Initial commit from Gmail's Cache system.

Change-Id: I14168ab3bc02b77399a1812f62bd77ac797232c5

1 files changed, 37 insertions, 0 deletions

diff --git a/src/com/android/bitmap/PooledCache.java b/src/com/android/bitmap/PooledCache.java
new file mode 100644
index 0000000..6d6684f
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+++ b/src/com/android/bitmap/PooledCache.java
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+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.bitmap;
+
+public interface PooledCache<K, V> {
+
+    V get(K key, boolean incrementRefCount);
+    V put(K key, V value);
+    void offer(V scrapValue);
+    V poll();
+    String toDebugString();
+
+    /**
+     * Purge existing Poolables from the pool+cache. Usually, this is done when situations
+     * change and the items in the pool+cache are no longer appropriate. For example,
+     * if the layout changes, the pool+cache may need to hold larger bitmaps.
+     *
+     * <p/>
+     * The existing Poolables will be garbage collected when they are no longer being referenced
+     * by other objects.
+     */
+    void clear();
+}