| /* |
| * Copyright (C) 2016 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.documentsui; |
| |
| import android.annotation.Nullable; |
| import android.app.Activity; |
| import android.app.Fragment; |
| import android.content.Context; |
| import android.util.Log; |
| |
| import com.android.documentsui.base.CheckedTask; |
| import com.android.documentsui.base.DocumentInfo; |
| import com.android.documentsui.base.RootInfo; |
| |
| import java.util.function.Consumer; |
| |
| /** |
| * A {@link CheckedTask} that takes {@link RootInfo} and query SAF to obtain the |
| * {@link DocumentInfo} of its root document and call supplied callback to handle the |
| * {@link DocumentInfo}. |
| */ |
| public class GetRootDocumentTask extends CheckedTask<Void, DocumentInfo> { |
| |
| private final static String TAG = "GetRootDocumentTask"; |
| |
| private final RootInfo mRootInfo; |
| private final Context mContext; |
| private final Consumer<DocumentInfo> mCallback; |
| |
| public GetRootDocumentTask( |
| RootInfo rootInfo, Activity activity, Consumer<DocumentInfo> callback) { |
| this(rootInfo, activity, activity::isDestroyed, callback); |
| } |
| |
| public GetRootDocumentTask( |
| RootInfo rootInfo, Fragment fragment, Consumer<DocumentInfo> callback) { |
| this(rootInfo, fragment.getContext(), fragment::isDetached, callback); |
| } |
| |
| public GetRootDocumentTask( |
| RootInfo rootInfo, Context context, Check check, Consumer<DocumentInfo> callback) { |
| super(check); |
| mRootInfo = rootInfo; |
| mContext = context.getApplicationContext(); |
| mCallback = callback; |
| } |
| |
| @Override |
| public @Nullable DocumentInfo run(Void... rootInfo) { |
| return mRootInfo.getRootDocumentBlocking(mContext); |
| } |
| |
| @Override |
| public void finish(@Nullable DocumentInfo documentInfo) { |
| if (documentInfo != null) { |
| mCallback.accept(documentInfo); |
| } else { |
| Log.e(TAG, "Cannot find document info for root: " + mRootInfo); |
| } |
| } |
| } |