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author | Zhomart Mukhamejanov <zhomart@google.com> | 2018-04-17 22:20:22 +0200 |
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committer | Zhomart Mukhamejanov <zhomart@google.com> | 2018-04-25 20:55:25 +0200 |
commit | f4d280ce40ba0aa50d6b2c70d8031ddf7678d179 (patch) | |
tree | 2496e77be97d432a36f0250bebf12dcf498ca851 /sample_updater/src/com/example/android/systemupdatersample/util/UpdateConfigs.java | |
parent | Merge "updater: Remove an unneeded strdup()." (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | sample_updater/src/com/example/android/systemupdatersample/util/UpdateConfigs.java | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/sample_updater/src/com/example/android/systemupdatersample/util/UpdateConfigs.java b/sample_updater/src/com/example/android/systemupdatersample/util/UpdateConfigs.java new file mode 100644 index 000000000..089f8b2f2 --- /dev/null +++ b/sample_updater/src/com/example/android/systemupdatersample/util/UpdateConfigs.java @@ -0,0 +1,82 @@ +/* + * Copyright (C) 2018 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.example.android.systemupdatersample.util; + +import android.content.Context; + +import com.example.android.systemupdatersample.UpdateConfig; + +import java.io.File; +import java.nio.charset.StandardCharsets; +import java.nio.file.Files; +import java.nio.file.Paths; +import java.util.ArrayList; +import java.util.List; + +/** + * Utility class for working with json update configurations. + */ +public final class UpdateConfigs { + + private static final String UPDATE_CONFIGS_ROOT = "configs/"; + + /** + * @param configs update configs + * @return list of names + */ + public static String[] configsToNames(List<UpdateConfig> configs) { + return configs.stream().map(UpdateConfig::getName).toArray(String[]::new); + } + + /** + * @param context app context + * @return configs root directory + */ + public static String getConfigsRoot(Context context) { + return Paths.get(context.getFilesDir().toString(), + UPDATE_CONFIGS_ROOT).toString(); + } + + /** + * It parses only {@code .json} files. + * + * @param context application context + * @return list of configs from directory {@link UpdateConfigs#getConfigsRoot} + */ + public static List<UpdateConfig> getUpdateConfigs(Context context) { + File root = new File(getConfigsRoot(context)); + ArrayList<UpdateConfig> configs = new ArrayList<>(); + if (!root.exists()) { + return configs; + } + for (final File f : root.listFiles()) { + if (!f.isDirectory() && f.getName().endsWith(".json")) { + try { + String json = new String(Files.readAllBytes(f.toPath()), + StandardCharsets.UTF_8); + configs.add(UpdateConfig.fromJson(json)); + } catch (Exception e) { + throw new RuntimeException( + "Can't read/parse config file " + f.getName(), e); + } + } + } + return configs; + } + + private UpdateConfigs() {} +} |