01: /*
02: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
03: *
04: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
05: *
06: * The contents of this file are subject to the terms of either the GNU
07: * General Public License Version 2 only ("GPL") or the Common
08: * Development and Distribution License("CDDL") (collectively, the
09: * "License"). You may not use this file except in compliance with the
10: * License. You can obtain a copy of the License at
11: * http://www.netbeans.org/cddl-gplv2.html
12: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
13: * specific language governing permissions and limitations under the
14: * License. When distributing the software, include this License Header
15: * Notice in each file and include the License file at
16: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
17: * particular file as subject to the "Classpath" exception as provided
18: * by Sun in the GPL Version 2 section of the License file that
19: * accompanied this code. If applicable, add the following below the
20: * License Header, with the fields enclosed by brackets [] replaced by
21: * your own identifying information:
22: * "Portions Copyrighted [year] [name of copyright owner]"
23: *
24: * Contributor(s):
25: *
26: * Portions Copyrighted 2007 Sun Microsystems, Inc.
27: */
28: package org.netbeans.modules.web.project;
29:
30: import org.netbeans.api.java.classpath.ClassPath;
31: import org.netbeans.spi.java.classpath.ClassPathProvider;
32: import org.netbeans.spi.project.LookupMerger;
33: import org.openide.filesystems.FileObject;
34: import org.openide.util.Lookup;
35:
36: /**
37: *
38: * @author Tomas Zezula
39: */
40: public final class ClassPathProviderMerger implements
41: LookupMerger<ClassPathProvider> {
42:
43: private final ClassPathProvider defaultProvider;
44:
45: public ClassPathProviderMerger(
46: final ClassPathProvider defaultProvider) {
47: assert defaultProvider != null;
48: this .defaultProvider = defaultProvider;
49: }
50:
51: public Class<ClassPathProvider> getMergeableClass() {
52: return ClassPathProvider.class;
53: }
54:
55: public ClassPathProvider merge(Lookup lookup) {
56: return new CPProvider(lookup);
57: }
58:
59: private class CPProvider implements ClassPathProvider {
60:
61: private final Lookup lookup;
62:
63: public CPProvider(final Lookup lookup) {
64: assert lookup != null;
65: this .lookup = lookup;
66: }
67:
68: public ClassPath findClassPath(FileObject file, String type) {
69: ClassPath result = defaultProvider
70: .findClassPath(file, type);
71: if (result != null) {
72: return result;
73: }
74: for (ClassPathProvider cpProvider : lookup
75: .lookupAll(ClassPathProvider.class)) {
76: result = cpProvider.findClassPath(file, type);
77: if (result != null) {
78: return result;
79: }
80: }
81: return null;
82: }
83: }
84:
85: }
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