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CommentDao.java

/*
 * Copyright 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.db.dao;

import android.arch.lifecycle.LiveData;
import android.arch.persistence.room.Dao;
import android.arch.persistence.room.Insert;
import android.arch.persistence.room.OnConflictStrategy;
import android.arch.persistence.room.Query;

import com.example.android.persistence.db.entity.CommentEntity;

import java.util.List;

@Dao
public interface CommentDao {
    @Query("SELECT * FROM comments where productId = :productId")
    LiveData<List<CommentEntity>> loadComments(int productId);

@Query("SELECT * FROM comments where productId = :productId")
    List<CommentEntity> loadCommentsSync(int productId);

@Insert(onConflict = OnConflictStrategy.REPLACE)
    void insertAll(List<CommentEntity> products);
}