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 * The AIBench Shell Plugin
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/*****************************************************************************
 *                                                                           *
 *  This file is part of the BeanShell Java Scripting distribution.          *
 *  Documentation and updates may be found at http://www.beanshell.org/      *
 *                                                                           *
 *  Sun Public License Notice:                                               *
 *                                                                           *
 *  The contents of this file are subject to the Sun Public License Version  *
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 *                                                                           *
 *  The Original Code is BeanShell. The Initial Developer of the Original    *
 *  Code is Pat Niemeyer. Portions created by Pat Niemeyer are Copyright     *
 *  (C) 2000.  All Rights Reserved.                                          *
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 *                                                                           *
 *  Patrick Niemeyer ([email protected])                                           *
 *  Author of Learning Java, O'Reilly & Associates                           *
 *  http://www.pat.net/~pat/                                                 *
 *                                                                           *
 *****************************************************************************/

package bsh.classpath;

import java.util.HashMap;

import bsh.BshClassManager;
import bsh.classpath.BshClassPath.ClassSource;

/**
 * A classloader which can load one or more classes from specified sources.
 * Because the classes are loaded via a single classloader they change as a
 * group and any versioning cross dependencies can be managed.
 */
public class DiscreteFilesClassLoader extends BshClassLoader {
        /**
         * Map of class sources which also implies our coverage space.
         */
        ClassSourceMap map;

        public static class ClassSourceMap extends HashMap {
                public void put(String name, ClassSource source) {
                        super.put(name, source);
                }

                public ClassSource get(String name) {
                        return (ClassSource) super.get(name);
                }
        }

        public DiscreteFilesClassLoader(BshClassManager classManager, ClassSourceMap map) {
                super(classManager);
                this.map = map;
        }

        /**
         */
        public Class findClass(String name) throws ClassNotFoundException {
                // Load it if it's one of our classes
                ClassSource source = map.get(name);

                if (source != null) {
                        byte[] code = source.getCode(name);
                        return defineClass(name, code, 0, code.length);
                } else
                        // Let superclass BshClassLoader (URLClassLoader)
                        // findClass try
                        // to find the class...
                        return super.findClass(name);
        }

        public String toString() {
                return super.toString() + "for files: " + map;
        }

}