01: /*
02: * Janino - An embedded Java[TM] compiler
03: *
04: * Copyright (c) 2001-2007, 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.io.*;
37: import java.util.*;
38: import java.util.zip.*;
39:
40: import org.codehaus.janino.util.iterator.*;
41:
42: /**
43: * Finds resources in any of the "*.jar" files that exist in a given set of directories.
44: */
45: public class JarDirectoriesResourceFinder extends
46: LazyMultiResourceFinder {
47:
48: /**
49: * @param directories The set of directories to search for JAR files.
50: */
51: public JarDirectoriesResourceFinder(final File[] directories) {
52: super (new MultiDimensionalIterator(
53:
54: // Iterate over directories.
55: new TransformingIterator(Arrays.asList(directories)
56: .iterator()) {
57: protected Object transform(Object o) { // File directory => Iterator ResourceFinder
58: File directory = (File) o;
59:
60: if (!directory.exists())
61: return Collections.EMPTY_LIST.iterator();
62:
63: // Iterate over the JAR files in the given directory.
64: File[] jarFiles = directory
65: .listFiles(new FilenameFilter() {
66: public boolean accept(File dir,
67: String name) {
68: return name.endsWith(".jar");
69: }
70: });
71: return new TransformingIterator(Arrays.asList(
72: jarFiles).iterator()) {
73: protected Object transform(Object o) { // File jarFile => ResourceFinder
74: File zipFile = (File) o;
75: try {
76: return new ZipFileResourceFinder(
77: new ZipFile(zipFile));
78: } catch (IOException e) {
79: return ResourceFinder.EMPTY_RESOURCE_FINDER;
80: }
81: }
82: };
83: }
84: }, 2));
85: }
86: }
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