001: /*
002: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
003: *
004: * This file is part of Resin(R) Open Source
005: *
006: * Each copy or derived work must preserve the copyright notice and this
007: * notice unmodified.
008: *
009: * Resin Open Source is free software; you can redistribute it and/or modify
010: * it under the terms of the GNU General Public License as published by
011: * the Free Software Foundation; either version 2 of the License, or
012: * (at your option) any later version.
013: *
014: * Resin Open Source is distributed in the hope that it will be useful,
015: * but WITHOUT ANY WARRANTY; without even the implied warranty of
016: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017: * of NON-INFRINGEMENT. See the GNU General Public License for more
018: * details.
019: *
020: * You should have received a copy of the GNU General Public License
021: * along with Resin Open Source; if not, write to the
022: * Free SoftwareFoundation, Inc.
023: * 59 Temple Place, Suite 330
024: * Boston, MA 02111-1307 USA
025: *
026: * @author Scott Ferguson
027: */
028:
029: package com.caucho.jmx;
030:
031: import com.caucho.log.Log;
032: import com.caucho.util.L10N;
033:
034: import javax.management.loading.ClassLoaderRepository;
035: import java.util.ArrayList;
036: import java.util.logging.Logger;
037:
038: /**
039: * Resin implementation for a class loader repository.
040: */
041: public class ClassLoaderRepositoryImpl implements ClassLoaderRepository {
042: private static final L10N L = new L10N(
043: ClassLoaderRepositoryImpl.class);
044: private static final Logger log = Log
045: .open(ClassLoaderRepositoryImpl.class);
046:
047: private ArrayList<ClassLoader> _loaders = new ArrayList<ClassLoader>();
048:
049: /**
050: * Adds a class loader to the repository.
051: */
052: void addClassLoader(ClassLoader loader) {
053: _loaders.add(loader);
054: }
055:
056: /**
057: * Loads a class from the repository
058: */
059: public Class loadClass(String className)
060: throws ClassNotFoundException {
061: for (int i = 0; i < _loaders.size(); i++) {
062: ClassLoader loader = _loaders.get(i);
063:
064: try {
065: Class cl = loader.loadClass(className);
066:
067: if (cl != null)
068: return cl;
069: } catch (ClassNotFoundException e) {
070: }
071: }
072:
073: throw new ClassNotFoundException(L.l("can't load class {0}",
074: className));
075: }
076:
077: /**
078: * Loads a class from the repository, stopping at a given one
079: */
080: public Class loadClassBefore(ClassLoader stop, String className)
081: throws ClassNotFoundException {
082: for (int i = 0; i < _loaders.size(); i++) {
083: ClassLoader loader = _loaders.get(i);
084:
085: if (loader == stop)
086: break;
087:
088: try {
089: Class cl = loader.loadClass(className);
090:
091: if (cl != null)
092: return cl;
093: } catch (ClassNotFoundException e) {
094: }
095: }
096:
097: throw new ClassNotFoundException(L.l("can't load class {0}",
098: className));
099: }
100:
101: /**
102: * Loads a class from the repository, excluding a given one
103: */
104: public Class loadClassWithout(ClassLoader exclude, String className)
105: throws ClassNotFoundException {
106: for (int i = 0; i < _loaders.size(); i++) {
107: ClassLoader loader = _loaders.get(i);
108:
109: if (loader == exclude)
110: continue;
111:
112: try {
113: Class cl = loader.loadClass(className);
114:
115: if (cl != null)
116: return cl;
117: } catch (ClassNotFoundException e) {
118: }
119: }
120:
121: throw new ClassNotFoundException(L.l("can't load class {0}",
122: className));
123: }
124: }
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