| /* |
| * Copyright 2018 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.solver.query.result |
| |
| import androidx.room.ext.AndroidTypeNames |
| import androidx.room.ext.CallableTypeSpecBuilder |
| import androidx.room.ext.L |
| import androidx.room.ext.N |
| import androidx.room.ext.RoomGuavaTypeNames |
| import androidx.room.ext.RoomTypeNames |
| import androidx.room.ext.T |
| import androidx.room.processing.XType |
| import androidx.room.solver.CodeGenScope |
| import com.squareup.javapoet.FieldSpec |
| |
| /** |
| * A ResultBinder that emits a ListenableFuture<T> where T is the input {@code typeArg}. |
| * |
| * <p>The Future runs on the background thread Executor. |
| */ |
| class GuavaListenableFutureQueryResultBinder( |
| val typeArg: XType, |
| adapter: QueryResultAdapter? |
| ) : BaseObservableQueryResultBinder(adapter) { |
| |
| override fun convertAndReturn( |
| roomSQLiteQueryVar: String, |
| canReleaseQuery: Boolean, |
| dbField: FieldSpec, |
| inTransaction: Boolean, |
| scope: CodeGenScope |
| ) { |
| val cancellationSignalVar = scope.getTmpVar("_cancellationSignal") |
| scope.builder().addStatement( |
| "final $T $L = $T.createCancellationSignal()", |
| AndroidTypeNames.CANCELLATION_SIGNAL, |
| cancellationSignalVar, |
| RoomTypeNames.DB_UTIL |
| ) |
| |
| // Callable<T> // Note that this callable does not release the query object. |
| val callableImpl = CallableTypeSpecBuilder(typeArg.typeName) { |
| createRunQueryAndReturnStatements( |
| builder = this, |
| roomSQLiteQueryVar = roomSQLiteQueryVar, |
| dbField = dbField, |
| inTransaction = inTransaction, |
| scope = scope, |
| cancellationSignalVar = cancellationSignalVar |
| ) |
| }.build() |
| |
| scope.builder().apply { |
| addStatement( |
| "return $T.createListenableFuture($N, $L, $L, $L, $L, $L)", |
| RoomGuavaTypeNames.GUAVA_ROOM, |
| dbField, |
| if (inTransaction) "true" else "false", |
| callableImpl, |
| roomSQLiteQueryVar, |
| canReleaseQuery, |
| cancellationSignalVar |
| ) |
| } |
| } |
| } |