src/com/android/messaging/datamodel/MessagingContentProvider.java - LeafOS-Project/android_packages_apps_Messaging - Gitiles

 /*
  * Copyright (C) 2015 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.messaging.datamodel;

 import android.content.ContentProvider;
 import android.content.ContentResolver;
 import android.content.ContentValues;
 import android.content.Context;
 import android.content.UriMatcher;
 import android.database.Cursor;
 import android.database.sqlite.SQLiteQueryBuilder;
 import android.net.Uri;
 import android.os.ParcelFileDescriptor;
 import android.text.TextUtils;

 import com.android.messaging.BugleApplication;
 import com.android.messaging.Factory;
 import com.android.messaging.datamodel.DatabaseHelper.ConversationColumns;
 import com.android.messaging.datamodel.DatabaseHelper.ConversationParticipantsColumns;
 import com.android.messaging.datamodel.DatabaseHelper.ParticipantColumns;
 import com.android.messaging.datamodel.data.ConversationListItemData;
 import com.android.messaging.datamodel.data.ConversationMessageData;
 import com.android.messaging.datamodel.data.MessageData;
 import com.android.messaging.datamodel.data.ParticipantData;
 import com.android.messaging.util.Assert;
 import com.android.messaging.util.LogUtil;
 import com.android.messaging.util.OsUtil;
 import com.android.messaging.util.PhoneUtils;
 import com.android.messaging.widget.BugleWidgetProvider;
 import com.android.messaging.widget.WidgetConversationProvider;
 import com.google.common.annotations.VisibleForTesting;

 import java.io.FileDescriptor;
 import java.io.FileNotFoundException;
 import java.io.PrintWriter;

 /**
  * A centralized provider for Uris exposed by Bugle.
  *  */
 public class MessagingContentProvider extends ContentProvider {
     private static final String TAG = LogUtil.BUGLE_TAG;

     @VisibleForTesting
     public static final String AUTHORITY =
             "com.android.messaging.datamodel.MessagingContentProvider";
     private static final String CONTENT_AUTHORITY = "content://" + AUTHORITY + '/';

     // Conversations query
     private static final String CONVERSATIONS_QUERY = "conversations";

     public static final Uri CONVERSATIONS_URI = Uri.parse(CONTENT_AUTHORITY + CONVERSATIONS_QUERY);
     static final Uri PARTS_URI = Uri.parse(CONTENT_AUTHORITY + DatabaseHelper.PARTS_TABLE);

     // Messages query
     private static final String MESSAGES_QUERY = "messages";

     static final Uri MESSAGES_URI = Uri.parse(CONTENT_AUTHORITY + MESSAGES_QUERY);

     public static final Uri CONVERSATION_MESSAGES_URI = Uri.parse(CONTENT_AUTHORITY +
             MESSAGES_QUERY + "/conversation");

     // Conversation participants query
     private static final String PARTICIPANTS_QUERY = "participants";

     static class ConversationParticipantsQueryColumns extends ParticipantColumns {
         static final String CONVERSATION_ID = ConversationParticipantsColumns.CONVERSATION_ID;
     }

     static final Uri CONVERSATION_PARTICIPANTS_URI = Uri.parse(CONTENT_AUTHORITY +
             PARTICIPANTS_QUERY + "/conversation");

     public static final Uri PARTICIPANTS_URI = Uri.parse(CONTENT_AUTHORITY + PARTICIPANTS_QUERY);

     // Conversation images query
     private static final String CONVERSATION_IMAGES_QUERY = "conversation_images";

     public static final Uri CONVERSATION_IMAGES_URI = Uri.parse(CONTENT_AUTHORITY +
             CONVERSATION_IMAGES_QUERY);

     private static final String DRAFT_IMAGES_QUERY = "draft_images";

     public static final Uri DRAFT_IMAGES_URI = Uri.parse(CONTENT_AUTHORITY +
             DRAFT_IMAGES_QUERY);

     /**
      * Notifies that <i>all</i> data exposed by the provider needs to be refreshed.
      * <p>
      * <b>IMPORTANT!</b> You probably shouldn't be calling this. Prefer to notify more specific
      * uri's instead. Currently only sync uses this, because sync can potentially update many
      * different tables at once.
      */
     public static void notifyEverythingChanged() {
         final Uri uri = Uri.parse(CONTENT_AUTHORITY);
         final Context context = Factory.get().getApplicationContext();
         final ContentResolver cr = context.getContentResolver();
         cr.notifyChange(uri, null);

         // Notify any conversations widgets the conversation list has changed.
         BugleWidgetProvider.notifyConversationListChanged(context);

         // Notify all conversation widgets to update.
         WidgetConversationProvider.notifyMessagesChanged(context, null /*conversationId*/);
     }

     /**
      * Build a participant uri from the conversation id.
      */
     public static Uri buildConversationParticipantsUri(final String conversationId) {
         final Uri.Builder builder = CONVERSATION_PARTICIPANTS_URI.buildUpon();
         builder.appendPath(conversationId);
         return builder.build();
     }

     public static void notifyParticipantsChanged(final String conversationId) {
         final Uri uri = buildConversationParticipantsUri(conversationId);
         final ContentResolver cr = Factory.get().getApplicationContext().getContentResolver();
         cr.notifyChange(uri, null);
     }

     public static void notifyAllMessagesChanged() {
         final ContentResolver cr = Factory.get().getApplicationContext().getContentResolver();
         cr.notifyChange(CONVERSATION_MESSAGES_URI, null);
     }

     public static void notifyAllParticipantsChanged() {
         final ContentResolver cr = Factory.get().getApplicationContext().getContentResolver();
         cr.notifyChange(CONVERSATION_PARTICIPANTS_URI, null);
     }

     // Default value for unknown dimension of image
     public static final int UNSPECIFIED_SIZE = -1;

     // Internal
     private static final int CONVERSATIONS_QUERY_CODE = 10;

     private static final int CONVERSATION_QUERY_CODE = 20;
     private static final int CONVERSATION_MESSAGES_QUERY_CODE = 30;
     private static final int CONVERSATION_PARTICIPANTS_QUERY_CODE = 40;
     private static final int CONVERSATION_IMAGES_QUERY_CODE = 50;
     private static final int DRAFT_IMAGES_QUERY_CODE = 60;
     private static final int PARTICIPANTS_QUERY_CODE = 70;

     // TODO: Move to a better structured URI namespace.
     private static final UriMatcher sURIMatcher = new UriMatcher(UriMatcher.NO_MATCH);
     static {
         sURIMatcher.addURI(AUTHORITY, CONVERSATIONS_QUERY, CONVERSATIONS_QUERY_CODE);
         sURIMatcher.addURI(AUTHORITY, CONVERSATIONS_QUERY + "/*", CONVERSATION_QUERY_CODE);
         sURIMatcher.addURI(AUTHORITY, MESSAGES_QUERY + "/conversation/*",
                 CONVERSATION_MESSAGES_QUERY_CODE);
         sURIMatcher.addURI(AUTHORITY, PARTICIPANTS_QUERY + "/conversation/*",
                 CONVERSATION_PARTICIPANTS_QUERY_CODE);
         sURIMatcher.addURI(AUTHORITY, PARTICIPANTS_QUERY, PARTICIPANTS_QUERY_CODE);
         sURIMatcher.addURI(AUTHORITY, CONVERSATION_IMAGES_QUERY + "/*",
                 CONVERSATION_IMAGES_QUERY_CODE);
         sURIMatcher.addURI(AUTHORITY, DRAFT_IMAGES_QUERY + "/*",
                 DRAFT_IMAGES_QUERY_CODE);
     }

     /**
      * Build a messages uri from the conversation id.
      */
     public static Uri buildConversationMessagesUri(final String conversationId) {
         final Uri.Builder builder = CONVERSATION_MESSAGES_URI.buildUpon();
         builder.appendPath(conversationId);
         return builder.build();
     }

     public static void notifyMessagesChanged(final String conversationId) {
         final Uri uri = buildConversationMessagesUri(conversationId);
         final Context context = Factory.get().getApplicationContext();
         final ContentResolver cr = context.getContentResolver();
         cr.notifyChange(uri, null);
         notifyConversationListChanged();

         // Notify the widget the messages changed
         WidgetConversationProvider.notifyMessagesChanged(context, conversationId);
     }

     /**
      * Build a conversation metadata uri from a conversation id.
      */
     public static Uri buildConversationMetadataUri(final String conversationId) {
         final Uri.Builder builder = CONVERSATIONS_URI.buildUpon();
         builder.appendPath(conversationId);
         return builder.build();
     }

     public static void notifyConversationMetadataChanged(final String conversationId) {
         final Uri uri = buildConversationMetadataUri(conversationId);
         final ContentResolver cr = Factory.get().getApplicationContext().getContentResolver();
         cr.notifyChange(uri, null);
         notifyConversationListChanged();
     }

     public static void notifyPartsChanged() {
         final ContentResolver cr = Factory.get().getApplicationContext().getContentResolver();
         cr.notifyChange(PARTS_URI, null);
     }

     public static void notifyConversationListChanged() {
         final Context context = Factory.get().getApplicationContext();
         final ContentResolver cr = context.getContentResolver();
         cr.notifyChange(CONVERSATIONS_URI, null);

         // Notify the widget the conversation list changed
         BugleWidgetProvider.notifyConversationListChanged(context);
     }

     /**
      * Build a conversation images uri from a conversation id.
      */
     public static Uri buildConversationImagesUri(final String conversationId) {
         final Uri.Builder builder = CONVERSATION_IMAGES_URI.buildUpon();
         builder.appendPath(conversationId);
         return builder.build();
     }

     /**
      * Build a draft images uri from a conversation id.
      */
     public static Uri buildDraftImagesUri(final String conversationId) {
         final Uri.Builder builder = DRAFT_IMAGES_URI.buildUpon();
         builder.appendPath(conversationId);
         return builder.build();
     }

     private DatabaseHelper mDatabaseHelper;
     private DatabaseWrapper mDatabaseWrapper;

     public MessagingContentProvider() {
         super();
     }

     @VisibleForTesting
     public void setDatabaseForTest(final DatabaseWrapper db) {
         Assert.isTrue(BugleApplication.isRunningTests());
         mDatabaseWrapper = db;
     }

     private DatabaseWrapper getDatabaseWrapper() {
         if (mDatabaseWrapper == null) {
             mDatabaseWrapper = mDatabaseHelper.getDatabase();
         }
         return mDatabaseWrapper;
     }

     @Override
     public Cursor query(final Uri uri, final String[] projection, String selection,
             final String[] selectionArgs, String sortOrder) {

         // Processes other than self are allowed to temporarily access the media
         // scratch space; we grant uri read access on a case-by-case basis. Dialer app and
         // contacts app would doQuery() on the vCard uri before trying to open the inputStream.
         // There's nothing that we need to return for this uri so just No-Op.
         //if (isMediaScratchSpaceUri(uri)) {
         //    return null;
         //}

         final SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();

         String[] queryArgs = selectionArgs;
         final int match = sURIMatcher.match(uri);
         String groupBy = null;
         String limit = null;
         switch (match) {
             case CONVERSATIONS_QUERY_CODE:
                 queryBuilder.setTables(ConversationListItemData.getConversationListView());
                 // Hide empty conversations (ones with 0 sort_timestamp)
                 queryBuilder.appendWhere(ConversationColumns.SORT_TIMESTAMP + " > 0 ");
                 break;
             case CONVERSATION_QUERY_CODE:
                 queryBuilder.setTables(ConversationListItemData.getConversationListView());
                 if (uri.getPathSegments().size() == 2) {
                     queryBuilder.appendWhere(ConversationColumns._ID + "=?");
                     // Get the conversation id from the uri
                     queryArgs = prependArgs(queryArgs, uri.getPathSegments().get(1));
                 } else {
                     throw new IllegalArgumentException("Malformed URI " + uri);
                 }
                 break;
             case CONVERSATION_PARTICIPANTS_QUERY_CODE:
                 queryBuilder.setTables(DatabaseHelper.PARTICIPANTS_TABLE);
                 if (uri.getPathSegments().size() == 3 &&
                         TextUtils.equals(uri.getPathSegments().get(1), "conversation")) {
                     queryBuilder.appendWhere(ParticipantColumns._ID + " IN ( " + "SELECT "
                             + ConversationParticipantsColumns.PARTICIPANT_ID + " AS "
                             + ParticipantColumns._ID
                             + " FROM " + DatabaseHelper.CONVERSATION_PARTICIPANTS_TABLE
                             + " WHERE " + ConversationParticipantsColumns.CONVERSATION_ID
                             + " =? UNION SELECT " + ParticipantColumns._ID + " FROM "
                             + DatabaseHelper.PARTICIPANTS_TABLE + " WHERE "
                             + ParticipantColumns.SUB_ID + " != "
                             + ParticipantData.OTHER_THAN_SELF_SUB_ID + " )");
                     // Get the conversation id from the uri
                     queryArgs = prependArgs(queryArgs, uri.getPathSegments().get(2));
                 } else {
                     throw new IllegalArgumentException("Malformed URI " + uri);
                 }
                 break;
             case PARTICIPANTS_QUERY_CODE:
                 queryBuilder.setTables(DatabaseHelper.PARTICIPANTS_TABLE);
                 if (uri.getPathSegments().size() != 1) {
                     throw new IllegalArgumentException("Malformed URI " + uri);
                 }
                 break;
             case CONVERSATION_MESSAGES_QUERY_CODE:
                 if (uri.getPathSegments().size() == 3 &&
                     TextUtils.equals(uri.getPathSegments().get(1), "conversation")) {
                     // Get the conversation id from the uri
                     final String conversationId = uri.getPathSegments().get(2);

                     // We need to handle this query differently, instead of falling through to the
                     // generic query call at the bottom. For performance reasons, the conversation
                     // messages query is executed as a raw query. It is invalid to specify
                     // selection/sorting for this query.

                     if (selection == null && selectionArgs == null && sortOrder == null) {
                         return queryConversationMessages(conversationId, uri);
                     } else {
                         throw new IllegalArgumentException(
                                 "Cannot set selection or sort order with this query");
                     }
                 } else {
                     throw new IllegalArgumentException("Malformed URI " + uri);
                 }
             case CONVERSATION_IMAGES_QUERY_CODE:
                 queryBuilder.setTables(ConversationImagePartsView.getViewName());
                 if (uri.getPathSegments().size() == 2) {
                     // Exclude draft.
                     queryBuilder.appendWhere(
                             ConversationImagePartsView.Columns.CONVERSATION_ID + " =? AND " +
                                     ConversationImagePartsView.Columns.STATUS + "<>" +
                                     MessageData.BUGLE_STATUS_OUTGOING_DRAFT);
                     // Get the conversation id from the uri
                     queryArgs = prependArgs(queryArgs, uri.getPathSegments().get(1));
                 } else {
                     throw new IllegalArgumentException("Malformed URI " + uri);
                 }
                 break;
             case DRAFT_IMAGES_QUERY_CODE:
                 queryBuilder.setTables(ConversationImagePartsView.getViewName());
                 if (uri.getPathSegments().size() == 2) {
                     // Draft only.
                     queryBuilder.appendWhere(
                             ConversationImagePartsView.Columns.CONVERSATION_ID + " =? AND " +
                                     ConversationImagePartsView.Columns.STATUS + "=" +
                                     MessageData.BUGLE_STATUS_OUTGOING_DRAFT);
                     // Get the conversation id from the uri
                     queryArgs = prependArgs(queryArgs, uri.getPathSegments().get(1));
                 } else {
                     throw new IllegalArgumentException("Malformed URI " + uri);
                 }
                 break;
             default: {
                 throw new IllegalArgumentException("Unknown URI " + uri);
             }
         }

         final Cursor cursor = getDatabaseWrapper().query(queryBuilder, projection, selection,
                 queryArgs, groupBy, null, sortOrder, limit);
         cursor.setNotificationUri(getContext().getContentResolver(), uri);
         return cursor;
     }

     private Cursor queryConversationMessages(final String conversationId, final Uri notifyUri) {
         final String[] queryArgs = { conversationId };
         final Cursor cursor = getDatabaseWrapper().rawQuery(
                 ConversationMessageData.getConversationMessagesQuerySql(), queryArgs);
         cursor.setNotificationUri(getContext().getContentResolver(), notifyUri);
         return cursor;
     }

     @Override
     public String getType(final Uri uri) {
         final StringBuilder sb = new
                 StringBuilder("vnd.android.cursor.dir/vnd.android.messaging.");

         switch (sURIMatcher.match(uri)) {
             case CONVERSATIONS_QUERY_CODE: {
                 sb.append(CONVERSATIONS_QUERY);
                 break;
             }
             default: {
                 throw new IllegalArgumentException("Unknown URI: " + uri);
             }
         }
         return sb.toString();
     }

     protected DatabaseHelper getDatabase() {
         return DatabaseHelper.getInstance(getContext());
     }

     @Override
     public ParcelFileDescriptor openFile(final Uri uri, final String fileMode)
             throws FileNotFoundException {
         throw new IllegalArgumentException("openFile not supported: " + uri);
     }

     @Override
     public Uri insert(final Uri uri, final ContentValues values) {
         throw new IllegalStateException("Insert not supported " + uri);
     }

     @Override
     public int delete(final Uri uri, final String selection, final String[] selectionArgs) {
         throw new IllegalArgumentException("Delete not supported: " + uri);
     }

     @Override
     public int update(final Uri uri, final ContentValues values, final String selection,
             final String[] selectionArgs) {
         throw new IllegalArgumentException("Update not supported: " + uri);
     }

     /**
      * Prepends new arguments to the existing argument list.
      *
      * @param oldArgList The current list of arguments. May be {@code null}
      * @param args The new arguments to prepend
      * @return A new argument list with the given arguments prepended
      */
     private String[] prependArgs(final String[] oldArgList, final String... args) {
         if (args == null || args.length == 0) {
             return oldArgList;
         }
         final int oldArgCount = (oldArgList == null ? 0 : oldArgList.length);
         final int newArgCount = args.length;

         final String[] newArgs = new String[oldArgCount + newArgCount];
         System.arraycopy(args, 0, newArgs, 0, newArgCount);
         if (oldArgCount > 0) {
             System.arraycopy(oldArgList, 0, newArgs, newArgCount, oldArgCount);
         }
         return newArgs;
     }
     /**
      * {@inheritDoc}
      */
     @Override
     public void dump(final FileDescriptor fd, final PrintWriter writer, final String[] args) {
         // First dump out the default SMS app package name
         String defaultSmsApp = PhoneUtils.getDefault().getDefaultSmsApp();
         if (TextUtils.isEmpty(defaultSmsApp)) {
             if (OsUtil.isAtLeastKLP()) {
                 defaultSmsApp = "None";
             } else {
                 defaultSmsApp = "None (pre-Kitkat)";
             }
         }
         writer.println("Default SMS app: " + defaultSmsApp);
         // Now dump logs
         LogUtil.dump(writer);
     }

     @Override
     public boolean onCreate() {
         // This is going to wind up calling into createDatabase() below.
         mDatabaseHelper = (DatabaseHelper) getDatabase();
         // We cannot initialize mDatabaseWrapper yet as the Factory may not be initialized
         return true;
     }
 }
	/*
	* Copyright (C) 2015 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.messaging.datamodel;

	import android.content.ContentProvider;
	import android.content.ContentResolver;
	import android.content.ContentValues;
	import android.content.Context;
	import android.content.UriMatcher;
	import android.database.Cursor;
	import android.database.sqlite.SQLiteQueryBuilder;
	import android.net.Uri;
	import android.os.ParcelFileDescriptor;
	import android.text.TextUtils;

	import com.android.messaging.BugleApplication;
	import com.android.messaging.Factory;
	import com.android.messaging.datamodel.DatabaseHelper.ConversationColumns;
	import com.android.messaging.datamodel.DatabaseHelper.ConversationParticipantsColumns;
	import com.android.messaging.datamodel.DatabaseHelper.ParticipantColumns;
	import com.android.messaging.datamodel.data.ConversationListItemData;
	import com.android.messaging.datamodel.data.ConversationMessageData;
	import com.android.messaging.datamodel.data.MessageData;
	import com.android.messaging.datamodel.data.ParticipantData;
	import com.android.messaging.util.Assert;
	import com.android.messaging.util.LogUtil;
	import com.android.messaging.util.OsUtil;
	import com.android.messaging.util.PhoneUtils;
	import com.android.messaging.widget.BugleWidgetProvider;
	import com.android.messaging.widget.WidgetConversationProvider;
	import com.google.common.annotations.VisibleForTesting;

	import java.io.FileDescriptor;
	import java.io.FileNotFoundException;
	import java.io.PrintWriter;

	/**
	* A centralized provider for Uris exposed by Bugle.
	* */
	public class MessagingContentProvider extends ContentProvider {
	private static final String TAG = LogUtil.BUGLE_TAG;

	@VisibleForTesting
	public static final String AUTHORITY =
	"com.android.messaging.datamodel.MessagingContentProvider";
	private static final String CONTENT_AUTHORITY = "content://" + AUTHORITY + '/';

	// Conversations query
	private static final String CONVERSATIONS_QUERY = "conversations";

	public static final Uri CONVERSATIONS_URI = Uri.parse(CONTENT_AUTHORITY + CONVERSATIONS_QUERY);
	static final Uri PARTS_URI = Uri.parse(CONTENT_AUTHORITY + DatabaseHelper.PARTS_TABLE);

	// Messages query
	private static final String MESSAGES_QUERY = "messages";

	static final Uri MESSAGES_URI = Uri.parse(CONTENT_AUTHORITY + MESSAGES_QUERY);

	public static final Uri CONVERSATION_MESSAGES_URI = Uri.parse(CONTENT_AUTHORITY +
	MESSAGES_QUERY + "/conversation");

	// Conversation participants query
	private static final String PARTICIPANTS_QUERY = "participants";

	static class ConversationParticipantsQueryColumns extends ParticipantColumns {
	static final String CONVERSATION_ID = ConversationParticipantsColumns.CONVERSATION_ID;
	}

	static final Uri CONVERSATION_PARTICIPANTS_URI = Uri.parse(CONTENT_AUTHORITY +
	PARTICIPANTS_QUERY + "/conversation");

	public static final Uri PARTICIPANTS_URI = Uri.parse(CONTENT_AUTHORITY + PARTICIPANTS_QUERY);

	// Conversation images query
	private static final String CONVERSATION_IMAGES_QUERY = "conversation_images";

	public static final Uri CONVERSATION_IMAGES_URI = Uri.parse(CONTENT_AUTHORITY +
	CONVERSATION_IMAGES_QUERY);

	private static final String DRAFT_IMAGES_QUERY = "draft_images";

	public static final Uri DRAFT_IMAGES_URI = Uri.parse(CONTENT_AUTHORITY +
	DRAFT_IMAGES_QUERY);

	/**
	* Notifies that <i>all</i> data exposed by the provider needs to be refreshed.
	* <p>
	* <b>IMPORTANT!</b> You probably shouldn't be calling this. Prefer to notify more specific
	* uri's instead. Currently only sync uses this, because sync can potentially update many
	* different tables at once.
	*/
	public static void notifyEverythingChanged() {
	final Uri uri = Uri.parse(CONTENT_AUTHORITY);
	final Context context = Factory.get().getApplicationContext();
	final ContentResolver cr = context.getContentResolver();
	cr.notifyChange(uri, null);

	// Notify any conversations widgets the conversation list has changed.
	BugleWidgetProvider.notifyConversationListChanged(context);

	// Notify all conversation widgets to update.
	WidgetConversationProvider.notifyMessagesChanged(context, null /conversationId/);
	}

	/**
	* Build a participant uri from the conversation id.
	*/
	public static Uri buildConversationParticipantsUri(final String conversationId) {
	final Uri.Builder builder = CONVERSATION_PARTICIPANTS_URI.buildUpon();
	builder.appendPath(conversationId);
	return builder.build();
	}

	public static void notifyParticipantsChanged(final String conversationId) {
	final Uri uri = buildConversationParticipantsUri(conversationId);
	final ContentResolver cr = Factory.get().getApplicationContext().getContentResolver();
	cr.notifyChange(uri, null);
	}

	public static void notifyAllMessagesChanged() {
	final ContentResolver cr = Factory.get().getApplicationContext().getContentResolver();
	cr.notifyChange(CONVERSATION_MESSAGES_URI, null);
	}

	public static void notifyAllParticipantsChanged() {
	final ContentResolver cr = Factory.get().getApplicationContext().getContentResolver();
	cr.notifyChange(CONVERSATION_PARTICIPANTS_URI, null);
	}

	// Default value for unknown dimension of image
	public static final int UNSPECIFIED_SIZE = -1;

	// Internal
	private static final int CONVERSATIONS_QUERY_CODE = 10;

	private static final int CONVERSATION_QUERY_CODE = 20;
	private static final int CONVERSATION_MESSAGES_QUERY_CODE = 30;
	private static final int CONVERSATION_PARTICIPANTS_QUERY_CODE = 40;
	private static final int CONVERSATION_IMAGES_QUERY_CODE = 50;
	private static final int DRAFT_IMAGES_QUERY_CODE = 60;
	private static final int PARTICIPANTS_QUERY_CODE = 70;

	// TODO: Move to a better structured URI namespace.
	private static final UriMatcher sURIMatcher = new UriMatcher(UriMatcher.NO_MATCH);
	static {
	sURIMatcher.addURI(AUTHORITY, CONVERSATIONS_QUERY, CONVERSATIONS_QUERY_CODE);
	sURIMatcher.addURI(AUTHORITY, CONVERSATIONS_QUERY + "/*", CONVERSATION_QUERY_CODE);
	sURIMatcher.addURI(AUTHORITY, MESSAGES_QUERY + "/conversation/*",
	CONVERSATION_MESSAGES_QUERY_CODE);
	sURIMatcher.addURI(AUTHORITY, PARTICIPANTS_QUERY + "/conversation/*",
	CONVERSATION_PARTICIPANTS_QUERY_CODE);
	sURIMatcher.addURI(AUTHORITY, PARTICIPANTS_QUERY, PARTICIPANTS_QUERY_CODE);
	sURIMatcher.addURI(AUTHORITY, CONVERSATION_IMAGES_QUERY + "/*",
	CONVERSATION_IMAGES_QUERY_CODE);
	sURIMatcher.addURI(AUTHORITY, DRAFT_IMAGES_QUERY + "/*",
	DRAFT_IMAGES_QUERY_CODE);
	}

	/**
	* Build a messages uri from the conversation id.
	*/
	public static Uri buildConversationMessagesUri(final String conversationId) {
	final Uri.Builder builder = CONVERSATION_MESSAGES_URI.buildUpon();
	builder.appendPath(conversationId);
	return builder.build();
	}

	public static void notifyMessagesChanged(final String conversationId) {
	final Uri uri = buildConversationMessagesUri(conversationId);
	final Context context = Factory.get().getApplicationContext();
	final ContentResolver cr = context.getContentResolver();
	cr.notifyChange(uri, null);
	notifyConversationListChanged();

	// Notify the widget the messages changed
	WidgetConversationProvider.notifyMessagesChanged(context, conversationId);
	}

	/**
	* Build a conversation metadata uri from a conversation id.
	*/
	public static Uri buildConversationMetadataUri(final String conversationId) {
	final Uri.Builder builder = CONVERSATIONS_URI.buildUpon();
	builder.appendPath(conversationId);
	return builder.build();
	}

	public static void notifyConversationMetadataChanged(final String conversationId) {
	final Uri uri = buildConversationMetadataUri(conversationId);
	final ContentResolver cr = Factory.get().getApplicationContext().getContentResolver();
	cr.notifyChange(uri, null);
	notifyConversationListChanged();
	}

	public static void notifyPartsChanged() {
	final ContentResolver cr = Factory.get().getApplicationContext().getContentResolver();
	cr.notifyChange(PARTS_URI, null);
	}

	public static void notifyConversationListChanged() {
	final Context context = Factory.get().getApplicationContext();
	final ContentResolver cr = context.getContentResolver();
	cr.notifyChange(CONVERSATIONS_URI, null);

	// Notify the widget the conversation list changed
	BugleWidgetProvider.notifyConversationListChanged(context);
	}

	/**
	* Build a conversation images uri from a conversation id.
	*/
	public static Uri buildConversationImagesUri(final String conversationId) {
	final Uri.Builder builder = CONVERSATION_IMAGES_URI.buildUpon();
	builder.appendPath(conversationId);
	return builder.build();
	}

	/**
	* Build a draft images uri from a conversation id.
	*/
	public static Uri buildDraftImagesUri(final String conversationId) {
	final Uri.Builder builder = DRAFT_IMAGES_URI.buildUpon();
	builder.appendPath(conversationId);
	return builder.build();
	}

	private DatabaseHelper mDatabaseHelper;
	private DatabaseWrapper mDatabaseWrapper;

	public MessagingContentProvider() {
	super();
	}

	@VisibleForTesting
	public void setDatabaseForTest(final DatabaseWrapper db) {
	Assert.isTrue(BugleApplication.isRunningTests());
	mDatabaseWrapper = db;
	}

	private DatabaseWrapper getDatabaseWrapper() {
	if (mDatabaseWrapper == null) {
	mDatabaseWrapper = mDatabaseHelper.getDatabase();
	}
	return mDatabaseWrapper;
	}

	@Override
	public Cursor query(final Uri uri, final String[] projection, String selection,
	final String[] selectionArgs, String sortOrder) {

	// Processes other than self are allowed to temporarily access the media
	// scratch space; we grant uri read access on a case-by-case basis. Dialer app and
	// contacts app would doQuery() on the vCard uri before trying to open the inputStream.
	// There's nothing that we need to return for this uri so just No-Op.
	//if (isMediaScratchSpaceUri(uri)) {
	// return null;
	//}

	final SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();

	String[] queryArgs = selectionArgs;
	final int match = sURIMatcher.match(uri);
	String groupBy = null;
	String limit = null;
	switch (match) {
	case CONVERSATIONS_QUERY_CODE:
	queryBuilder.setTables(ConversationListItemData.getConversationListView());
	// Hide empty conversations (ones with 0 sort_timestamp)
	queryBuilder.appendWhere(ConversationColumns.SORT_TIMESTAMP + " > 0 ");
	break;
	case CONVERSATION_QUERY_CODE:
	queryBuilder.setTables(ConversationListItemData.getConversationListView());
	if (uri.getPathSegments().size() == 2) {
	queryBuilder.appendWhere(ConversationColumns._ID + "=?");
	// Get the conversation id from the uri
	queryArgs = prependArgs(queryArgs, uri.getPathSegments().get(1));
	} else {
	throw new IllegalArgumentException("Malformed URI " + uri);
	}
	break;
	case CONVERSATION_PARTICIPANTS_QUERY_CODE:
	queryBuilder.setTables(DatabaseHelper.PARTICIPANTS_TABLE);
	if (uri.getPathSegments().size() == 3 &&
	TextUtils.equals(uri.getPathSegments().get(1), "conversation")) {
	queryBuilder.appendWhere(ParticipantColumns._ID + " IN ( " + "SELECT "
	+ ConversationParticipantsColumns.PARTICIPANT_ID + " AS "
	+ ParticipantColumns._ID
	+ " FROM " + DatabaseHelper.CONVERSATION_PARTICIPANTS_TABLE
	+ " WHERE " + ConversationParticipantsColumns.CONVERSATION_ID
	+ " =? UNION SELECT " + ParticipantColumns._ID + " FROM "
	+ DatabaseHelper.PARTICIPANTS_TABLE + " WHERE "
	+ ParticipantColumns.SUB_ID + " != "
	+ ParticipantData.OTHER_THAN_SELF_SUB_ID + " )");
	// Get the conversation id from the uri
	queryArgs = prependArgs(queryArgs, uri.getPathSegments().get(2));
	} else {
	throw new IllegalArgumentException("Malformed URI " + uri);
	}
	break;
	case PARTICIPANTS_QUERY_CODE:
	queryBuilder.setTables(DatabaseHelper.PARTICIPANTS_TABLE);
	if (uri.getPathSegments().size() != 1) {
	throw new IllegalArgumentException("Malformed URI " + uri);
	}
	break;
	case CONVERSATION_MESSAGES_QUERY_CODE:
	if (uri.getPathSegments().size() == 3 &&
	TextUtils.equals(uri.getPathSegments().get(1), "conversation")) {
	// Get the conversation id from the uri
	final String conversationId = uri.getPathSegments().get(2);

	// We need to handle this query differently, instead of falling through to the
	// generic query call at the bottom. For performance reasons, the conversation
	// messages query is executed as a raw query. It is invalid to specify
	// selection/sorting for this query.

	if (selection == null && selectionArgs == null && sortOrder == null) {
	return queryConversationMessages(conversationId, uri);
	} else {
	throw new IllegalArgumentException(
	"Cannot set selection or sort order with this query");
	}
	} else {
	throw new IllegalArgumentException("Malformed URI " + uri);
	}
	case CONVERSATION_IMAGES_QUERY_CODE:
	queryBuilder.setTables(ConversationImagePartsView.getViewName());
	if (uri.getPathSegments().size() == 2) {
	// Exclude draft.
	queryBuilder.appendWhere(
	ConversationImagePartsView.Columns.CONVERSATION_ID + " =? AND " +
	ConversationImagePartsView.Columns.STATUS + "<>" +
	MessageData.BUGLE_STATUS_OUTGOING_DRAFT);
	// Get the conversation id from the uri
	queryArgs = prependArgs(queryArgs, uri.getPathSegments().get(1));
	} else {
	throw new IllegalArgumentException("Malformed URI " + uri);
	}
	break;
	case DRAFT_IMAGES_QUERY_CODE:
	queryBuilder.setTables(ConversationImagePartsView.getViewName());
	if (uri.getPathSegments().size() == 2) {
	// Draft only.
	queryBuilder.appendWhere(
	ConversationImagePartsView.Columns.CONVERSATION_ID + " =? AND " +
	ConversationImagePartsView.Columns.STATUS + "=" +
	MessageData.BUGLE_STATUS_OUTGOING_DRAFT);
	// Get the conversation id from the uri
	queryArgs = prependArgs(queryArgs, uri.getPathSegments().get(1));
	} else {
	throw new IllegalArgumentException("Malformed URI " + uri);
	}
	break;
	default: {
	throw new IllegalArgumentException("Unknown URI " + uri);
	}
	}

	final Cursor cursor = getDatabaseWrapper().query(queryBuilder, projection, selection,
	queryArgs, groupBy, null, sortOrder, limit);
	cursor.setNotificationUri(getContext().getContentResolver(), uri);
	return cursor;
	}

	private Cursor queryConversationMessages(final String conversationId, final Uri notifyUri) {
	final String[] queryArgs = { conversationId };
	final Cursor cursor = getDatabaseWrapper().rawQuery(
	ConversationMessageData.getConversationMessagesQuerySql(), queryArgs);
	cursor.setNotificationUri(getContext().getContentResolver(), notifyUri);
	return cursor;
	}

	@Override
	public String getType(final Uri uri) {
	final StringBuilder sb = new
	StringBuilder("vnd.android.cursor.dir/vnd.android.messaging.");

	switch (sURIMatcher.match(uri)) {
	case CONVERSATIONS_QUERY_CODE: {
	sb.append(CONVERSATIONS_QUERY);
	break;
	}
	default: {
	throw new IllegalArgumentException("Unknown URI: " + uri);
	}
	}
	return sb.toString();
	}

	protected DatabaseHelper getDatabase() {
	return DatabaseHelper.getInstance(getContext());
	}

	@Override
	public ParcelFileDescriptor openFile(final Uri uri, final String fileMode)
	throws FileNotFoundException {
	throw new IllegalArgumentException("openFile not supported: " + uri);
	}

	@Override
	public Uri insert(final Uri uri, final ContentValues values) {
	throw new IllegalStateException("Insert not supported " + uri);
	}

	@Override
	public int delete(final Uri uri, final String selection, final String[] selectionArgs) {
	throw new IllegalArgumentException("Delete not supported: " + uri);
	}

	@Override
	public int update(final Uri uri, final ContentValues values, final String selection,
	final String[] selectionArgs) {
	throw new IllegalArgumentException("Update not supported: " + uri);
	}

	/**
	* Prepends new arguments to the existing argument list.
	*
	* @param oldArgList The current list of arguments. May be {@code null}
	* @param args The new arguments to prepend
	* @return A new argument list with the given arguments prepended
	*/
	private String[] prependArgs(final String[] oldArgList, final String... args) {
	if (args == null \|\| args.length == 0) {
	return oldArgList;
	}
	final int oldArgCount = (oldArgList == null ? 0 : oldArgList.length);
	final int newArgCount = args.length;

	final String[] newArgs = new String[oldArgCount + newArgCount];
	System.arraycopy(args, 0, newArgs, 0, newArgCount);
	if (oldArgCount > 0) {
	System.arraycopy(oldArgList, 0, newArgs, newArgCount, oldArgCount);
	}
	return newArgs;
	}
	/**
	* {@inheritDoc}
	*/
	@Override
	public void dump(final FileDescriptor fd, final PrintWriter writer, final String[] args) {
	// First dump out the default SMS app package name
	String defaultSmsApp = PhoneUtils.getDefault().getDefaultSmsApp();
	if (TextUtils.isEmpty(defaultSmsApp)) {
	if (OsUtil.isAtLeastKLP()) {
	defaultSmsApp = "None";
	} else {
	defaultSmsApp = "None (pre-Kitkat)";
	}
	}
	writer.println("Default SMS app: " + defaultSmsApp);
	// Now dump logs
	LogUtil.dump(writer);
	}

	@Override
	public boolean onCreate() {
	// This is going to wind up calling into createDatabase() below.
	mDatabaseHelper = (DatabaseHelper) getDatabase();
	// We cannot initialize mDatabaseWrapper yet as the Factory may not be initialized
	return true;
	}
	}