177 lines
7.4 KiB
Java
177 lines
7.4 KiB
Java
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/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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package android.provider;
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import android.net.Uri;
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import android.content.ContentProviderClient;
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import android.content.ContentValues;
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import android.content.ContentProviderOperation;
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import android.content.ContentUris;
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import android.accounts.Account;
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import android.database.Cursor;
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import android.os.RemoteException;
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import android.util.Pair;
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/**
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* The ContentProvider contract for associating data with ana data array account.
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* This may be used by providers that want to store this data in a standard way.
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*/
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public class SyncStateContract {
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public interface Columns extends BaseColumns {
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/**
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* A reference to the name of the account to which this data belongs
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* <P>Type: STRING</P>
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*/
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public static final String ACCOUNT_NAME = "account_name";
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/**
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* A reference to the type of the account to which this data belongs
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* <P>Type: STRING</P>
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*/
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public static final String ACCOUNT_TYPE = "account_type";
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/**
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* The sync data associated with this account.
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* <P>Type: NONE</P>
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*/
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public static final String DATA = "data";
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}
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public static class Constants implements Columns {
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public static final String CONTENT_DIRECTORY = "syncstate";
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}
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public static final class Helpers {
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private static final String[] DATA_PROJECTION = new String[]{Columns.DATA, Columns._ID};
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private static final String SELECT_BY_ACCOUNT =
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Columns.ACCOUNT_NAME + "=? AND " + Columns.ACCOUNT_TYPE + "=?";
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/**
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* Get the sync state that is associated with the account or null.
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* @param provider the {@link ContentProviderClient} that is to be used to communicate
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* with the {@link android.content.ContentProvider} that contains the sync state.
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* @param uri the uri of the sync state
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* @param account the {@link Account} whose sync state should be returned
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* @return the sync state or null if there is no sync state associated with the account
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* @throws RemoteException if there is a failure communicating with the remote
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* {@link android.content.ContentProvider}
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*/
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public static byte[] get(ContentProviderClient provider, Uri uri,
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Account account) throws RemoteException {
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Cursor c = provider.query(uri, DATA_PROJECTION, SELECT_BY_ACCOUNT,
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new String[]{account.name, account.type}, null);
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try {
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if (c.moveToNext()) {
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return c.getBlob(c.getColumnIndexOrThrow(Columns.DATA));
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}
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} finally {
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c.close();
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}
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return null;
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}
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/**
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* Assigns the data array as the sync state for the given account.
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* @param provider the {@link ContentProviderClient} that is to be used to communicate
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* with the {@link android.content.ContentProvider} that contains the sync state.
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* @param uri the uri of the sync state
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* @param account the {@link Account} whose sync state should be set
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* @param data the byte[] that contains the sync state
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* @throws RemoteException if there is a failure communicating with the remote
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* {@link android.content.ContentProvider}
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*/
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public static void set(ContentProviderClient provider, Uri uri,
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Account account, byte[] data) throws RemoteException {
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ContentValues values = new ContentValues();
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values.put(Columns.DATA, data);
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values.put(Columns.ACCOUNT_NAME, account.name);
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values.put(Columns.ACCOUNT_TYPE, account.type);
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provider.insert(uri, values);
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}
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public static Uri insert(ContentProviderClient provider, Uri uri,
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Account account, byte[] data) throws RemoteException {
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ContentValues values = new ContentValues();
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values.put(Columns.DATA, data);
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values.put(Columns.ACCOUNT_NAME, account.name);
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values.put(Columns.ACCOUNT_TYPE, account.type);
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return provider.insert(uri, values);
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}
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public static void update(ContentProviderClient provider, Uri uri, byte[] data)
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throws RemoteException {
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ContentValues values = new ContentValues();
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values.put(Columns.DATA, data);
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provider.update(uri, values, null, null);
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}
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public static Pair<Uri, byte[]> getWithUri(ContentProviderClient provider, Uri uri,
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Account account) throws RemoteException {
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Cursor c = provider.query(uri, DATA_PROJECTION, SELECT_BY_ACCOUNT,
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new String[]{account.name, account.type}, null);
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try {
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if (c.moveToNext()) {
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long rowId = c.getLong(1);
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byte[] blob = c.getBlob(c.getColumnIndexOrThrow(Columns.DATA));
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return Pair.create(ContentUris.withAppendedId(uri, rowId), blob);
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}
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} finally {
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c.close();
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}
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return null;
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}
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/**
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* Creates and returns a ContentProviderOperation that assigns the data array as the
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* sync state for the given account.
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* @param uri the uri of the sync state
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* @param account the {@link Account} whose sync state should be set
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* @param data the byte[] that contains the sync state
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* @return the new ContentProviderOperation that assigns the data array as the
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* account's sync state
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*/
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public static ContentProviderOperation newSetOperation(Uri uri,
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Account account, byte[] data) {
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ContentValues values = new ContentValues();
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values.put(Columns.DATA, data);
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return ContentProviderOperation
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.newInsert(uri)
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.withValue(Columns.ACCOUNT_NAME, account.name)
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.withValue(Columns.ACCOUNT_TYPE, account.type)
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.withValues(values)
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.build();
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}
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/**
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* Creates and returns a ContentProviderOperation that assigns the data array as the
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* sync state for the given account.
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* @param uri the uri of the specific sync state to set
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* @param data the byte[] that contains the sync state
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* @return the new ContentProviderOperation that assigns the data array as the
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* account's sync state
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*/
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public static ContentProviderOperation newUpdateOperation(Uri uri, byte[] data) {
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ContentValues values = new ContentValues();
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values.put(Columns.DATA, data);
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return ContentProviderOperation
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.newUpdate(uri)
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.withValues(values)
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.build();
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}
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}
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}
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