94 lines
3.2 KiB
Java
94 lines
3.2 KiB
Java
/*
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* Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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*
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*/
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import java.util.*;
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import java.io.*;
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class ClassLoaderTarg extends ClassLoader {
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private Hashtable loaded = new Hashtable();
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String id;
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public ClassLoaderTarg(String id) {
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this.id = id;
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}
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private byte[] loadClassBytes(String cname)
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throws ClassNotFoundException {
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StringTokenizer stk = new StringTokenizer(System.getProperty("java.class.path"),
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File.pathSeparator);
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/* search class path for the class file */
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while (stk.hasMoreTokens()) {
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File cfile = new File(stk.nextToken() + File.separator +
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cname + ".class");
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if (cfile.exists()) {
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System.out.println("loading from: " + cfile);
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return loadBytes(cfile, cname);
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} else {
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System.out.println("no file: " + cfile + " - trying next");
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}
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}
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throw new ClassNotFoundException(cname);
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}
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private byte[] loadBytes(File cfile, String cname)
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throws ClassNotFoundException {
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try {
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long fsize = cfile.length();
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if (fsize > 0) {
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FileInputStream in = new FileInputStream(cfile);
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byte[] cbytes = new byte[(int)fsize];
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in.read(cbytes);
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in.close();
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return cbytes;
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}
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} catch (IOException exc) {
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// drop down
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}
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throw new ClassNotFoundException(cname);
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}
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public synchronized Class findClass(String cname)
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throws ClassNotFoundException {
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Class klass = (Class)loaded.get(cname);
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if (klass == null) {
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byte[] cbytes = loadClassBytes(cname);
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klass = defineClass(cname, cbytes, 0, cbytes.length);
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loaded.put(cname, klass);
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System.err.println("ClassLoaderTarg (" + id +") loaded: " + cname);
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}
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return klass;
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}
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protected void finalize() {
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UnloadEventTarg.classLoaderFinalized(id);
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try {
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super.finalize();
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} catch (Throwable thrown) {
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}
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}
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}
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