1/* 2 * Copyright (C) 2017 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 17package androidx.work.impl.model; 18 19import android.arch.persistence.room.ColumnInfo; 20import android.arch.persistence.room.Entity; 21import android.arch.persistence.room.ForeignKey; 22import android.arch.persistence.room.Index; 23import android.support.annotation.NonNull; 24import android.support.annotation.RestrictTo; 25 26/** 27 * Database entity that defines a dependency between two {@link WorkSpec}s. 28 * 29 * @hide 30 */ 31 32@Entity(foreignKeys = { 33 @ForeignKey( 34 entity = WorkSpec.class, 35 parentColumns = "id", 36 childColumns = "work_spec_id", 37 onDelete = ForeignKey.CASCADE, 38 onUpdate = ForeignKey.CASCADE), 39 @ForeignKey( 40 entity = WorkSpec.class, 41 parentColumns = "id", 42 childColumns = "prerequisite_id", 43 onDelete = ForeignKey.CASCADE, 44 onUpdate = ForeignKey.CASCADE)}, 45 primaryKeys = {"work_spec_id", "prerequisite_id"}, 46 indices = { 47 @Index(value = {"work_spec_id"}), 48 @Index(value = {"prerequisite_id"})}) 49@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP) 50public class Dependency { 51 @NonNull 52 @ColumnInfo(name = "work_spec_id") 53 public final String workSpecId; 54 55 @NonNull 56 @ColumnInfo(name = "prerequisite_id") 57 public final String prerequisiteId; 58 59 public Dependency(@NonNull String workSpecId, @NonNull String prerequisiteId) { 60 this.workSpecId = workSpecId; 61 this.prerequisiteId = prerequisiteId; 62 } 63} 64