77 lines
2.7 KiB
Java
77 lines
2.7 KiB
Java
/*
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* Copyright (c) 2010, 2018, 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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import java.io.ByteArrayInputStream;
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import java.io.FileInputStream;
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public class Loader2 extends ClassLoader {
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int _recur;
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public void print( String msg ) {
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for( int i=0; i<_recur; i++ )
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System.out.print(" ");
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System.out.println(">>Loader2>> "+msg);
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}
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protected Class findClass2(String name) throws ClassNotFoundException {
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print("Fetching the implementation of "+name);
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int old = _recur;
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try {
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FileInputStream fi = new FileInputStream(name+".class");
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byte result[] = new byte[fi.available()];
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fi.read(result);
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print("DefineClass1 on "+name);
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_recur++;
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Class clazz = defineClass(name, result, 0, result.length);
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_recur = old;
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print("Returning newly loaded class.");
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return clazz;
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} catch (Exception e) {
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_recur = old;
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print("Not found on disk.");
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// If we caught an exception, either the class was not found or
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// it was unreadable by our process.
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return null;
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//throw new ClassNotFoundException(e.toString());
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}
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}
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protected synchronized Class loadClass(String name, boolean resolve) throws ClassNotFoundException {
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// Attempt a disk load first
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Class c = findClass2(name);
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if( c == null ) {
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// check if the class has already been loaded
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print("Checking for prior loaded class "+name);
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c = findLoadedClass(name);
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print("Letting super-loader load "+name);
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int old = _recur;
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_recur++;
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c = super.loadClass(name, false);
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_recur=old;
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}
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if (resolve) { print("Resolving class "+name); resolveClass(c); }
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print("Returning clazz "+c.getClassLoader()+":"+name);
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return c;
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}
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}
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