1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.videoeditor.service;
18
19import java.util.ArrayList;
20import java.util.List;
21
22import android.content.ComponentName;
23import android.content.Context;
24import android.content.Intent;
25import android.os.Bundle;
26import android.util.Log;
27
28/**
29 * A pool of Intents
30 */
31class IntentPool {
32    // Logging
33    private static final String TAG = "IntentPool";
34
35    // Instance variables
36    private final List<Intent> mIntentPool;
37
38    /**
39     * Constructor
40     *
41     * @param initialSize The initial size of the pool
42     */
43    public IntentPool(int initialSize) {
44        mIntentPool = new ArrayList<Intent>(initialSize);
45    }
46
47    /**
48     * @return The Intent is retrieved from the pool or if the pool is empty
49     *      a new Intent is allocated
50     */
51    public synchronized Intent get(Context context, Class<?> cls) {
52        final Intent intent = get();
53        intent.setComponent(new ComponentName(context, cls));
54        return intent;
55    }
56
57    /**
58     * @return The Intent is retrieved from the pool or if the pool is empty
59     *      a new Intent is allocated
60     */
61    public synchronized Intent get() {
62        if (mIntentPool.size() > 0) {
63            final Intent intent = mIntentPool.remove(0);
64            // Clear the content of the Intent
65            final Bundle extras = intent.getExtras();
66            for (String keys : extras.keySet()) {
67                intent.removeExtra(keys);
68            }
69            intent.setComponent(null);
70            return intent;
71        } else {
72            if (Log.isLoggable(TAG, Log.DEBUG)) {
73                Log.d(TAG, "Pool enlarged");
74            }
75            return new Intent();
76        }
77    }
78
79    /**
80     * @param intent Return an Intent to the pool
81     */
82    public synchronized void put(Intent intent) {
83        mIntentPool.add(intent);
84    }
85}
86