RxQueryResultBinder.kt
/*
* 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.solver.query.result
import androidx.room.ext.L
import androidx.room.ext.N
import androidx.room.ext.RoomRxJava2TypeNames
import androidx.room.ext.RxJava2TypeNames
import androidx.room.ext.T
import androidx.room.ext.CallableTypeSpecBuilder
import androidx.room.ext.arrayTypeName
import androidx.room.ext.typeName
import androidx.room.solver.CodeGenScope
import com.squareup.javapoet.ClassName
import com.squareup.javapoet.FieldSpec
import javax.lang.model.type.TypeMirror
/**
* Binds the result as an RxJava2 Flowable, Publisher and Observable.
*/
class RxQueryResultBinder(
private val rxType: RxType,
val typeArg: TypeMirror,
val queryTableNames: Set<String>,
adapter: QueryResultAdapter?
) : BaseObservableQueryResultBinder(adapter) {
override fun convertAndReturn(
roomSQLiteQueryVar: String,
canReleaseQuery: Boolean,
dbField: FieldSpec,
inTransaction: Boolean,
scope: CodeGenScope
) {
val callableImpl = CallableTypeSpecBuilder(typeArg.typeName()) {
createRunQueryAndReturnStatements(builder = this,
roomSQLiteQueryVar = roomSQLiteQueryVar,
inTransaction = inTransaction,
dbField = dbField,
scope = scope,
cancellationSignalVar = "null")
}.apply {
if (canReleaseQuery) {
addMethod(createFinalizeMethod(roomSQLiteQueryVar))
}
}.build()
scope.builder().apply {
val tableNamesList = queryTableNames.joinToString(",") { "\"$it\"" }
addStatement("return $T.$N($N, $L, new $T{$L}, $L)",
RoomRxJava2TypeNames.RX_ROOM,
rxType.methodName,
dbField,
if (inTransaction) "true" else "false",
String::class.arrayTypeName(),
tableNamesList,
callableImpl)
}
}
enum class RxType(val className: ClassName, val methodName: String) {
FLOWABLE(RxJava2TypeNames.FLOWABLE, RoomRxJava2TypeNames.RX_ROOM_CREATE_FLOWABLE),
OBSERVABLE(RxJava2TypeNames.OBSERVABLE, RoomRxJava2TypeNames.RX_ROOM_CREATE_OBSERVABLE)
}
}