1 /*
2 * ModeShape (http://www.modeshape.org)
3 * See the COPYRIGHT.txt file distributed with this work for information
4 * regarding copyright ownership. Some portions may be licensed
5 * to Red Hat, Inc. under one or more contributor license agreements.
6 * See the AUTHORS.txt file in the distribution for a full listing of
7 * individual contributors.
8 *
9 * ModeShape is free software. Unless otherwise indicated, all code in ModeShape
10 * is licensed to you under the terms of the GNU Lesser General Public License as
11 * published by the Free Software Foundation; either version 2.1 of
12 * the License, or (at your option) any later version.
13 *
14 * ModeShape is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this software; if not, write to the Free
21 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
22 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
23 */
24 package org.modeshape.common.component;
25
26 import net.jcip.annotations.Immutable;
27
28 /**
29 * A {@link ClassLoaderFactory} implementation that loads classes using the thread's {@link Thread#getContextClassLoader() context
30 * class loader} or (optionally) a supplied class loader.
31 */
32 @Immutable
33 public class StandardClassLoaderFactory implements ClassLoaderFactory {
34
35 private final ClassLoader delegate;
36 private final boolean useCurrentThreadContextClassLoader;
37
38 public StandardClassLoaderFactory() {
39 this(true, null);
40 }
41
42 public StandardClassLoaderFactory( final ClassLoader delegate ) {
43 this(true, delegate);
44 }
45
46 public StandardClassLoaderFactory( boolean useCurrentThreadContextClassLoader,
47 final ClassLoader delegate ) {
48 this.delegate = delegate != null ? delegate : this.getClass().getClassLoader();
49 this.useCurrentThreadContextClassLoader = useCurrentThreadContextClassLoader;
50 }
51
52 /**
53 * {@inheritDoc}
54 */
55 public ClassLoader getClassLoader( String... classpath ) {
56 ClassLoader result = null;
57 if (this.useCurrentThreadContextClassLoader) result = Thread.currentThread().getContextClassLoader();
58 if (result == null) result = this.delegate;
59 return result;
60 }
61 }