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-rw-r--r--WallpaperPicker/src/android/util/Pools.java165
1 files changed, 0 insertions, 165 deletions
diff --git a/WallpaperPicker/src/android/util/Pools.java b/WallpaperPicker/src/android/util/Pools.java
deleted file mode 100644
index 40bab1e..0000000
--- a/WallpaperPicker/src/android/util/Pools.java
+++ /dev/null
@@ -1,165 +0,0 @@
-/*
- * Copyright (C) 2009 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 android.util;
-
-/**
- * Helper class for crating pools of objects. An example use looks like this:
- * <pre>
- * public class MyPooledClass {
- *
- * private static final SynchronizedPool<MyPooledClass> sPool =
- * new SynchronizedPool<MyPooledClass>(10);
- *
- * public static MyPooledClass obtain() {
- * MyPooledClass instance = sPool.acquire();
- * return (instance != null) ? instance : new MyPooledClass();
- * }
- *
- * public void recycle() {
- * // Clear state if needed.
- * sPool.release(this);
- * }
- *
- * . . .
- * }
- * </pre>
- *
- * @hide
- */
-public final class Pools {
-
- /**
- * Interface for managing a pool of objects.
- *
- * @param <T> The pooled type.
- */
- public static interface Pool<T> {
-
- /**
- * @return An instance from the pool if such, null otherwise.
- */
- public T acquire();
-
- /**
- * Release an instance to the pool.
- *
- * @param instance The instance to release.
- * @return Whether the instance was put in the pool.
- *
- * @throws IllegalStateException If the instance is already in the pool.
- */
- public boolean release(T instance);
- }
-
- private Pools() {
- /* do nothing - hiding constructor */
- }
-
- /**
- * Simple (non-synchronized) pool of objects.
- *
- * @param <T> The pooled type.
- */
- public static class SimplePool<T> implements Pool<T> {
- private final Object[] mPool;
-
- private int mPoolSize;
-
- /**
- * Creates a new instance.
- *
- * @param maxPoolSize The max pool size.
- *
- * @throws IllegalArgumentException If the max pool size is less than zero.
- */
- public SimplePool(int maxPoolSize) {
- if (maxPoolSize <= 0) {
- throw new IllegalArgumentException("The max pool size must be > 0");
- }
- mPool = new Object[maxPoolSize];
- }
-
- @Override
- @SuppressWarnings("unchecked")
- public T acquire() {
- if (mPoolSize > 0) {
- final int lastPooledIndex = mPoolSize - 1;
- T instance = (T) mPool[lastPooledIndex];
- mPool[lastPooledIndex] = null;
- mPoolSize--;
- return instance;
- }
- return null;
- }
-
- @Override
- public boolean release(T instance) {
- if (isInPool(instance)) {
- throw new IllegalStateException("Already in the pool!");
- }
- if (mPoolSize < mPool.length) {
- mPool[mPoolSize] = instance;
- mPoolSize++;
- return true;
- }
- return false;
- }
-
- private boolean isInPool(T instance) {
- for (int i = 0; i < mPoolSize; i++) {
- if (mPool[i] == instance) {
- return true;
- }
- }
- return false;
- }
- }
-
- /**
- * Synchronized) pool of objects.
- *
- * @param <T> The pooled type.
- */
- public static class SynchronizedPool<T> extends SimplePool<T> {
- private final Object mLock = new Object();
-
- /**
- * Creates a new instance.
- *
- * @param maxPoolSize The max pool size.
- *
- * @throws IllegalArgumentException If the max pool size is less than zero.
- */
- public SynchronizedPool(int maxPoolSize) {
- super(maxPoolSize);
- }
-
- @Override
- public T acquire() {
- synchronized (mLock) {
- return super.acquire();
- }
- }
-
- @Override
- public boolean release(T element) {
- synchronized (mLock) {
- return super.release(element);
- }
- }
- }
-} \ No newline at end of file