mirror of https://github.com/M66B/FairEmail.git
116 lines
3.6 KiB
Java
116 lines
3.6 KiB
Java
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package androidx.room;
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import androidx.annotation.RestrictTo;
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import androidx.sqlite.db.SupportSQLiteStatement;
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/**
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* Implementations of this class knows how to delete or update a particular entity.
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* <p>
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* This is an internal library class and all of its implementations are auto-generated.
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*
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* @param <T> The type parameter of the entity to be deleted
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* @hide
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*/
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@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP_PREFIX)
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@SuppressWarnings({"WeakerAccess", "unused"})
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public abstract class EntityDeletionOrUpdateAdapter<T> extends SharedSQLiteStatement {
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/**
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* Creates a DeletionOrUpdateAdapter that can delete or update the entity type T on the given
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* database.
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*
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* @param database The database to delete / update the item in.
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*/
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public EntityDeletionOrUpdateAdapter(RoomDatabase database) {
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super(database);
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}
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/**
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* Create the deletion or update query
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*
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* @return An SQL query that can delete or update instances of T.
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*/
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@Override
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protected abstract String createQuery();
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/**
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* Binds the entity into the given statement.
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*
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* @param statement The SQLite statement that prepared for the query returned from
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* createQuery.
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* @param entity The entity of type T.
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*/
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protected abstract void bind(SupportSQLiteStatement statement, T entity);
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/**
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* Deletes or updates the given entities in the database and returns the affected row count.
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*
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* @param entity The entity to delete or update
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* @return The number of affected rows
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*/
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public final int handle(T entity) {
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final SupportSQLiteStatement stmt = acquire();
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try {
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bind(stmt, entity);
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return stmt.executeUpdateDelete();
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} finally {
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release(stmt);
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}
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}
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/**
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* Deletes or updates the given entities in the database and returns the affected row count.
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*
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* @param entities Entities to delete or update
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* @return The number of affected rows
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*/
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public final int handleMultiple(Iterable<? extends T> entities) {
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final SupportSQLiteStatement stmt = acquire();
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try {
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int total = 0;
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for (T entity : entities) {
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bind(stmt, entity);
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total += stmt.executeUpdateDelete();
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}
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return total;
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} finally {
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release(stmt);
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}
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}
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/**
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* Deletes or updates the given entities in the database and returns the affected row count.
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*
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* @param entities Entities to delete or update
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* @return The number of affected rows
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*/
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public final int handleMultiple(T[] entities) {
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final SupportSQLiteStatement stmt = acquire();
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try {
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int total = 0;
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for (T entity : entities) {
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bind(stmt, entity);
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total += stmt.executeUpdateDelete();
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}
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return total;
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} finally {
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release(stmt);
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}
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}
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}
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