1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.documentsui.roots; 18 19 import androidx.annotation.Nullable; 20 import android.app.Activity; 21 import android.util.Log; 22 23 import com.android.documentsui.DocumentsAccess; 24 import com.android.documentsui.TimeoutTask; 25 import com.android.documentsui.base.CheckedTask; 26 import com.android.documentsui.base.DocumentInfo; 27 import com.android.documentsui.base.RootInfo; 28 29 import java.util.function.Consumer; 30 31 /** 32 * A {@link CheckedTask} that takes {@link RootInfo} and query SAF to obtain the 33 * {@link DocumentInfo} of its root document and call supplied callback to handle the 34 * {@link DocumentInfo}. 35 */ 36 public class GetRootDocumentTask extends TimeoutTask<Void, DocumentInfo> { 37 38 private final static String TAG = "GetRootDocumentTask"; 39 40 private final RootInfo mRootInfo; 41 private final Consumer<DocumentInfo> mCallback; 42 private final DocumentsAccess mDocs; 43 GetRootDocumentTask( RootInfo rootInfo, Activity activity, long timeout, DocumentsAccess docs, Consumer<DocumentInfo> callback)44 public GetRootDocumentTask( 45 RootInfo rootInfo, 46 Activity activity, 47 long timeout, 48 DocumentsAccess docs, 49 Consumer<DocumentInfo> callback) { 50 super(activity::isDestroyed, timeout); 51 mRootInfo = rootInfo; 52 mDocs = docs; 53 mCallback = callback; 54 } 55 56 @Override run(Void... args)57 public @Nullable DocumentInfo run(Void... args) { 58 return mDocs.getRootDocument(mRootInfo); 59 } 60 61 @Override finish(@ullable DocumentInfo documentInfo)62 public void finish(@Nullable DocumentInfo documentInfo) { 63 if (documentInfo == null) { 64 Log.e(TAG, 65 "Cannot find document info for root: " + mRootInfo); 66 } 67 68 mCallback.accept(documentInfo); 69 } 70 } 71