01: /*
02: * This file is part of the Echo Web Application Framework (hereinafter "Echo").
03: * Copyright (C) 2002-2005 NextApp, Inc.
04: *
05: * Version: MPL 1.1/GPL 2.0/LGPL 2.1
06: *
07: * The contents of this file are subject to the Mozilla Public License Version
08: * 1.1 (the "License"); you may not use this file except in compliance with
09: * the License. You may obtain a copy of the License at
10: * http://www.mozilla.org/MPL/
11: *
12: * Software distributed under the License is distributed on an "AS IS" basis,
13: * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14: * for the specific language governing rights and limitations under the
15: * License.
16: *
17: * Alternatively, the contents of this file may be used under the terms of
18: * either the GNU General Public License Version 2 or later (the "GPL"), or
19: * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
20: * in which case the provisions of the GPL or the LGPL are applicable instead
21: * of those above. If you wish to allow use of your version of this file only
22: * under the terms of either the GPL or the LGPL, and not to allow others to
23: * use your version of this file under the terms of the MPL, indicate your
24: * decision by deleting the provisions above and replace them with the notice
25: * and other provisions required by the GPL or the LGPL. If you do not delete
26: * the provisions above, a recipient may use your version of this file under
27: * the terms of any one of the MPL, the GPL or the LGPL.
28: */
29:
30: package nextapp.echo2.app.util;
31:
32: import java.io.IOException;
33: import java.io.InputStream;
34: import java.net.URL;
35: import java.util.Enumeration;
36: import java.util.HashMap;
37: import java.util.Map;
38: import java.util.Properties;
39:
40: /**
41: * Utility class for retrieving property files matching a specific name
42: * across the CLASSPATH.
43: */
44: public class PropertiesDiscovery {
45:
46: /**
47: * Returns a map containing the contents of all property files with
48: * the specified resource name.
49: *
50: * @param resourceName the name of the properties file(s) to load
51: * @return a map containing properties of all properties files
52: * in the CLASSPATH matching the specified
53: * <code>resourceName</code>
54: */
55: public static Map loadProperties(String resourceName,
56: ClassLoader classLoader) throws IOException {
57: Map propertyMap = new HashMap();
58: Enumeration resources = classLoader.getResources(resourceName);
59: while (resources.hasMoreElements()) {
60: URL resourceUrl = (URL) resources.nextElement();
61: Properties peerProperties = new Properties();
62: InputStream in = resourceUrl.openStream();
63: try {
64: peerProperties.load(in);
65: propertyMap.putAll(peerProperties);
66: } finally {
67: in.close();
68: }
69: }
70: return propertyMap;
71: }
72:
73: /** Non-instantiable class. */
74: private PropertiesDiscovery() {
75: }
76: }
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