 * @param scheme the connector scheme
102 * @param config the configuration
103 * @return the connector configuration, or null if none exists
104 */
105 public static ConnectorResource getConnectorResource(
106 SchemeType scheme, Configuration config) {
107
108 if (scheme == null) {
109 throw new IllegalArgumentException("Argument 'scheme' is null");
110 }
111 if (config == null) {
112 throw new IllegalArgumentException("Argument 'config' is null");
113 }
114
115 ConnectorResource result = null;
116 ConnectorResource[] connectors = _connectors;
117 if (config.getConnectorResources() != null) {
118
119 connectors = config.getConnectorResources().getConnectorResource();
120 }
121
122 String name = scheme.toString();
123 for (int i = 0; i < connectors.length; ++i) {
124 if (connectors[i].getScheme().toString().equals(name)) {
125 result = connectors[i];
126 break;
127 }
128 }
129 return result;
130 }
131
132 static {
133
134
135 InputStream stream = null;
136 try {
137 ConnectorResources connectors = null;
138 stream = ConnectorHelper.class.getResourceAsStream(RESOURCE);
139 connectors = ConnectorResources.unmarshal(
140 new InputStreamReader(stream));
141 _connectors = connectors.getConnectorResource();
142 } catch (Exception exception) {
143 _log.error(exception, exception);
144 throw new RuntimeException(exception.getMessage());
145 } finally {
146 if (stream != null) {
147 try {
148 stream.close();
149 } catch (IOException ignore) {
150 }
151 }
152 }
153 }
154
155 }