/
City.java
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/
City.java
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/***
Copyright (c) 2017 CommonsWare, LLC
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.
Covered in detail in the book _Android's Architecture Components_
https://commonsware.com/AndroidArch
*/
package com.commonsware.android.citypop;
import android.arch.paging.DataSource;
import android.arch.persistence.room.Dao;
import android.arch.persistence.room.Entity;
import android.arch.persistence.room.PrimaryKey;
import android.arch.persistence.room.Query;
import android.support.annotation.NonNull;
import java.util.List;
@Entity(tableName = "cities")
class City {
@PrimaryKey
@NonNull
final String id;
final String country;
final String city;
final int population;
City(@NonNull String id, String country, String city, int population) {
this.id=id;
this.country=country;
this.city=city;
this.population=population;
}
@Override
public String toString() {
return(city);
}
@Override
public boolean equals(Object obj) {
if (obj instanceof City) {
City other=(City)obj;
return(id.equals(other.id));
}
return(false);
}
@Override
public int hashCode() {
return(id.hashCode());
}
@Dao
interface Store {
@Query("SELECT * FROM cities ORDER BY population DESC")
List<City> allByPopulation();
@Query("SELECT * FROM cities ORDER BY population DESC")
DataSource.Factory<Integer, City> pagedByPopulation();
}
}