EmptyResultSetException.java
/*
* Copyright (C) 2020 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 androidx.room.rxjava3;
import androidx.annotation.NonNull;
/**
* Thrown by Room when the query in a Single<T> DAO method needs to return a result but the
* returned result from the database is empty.
* <p>
* Since a Single<T> must either emit a single non-null value or an error, this exception is
* thrown instead of emitting a null value when the query resulted empty. If the Single<T>
* contains a type argument of a collection (e.g. Single<List<Song>>) then this
* exception is not thrown an an empty collection is emitted instead.
*/
public final class EmptyResultSetException extends RuntimeException {
/**
* Constructs a new EmptyResultSetException with the exception.
* @param message The SQL query which didn't return any results.
*/
public EmptyResultSetException(@NonNull String message) {
super(message);
}
}