132 lines
4.4 KiB
Java
132 lines
4.4 KiB
Java
/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.safetycenter;
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import static android.os.Build.VERSION_CODES.TIRAMISU;
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import android.annotation.NonNull;
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import android.annotation.Nullable;
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import android.annotation.StringRes;
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import android.content.Context;
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import android.content.res.Resources;
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import android.safetycenter.config.SafetyCenterConfig;
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import android.util.Log;
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import androidx.annotation.RequiresApi;
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import com.android.safetycenter.config.ParseException;
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import com.android.safetycenter.config.SafetyCenterConfigParser;
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import com.android.safetycenter.resources.SafetyCenterResourcesContext;
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import java.io.InputStream;
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/**
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* A class that reads the {@link SafetyCenterConfig} from the associated {@link
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* SafetyCenterResourcesContext}.
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*/
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@RequiresApi(TIRAMISU)
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final class SafetyCenterConfigReader {
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private static final String TAG = "SafetyCenterConfigReade";
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private final Object mSafetyCenterConfigLock = new Object();
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@NonNull private final SafetyCenterResourcesContext mSafetyCenterResourcesContext;
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@Nullable private SafetyCenterConfig mSafetyCenterConfig;
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/**
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* Creates a {@link SafetyCenterConfigReader} from a {@link Context} object by wrapping it into
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* a {@link SafetyCenterResourcesContext}.
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*/
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SafetyCenterConfigReader(@NonNull Context context) {
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mSafetyCenterResourcesContext = new SafetyCenterResourcesContext(context);
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}
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/**
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* Returns the {@link SafetyCenterConfig} read by {@link #loadSafetyCenterConfig()}.
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*
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* <p>Returns {@code null} if {@link #loadSafetyCenterConfig()} was never called or if there was
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* an issue when reading the {@link SafetyCenterConfig}.
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*/
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@Nullable
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SafetyCenterConfig getSafetyCenterConfig() {
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if (mSafetyCenterConfig == null) {
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synchronized (mSafetyCenterConfigLock) {
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return mSafetyCenterConfig;
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}
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}
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return mSafetyCenterConfig;
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}
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/**
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* Returns a {@link String} resource from the given {@code stringId}, using the {@link
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* SafetyCenterResourcesContext}.
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*
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* <p>Returns {@code null} if the resources cannot be accessed or if {@code stringId} is equal
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* to {@link Resources#ID_NULL}. Otherwise, throws a {@link Resources.NotFoundException} if the
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* {@code stringId} is invalid.
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*/
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@Nullable
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String readStringResource(@StringRes int stringId) {
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if (stringId == Resources.ID_NULL) {
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return null;
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}
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Resources resources = mSafetyCenterResourcesContext.getResources();
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if (resources == null) {
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return null;
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}
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return resources.getString(stringId);
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}
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/**
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* Loads the {@link SafetyCenterConfig} for it to be available when calling {@link
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* #getSafetyCenterConfig()}.
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*/
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void loadSafetyCenterConfig() {
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synchronized (mSafetyCenterConfigLock) {
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mSafetyCenterConfig = readSafetyCenterConfig();
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}
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}
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@Nullable
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private SafetyCenterConfig readSafetyCenterConfig() {
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InputStream in = mSafetyCenterResourcesContext.getSafetyCenterConfig();
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if (in == null) {
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Log.e(TAG, "Cannot get safety center config file");
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return null;
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}
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Resources resources = mSafetyCenterResourcesContext.getResources();
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if (resources == null) {
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Log.e(TAG, "Cannot get safety center resources");
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return null;
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}
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try {
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SafetyCenterConfig safetyCenterConfig =
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SafetyCenterConfigParser.parseXmlResource(in, resources);
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Log.i(TAG, "SafetyCenterConfig read successfully");
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return safetyCenterConfig;
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} catch (ParseException e) {
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Log.e(TAG, "Cannot read SafetyCenterConfig", e);
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return null;
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}
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}
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}
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