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src/share/classes/sun/rmi/rmic/iiop/DirectoryLoader.java@7ef37b2cdcad (annotated)

src/share/classes/sun/rmi/rmic/iiop/DirectoryLoader.java

Wed, 27 Apr 2016 01:21:28 +0800

author

aoqi

date

Wed, 27 Apr 2016 01:21:28 +0800

changeset 0

7ef37b2cdcad

child 748

6845b95cba6b

permissions

-rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/corba/
changeset: 765:f46df0af2ca8
tag: jdk8u25-b17

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1998, 2007, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation. Oracle designates this
aoqi@0	8	* particular file as subject to the "Classpath" exception as provided
aoqi@0	9	* by Oracle in the LICENSE file that accompanied this code.
aoqi@0	10	*
aoqi@0	11	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	14	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	15	* accompanied this code).
aoqi@0	16	*
aoqi@0	17	* You should have received a copy of the GNU General Public License version
aoqi@0	18	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	19	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	20	*
aoqi@0	21	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	22	* or visit www.oracle.com if you need additional information or have any
aoqi@0	23	* questions.
aoqi@0	24	*/
aoqi@0	25
aoqi@0	26	/*
aoqi@0	27	* Licensed Materials - Property of IBM
aoqi@0	28	* RMI-IIOP v1.0
aoqi@0	29	* Copyright IBM Corp. 1998 1999 All Rights Reserved
aoqi@0	30	*
aoqi@0	31	*/
aoqi@0	32
aoqi@0	33	package sun.rmi.rmic.iiop;
aoqi@0	34
aoqi@0	35	import java.util.Hashtable;
aoqi@0	36	import java.io.File;
aoqi@0	37	import java.io.FileInputStream;
aoqi@0	38
aoqi@0	39	/**
aoqi@0	40	* DirectoryLoader is a simple ClassLoader which loads from a specified
aoqi@0	41	* file system directory.
aoqi@0	42	* @author Bryan Atsatt
aoqi@0	43	*/
aoqi@0	44
aoqi@0	45	public class DirectoryLoader extends ClassLoader {
aoqi@0	46
aoqi@0	47	private Hashtable cache;
aoqi@0	48	private File root;
aoqi@0	49
aoqi@0	50	/**
aoqi@0	51	* Constructor.
aoqi@0	52	*/
aoqi@0	53	public DirectoryLoader (File rootDir) {
aoqi@0	54	cache = new Hashtable();
aoqi@0	55	if (rootDir == null || !rootDir.isDirectory()) {
aoqi@0	56	throw new IllegalArgumentException();
aoqi@0	57	}
aoqi@0	58	root = rootDir;
aoqi@0	59	}
aoqi@0	60
aoqi@0	61	private DirectoryLoader () {}
aoqi@0	62
aoqi@0	63	/**
aoqi@0	64	* Convenience version of loadClass which sets 'resolve' == true.
aoqi@0	65	*/
aoqi@0	66	public Class loadClass(String className) throws ClassNotFoundException {
aoqi@0	67	return loadClass(className, true);
aoqi@0	68	}
aoqi@0	69
aoqi@0	70	/**
aoqi@0	71	* This is the required version of loadClass which is called
aoqi@0	72	* both from loadClass above and from the internal function
aoqi@0	73	* FindClassFromClass.
aoqi@0	74	*/
aoqi@0	75	public synchronized Class loadClass(String className, boolean resolve)
aoqi@0	76	throws ClassNotFoundException {
aoqi@0	77	Class result;
aoqi@0	78	byte classData[];
aoqi@0	79
aoqi@0	80	// Do we already have it in the cache?
aoqi@0	81
aoqi@0	82	result = (Class) cache.get(className);
aoqi@0	83
aoqi@0	84	if (result == null) {
aoqi@0	85
aoqi@0	86	// Nope, can we get if from the system class loader?
aoqi@0	87
aoqi@0	88	try {
aoqi@0	89
aoqi@0	90	result = super.findSystemClass(className);
aoqi@0	91
aoqi@0	92	} catch (ClassNotFoundException e) {
aoqi@0	93
aoqi@0	94	// No, so try loading it...
aoqi@0	95
aoqi@0	96	classData = getClassFileData(className);
aoqi@0	97
aoqi@0	98	if (classData == null) {
aoqi@0	99	throw new ClassNotFoundException();
aoqi@0	100	}
aoqi@0	101
aoqi@0	102	// Parse the class file data...
aoqi@0	103
aoqi@0	104	result = defineClass(classData, 0, classData.length);
aoqi@0	105
aoqi@0	106	if (result == null) {
aoqi@0	107	throw new ClassFormatError();
aoqi@0	108	}
aoqi@0	109
aoqi@0	110	// Resolve it...
aoqi@0	111
aoqi@0	112	if (resolve) resolveClass(result);
aoqi@0	113
aoqi@0	114	// Add to cache...
aoqi@0	115
aoqi@0	116	cache.put(className, result);
aoqi@0	117	}
aoqi@0	118	}
aoqi@0	119
aoqi@0	120	return result;
aoqi@0	121	}
aoqi@0	122
aoqi@0	123	/**
aoqi@0	124	* Reurn a byte array containing the contents of the class file. Returns null
aoqi@0	125	* if an exception occurs.
aoqi@0	126	*/
aoqi@0	127	private byte[] getClassFileData (String className) {
aoqi@0	128
aoqi@0	129	byte result[] = null;
aoqi@0	130	FileInputStream stream = null;
aoqi@0	131
aoqi@0	132	// Get the file...
aoqi@0	133
aoqi@0	134	File classFile = new File(root,className.replace('.',File.separatorChar) + ".class");
aoqi@0	135
aoqi@0	136	// Now get the bits...
aoqi@0	137
aoqi@0	138	try {
aoqi@0	139	stream = new FileInputStream(classFile);
aoqi@0	140	result = new byte[stream.available()];
aoqi@0	141	stream.read(result);
aoqi@0	142	} catch(ThreadDeath death) {
aoqi@0	143	throw death;
aoqi@0	144	} catch (Throwable e) {
aoqi@0	145	}
aoqi@0	146
aoqi@0	147	finally {
aoqi@0	148	if (stream != null) {
aoqi@0	149	try {
aoqi@0	150	stream.close();
aoqi@0	151	} catch(ThreadDeath death) {
aoqi@0	152	throw death;
aoqi@0	153	} catch (Throwable e) {
aoqi@0	154	}
aoqi@0	155	}
aoqi@0	156	}
aoqi@0	157
aoqi@0	158	return result;
aoqi@0	159	}
aoqi@0	160	}