OnConflictStrategy.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 androidx.room;
import androidx.annotation.IntDef;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
/**
* Set of conflict handling strategies for various {@link Dao} methods.
*/
@Retention(RetentionPolicy.CLASS)
@IntDef({OnConflictStrategy.REPLACE, OnConflictStrategy.ROLLBACK, OnConflictStrategy.ABORT,
OnConflictStrategy.FAIL, OnConflictStrategy.IGNORE})
public @interface OnConflictStrategy {
/**
* OnConflict strategy constant to replace the old data and continue the transaction.
* <p>
* An {@link Insert} DAO method that returns the inserted rows ids will never return -1 since
* this strategy will always insert a row even if there is a conflict.
*/
int REPLACE = 1;
/**
* OnConflict strategy constant to rollback the transaction.
*
* @deprecated Does not work with Android's current SQLite bindings. Use {@link #ABORT} to
* roll back the transaction.
*/
@Deprecated
int ROLLBACK = 2;
/**
* OnConflict strategy constant to abort the transaction. <em>The transaction is rolled
* back.</em>
*/
int ABORT = 3;
/**
* OnConflict strategy constant to fail the transaction.
*
* @deprecated Does not work as expected. The transaction is rolled back. Use {@link #ABORT}.
*/
@Deprecated
int FAIL = 4;
/**
* OnConflict strategy constant to ignore the conflict.
* <p>
* An {@link Insert} DAO method that returns the inserted rows ids will return -1 for rows
* that are not inserted since this strategy will ignore the row if there is a conflict.
*/
int IGNORE = 5;
}