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User.java
/* * Copyright (C) 2017 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.persistence.migrations; import android.arch.persistence.room.ColumnInfo; import android.arch.persistence.room.Entity; import android.arch.persistence.room.Ignore; import android.arch.persistence.room.PrimaryKey; import java.util.Date; import java.util.Random; /** * Immutable model class for a User and entity in the Room database. */ @Entity(tableName = "users") public class User { @PrimaryKey @ColumnInfo(name = "userid") private int mId; @ColumnInfo(name = "username") private String mUserName; @ColumnInfo(name = "last_update") private Date mDate; @Ignore public User(String userName) { // DO NOT USE Integer Random values for primary keys. // This is using an Integer to showcase a WRONG implementation that has to be fixed // afterwards by updating the schema. // The ID is updated to a UUID String in the room3 flavor. mId = new Random(Integer.MAX_VALUE).nextInt(); mUserName = userName; mDate = new Date(System.currentTimeMillis()); } public User(int id, String userName, Date date) { this.mId = id; this.mUserName = userName; this.mDate = date; } public int getId() { return mId; } public String getUserName() { return mUserName; } public Date getDate() { return mDate; } }