01: /*
02: * Janino - An embedded Java[TM] compiler
03: *
04: * Copyright (c) 2006, Arno Unkrig
05: * All rights reserved.
06: *
07: * Redistribution and use in source and binary forms, with or without
08: * modification, are permitted provided that the following conditions
09: * are met:
10: *
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above
14: * copyright notice, this list of conditions and the following
15: * disclaimer in the documentation and/or other materials
16: * provided with the distribution.
17: * 3. The name of the author may not be used to endorse or promote
18: * products derived from this software without specific prior
19: * written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
25: * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27: * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
29: * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
31: * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32: */
33:
34: package org.codehaus.janino.util.resource;
35:
36: import java.util.*;
37:
38: /**
39: * A {@link org.codehaus.janino.util.resource.ResourceFinder} that finds its resources through a collection of
40: * other {@link org.codehaus.janino.util.resource.ResourceFinder}s.
41: */
42: public class MultiResourceFinder extends ResourceFinder {
43: private final Collection resourceFinders; // One for each entry
44:
45: /**
46: * @param resourceFinders The entries of the "path"
47: */
48: public MultiResourceFinder(Collection resourceFinders) {
49: this .resourceFinders = resourceFinders;
50: }
51:
52: // Implement ResourceFinder.
53:
54: public Resource findResource(String resourceName) {
55: for (Iterator it = this .resourceFinders.iterator(); it
56: .hasNext();) {
57: ResourceFinder rf = (ResourceFinder) it.next();
58: Resource resource = rf.findResource(resourceName);
59: //System.err.println("*** " + resourceName + " in " + rf + "? => " + url);
60: if (resource != null)
61: return resource;
62: }
63: return null;
64: }
65: }
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