01: /******************************************************************************
02: * JBoss, a division of Red Hat *
03: * Copyright 2006, Red Hat Middleware, LLC, and individual *
04: * contributors as indicated by the @authors tag. See the *
05: * copyright.txt in the distribution for a full listing of *
06: * individual contributors. *
07: * *
08: * This is free software; you can redistribute it and/or modify it *
09: * under the terms of the GNU Lesser General Public License as *
10: * published by the Free Software Foundation; either version 2.1 of *
11: * the License, or (at your option) any later version. *
12: * *
13: * This software is distributed in the hope that it will be useful, *
14: * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
16: * Lesser General Public License for more details. *
17: * *
18: * You should have received a copy of the GNU Lesser General Public *
19: * License along with this software; if not, write to the Free *
20: * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA *
21: * 02110-1301 USA, or see the FSF site: http://www.fsf.org. *
22: ******************************************************************************/package org.jboss.portal.core.model.content;
23:
24: import java.io.Serializable;
25:
26: /**
27: * Type safe string for notion of content type.
28: *
29: * @author <a href="mailto:julien@jboss.org">Julien Viet</a>
30: * @version $Revision: 8786 $
31: */
32: public final class ContentType implements Serializable {
33:
34: /** . */
35: public static final ContentType UNKNOWN = new ContentType("unknown");
36:
37: /** . */
38: public static final ContentType CMS = new ContentType("cms");
39:
40: /** . */
41: public static final ContentType PORTLET = new ContentType("portlet");
42:
43: /** . */
44: private final String value;
45:
46: private ContentType(String value) {
47: if (value == null) {
48: throw new IllegalArgumentException();
49: }
50: this .value = value;
51: }
52:
53: public int hashCode() {
54: return value.hashCode();
55: }
56:
57: public boolean equals(Object obj) {
58: if (obj == this ) {
59: return true;
60: }
61: if (obj instanceof ContentType) {
62: ContentType that = (ContentType) obj;
63: return value.equals(that.value);
64: }
65: return false;
66: }
67:
68: public String toString() {
69: return value;
70: }
71:
72: /**
73: * Factory method to create objects.
74: *
75: * @param value the wrapped value
76: * @return the corresponding content type
77: * @throws IllegalArgumentException if the string argument is null
78: */
79: public static ContentType create(String value)
80: throws IllegalArgumentException {
81: if ("portlet".equals(value)) {
82: return PORTLET;
83: } else if ("cms".equals(value)) {
84: return CMS;
85: } else if ("unknown".equals(value)) {
86: return UNKNOWN;
87: } else if (value == null) {
88: throw new IllegalArgumentException(
89: "No null value for content type accepted");
90: }
91: return new ContentType(value);
92: }
93: }
|