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Amazon Web Services SDK for Android
/**
* Copyright 2015-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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.amazonaws.mobileconnectors.s3.transferutility;
import android.content.ContentValues;
import android.content.Context;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteQueryBuilder;
import android.net.Uri;
import android.text.TextUtils;
import android.util.Log;
/**
* Provides methods to access database through which applications can interact
* with transfer tasks.
*/
class TransferDBBase {
private static final int TRANSFERS = 10;
private static final int TRANSFER_ID = 20;
private static final int TRANSFER_PART = 30;
private static final int TRANSFER_STATE = 40;
private static final String BASE_PATH = "transfers";
private final Context context;
private final Uri contentUri;
private final UriMatcher uriMatcher;
private final TransferDatabaseHelper databaseHelper;
/**
* Constructs TransferDBBase with the given Context.
*
* @param context A Context instance.
*/
public TransferDBBase(Context context) {
this.context = context;
String mAuthority = context.getApplicationContext().getPackageName();
databaseHelper = new TransferDatabaseHelper(this.context);
contentUri = Uri.parse("content://" + mAuthority + "/" + BASE_PATH);
uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
/*
* The Uri of TRANSFERS is for all records in the table.
*/
uriMatcher.addURI(mAuthority, BASE_PATH, TRANSFERS);
/*
* The Uri of TRANSFER_ID is for a single transfer record.
*/
uriMatcher.addURI(mAuthority, BASE_PATH + "/#", TRANSFER_ID);
/*
* The Uri of TRANSFER_PART is for part records of a multipart upload.
*/
uriMatcher.addURI(mAuthority, BASE_PATH + "/part/#", TRANSFER_PART);
/*
* The Uri of TRANSFER_STATE is for records with a specific state.
*/
uriMatcher.addURI(mAuthority, BASE_PATH + "/state/*", TRANSFER_STATE);
}
/**
* Closes the database helper.
*/
public void closeDBHelper() {
databaseHelper.close();
}
/**
* Gets the Uri for the table.
*
* @return The Uri for the table.
*/
public Uri getContentUri() {
return contentUri;
}
/**
* Inserts a record to the table.
*
* @param uri The Uri of a table.
* @param values The values of a record.
* @return The Uri of the inserted record.
*/
public Uri insert(Uri uri, ContentValues values) {
int uriType = uriMatcher.match(uri);
SQLiteDatabase db = databaseHelper.getWritableDatabase();
long id = 0;
switch (uriType) {
case TRANSFERS:
id = db.insert(TransferTable.TABLE_TRANSFER, null, values);
break;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
return Uri.parse(BASE_PATH + "/" + id);
}
/**
* Query records from the database.
*
* @param uri A Uri indicating which part of data to query.
* @param projection The projection of columns.
* @param selection The "where" clause of sql.
* @param selectionArgs Strings in the "where" clause.
* @param sortOrder Sorting order of the query.
* @param type Type of transfers to query.
* @return A Cursor pointing to records.
*/
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
String sortOrder) {
SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();
// TODO: currently all methods calling this pass null to projection.
// In the future we want to update projection to be more specific for
// performance and must handle that here.
queryBuilder.setTables(TransferTable.TABLE_TRANSFER);
int uriType = uriMatcher.match(uri);
switch (uriType) {
case TRANSFERS:
queryBuilder.appendWhere(TransferTable.COLUMN_PART_NUM + "=" + 0);
break;
case TRANSFER_ID:
queryBuilder.appendWhere(TransferTable.COLUMN_ID + "=" + uri.getLastPathSegment());
break;
case TRANSFER_PART:
queryBuilder.appendWhere(TransferTable.COLUMN_MAIN_UPLOAD_ID + "="
+ uri.getLastPathSegment());
break;
case TRANSFER_STATE:
queryBuilder.appendWhere(TransferTable.COLUMN_STATE + "=");
queryBuilder.appendWhereEscapeString(uri.getLastPathSegment());
break;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
SQLiteDatabase db = databaseHelper.getWritableDatabase();
Cursor cursor = queryBuilder.query(db, projection, selection, selectionArgs, null, null,
sortOrder);
return cursor;
}
/**
* Updates records in the table synchronously.
*
* @param uri A Uri of the specific record.
* @param values The values to update.
* @param whereClause The "where" clause of sql.
* @param whereArgs Strings in the "where" clause.
* @return Number of rows updated.
*/
public synchronized int update(Uri uri, ContentValues values, String whereClause,
String[] whereArgs) {
int uriType = uriMatcher.match(uri);
SQLiteDatabase db = databaseHelper.getWritableDatabase();
int rowsUpdated = 0;
switch (uriType) {
case TRANSFERS:
rowsUpdated = db.update(TransferTable.TABLE_TRANSFER, values, whereClause,
whereArgs);
break;
case TRANSFER_ID:
String id = uri.getLastPathSegment();
if (TextUtils.isEmpty(whereClause)) {
rowsUpdated = db.update(TransferTable.TABLE_TRANSFER, values,
TransferTable.COLUMN_ID + "=" + id, null);
} else {
rowsUpdated = db
.update(TransferTable.TABLE_TRANSFER, values, TransferTable.COLUMN_ID
+ "=" + id + " and " + whereClause, whereArgs);
}
break;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
return rowsUpdated;
}
/**
* Deletes a record in the table.
*
* @param uri A Uri of the specific record.
* @param selection The "where" clause of sql.
* @param selectionArgs Strings in the "where" clause.
* @return Number of rows deleted.
*/
public int delete(Uri uri, String selection, String[] selectionArgs) {
int uriType = uriMatcher.match(uri);
SQLiteDatabase db = databaseHelper.getWritableDatabase();
int rowsDeleted = 0;
switch (uriType) {
case TRANSFERS:
rowsDeleted = db.delete(TransferTable.TABLE_TRANSFER, selection, selectionArgs);
break;
case TRANSFER_ID:
String id = uri.getLastPathSegment();
if (TextUtils.isEmpty(selection)) {
rowsDeleted = db.delete(TransferTable.TABLE_TRANSFER,
TransferTable.COLUMN_ID + "=" + id, null);
} else {
rowsDeleted = db
.delete(TransferTable.TABLE_TRANSFER, TransferTable.COLUMN_ID + "="
+ id + " and " + selection, selectionArgs);
}
break;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
return rowsDeleted;
}
/**
* @param uri The Uri of a table.
* @param valuesArray A array of values to insert.
* @return Number of rows inserted.
*/
public int bulkInsert(Uri uri, ContentValues[] valuesArray) {
int uriType = uriMatcher.match(uri);
SQLiteDatabase db = databaseHelper.getWritableDatabase();
int mainUploadId = 0;
switch (uriType) {
case TRANSFERS:
try {
db.beginTransaction();
mainUploadId = (int) db.insertOrThrow(TransferTable.TABLE_TRANSFER, null,
valuesArray[0]);
for (int i = 1; i < valuesArray.length; i++) {
valuesArray[i].put(TransferTable.COLUMN_MAIN_UPLOAD_ID, mainUploadId);
db.insertOrThrow(TransferTable.TABLE_TRANSFER, null, valuesArray[i]);
}
db.setTransactionSuccessful();
} catch (Exception e) {
Log.e(TransferDBBase.class.getSimpleName(),
"bulkInsert error : " + e.getMessage());
} finally {
db.endTransaction();
}
break;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
return mainUploadId;
}
}
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