Revert metadata_sync table and related code from M

Bug:20553119
Change-Id: I89b48cc5a39a57ebeafe7821f07c410dac871258

3 files changed, 11 insertions, 581 deletions

diff --git a/src/com/android/providers/contacts/ContactsDatabaseHelper.java b/src/com/android/providers/contacts/ContactsDatabaseHelper.java
index bbde779..6dc6049 100644
--- a/src/com/android/providers/contacts/ContactsDatabaseHelper.java
+++ b/src/com/android/providers/contacts/ContactsDatabaseHelper.java
@@ -63,7 +63,6 @@ import android.provider.ContactsContract.DisplayNameSources;
 import android.provider.ContactsContract.DisplayPhoto;
 import android.provider.ContactsContract.FullNameStyle;
 import android.provider.ContactsContract.Groups;
-import android.provider.ContactsContract.MetadataSync;
 import android.provider.ContactsContract.PhoneticNameStyle;
 import android.provider.ContactsContract.PhotoFiles;
 import android.provider.ContactsContract.PinnedPositions;
@@ -122,7 +121,7 @@ public class ContactsDatabaseHelper extends SQLiteOpenHelper {
      *   1000-1099 M
      * </pre>
      */
-    static final int DATABASE_VERSION = 1009;
+    static final int DATABASE_VERSION = 1010;
 
     public interface Tables {
         public static final String CONTACTS = "contacts";
@@ -151,7 +150,6 @@ public class ContactsDatabaseHelper extends SQLiteOpenHelper {
         public static final String DEFAULT_DIRECTORY = "default_directory";
         public static final String SEARCH_INDEX = "search_index";
         public static final String VOICEMAIL_STATUS = "voicemail_status";
-        public static final String METADATA_SYNC = "metadata_sync";
         public static final String PRE_AUTHORIZED_URIS = "pre_authorized_uris";
 
         // This list of tables contains auto-incremented sequences.
@@ -306,7 +304,6 @@ public class ContactsDatabaseHelper extends SQLiteOpenHelper {
         public static final String GROUPS = "view_groups";
         public static final String DATA_USAGE_STAT = "view_data_usage_stat";
         public static final String STREAM_ITEMS = "view_stream_items";
-        public static final String METADATA_SYNC = "view_metadata_sync";
     }
 
     public interface Projections {
@@ -732,12 +729,6 @@ public class ContactsDatabaseHelper extends SQLiteOpenHelper {
         public static final int USAGE_TYPE_INT_SHORT_TEXT = 2;
     }
 
-    public interface MetadataSyncColumns {
-        static final String CONCRETE_ID = Tables.METADATA_SYNC + "._id";
-        static final String ACCOUNT_ID = "account_id";
-        static final String CONCRETE_ACCOUNT_ID = Tables.METADATA_SYNC + "." + ACCOUNT_ID;
-    }
-
     private  interface EmailQuery {
         public static final String TABLE = Tables.DATA;
 
@@ -1590,19 +1581,6 @@ public class ContactsDatabaseHelper extends SQLiteOpenHelper {
                 DataUsageStatColumns.USAGE_TYPE_INT +
         ");");
 
-        db.execSQL("CREATE TABLE IF NOT EXISTS "
-                + Tables.METADATA_SYNC + " (" +
-                MetadataSync._ID + " INTEGER PRIMARY KEY AUTOINCREMENT," +
-                MetadataSync.RAW_CONTACT_BACKUP_ID + " TEXT NOT NULL," +
-                MetadataSyncColumns.ACCOUNT_ID + " INTEGER NOT NULL," +
-                MetadataSync.DATA + " TEXT," +
-                MetadataSync.DELETED + " INTEGER NOT NULL DEFAULT 0);");
-
-        db.execSQL("CREATE UNIQUE INDEX IF NOT EXISTS metadata_sync_index ON " +
-                Tables.METADATA_SYNC + " (" +
-                MetadataSync.RAW_CONTACT_BACKUP_ID + ", " +
-                MetadataSyncColumns.ACCOUNT_ID +");");
-
         db.execSQL("CREATE TABLE " + Tables.PRE_AUTHORIZED_URIS + " ("+
                 PreAuthorizedUris._ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
                 PreAuthorizedUris.URI + " STRING NOT NULL, " +
@@ -1846,7 +1824,6 @@ public class ContactsDatabaseHelper extends SQLiteOpenHelper {
         db.execSQL("DROP VIEW IF EXISTS " + Views.ENTITIES + ";");
         db.execSQL("DROP VIEW IF EXISTS " + Views.DATA_USAGE_STAT + ";");
         db.execSQL("DROP VIEW IF EXISTS " + Views.STREAM_ITEMS + ";");
-        db.execSQL("DROP VIEW IF EXISTS " + Views.METADATA_SYNC + ";");
 
         String dataColumns =
                 Data.IS_PRIMARY + ", "
@@ -2173,21 +2150,6 @@ public class ContactsDatabaseHelper extends SQLiteOpenHelper {
                 + RawContactsColumns.CONCRETE_CONTACT_ID + "=" + ContactsColumns.CONCRETE_ID + ")";
 
         db.execSQL("CREATE VIEW " + Views.STREAM_ITEMS + " AS " + streamItemSelect);
-
-        String metadataSyncSelect = "SELECT " +
-                MetadataSyncColumns.CONCRETE_ID + ", " +
-                MetadataSync.RAW_CONTACT_BACKUP_ID + ", " +
-                AccountsColumns.ACCOUNT_NAME + ", " +
-                AccountsColumns.ACCOUNT_TYPE + ", " +
-                AccountsColumns.DATA_SET + ", " +
-                MetadataSync.DATA + ", " +
-                MetadataSync.DELETED +
-                " FROM " + Tables.METADATA_SYNC
-                + " JOIN " + Tables.ACCOUNTS + " ON ("
-                +   MetadataSyncColumns.CONCRETE_ACCOUNT_ID + "=" + AccountsColumns.CONCRETE_ID
-                + ")";
-
-        db.execSQL("CREATE VIEW " + Views.METADATA_SYNC + " AS " + metadataSyncSelect);
     }
 
     private static String buildDisplayPhotoUriAlias(String contactIdColumn, String alias) {
@@ -2889,11 +2851,6 @@ public class ContactsDatabaseHelper extends SQLiteOpenHelper {
             upgradeViewsAndTriggers = true;
             oldVersion = 1000;
         }
-        if (oldVersion < 1001) {
-            upgradeToVersion1001(db);
-            rebuildSqliteStats = true;
-            oldVersion = 1001;
-        }
 
         if (oldVersion < 1002) {
             rebuildSqliteStats = true;
@@ -2926,17 +2883,17 @@ public class ContactsDatabaseHelper extends SQLiteOpenHelper {
             oldVersion = 1007;
         }
 
-        if (oldVersion < 1008) {
-            upgradeToVersion1008(db);
-            upgradeViewsAndTriggers = true;
-            oldVersion = 1008;
-        }
-
         if (oldVersion < 1009) {
             upgradeToVersion1009(db);
             oldVersion = 1009;
         }
 
+        if (oldVersion < 1010) {
+            upgradeToVersion1010(db);
+            rebuildSqliteStats = true;
+            oldVersion = 1010;
+        }
+
         if (upgradeViewsAndTriggers) {
             createContactsViews(db);
             createGroupsView(db);
@@ -4375,21 +4332,6 @@ public class ContactsDatabaseHelper extends SQLiteOpenHelper {
         db.execSQL("CREATE INDEX IF NOT EXISTS data_hash_id_index ON data (hash_id);");
     }
 
-    /**
-     * Add new metadata_sync table to cache the meta data on raw contacts level from server before
-     * they are merged into other CP2 tables. The data column is the blob column containing all
-     * the backed up metadata for this raw_contact. This table should only be used by metadata
-     * sync adapter.
-     */
-    private void upgradeToVersion1001(SQLiteDatabase db) {
-        db.execSQL("CREATE TABLE metadata_sync (" +
-                "_id INTEGER PRIMARY KEY AUTOINCREMENT, raw_contact_backup_id TEXT NOT NULL, " +
-                "account_id INTEGER NOT NULL, data TEXT, " +
-                "FOREIGN KEY(account_id) REFERENCES accounts(_id));");
-        db.execSQL("CREATE UNIQUE INDEX metadata_sync_index ON metadata_sync (" +
-                "raw_contact_backup_id, account_id);");
-    }
-
     @VisibleForTesting
     public void upgradeToVersion1002(SQLiteDatabase db) {
         db.execSQL("DROP TABLE IF EXISTS pre_authorized_uris;");
@@ -4461,28 +4403,16 @@ public class ContactsDatabaseHelper extends SQLiteOpenHelper {
             // Log verbose because this should be the majority case.
             Log.v(TAG, "Version 1007: Columns already exist, skipping upgrade steps.");
         }
-  }
-
-    /**
-     * The metadata_sync APIs were not in-use by anyone in the time
-     * between their initial creation (in v1001) and this update.  So we're just dropping
-     * and re-creating it to get appropriate columns. The delta is as follows:
-     * - drop foreign key constraint on account_id
-     * - add deleted column
-     */
-    public void upgradeToVersion1008(SQLiteDatabase db) {
-        db.execSQL("DROP TABLE IF EXISTS metadata_sync");
-        db.execSQL("CREATE TABLE metadata_sync (" +
-                "_id INTEGER PRIMARY KEY AUTOINCREMENT, raw_contact_backup_id TEXT NOT NULL, " +
-                "account_id INTEGER NOT NULL, data TEXT, deleted INTEGER NOT NULL DEFAULT 0);");
-        db.execSQL("CREATE UNIQUE INDEX metadata_sync_index ON metadata_sync (" +
-                "raw_contact_backup_id, account_id);");
     }
 
     public void upgradeToVersion1009(SQLiteDatabase db) {
         db.execSQL("ALTER TABLE data ADD carrier_presence INTEGER NOT NULL DEFAULT 0");
     }
 
+    public void upgradeToVersion1010(SQLiteDatabase db) {
+        db.execSQL("DROP TABLE IF EXISTS metadata_sync");
+    }
+
     public String extractHandleFromEmailAddress(String email) {
         Rfc822Token[] tokens = Rfc822Tokenizer.tokenize(email);
         if (tokens.length == 0) {
@@ -4671,9 +4601,6 @@ public class ContactsDatabaseHelper extends SQLiteOpenHelper {
             updateIndexStats(db, Tables.DATA_USAGE_STAT,
                     "data_usage_stat_index", "20 2 1");
 
-            updateIndexStats(db, Tables.METADATA_SYNC,
-                    "metadata_sync_index", "10000 1 1");
-
             // Tiny tables
             updateIndexStats(db, Tables.AGGREGATION_EXCEPTIONS,
                     null, "10");
diff --git a/src/com/android/providers/contacts/ContactsProvider2.java b/src/com/android/providers/contacts/ContactsProvider2.java
index 71f20f5..6031b6b 100644
--- a/src/com/android/providers/contacts/ContactsProvider2.java
+++ b/src/com/android/providers/contacts/ContactsProvider2.java
@@ -153,11 +153,6 @@ import com.android.providers.contacts.aggregation.util.CommonNicknameCache;
 import com.android.providers.contacts.database.ContactsTableUtil;
 import com.android.providers.contacts.database.DeletedContactsTableUtil;
 import com.android.providers.contacts.database.MoreDatabaseUtils;
-import com.android.providers.contacts.MetadataEntryParser.AggregationData;
-import com.android.providers.contacts.MetadataEntryParser.FieldData;
-import com.android.providers.contacts.MetadataEntryParser.MetadataEntry;
-import com.android.providers.contacts.MetadataEntryParser.RawContactInfo;
-import com.android.providers.contacts.MetadataEntryParser.UsageStats;
 import com.android.providers.contacts.util.Clock;
 import com.android.providers.contacts.util.ContactsPermissions;
 import com.android.providers.contacts.util.DbQueryUtils;
@@ -4704,162 +4699,6 @@ public class ContactsProvider2 extends AbstractContactsProvider
         scheduleBackgroundTask(BACKGROUND_TASK_UPDATE_ACCOUNTS);
     }
 
-    interface RawContactsBackupQuery {
-        String TABLE = Tables.RAW_CONTACTS;
-        String[] COLUMNS = new String[] {
-                RawContacts._ID,
-        };
-        int RAW_CONTACT_ID = 0;
-        String SELECTION = RawContacts.DELETED + "=0 AND " +
-                RawContacts.BACKUP_ID + "=? AND " +
-                RawContactsColumns.ACCOUNT_ID + "=?";
-    }
-
-    /**
-     * Fetch rawContactId related to the given backupId.
-     * Return 0 if there's no such rawContact or it's deleted.
-     */
-    private long queryRawContactId(SQLiteDatabase db, String backupId, long accountId) {
-        if (TextUtils.isEmpty(backupId)) {
-            return 0;
-        }
-        mSelectionArgs2[0] = backupId;
-        mSelectionArgs2[1] = String.valueOf(accountId);
-        long rawContactId = 0;
-        final Cursor cursor = db.query(RawContactsBackupQuery.TABLE,
-                RawContactsBackupQuery.COLUMNS, RawContactsBackupQuery.SELECTION,
-                mSelectionArgs2, null, null, null);
-        try {
-            if (cursor.moveToFirst()) {
-                rawContactId = cursor.getLong(RawContactsBackupQuery.RAW_CONTACT_ID);
-            }
-        } finally {
-            cursor.close();
-        }
-        return rawContactId;
-    }
-
-    interface DataHashQuery {
-        String TABLE = Tables.DATA;
-        String[] COLUMNS = new String[] {
-                Data._ID,
-        };
-        int DATA_ID = 0;
-        String SELECTION = Data.HASH_ID + "=?";
-    }
-
-    /**
-     * Fetch a list of dataId related to the given hashId.
-     * Return empty list if there's no such data.
-     */
-    private ArrayList<Long> queryDataId(SQLiteDatabase db, String hashId) {
-        if (TextUtils.isEmpty(hashId)) {
-            return new ArrayList<>();
-        }
-        mSelectionArgs1[0] = hashId;
-        ArrayList<Long> result = new ArrayList<>();
-        long dataId = 0;
-        final Cursor c = db.query(DataHashQuery.TABLE, DataHashQuery.COLUMNS,
-                DataHashQuery.SELECTION, mSelectionArgs1, null, null, null);
-        try {
-            while (c.moveToNext()) {
-                dataId = c.getLong(DataHashQuery.DATA_ID);
-                result.add(dataId);
-            }
-        } finally {
-            c.close();
-        }
-        return result;
-    }
-
-    private long searchRawContactIdForRawContactInfo(SQLiteDatabase db,
-            RawContactInfo rawContactInfo) {
-        if (rawContactInfo == null) {
-            return 0;
-        }
-        final String backupId = rawContactInfo.mBackupId;
-        final String accountType = rawContactInfo.mAccountType;
-        final String accountName = rawContactInfo.mAccountName;
-        final String dataSet = rawContactInfo.mDataSet;
-        ContentValues values = new ContentValues();
-        values.put(AccountsColumns.ACCOUNT_TYPE, accountType);
-        values.put(AccountsColumns.ACCOUNT_NAME, accountName);
-        if (dataSet != null) {
-            values.put(AccountsColumns.DATA_SET, dataSet);
-        }
-
-        final long accountId = replaceAccountInfoByAccountId(RawContacts.CONTENT_URI, values);
-        final long rawContactId = queryRawContactId(db, backupId, accountId);
-        return rawContactId;
-    }
-
-    /**
-     * Update RawContact, Data, DataUsageStats, AggregationException tables from MetadataEntry.
-     */
-    @NeededForTesting
-    void updateFromMetaDataEntry(SQLiteDatabase db, MetadataEntry metadataEntry) {
-        final RawContactInfo rawContactInfo =  metadataEntry.mRawContactInfo;
-        final long rawContactId = searchRawContactIdForRawContactInfo(db, rawContactInfo);
-        if (rawContactId == 0) {
-            return;
-        }
-
-        ContentValues rawContactValues = new ContentValues();
-        rawContactValues.put(RawContacts.SEND_TO_VOICEMAIL, metadataEntry.mSendToVoicemail);
-        rawContactValues.put(RawContacts.STARRED, metadataEntry.mStarred);
-        rawContactValues.put(RawContacts.PINNED, metadataEntry.mPinned);
-        updateRawContact(db, rawContactId, rawContactValues, true);
-
-        // Update Data and DataUsageStats table.
-        for (int i = 0; i < metadataEntry.mFieldDatas.size(); i++) {
-            final FieldData fieldData = metadataEntry.mFieldDatas.get(i);
-            final String dataHashId = fieldData.mDataHashId;
-            final ArrayList<Long> dataIds = queryDataId(db, dataHashId);
-
-            for (long dataId : dataIds) {
-                // Update is_primary and is_super_primary.
-                ContentValues dataValues = new ContentValues();
-                dataValues.put(Data.IS_PRIMARY, fieldData.mIsPrimary);
-                dataValues.put(Data.IS_SUPER_PRIMARY, fieldData.mIsSuperPrimary);
-                updateData(ContentUris.withAppendedId(Data.CONTENT_URI, dataId),
-                        dataValues, null, null, true);
-
-                // Update UsageStats.
-                for (int j = 0; j < fieldData.mUsageStatsList.size(); j++) {
-                    final UsageStats usageStats = fieldData.mUsageStatsList.get(j);
-                    final String usageType = usageStats.mUsageType;
-                    final int typeInt = getDataUsageFeedbackType(usageType.toLowerCase(), null);
-                    final long lastTimeUsed = usageStats.mLastTimeUsed;
-                    final int timesUsed = usageStats.mTimesUsed;
-                    ContentValues usageStatsValues = new ContentValues();
-                    usageStatsValues.put(DataUsageStatColumns.DATA_ID, dataId);
-                    usageStatsValues.put(DataUsageStatColumns.USAGE_TYPE_INT, typeInt);
-                    usageStatsValues.put(DataUsageStatColumns.LAST_TIME_USED, lastTimeUsed);
-                    usageStatsValues.put(DataUsageStatColumns.TIMES_USED, timesUsed);
-                    updateDataUsageStats(db, usageStatsValues);
-                }
-            }
-        }
-
-        // Update AggregationException table.
-        for (int i = 0; i < metadataEntry.mAggregationDatas.size(); i++) {
-            final AggregationData aggregationData = metadataEntry.mAggregationDatas.get(i);
-            final int typeInt = getAggregationType(aggregationData.mType, null);
-            final RawContactInfo aggregationContact1 = aggregationData.mRawContactInfo1;
-            final RawContactInfo aggregationContact2 = aggregationData.mRawContactInfo2;
-            final long rawContactId1 = searchRawContactIdForRawContactInfo(db, aggregationContact1);
-            final long rawContactId2 = searchRawContactIdForRawContactInfo(db, aggregationContact2);
-            if (rawContactId1 == 0 || rawContactId2 == 0) {
-                continue;
-            }
-            ContentValues values = new ContentValues();
-            values.put(AggregationExceptions.RAW_CONTACT_ID1, rawContactId1);
-            values.put(AggregationExceptions.RAW_CONTACT_ID2, rawContactId2);
-            values.put(AggregationExceptions.TYPE, typeInt);
-            updateAggregationException(db, values);
-        }
-    }
-
     /** return serialized version of {@code accounts} */
     @VisibleForTesting
     static String accountsToString(Set<Account> accounts) {
@@ -9260,52 +9099,6 @@ public class ContactsProvider2 extends AbstractContactsProvider
     }
 
     /**
-     * Update {@link Tables#DATA_USAGE_STAT}.
-     * Update or insert usageType, lastTimeUsed, and timesUsed for specific dataId.
-     */
-    private void updateDataUsageStats(SQLiteDatabase db, ContentValues values) {
-        final String dataId = values.getAsString(DataUsageStatColumns.DATA_ID);
-        final String type = values.getAsString(DataUsageStatColumns.USAGE_TYPE_INT);
-        final String lastTimeUsed = values.getAsString(DataUsageStatColumns.LAST_TIME_USED);
-        final String timesUsed = values.getAsString(DataUsageStatColumns.TIMES_USED);
-
-        mSelectionArgs2[0] = dataId;
-        mSelectionArgs2[1] = type;
-        final Cursor cursor = db.query(DataUsageStatQuery.TABLE,
-                DataUsageStatQuery.COLUMNS, DataUsageStatQuery.SELECTION,
-                mSelectionArgs2, null, null, null);
-
-        try {
-            if (cursor.moveToFirst()) {
-                final long id = cursor.getLong(DataUsageStatQuery.ID);
-
-                mSelectionArgs3[0] = lastTimeUsed;
-                mSelectionArgs3[1] = timesUsed;
-                mSelectionArgs3[2] = String.valueOf(id);
-                db.execSQL("UPDATE " + Tables.DATA_USAGE_STAT +
-                        " SET " + DataUsageStatColumns.LAST_TIME_USED + "=?" +
-                        "," + DataUsageStatColumns.TIMES_USED + "=?" +
-                        " WHERE " + DataUsageStatColumns._ID + "=?",
-                        mSelectionArgs3);
-            } else {
-                mSelectionArgs4[0] = dataId;
-                mSelectionArgs4[1] = type;
-                mSelectionArgs4[2] = timesUsed;
-                mSelectionArgs4[3] = lastTimeUsed;
-                db.execSQL("INSERT INTO " + Tables.DATA_USAGE_STAT +
-                        "(" + DataUsageStatColumns.DATA_ID +
-                        "," + DataUsageStatColumns.USAGE_TYPE_INT +
-                        "," + DataUsageStatColumns.TIMES_USED +
-                        "," + DataUsageStatColumns.LAST_TIME_USED +
-                        ") VALUES (?,?,?,?)",
-                        mSelectionArgs4);
-            }
-        } finally {
-            cursor.close();
-        }
-    }
-
-    /**
      * Returns a sort order String for promoting data rows (email addresses, phone numbers, etc.)
      * associated with a primary account. The primary account should be supplied from applications
      * with {@link ContactsContract#PRIMARY_ACCOUNT_NAME} and
@@ -9479,22 +9272,6 @@ public class ContactsProvider2 extends AbstractContactsProvider
         throw new IllegalArgumentException("Invalid usage type " + type);
     }
 
-    private static final int getAggregationType(String type, Integer defaultType) {
-        if ("TOGETHER".equalsIgnoreCase(type)) {
-            return AggregationExceptions.TYPE_KEEP_TOGETHER; // 1
-        }
-        if ("SEPARATE".equalsIgnoreCase(type)) {
-            return AggregationExceptions.TYPE_KEEP_SEPARATE; // 2
-        }
-        if ("UNSET".equalsIgnoreCase(type)) {
-            return AggregationExceptions.TYPE_AUTOMATIC; // 0
-        }
-        if (defaultType != null) {
-            return defaultType;
-        }
-        throw new IllegalArgumentException("Invalid aggregation type " + type);
-    }
-
     /** Use only for debug logging */
     @Override
     public String toString() {
diff --git a/src/com/android/providers/contacts/MetadataEntryParser.java b/src/com/android/providers/contacts/MetadataEntryParser.java
deleted file mode 100644
index b90f938..0000000
--- a/src/com/android/providers/contacts/MetadataEntryParser.java
+++ /dev/null
@@ -1,274 +0,0 @@
-/*
- * 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.providers.contacts;
-
-import android.text.TextUtils;
-import com.android.providers.contacts.util.NeededForTesting;
-
-import org.json.JSONArray;
-import org.json.JSONException;
-import org.json.JSONObject;
-
-import java.util.ArrayList;
-
-@NeededForTesting
-public class MetadataEntryParser {
-
-    private final static String UNIQUE_CONTACT_ID = "unique_contact_id";
-    private final static String ACCOUNT_TYPE = "account_type";
-    private final static String CUSTOM_ACCOUNT_TYPE = "custom_account_type";
-    private final static String ENUM_VALUE_FOR_GOOGLE_ACCOUNT = "GOOGLE_ACCOUNT";
-    private final static String GOOGLE_ACCOUNT_TYPE = "com.google";
-    private final static String ENUM_VALUE_FOR_CUSTOM_ACCOUNT = "CUSTOM_ACCOUNT";
-    private final static String ACCOUNT_NAME = "account_name";
-    private final static String DATA_SET = "data_set";
-    private final static String ENUM_FOR_PLUS_DATA_SET = "GOOGLE_PLUS";
-    private final static String ENUM_FOR_CUSTOM_DATA_SET = "CUSTOM";
-    private final static String PLUS_DATA_SET_TYPE = "plus";
-    private final static String CUSTOM_DATA_SET = "custom_data_set";
-    private final static String CONTACT_ID = "contact_id";
-    private final static String CONTACT_PREFS = "contact_prefs";
-    private final static String SEND_TO_VOICEMAIL = "send_to_voicemail";
-    private final static String STARRED = "starred";
-    private final static String PINNED = "pinned";
-    private final static String AGGREGATION_DATA = "aggregation_data";
-    private final static String CONTACT_IDS = "contact_ids";
-    private final static String TYPE = "type";
-    private final static String FIELD_DATA = "field_data";
-    private final static String FIELD_DATA_ID = "field_data_id";
-    private final static String FIELD_DATA_PREFS = "field_data_prefs";
-    private final static String IS_PRIMARY = "is_primary";
-    private final static String IS_SUPER_PRIMARY = "is_super_primary";
-    private final static String USAGE_STATS = "usage_stats";
-    private final static String USAGE_TYPE = "usage_type";
-    private final static String LAST_TIME_USED = "last_time_used";
-    private final static String USAGE_COUNT = "usage_count";
-
-    @NeededForTesting
-    public static class UsageStats {
-        final String mUsageType;
-        final long mLastTimeUsed;
-        final int mTimesUsed;
-
-        @NeededForTesting
-        public UsageStats(String usageType, long lastTimeUsed, int timesUsed) {
-            this.mUsageType = usageType;
-            this.mLastTimeUsed = lastTimeUsed;
-            this.mTimesUsed = timesUsed;
-        }
-    }
-
-    @NeededForTesting
-    public static class FieldData {
-        final String mDataHashId;
-        final boolean mIsPrimary;
-        final boolean mIsSuperPrimary;
-        final ArrayList<UsageStats> mUsageStatsList;
-
-        @NeededForTesting
-        public FieldData(String dataHashId, boolean isPrimary, boolean isSuperPrimary,
-                ArrayList<UsageStats> usageStatsList) {
-            this.mDataHashId = dataHashId;
-            this.mIsPrimary = isPrimary;
-            this.mIsSuperPrimary = isSuperPrimary;
-            this.mUsageStatsList = usageStatsList;
-        }
-    }
-
-    @NeededForTesting
-    public static class RawContactInfo {
-        final String mBackupId;
-        final String mAccountType;
-        final String mAccountName;
-        final String mDataSet;
-
-        @NeededForTesting
-        public RawContactInfo(String backupId, String accountType, String accountName,
-                String dataSet) {
-            this.mBackupId = backupId;
-            this.mAccountType = accountType;
-            this.mAccountName = accountName;
-            mDataSet = dataSet;
-        }
-    }
-
-    @NeededForTesting
-    public static class AggregationData {
-        final RawContactInfo mRawContactInfo1;
-        final RawContactInfo mRawContactInfo2;
-        final String mType;
-
-        @NeededForTesting
-        public AggregationData(RawContactInfo rawContactInfo1, RawContactInfo rawContactInfo2,
-                String type) {
-            this.mRawContactInfo1 = rawContactInfo1;
-            this.mRawContactInfo2 = rawContactInfo2;
-            this.mType = type;
-        }
-    }
-
-    @NeededForTesting
-    public static class MetadataEntry {
-        final RawContactInfo mRawContactInfo;
-        final int mSendToVoicemail;
-        final int mStarred;
-        final int mPinned;
-        final ArrayList<FieldData> mFieldDatas;
-        final ArrayList<AggregationData> mAggregationDatas;
-
-        @NeededForTesting
-        public MetadataEntry(RawContactInfo rawContactInfo,
-                int sendToVoicemail, int starred, int pinned,
-                ArrayList<FieldData> fieldDatas,
-                ArrayList<AggregationData> aggregationDatas) {
-            this.mRawContactInfo = rawContactInfo;
-            this.mSendToVoicemail = sendToVoicemail;
-            this.mStarred = starred;
-            this.mPinned = pinned;
-            this.mFieldDatas = fieldDatas;
-            this.mAggregationDatas = aggregationDatas;
-        }
-    }
-
-    @NeededForTesting
-    static MetadataEntry parseDataToMetaDataEntry(String inputData) {
-        if (TextUtils.isEmpty(inputData)) {
-            throw new IllegalArgumentException("Input cannot be empty.");
-        }
-
-        try {
-            final JSONObject root = new JSONObject(inputData);
-            // Parse to get rawContactId and account info.
-            final JSONObject uniqueContactJSON = root.getJSONObject(UNIQUE_CONTACT_ID);
-            final RawContactInfo rawContactInfo = parseUniqueContact(uniqueContactJSON);
-
-            // Parse contactPrefs to get sendToVoicemail, starred, pinned.
-            final JSONObject contactPrefs = root.getJSONObject(CONTACT_PREFS);
-            final boolean sendToVoicemail = contactPrefs.getBoolean(SEND_TO_VOICEMAIL);
-            final boolean starred = contactPrefs.getBoolean(STARRED);
-            final int pinned = contactPrefs.getInt(PINNED);
-
-            // Parse aggregationDatas
-            final ArrayList<AggregationData> aggregationsList = new ArrayList<AggregationData>();
-            if (root.has(AGGREGATION_DATA)) {
-                final JSONArray aggregationDatas = root.getJSONArray(AGGREGATION_DATA);
-
-                for (int i = 0; i < aggregationDatas.length(); i++) {
-                    final JSONObject aggregationData = aggregationDatas.getJSONObject(i);
-                    final JSONArray contacts = aggregationData.getJSONArray(CONTACT_IDS);
-
-                    if (contacts.length() != 2) {
-                        throw new IllegalArgumentException(
-                                "There should be two contacts for each aggregation.");
-                    }
-                    final JSONObject rawContact1 = contacts.getJSONObject(0);
-                    final RawContactInfo aggregationContact1 = parseUniqueContact(rawContact1);
-                    final JSONObject rawContact2 = contacts.getJSONObject(1);
-                    final RawContactInfo aggregationContact2 = parseUniqueContact(rawContact2);
-                    final String type = aggregationData.getString(TYPE);
-                    if (TextUtils.isEmpty(type)) {
-                        throw new IllegalArgumentException("Aggregation type cannot be empty.");
-                    }
-
-                    final AggregationData aggregation = new AggregationData(
-                            aggregationContact1, aggregationContact2, type);
-                    aggregationsList.add(aggregation);
-                }
-            }
-
-            // Parse fieldDatas
-            final ArrayList<FieldData> fieldDatasList = new ArrayList<FieldData>();
-            if (root.has(FIELD_DATA)) {
-                final JSONArray fieldDatas = root.getJSONArray(FIELD_DATA);
-
-                for (int i = 0; i < fieldDatas.length(); i++) {
-                    final JSONObject fieldData = fieldDatas.getJSONObject(i);
-                    final String dataHashId = fieldData.getString(FIELD_DATA_ID);
-                    if (TextUtils.isEmpty(dataHashId)) {
-                        throw new IllegalArgumentException("Field data hash id cannot be empty.");
-                    }
-                    final JSONObject fieldDataPrefs = fieldData.getJSONObject(FIELD_DATA_PREFS);
-                    final boolean isPrimary = fieldDataPrefs.getBoolean(IS_PRIMARY);
-                    final boolean isSuperPrimary = fieldDataPrefs.getBoolean(IS_SUPER_PRIMARY);
-
-                    final ArrayList<UsageStats> usageStatsList = new ArrayList<UsageStats>();
-                    if (fieldData.has(USAGE_STATS)) {
-                        final JSONArray usageStats = fieldData.getJSONArray(USAGE_STATS);
-                        for (int j = 0; j < usageStats.length(); j++) {
-                            final JSONObject usageStat = usageStats.getJSONObject(j);
-                            final String usageType = usageStat.getString(USAGE_TYPE);
-                            if (TextUtils.isEmpty(usageType)) {
-                                throw new IllegalArgumentException("Usage type cannot be empty.");
-                            }
-                            final long lastTimeUsed = usageStat.getLong(LAST_TIME_USED);
-                            final int usageCount = usageStat.getInt(USAGE_COUNT);
-
-                            final UsageStats usageStatsParsed = new UsageStats(
-                                    usageType, lastTimeUsed, usageCount);
-                            usageStatsList.add(usageStatsParsed);
-                        }
-                    }
-
-                    final FieldData fieldDataParse = new FieldData(dataHashId, isPrimary,
-                            isSuperPrimary, usageStatsList);
-                    fieldDatasList.add(fieldDataParse);
-                }
-            }
-            final MetadataEntry metaDataEntry = new MetadataEntry(rawContactInfo,
-                    sendToVoicemail ? 1 : 0, starred ? 1 : 0, pinned,
-                    fieldDatasList, aggregationsList);
-            return metaDataEntry;
-        } catch (JSONException e) {
-            throw new IllegalArgumentException("JSON Exception.", e);
-        }
-    }
-
-    private static RawContactInfo parseUniqueContact(JSONObject uniqueContactJSON) {
-        try {
-            final String backupId = uniqueContactJSON.getString(CONTACT_ID);
-            final String accountName = uniqueContactJSON.getString(ACCOUNT_NAME);
-            String accountType = uniqueContactJSON.getString(ACCOUNT_TYPE);
-            if (ENUM_VALUE_FOR_GOOGLE_ACCOUNT.equals(accountType)) {
-                accountType = GOOGLE_ACCOUNT_TYPE;
-            } else if (ENUM_VALUE_FOR_CUSTOM_ACCOUNT.equals(accountType)) {
-                accountType = uniqueContactJSON.getString(CUSTOM_ACCOUNT_TYPE);
-            } else {
-                throw new IllegalArgumentException("Unknown account type.");
-            }
-
-            String dataSet = null;
-            switch (uniqueContactJSON.getString(DATA_SET)) {
-                case ENUM_FOR_PLUS_DATA_SET:
-                    dataSet = PLUS_DATA_SET_TYPE;
-                    break;
-                case ENUM_FOR_CUSTOM_DATA_SET:
-                    dataSet = uniqueContactJSON.getString(CUSTOM_DATA_SET);
-                    break;
-            }
-            if (TextUtils.isEmpty(backupId) || TextUtils.isEmpty(accountType)
-                    || TextUtils.isEmpty(accountName)) {
-                throw new IllegalArgumentException(
-                        "Contact backup id, account type, account name cannot be empty.");
-            }
-            final RawContactInfo rawContactInfo = new RawContactInfo(
-                    backupId, accountType, accountName, dataSet);
-            return rawContactInfo;
-        } catch (JSONException e) {
-            throw new IllegalArgumentException("JSON Exception.", e);
-        }
-    }
-}