CallablePreparedQueryResultBinder.kt
/*
* 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.prepared.binder
import androidx.room.compiler.processing.XType
import androidx.room.ext.CallableTypeSpecBuilder
import androidx.room.solver.CodeGenScope
import androidx.room.solver.prepared.result.PreparedQueryResultAdapter
import com.squareup.javapoet.CodeBlock
import com.squareup.javapoet.FieldSpec
import com.squareup.javapoet.TypeSpec
/**
* Binder for deferred queries.
*
* This binder will create a Callable implementation that delegates to the
* [PreparedQueryResultAdapter]. Usage of the Callable impl is then delegate to the [addStmntBlock]
* function.
*/
class CallablePreparedQueryResultBinder private constructor(
val returnType: XType,
val addStmntBlock: CodeBlock.Builder.(callableImpl: TypeSpec, dbField: FieldSpec) -> Unit,
adapter: PreparedQueryResultAdapter?
) : PreparedQueryResultBinder(adapter) {
companion object {
fun createPreparedBinder(
returnType: XType,
adapter: PreparedQueryResultAdapter?,
addCodeBlock: CodeBlock.Builder.(callableImpl: TypeSpec, dbField: FieldSpec) -> Unit
) = CallablePreparedQueryResultBinder(returnType, addCodeBlock, adapter)
}
override fun executeAndReturn(
prepareQueryStmtBlock: CodeGenScope.() -> String,
preparedStmtField: String?,
dbField: FieldSpec,
scope: CodeGenScope
) {
val binderScope = scope.fork()
val callableImpl = CallableTypeSpecBuilder(returnType.typeName) {
adapter?.executeAndReturn(
binderScope.prepareQueryStmtBlock(),
preparedStmtField,
dbField,
binderScope
)
addCode(binderScope.builder().build())
}.build()
scope.builder().apply {
addStmntBlock(callableImpl, dbField)
}
}
}