ozoneclassloader11.java

用Java写的面相对象的数据库管理系统

// You can redistribute this software and/or modify it under the terms of
// the Ozone Core License version 1 published by ozone-db.org.
//
// The original code and portions created by SMB are
// Copyright (C) 1997-2000 by SMB GmbH. All rights reserved.
//
// $Id: OzoneClassLoader11.java,v 1.3 2000/10/28 16:55:17 daniela Exp $

package org.ozoneDB.core;

import java.io.*;
import org.ozoneDB.*;
import org.ozoneDB.DxLib.*;


/**
 * Ozone specific class loader. This compiles/runs with JDK 1.1 only.
 * 
 * 
 * @author <a href="http://www.softwarebuero.de/">SMB</a>
 * @version $Revision: 1.3 $Date: 2000/10/28 16:55:17 $
 */
class OzoneClassLoader11 extends ClassLoader {
    
    protected DxMap classTable;
    
    
    public OzoneClassLoader11() {
        super();
        classTable = new DxHashMap( 100 );
    }
    
    
    protected void flushCache() {
    } 
    
    
    public Class loadClass( String name ) throws ClassNotFoundException {
        return loadClass( name, false );
    } 
    
    
    public Class loadClass( String name, boolean resolve ) throws ClassNotFoundException {
        Class cl = (Class)classTable.elementForKey( name );
        if (cl == null) {
            cl = primitiveType( name );
            if (cl == null) {
                cl = Class.forName( name );
            } 
            classTable.addForKey( cl, name );
        } 
        return cl;
    } 
    
    
    /**
     * Load primitive types with default class loader.
     */
    protected static Class primitiveType( String name ) {
        if (name.equals( "int" )) {
            return Integer.TYPE;
        } else if (name.equals( "char" )) {
            return Character.TYPE;
        } else if (name.equals( "byte" )) {
            return Byte.TYPE;
        } else if (name.equals( "double" )) {
            return Byte.TYPE;
        } else if (name.equals( "float" )) {
            return Byte.TYPE;
        } else if (name.equals( "long" )) {
            return Long.TYPE;
        } else if (name.equals( "short" )) {
            return Short.TYPE;
        } else if (name.equals( "boolean" )) {
            return Boolean.TYPE;
        } else {
            return null;
        } 
    } 
    
}