RxQueryResultBinderProvider.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.binderprovider
import androidx.room.ext.findTypeMirror
import androidx.room.processor.Context
import androidx.room.solver.ObservableQueryResultBinderProvider
import androidx.room.solver.RxType
import androidx.room.solver.query.result.QueryResultAdapter
import androidx.room.solver.query.result.QueryResultBinder
import androidx.room.solver.query.result.RxQueryResultBinder
import erasure
import isAssignableFrom
import javax.lang.model.type.DeclaredType
import javax.lang.model.type.TypeMirror
class RxQueryResultBinderProvider private constructor(
context: Context,
private val rxType: RxType
) : ObservableQueryResultBinderProvider(context) {
private val typeMirror: TypeMirror? by lazy {
context.processingEnv.findTypeMirror(rxType.className)
}
override fun extractTypeArg(declared: DeclaredType): TypeMirror = declared.typeArguments.first()
override fun create(
typeArg: TypeMirror,
resultAdapter: QueryResultAdapter?,
tableNames: Set<String>
): QueryResultBinder {
return RxQueryResultBinder(
rxType = rxType,
typeArg = typeArg,
queryTableNames = tableNames,
adapter = resultAdapter
)
}
override fun matches(declared: DeclaredType): Boolean =
declared.typeArguments.size == 1 && matchesRxType(declared)
private fun matchesRxType(declared: DeclaredType): Boolean {
if (typeMirror == null) {
return false
}
val typeUtils = context.processingEnv.typeUtils
val erasure = declared.erasure(typeUtils)
return erasure.isAssignableFrom(typeUtils, typeMirror!!)
}
companion object {
fun getAll(context: Context) = listOf(
RxType.RX2_FLOWABLE,
RxType.RX2_OBSERVABLE,
RxType.RX3_FLOWABLE,
RxType.RX3_OBSERVABLE
).map {
RxQueryResultBinderProvider(context, it).requireArtifact(
context = context,
requiredType = it.version.rxRoomClassName,
missingArtifactErrorMsg = it.version.missingArtifactMessage
)
}
}
}