jdk8-mips64-public/corba: src/share/classes/sun/rmi/rmic/iiop/DirectoryLoader.java@e324dfb90c9e

     1 /*

     2  * Copyright (c) 1998, 2007, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    26 /*

    27  * Licensed Materials - Property of IBM

    28  * RMI-IIOP v1.0

    29  * Copyright IBM Corp. 1998 1999  All Rights Reserved

    30  *

    31  */

    33 package sun.rmi.rmic.iiop;

    35 import java.util.Hashtable;

    36 import java.io.File;

    37 import java.io.FileInputStream;

    39 /**

    40  * DirectoryLoader is a simple ClassLoader which loads from a specified

    41  * file system directory.

    42  * @author Bryan Atsatt

    43  */

    45 public class DirectoryLoader extends ClassLoader {

    47     private Hashtable cache;

    48     private File root;

    50     /**

    51      * Constructor.

    52      */

    53     public DirectoryLoader (File rootDir) {

    54         cache = new Hashtable();

    55         if (rootDir == null || !rootDir.isDirectory()) {

    56             throw new IllegalArgumentException();

    57         }

    58         root = rootDir;

    59     }

    61     private DirectoryLoader () {}

    63     /**

    64      * Convenience version of loadClass which sets 'resolve' == true.

    65      */

    66     public Class loadClass(String className) throws ClassNotFoundException {

    67         return loadClass(className, true);

    68     }

    70     /**

    71      * This is the required version of loadClass which is called

    72      * both from loadClass above and from the internal function

    73      * FindClassFromClass.

    74      */

    75     public synchronized Class loadClass(String className, boolean resolve)

    76         throws ClassNotFoundException {

    77         Class result;

    78         byte  classData[];

    80         // Do we already have it in the cache?

    82         result = (Class) cache.get(className);

    84         if (result == null) {

    86             // Nope, can we get if from the system class loader?

    88             try {

    90                 result = super.findSystemClass(className);

    92             } catch (ClassNotFoundException e) {

    94                 // No, so try loading it...

    96                 classData = getClassFileData(className);

    98                 if (classData == null) {

    99                     throw new ClassNotFoundException();

   100                 }

   102                 // Parse the class file data...

   104                 result = defineClass(classData, 0, classData.length);

   106                 if (result == null) {

   107                     throw new ClassFormatError();

   108                 }

   110                 // Resolve it...

   112                 if (resolve) resolveClass(result);

   114                 // Add to cache...

   116                 cache.put(className, result);

   117             }

   118         }

   120         return result;

   121     }

   123     /**

   124      * Reurn a byte array containing the contents of the class file.  Returns null

   125      * if an exception occurs.

   126      */

   127     private byte[] getClassFileData (String className) {

   129         byte result[] = null;

   130         FileInputStream stream = null;

   132         // Get the file...

   134         File classFile = new File(root,className.replace('.',File.separatorChar) + ".class");

   136         // Now get the bits...

   138         try {

   139             stream = new FileInputStream(classFile);

   140             result = new byte[stream.available()];

   141             stream.read(result);

   142         } catch(ThreadDeath death) {

   143             throw death;

   144         } catch (Throwable e) {

   145         }

   147         finally {

   148             if (stream != null) {

   149                 try {

   150                     stream.close();

   151                 } catch(ThreadDeath death) {

   152                     throw death;

   153                 } catch (Throwable e) {

   154                 }

   155             }

   156         }

   158         return result;

   159     }

   160 }

Mercurial > jdk8-mips64-public > corba / file revision