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      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 
     17 package com.android.gallery3d.data;
     18 
     19 import android.net.Uri;
     20 
     21 public abstract class MediaObject {
     22     @SuppressWarnings("unused")
     23     private static final String TAG = "MediaObject";
     24     public static final long INVALID_DATA_VERSION = -1;
     25 
     26     // These are the bits returned from getSupportedOperations():
     27     public static final int SUPPORT_DELETE = 1 << 0;
     28     public static final int SUPPORT_ROTATE = 1 << 1;
     29     public static final int SUPPORT_SHARE = 1 << 2;
     30     public static final int SUPPORT_CROP = 1 << 3;
     31     public static final int SUPPORT_SHOW_ON_MAP = 1 << 4;
     32     public static final int SUPPORT_SETAS = 1 << 5;
     33     public static final int SUPPORT_FULL_IMAGE = 1 << 6;
     34     public static final int SUPPORT_PLAY = 1 << 7;
     35     public static final int SUPPORT_CACHE = 1 << 8;
     36     public static final int SUPPORT_EDIT = 1 << 9;
     37     public static final int SUPPORT_INFO = 1 << 10;
     38     public static final int SUPPORT_IMPORT = 1 << 11;
     39     public static final int SUPPORT_ALL = 0xffffffff;
     40 
     41     // These are the bits returned from getMediaType():
     42     public static final int MEDIA_TYPE_UNKNOWN = 1;
     43     public static final int MEDIA_TYPE_IMAGE = 2;
     44     public static final int MEDIA_TYPE_VIDEO = 4;
     45     public static final int MEDIA_TYPE_ALL = MEDIA_TYPE_IMAGE | MEDIA_TYPE_VIDEO;
     46 
     47     // These are flags for cache() and return values for getCacheFlag():
     48     public static final int CACHE_FLAG_NO = 0;
     49     public static final int CACHE_FLAG_SCREENNAIL = 1;
     50     public static final int CACHE_FLAG_FULL = 2;
     51 
     52     // These are return values for getCacheStatus():
     53     public static final int CACHE_STATUS_NOT_CACHED = 0;
     54     public static final int CACHE_STATUS_CACHING = 1;
     55     public static final int CACHE_STATUS_CACHED_SCREENNAIL = 2;
     56     public static final int CACHE_STATUS_CACHED_FULL = 3;
     57 
     58     private static long sVersionSerial = 0;
     59 
     60     protected long mDataVersion;
     61 
     62     protected final Path mPath;
     63 
     64     public MediaObject(Path path, long version) {
     65         path.setObject(this);
     66         mPath = path;
     67         mDataVersion = version;
     68     }
     69 
     70     public Path getPath() {
     71         return mPath;
     72     }
     73 
     74     public int getSupportedOperations() {
     75         return 0;
     76     }
     77 
     78     public void delete() {
     79         throw new UnsupportedOperationException();
     80     }
     81 
     82     public void rotate(int degrees) {
     83         throw new UnsupportedOperationException();
     84     }
     85 
     86     public Uri getContentUri() {
     87         throw new UnsupportedOperationException();
     88     }
     89 
     90     public Uri getPlayUri() {
     91         throw new UnsupportedOperationException();
     92     }
     93 
     94     public int getMediaType() {
     95         return MEDIA_TYPE_UNKNOWN;
     96     }
     97 
     98     public boolean Import() {
     99         throw new UnsupportedOperationException();
    100     }
    101 
    102     public MediaDetails getDetails() {
    103         MediaDetails details = new MediaDetails();
    104         return details;
    105     }
    106 
    107     public long getDataVersion() {
    108         return mDataVersion;
    109     }
    110 
    111     public int getCacheFlag() {
    112         return CACHE_FLAG_NO;
    113     }
    114 
    115     public int getCacheStatus() {
    116         throw new UnsupportedOperationException();
    117     }
    118 
    119     public long getCacheSize() {
    120         throw new UnsupportedOperationException();
    121     }
    122 
    123     public void cache(int flag) {
    124         throw new UnsupportedOperationException();
    125     }
    126 
    127     public static synchronized long nextVersionNumber() {
    128         return ++MediaObject.sVersionSerial;
    129     }
    130 }
    131