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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.contacts.common.model.account;
     18 
     19 import android.content.Context;
     20 import android.database.Cursor;
     21 import android.net.Uri;
     22 import android.provider.BaseColumns;
     23 import android.provider.ContactsContract;
     24 import android.provider.ContactsContract.RawContacts;
     25 import android.text.TextUtils;
     26 
     27 import com.google.common.base.Objects;
     28 
     29 
     30 /**
     31  * Encapsulates an "account type" string and a "data set" string.
     32  */
     33 public class AccountTypeWithDataSet {
     34 
     35     private static final String[] ID_PROJECTION = new String[] {BaseColumns._ID};
     36     private static final Uri RAW_CONTACTS_URI_LIMIT_1 = RawContacts.CONTENT_URI.buildUpon()
     37             .appendQueryParameter(ContactsContract.LIMIT_PARAM_KEY, "1").build();
     38 
     39     /** account type.  Can be null for fallback type. */
     40     public final String accountType;
     41 
     42     /** dataSet may be null, but never be "". */
     43     public final String dataSet;
     44 
     45     private AccountTypeWithDataSet(String accountType, String dataSet) {
     46         this.accountType = TextUtils.isEmpty(accountType) ? null : accountType;
     47         this.dataSet = TextUtils.isEmpty(dataSet) ? null : dataSet;
     48     }
     49 
     50     public static AccountTypeWithDataSet get(String accountType, String dataSet) {
     51         return new AccountTypeWithDataSet(accountType, dataSet);
     52     }
     53 
     54     /**
     55      * Return true if there are any contacts in the database with this account type and data set.
     56      * Touches DB. Don't use in the UI thread.
     57      */
     58     public boolean hasData(Context context) {
     59         final String BASE_SELECTION = RawContacts.ACCOUNT_TYPE + " = ?";
     60         final String selection;
     61         final String[] args;
     62         if (TextUtils.isEmpty(dataSet)) {
     63             selection = BASE_SELECTION + " AND " + RawContacts.DATA_SET + " IS NULL";
     64             args = new String[] {accountType};
     65         } else {
     66             selection = BASE_SELECTION + " AND " + RawContacts.DATA_SET + " = ?";
     67             args = new String[] {accountType, dataSet};
     68         }
     69 
     70         final Cursor c = context.getContentResolver().query(RAW_CONTACTS_URI_LIMIT_1,
     71                 ID_PROJECTION, selection, args, null);
     72         if (c == null) return false;
     73         try {
     74             return c.moveToFirst();
     75         } finally {
     76             c.close();
     77         }
     78     }
     79 
     80     @Override
     81     public boolean equals(Object o) {
     82         if (!(o instanceof AccountTypeWithDataSet)) return false;
     83 
     84         AccountTypeWithDataSet other = (AccountTypeWithDataSet) o;
     85         return Objects.equal(accountType, other.accountType)
     86                 && Objects.equal(dataSet, other.dataSet);
     87     }
     88 
     89     @Override
     90     public int hashCode() {
     91         return (accountType == null ? 0 : accountType.hashCode())
     92                 ^ (dataSet == null ? 0 : dataSet.hashCode());
     93     }
     94 
     95     @Override
     96     public String toString() {
     97         return "[" + accountType + "/" + dataSet + "]";
     98     }
     99 }
    100