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69 lines
2.4 KiB
69 lines
2.4 KiB
5 years ago
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/*
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* Javassist, a Java-bytecode translator toolkit.
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* Copyright (C) 1999- Shigeru Chiba. All Rights Reserved.
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. Alternatively, the contents of this file may be used under
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* the terms of the GNU Lesser General Public License Version 2.1 or later,
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* or the Apache License Version 2.0.
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*/
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package com.fr.third.javassist;
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import java.io.InputStream;
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import java.net.URL;
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/**
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* <code>ClassPath</code> is an interface implemented by objects
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* representing a class search path.
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* <code>ClassPool</code> uses those objects for reading class files.
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*
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* <p>The users can define a class implementing this interface so that
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* a class file is obtained from a non-standard source.
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*
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* @see ClassPool#insertClassPath(ClassPath)
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* @see ClassPool#appendClassPath(ClassPath)
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* @see ClassPool#removeClassPath(ClassPath)
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*/
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public interface ClassPath {
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/**
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* Opens a class file.
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* This method may be called just to examine whether the class file
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* exists as well as to read the contents of the file.
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*
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* <p>This method can return null if the specified class file is not
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* found. If null is returned, the next search path is examined.
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* However, if an error happens, this method must throw an exception
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* so that the search will be terminated.
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*
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* <p>This method should not modify the contents of the class file.
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*
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* @param classname a fully-qualified class name
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* @return the input stream for reading a class file
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* @see Translator
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*/
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InputStream openClassfile(String classname) throws NotFoundException;
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/**
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* Returns the uniform resource locator (URL) of the class file
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* with the specified name.
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*
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* @param classname a fully-qualified class name.
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* @return null if the specified class file could not be found.
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*/
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URL find(String classname);
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/**
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* This method is invoked when the <code>ClassPath</code> object is
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* detached from the search path. It will be an empty method in most of
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* classes.
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*/
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void close();
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}
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