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Source code of the class CacheKeyResolver.java part of aspectjweaver version 1.8.9

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        /*******************************************************************************
 * Copyright (c) 2012 Contributors.
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution and is available at
 * http://eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   John Kew (vmware)         initial implementation
 *******************************************************************************/

package org.aspectj.weaver.tools.cache;

import java.util.List;

/**
 * Interface to allow alternate hashing schemes for weaved and
 * generated classes. While the DefaultCacheKeyResolver may be
 * a reasonable naive implementation, the management and invalidation
 * of the cache may be more usefully accomplished at the Application
 * or Container level.
 * 

* The key is not a one-way hash; it must be convertible back to a * className and must match the regex for the type of key it is * (generated or weaved). */ public interface CacheKeyResolver { /** * Create a key for the given className from a class generated by * the weaver such that: *

	 *    className == keyToClass(generatedKey(className)) holds
	 * and
	 *    generatedKey(className).matches(getGeneratedRegex()) == true
	 * 
* * @param className class to create a key for * @return key for the class, or null if no caching should be performed */ CachedClassReference generatedKey(String className); /** * Create a key for the given class name and byte array from the pre-weaved * class such that *
	 *    className == keyToClass(weavedKey(className, various_bytes)) holds
	 * and
	 *    weavedKey(className, various_bytes).matches(getWeavedRegex()) == true
	 * 
* * @param className class to create a key for * @param original_bytes bytes of the pre-weaved class * @return key for the class, or null if no caching should be performed */ CachedClassReference weavedKey(String className, byte[] original_bytes); /** * Convert a key back to a className * * @param key cache key * @return className */ String keyToClass(String key); /** * Create a unique string for the given classpath and aspect list * * @param loader Classloader for this adapter * @param aspects list of aspects; either urls or class names handled by this adapter * @return scope, or null, if no caching should be performed for this classloader */ String createClassLoaderScope(ClassLoader loader, List aspects); /** * Return a regex which matches all generated keys * * @return string regex */ String getGeneratedRegex(); /** * Return a regex which matches all weaved keys; * * @return string regex */ String getWeavedRegex(); }




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