1/*
2* Copyright (C) 2014 Samsung System LSI
3* Licensed under the Apache License, Version 2.0 (the "License");
4* you may not use this file except in compliance with the License.
5* You may obtain a copy of the License at
6*
7*      http://www.apache.org/licenses/LICENSE-2.0
8*
9* Unless required by applicable law or agreed to in writing, software
10* distributed under the License is distributed on an "AS IS" BASIS,
11* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12* See the License for the specific language governing permissions and
13* limitations under the License.
14*/
15package com.android.bluetooth.map;
16
17import android.annotation.TargetApi;
18import android.content.ContentProvider;
19import android.content.ContentValues;
20import android.database.Cursor;
21import android.net.Uri;
22import android.os.Bundle;
23import android.os.ParcelFileDescriptor;
24import android.provider.Telephony.Mms;
25import android.util.Log;
26
27import com.google.android.mms.MmsException;
28import com.google.android.mms.pdu.GenericPdu;
29import com.google.android.mms.pdu.PduComposer;
30import com.google.android.mms.pdu.PduPersister;
31
32import java.io.FileNotFoundException;
33import java.io.FileOutputStream;
34import java.io.IOException;
35import java.net.URI;
36
37/**
38 * Provider to let the MMS subsystem read data from it own database from another process.
39 * Workaround for missing access to sendStoredMessage().
40 */
41@TargetApi(19)
42public class MmsFileProvider extends ContentProvider {
43    static final String TAG = "BluetoothMmsFileProvider";
44    private PipeWriter mPipeWriter = new PipeWriter();
45
46    /*package*/
47    static final Uri CONTENT_URI = Uri.parse("content://com.android.bluetooth.map.MmsFileProvider");
48
49    @Override
50    public boolean onCreate() {
51        return true;
52    }
53
54    @Override
55    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
56            String sortOrder) {
57        // Don't support queries.
58        return null;
59    }
60
61    @Override
62    public Uri insert(Uri uri, ContentValues values) {
63        // Don't support inserts.
64        return null;
65    }
66
67    @Override
68    public int delete(Uri uri, String selection, String[] selectionArgs) {
69        // Don't support deletes.
70        return 0;
71    }
72
73    @Override
74    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
75        // Don't support updates.
76        return 0;
77    }
78
79    @Override
80    public String getType(Uri uri) {
81        // For this sample, assume all files have no type.
82        return null;
83    }
84
85    @Override
86    public ParcelFileDescriptor openFile(Uri uri, String fileMode) throws FileNotFoundException {
87        String idStr = uri.getLastPathSegment();
88        if(idStr == null) {
89            throw new FileNotFoundException("Unable to extract message handle from: " + uri);
90        }
91        try {
92            long id = Long.parseLong(idStr);
93        } catch (NumberFormatException e) {
94            Log.w(TAG,e);
95            throw new FileNotFoundException("Unable to extract message handle from: " + uri);
96        }
97        Uri messageUri = Mms.CONTENT_URI.buildUpon().appendEncodedPath(idStr).build();
98
99        return openPipeHelper (messageUri, null, null, null, mPipeWriter);
100    }
101
102
103    public class PipeWriter implements PipeDataWriter<Cursor> {
104        /**
105         * Generate a message based on the cursor, and write the encoded data to the stream.
106         */
107
108        public void writeDataToPipe(ParcelFileDescriptor output, Uri uri, String mimeType,
109                Bundle opts, Cursor c) {
110            if (BluetoothMapService.DEBUG) Log.d(TAG, "writeDataToPipe(): uri=" + uri.toString() +
111                    " - getLastPathSegment() = " + uri.getLastPathSegment());
112
113            FileOutputStream fout = null;
114            GenericPdu pdu = null;
115            PduPersister pduPersister = null;
116
117            try {
118                fout = new FileOutputStream(output.getFileDescriptor());
119                pduPersister = PduPersister.getPduPersister(getContext());
120                pdu = pduPersister.load(uri);
121                byte[] bytes = (new PduComposer(getContext(), pdu)).make();
122                fout.write(bytes);
123
124            } catch (IOException e) {
125                Log.w(TAG, e);
126                /* TODO: How to signal the error to the calling entity? Had expected writeDataToPipe
127                 *       to throw IOException?
128                 */
129            } catch (MmsException e) {
130                Log.w(TAG, e);
131                /* TODO: How to signal the error to the calling entity? Had expected writeDataToPipe
132                 *       to throw IOException?
133                 */
134            } finally {
135                if(pduPersister != null) pduPersister.release();
136                try {
137                    fout.flush();
138                } catch (IOException e) {
139                    Log.w(TAG, "IOException: ", e);
140                }
141                try {
142                    fout.close();
143                } catch (IOException e) {
144                    Log.w(TAG, "IOException: ", e);
145                }
146            }
147        }
148    }
149
150
151}
152