1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/*
* Copyright (C) 2012 Google Inc.
* Licensed to 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.mail.utils;
import android.content.ContentProvider;
import android.content.ContentProviderOperation;
import android.content.ContentProviderResult;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.net.Uri;
import android.os.AsyncTask;
import com.google.common.collect.Lists;
import java.util.ArrayList;
/**
* Simple utility class to make an asynchronous {@link ContentProvider} request expressed as
* a list of {@link ContentProviderOperation}s. As with all {@link AsyncTask}s, subclasses should
* override {@link #onPostExecute(Object)} to handle success/failure.
*
* @see InsertTask
* @see UpdateTask
* @see DeleteTask
*
*/
public class ContentProviderTask extends AsyncTask<Void, Void, ContentProviderTask.Result> {
private ContentResolver mResolver;
private String mAuthority;
private ArrayList<ContentProviderOperation> mOps;
private static final String LOG_TAG = LogTag.getLogTag();
public static class Result {
public final Exception exception;
public final ContentProviderResult[] results;
/**
* Create a new result.
* @param exception
* @param results
*/
private Result(Exception exception, ContentProviderResult[] results) {
this.exception = exception;
this.results = results;
}
/**
* Create a new success result.
* @param success
* @return
*/
private static Result newSuccess(ContentProviderResult[] success) {
return new Result(null, success);
}
/**
* Create a new failure result.
* @param failure
*/
private static Result newFailure(Exception failure) {
return new Result(failure, null);
}
}
@Override
protected Result doInBackground(Void... params) {
Result result;
try {
result = Result.newSuccess(mResolver.applyBatch(mAuthority, mOps));
} catch (Exception e) {
LogUtils.w(LOG_TAG, e, "exception executing ContentProviderOperationsTask");
result = Result.newFailure(e);
}
return result;
}
public void run(ContentResolver resolver, String authority,
ArrayList<ContentProviderOperation> ops) {
mResolver = resolver;
mAuthority = authority;
mOps = ops;
executeOnExecutor(THREAD_POOL_EXECUTOR, (Void) null);
}
public static class InsertTask extends ContentProviderTask {
public void run(ContentResolver resolver, Uri uri, ContentValues values) {
final ContentProviderOperation op = ContentProviderOperation
.newInsert(uri)
.withValues(values)
.build();
super.run(resolver, uri.getAuthority(), Lists.newArrayList(op));
}
}
public static class UpdateTask extends ContentProviderTask {
public void run(ContentResolver resolver, Uri uri, ContentValues values,
String selection, String[] selectionArgs) {
final ContentProviderOperation op = ContentProviderOperation
.newUpdate(uri)
.withValues(values)
.withSelection(selection, selectionArgs)
.build();
super.run(resolver, uri.getAuthority(), Lists.newArrayList(op));
}
}
public static class DeleteTask extends ContentProviderTask {
public void run(ContentResolver resolver, Uri uri, String selection,
String[] selectionArgs) {
final ContentProviderOperation op = ContentProviderOperation
.newDelete(uri)
.withSelection(selection, selectionArgs)
.build();
super.run(resolver, uri.getAuthority(), Lists.newArrayList(op));
}
}
}
|
