| /** |
| * Copyright (C) 2017 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.server.broadcastradio; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.util.Slog; |
| |
| import java.util.Map; |
| import java.util.Set; |
| |
| class Convert { |
| private static final String TAG = "BroadcastRadioService.Convert"; |
| |
| /** |
| * Converts string map to an array that's easily accessible by native code. |
| * |
| * Calling this java method once is more efficient than converting map object on the native |
| * side, which requires several separate java calls for each element. |
| * |
| * @param map map to convert. |
| * @returns array (sized the same as map) of two-element string arrays |
| * (first element is the key, second is value). |
| */ |
| static @NonNull String[][] stringMapToNative(@Nullable Map<String, String> map) { |
| if (map == null) { |
| Slog.v(TAG, "map is null, returning zero-elements array"); |
| return new String[0][0]; |
| } |
| |
| Set<Map.Entry<String, String>> entries = map.entrySet(); |
| int len = entries.size(); |
| String[][] arr = new String[len][2]; |
| |
| int i = 0; |
| for (Map.Entry<String, String> entry : entries) { |
| arr[i][0] = entry.getKey(); |
| arr[i][1] = entry.getValue(); |
| i++; |
| } |
| |
| Slog.v(TAG, "converted " + i + " element(s)"); |
| return arr; |
| } |
| } |