1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
40 import java.util.HashSet;
41 import java.util.Set;
42 import java.util.jar.JarFile;
43 import java.util.logging.Level;
44 import java.util.logging.Logger;
45
46 /**
47 * Load classes/resources from a side folder, so that
48 * classes of the same package can live in a single jar file.
49 *
50 * <p>
51 * For example, with the following jar file:
52 * <pre>
53 * /
54 * +- foo
55 * +- X.class
56 * +- bar
57 * +- X.class
58 * </pre>
59 * <p>
60 * {@link ParallelWorldClassLoader}("foo/") would load {@code X.class} from
61 * {@code /foo/X.class} (note that X is defined in the root package, not
62 * {@code foo.X}.
63 *
64 * <p>
65 * This can be combined with {@link MaskingClassLoader} to mask classes which are loaded by the parent
66 * class loader so that the child class loader
67 * classes living in different folders are loaded
68 * before the parent class loader loads classes living the jar file publicly
69 * visible
70 * For example, with the following jar file:
71 * <pre>
72 * /
73 * +- foo
74 * +- X.class
75 * +- bar
76 * +-foo
77 * +- X.class
78 * </pre>
79 * <p>
80 * {@link ParallelWorldClassLoader}(MaskingClassLoader.class.getClassLoader())
81 * would load {@code foo.X.class} from
82 * {@code /bar/foo.X.class} not the {@code foo.X.class}
83 * in the publicly visible place in the jar file, thus
84 * masking the parent classLoader from loading the class from {@code foo.X.class}
85 * (note that X is defined in the package foo, not
86 * {@code bar.foo.X}.
87 *
88 * @author Kohsuke Kawaguchi
89 */
90 public class ParallelWorldClassLoader extends ClassLoader implements Closeable {
91
92 /**
93 * Strings like "prefix/", "abc/", or "" to indicate
94 * classes should be loaded normally.
95 */
96 private final String prefix;
97 private final Set<JarFile> jars;
98
99 public ParallelWorldClassLoader(ClassLoader parent,String prefix) {
100 super(parent);
101 this.prefix = prefix;
102 jars = Collections.synchronizedSet(new HashSet<JarFile>());
103 }
104
105 protected Class findClass(String name) throws ClassNotFoundException {
106
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1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
40 import java.util.HashSet;
41 import java.util.Set;
42 import java.util.jar.JarFile;
43 import java.util.logging.Level;
44 import java.util.logging.Logger;
45
46 /**
47 * Load classes/resources from a side folder, so that
48 * classes of the same package can live in a single jar file.
49 *
50 * <p>
51 * For example, with the following jar file:
52 * <pre>
53 * /
54 * +- foo
55 * +- X.class
56 * +- bar
57 * +- X.class
58 * </pre>
59 * <p>
60 * {@link ParallelWorldClassLoader}("foo/") would load <tt>X.class</tt> from
61 * <tt>/foo/X.class</tt> (note that X is defined in the root package, not
62 * <tt>foo.X</tt>.
63 *
64 * <p>
65 * This can be combined with {@link MaskingClassLoader} to mask classes which are loaded by the parent
66 * class loader so that the child class loader
67 * classes living in different folders are loaded
68 * before the parent class loader loads classes living the jar file publicly
69 * visible
70 * For example, with the following jar file:
71 * <pre>
72 * /
73 * +- foo
74 * +- X.class
75 * +- bar
76 * +-foo
77 * +- X.class
78 * </pre>
79 * <p>
80 * {@link ParallelWorldClassLoader}(MaskingClassLoader.class.getClassLoader()) would load <tt>foo.X.class</tt> from
81 * <tt>/bar/foo.X.class</tt> not the <tt>foo.X.class</tt> in the publicly visible place in the jar file, thus
82 * masking the parent classLoader from loading the class from <tt>foo.X.class</tt>
83 * (note that X is defined in the package foo, not
84 * <tt>bar.foo.X</tt>.
85 *
86 * @author Kohsuke Kawaguchi
87 */
88 public class ParallelWorldClassLoader extends ClassLoader implements Closeable {
89
90 /**
91 * Strings like "prefix/", "abc/", or "" to indicate
92 * classes should be loaded normally.
93 */
94 private final String prefix;
95 private final Set<JarFile> jars;
96
97 public ParallelWorldClassLoader(ClassLoader parent,String prefix) {
98 super(parent);
99 this.prefix = prefix;
100 jars = Collections.synchronizedSet(new HashSet<JarFile>());
101 }
102
103 protected Class findClass(String name) throws ClassNotFoundException {
104
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