83 lines
2.2 KiB
Java
83 lines
2.2 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) 2007-2015 International Business Machines Corporation and *
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* others. All rights reserved. *
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****************************************************************************
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*/
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package android.icu.impl;
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import java.lang.ref.Reference;
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import java.lang.ref.SoftReference;
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import java.lang.ref.WeakReference;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* @hide Only a subset of ICU is exposed in Android
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*/
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public class SimpleCache<K, V> implements ICUCache<K, V> {
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private static final int DEFAULT_CAPACITY = 16;
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private volatile Reference<Map<K, V>> cacheRef = null;
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private int type = ICUCache.SOFT;
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private int capacity = DEFAULT_CAPACITY;
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public SimpleCache() {
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}
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public SimpleCache(int cacheType) {
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this(cacheType, DEFAULT_CAPACITY);
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}
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public SimpleCache(int cacheType, int initialCapacity) {
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if (cacheType == ICUCache.WEAK) {
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type = cacheType;
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}
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if (initialCapacity > 0) {
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capacity = initialCapacity;
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}
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}
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@Override
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public V get(Object key) {
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Reference<Map<K, V>> ref = cacheRef;
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if (ref != null) {
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Map<K, V> map = ref.get();
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if (map != null) {
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return map.get(key);
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}
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}
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return null;
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}
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@Override
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public void put(K key, V value) {
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Reference<Map<K, V>> ref = cacheRef;
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Map<K, V> map = null;
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if (ref != null) {
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map = ref.get();
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}
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if (map == null) {
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map = Collections.synchronizedMap(new HashMap<K, V>(capacity));
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if (type == ICUCache.WEAK) {
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ref = new WeakReference<Map<K, V>>(map);
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} else {
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ref = new SoftReference<Map<K, V>>(map);
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}
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cacheRef = ref;
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}
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map.put(key, value);
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}
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@Override
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public void clear() {
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cacheRef = null;
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}
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}
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