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      1 /*
      2  * Copyright (C) 2010 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.exchange.provider;
     18 
     19 import com.android.exchange.EasSyncService;
     20 import com.android.exchange.provider.GalResult.GalData;
     21 
     22 import android.content.ContentProvider;
     23 import android.content.ContentValues;
     24 import android.content.UriMatcher;
     25 import android.database.Cursor;
     26 import android.database.MatrixCursor;
     27 import android.net.Uri;
     28 import android.os.Bundle;
     29 
     30 /**
     31  * ExchangeProvider provides real-time data from the Exchange server; at the moment, it is used
     32  * solely to provide GAL (Global Address Lookup) service to email address adapters
     33  */
     34 public class ExchangeProvider extends ContentProvider {
     35     public static final String EXCHANGE_AUTHORITY = "com.android.exchange.provider";
     36     public static final Uri GAL_URI = Uri.parse("content://" + EXCHANGE_AUTHORITY + "/gal/");
     37 
     38     private static final int GAL_BASE = 0;
     39     private static final int GAL_FILTER = GAL_BASE;
     40 
     41     public static final String[] GAL_PROJECTION = new String[] {"_id", "displayName", "data"};
     42     public static final int GAL_COLUMN_ID = 0;
     43     public static final int GAL_COLUMN_DISPLAYNAME = 1;
     44     public static final int GAL_COLUMN_DATA = 2;
     45 
     46     public static final String EXTRAS_TOTAL_RESULTS = "com.android.exchange.provider.TOTAL_RESULTS";
     47 
     48     private static final UriMatcher sURIMatcher = new UriMatcher(UriMatcher.NO_MATCH);
     49 
     50     static {
     51         // Exchange URI matching table
     52         UriMatcher matcher = sURIMatcher;
     53         // The URI for GAL lookup contains three user-supplied parameters in the path:
     54         // 1) the account id of the Exchange account
     55         // 2) the constraint (filter) text
     56         matcher.addURI(EXCHANGE_AUTHORITY, "gal/*/*", GAL_FILTER);
     57     }
     58 
     59     private static void addGalDataRow(MatrixCursor mc, long id, String name, String address) {
     60         mc.newRow().add(id).add(name).add(address);
     61     }
     62 
     63     @Override
     64     public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
     65             String sortOrder) {
     66         int match = sURIMatcher.match(uri);
     67         switch (match) {
     68             case GAL_FILTER:
     69                 long accountId = -1;
     70                 // Pull out our parameters
     71                 MatrixCursorExtras c = new MatrixCursorExtras(GAL_PROJECTION);
     72                 String accountIdString = uri.getPathSegments().get(1);
     73                 String filter = uri.getPathSegments().get(2);
     74                 // Make sure we get a valid id; otherwise throw an exception
     75                 try {
     76                     accountId = Long.parseLong(accountIdString);
     77                 } catch (NumberFormatException e) {
     78                     throw new IllegalArgumentException("Illegal value in URI");
     79                 }
     80                 // Get results from the Exchange account
     81                 GalResult galResult = EasSyncService.searchGal(getContext(), accountId, filter);
     82                 if (galResult != null) {
     83                     for (GalData data : galResult.galData) {
     84                         addGalDataRow(c, data._id, data.displayName, data.emailAddress);
     85                     }
     86                     // Use cursor side channel to report metadata
     87                     final Bundle bundle = new Bundle();
     88                     bundle.putInt(EXTRAS_TOTAL_RESULTS, galResult.total);
     89                     c.setExtras(bundle);
     90                 }
     91                 return c;
     92             default:
     93                 throw new IllegalArgumentException("Unknown URI " + uri);
     94         }
     95     }
     96 
     97     @Override
     98     public int delete(Uri uri, String selection, String[] selectionArgs) {
     99         return -1;
    100     }
    101 
    102     @Override
    103     public String getType(Uri uri) {
    104         return "vnd.android.cursor.dir/gal-entry";
    105     }
    106 
    107     @Override
    108     public Uri insert(Uri uri, ContentValues values) {
    109         return null;
    110     }
    111 
    112     @Override
    113     public boolean onCreate() {
    114         return false;
    115     }
    116 
    117     @Override
    118     public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
    119         return -1;
    120     }
    121 
    122     /**
    123      * A simple extension to MatrixCursor that supports extras
    124      */
    125     private static class MatrixCursorExtras extends MatrixCursor {
    126 
    127         private Bundle mExtras;
    128 
    129         public MatrixCursorExtras(String[] columnNames) {
    130             super(columnNames);
    131             mExtras = null;
    132         }
    133 
    134         public void setExtras(Bundle extras) {
    135             mExtras = extras;
    136         }
    137 
    138         @Override
    139         public Bundle getExtras() {
    140             return mExtras;
    141         }
    142     }
    143 }
    144