AppletObjectInputStream.java

/*
 * @(#)AppletObjectInputStream.java	1.15 06/10/16
 *
 * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 only, as published by the Free Software Foundation. 
 * 
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License version 2 for more details (a copy is
 * included at /legal/license.txt). 
 * 
 * You should have received a copy of the GNU General Public License
 * version 2 along with this work; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA 
 * 
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions. 
 */

package sun.applet;

import java.io.*;
import java.lang.reflect.Array;

/**
 * This subclass of ObjectInputStream delegates loading of classes to
 * an existing ClassLoader.
 */

class AppletObjectInputStream extends ObjectInputStream {
    private AppletClassLoader loader;
    /**
     * Loader must be non-null;
     */

    public AppletObjectInputStream(InputStream in, AppletClassLoader loader)
        throws IOException, StreamCorruptedException {
        super(in);
        if (loader == null) {
            throw new AppletIllegalArgumentException("appletillegalargumentexception.objectinputstream");
        }
        this.loader = loader;
    }

    /**
     * Make a primitive array class
     */

    private Class primitiveType(char type) {
        switch (type) {
        case 'B':
            return byte.class;

        case 'C':
            return char.class;

        case 'D':
            return double.class;

        case 'F':
            return float.class;

        case 'I':
            return int.class;

        case 'J':
            return long.class;

        case 'S':
            return short.class;

        case 'Z':
            return boolean.class;

        default:
            return null;
        }
    }

    /**
     * Use the given ClassLoader rather than using the system class
     */
    protected Class resolveClass(ObjectStreamClass classDesc)
        throws IOException, ClassNotFoundException {
        String cname = classDesc.getName();
        if (cname.startsWith("[")) {
            // An array
            Class component;		// component class
            int dcount;			// dimension
            for (dcount = 1; cname.charAt(dcount) == '['; dcount++);
            if (cname.charAt(dcount) == 'L') {
                component = loader.loadClass(cname.substring(dcount + 1,
                                cname.length() - 1));
            } else {
                if (cname.length() != dcount + 1) {
                    throw new ClassNotFoundException(cname);// malformed
                }
                component = primitiveType(cname.charAt(dcount));
            }
            int dim[] = new int[dcount];
            for (int i = 0; i < dcount; i++) {
                dim[i] = 0;
            }
            return Array.newInstance(component, dim).getClass();
        } else {
            return loader.loadClass(cname);
        }
    }
}