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/*
* Javassist, a Java-bytecode translator toolkit.
* Copyright (C) 1999-2003 Shigeru Chiba. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*/
package javassist;
import java.io.InputStream;
/**
* <code>ClassPath</code> is an interface implemented by objects
* representing a class search path.
* <code>ClassPool</code> uses those objects for reading class files.
*
* <code>The users can define a class implementing this interface so that
* a class file is obtained from a non-standard source.
*
* @see ClassPool#insertClassPath(ClassPath)
* @see ClassPool#appendClassPath(ClassPath)
* @see ClassPool#removeClassPath(ClassPath)
*/
public interface ClassPath {
/**
* Opens a class file.
*
* <p>This method can return null if the specified class file is not
* found. If null is returned, the next search path is examined.
* However, if an error happens, this method must throw an exception
* so that the search is terminated.
*
* <p>This method should not modify the contents of the class file.
*
* @param classname a fully-qualified class name
* @return the input stream for reading a class file
*/
InputStream openClassfile(String classname) throws NotFoundException;
/**
* This method is invoked when the <code>ClassPath</code> object is
* detached from the search path. It will be an empty method in most of
* classes.
*/
void close();
}
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