01: /**
02: * Copyright (c) 2003-2007, David A. Czarnecki
03: * All rights reserved.
04: *
05: * Redistribution and use in source and binary forms, with or without
06: * modification, are permitted provided that the following conditions are met:
07: *
08: * Redistributions of source code must retain the above copyright notice, this list of conditions and the
09: * following disclaimer.
10: * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
11: * following disclaimer in the documentation and/or other materials provided with the distribution.
12: * Neither the name of "David A. Czarnecki" and "blojsom" nor the names of its contributors may be used to
13: * endorse or promote products derived from this software without specific prior written permission.
14: * Products derived from this software may not be called "blojsom", nor may "blojsom" appear in their name,
15: * without prior written permission of David A. Czarnecki.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
18: * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
19: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
20: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
21: * EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
22: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26: * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
27: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30: */package org.blojsom.servlet;
31:
32: import javax.servlet.ServletConfig;
33:
34: import org.springframework.beans.factory.config.AbstractFactoryBean;
35:
36: /**
37: * Factory bean to return an instance of a {@link ServletConfig} object
38: *
39: * @author David Czarnecki
40: * @since blojsom 3.0
41: * @version $Id: ServletConfigFactoryBean.java,v 1.2 2007/01/17 02:35:18 czarneckid Exp $
42: */
43: public class ServletConfigFactoryBean extends AbstractFactoryBean {
44:
45: private static ServletConfig servletConfig;
46:
47: /**
48: * Return an instance of the {@link ServletConfig} object
49: *
50: * @return {@link ServletConfig}
51: * @throws Exception If the servlet config has not been set on this factory bean
52: */
53: protected final Object createInstance() throws Exception {
54: verifyState();
55:
56: return servletConfig;
57: }
58:
59: /**
60: * Returns <code>ServletConfig.class</code>
61: *
62: * @return <code>ServletConfig.class</code>
63: */
64: public final Class getObjectType() {
65: return ServletConfig.class;
66: }
67:
68: /**
69: * Static method to set the servlet config instance
70: *
71: * @param servletConfig {@link ServletConfig} instance
72: */
73: public static void setServletConfig(ServletConfig servletConfig) {
74: ServletConfigFactoryBean.servletConfig = servletConfig;
75: }
76:
77: /**
78: * Verify that the {@link ServletConfig} instance has been set on this bean
79: *
80: * @throws IllegalStateException If the {@link ServletConfig} instance has not been set
81: */
82: protected final void verifyState() throws IllegalStateException {
83: if (servletConfig == null) {
84: throw new IllegalStateException(
85: "You invoke the ServletConfigFactoryBean.setServletConfig() "
86: + "method prior to attempting to get the ServletConfig.");
87: }
88: }
89: }
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