44 lines
1.8 KiB
Java
44 lines
1.8 KiB
Java
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/* GENERATED SOURCE. DO NOT MODIFY. */
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// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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* Copyright (C) 2010, International Business Machines
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* Corporation and others. All Rights Reserved.
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*******************************************************************************
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*/
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package android.icu.impl;
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/**
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* Base class for cache implementations.
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* To use, instantiate a subclass of a concrete implementation class, where the subclass
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* implements the createInstance() method, and call get() with the key and the data.
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* The get() call will use the data only if it needs to call createInstance(),
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* otherwise the data is ignored.
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*
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* @param <K> Cache lookup key type
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* @param <V> Cache instance value type
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* @param <D> Data type for creating a new instance value
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*
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* @author Markus Scherer, Mark Davis
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* @hide Only a subset of ICU is exposed in Android
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*/
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public abstract class CacheBase<K, V, D> {
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/**
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* Retrieves an instance from the cache. Calls createInstance(key, data) if the cache
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* does not already contain an instance with this key.
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* Ignores data if the cache already contains an instance with this key.
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* @param key Cache lookup key for the requested instance
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* @param data Data for createInstance() if the instance is not already cached
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* @return The requested instance
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*/
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public abstract V getInstance(K key, D data);
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/**
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* Creates an instance for the key and data. Must be overridden.
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* @param key Cache lookup key for the requested instance
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* @param data Data for the instance creation
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* @return The requested instance
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*/
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protected abstract V createInstance(K key, D data);
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}
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