SingleStatementTypeConverter.kt
/*
* Copyright 2021 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.types
import androidx.room.compiler.processing.XType
import androidx.room.ext.L
import androidx.room.ext.T
import androidx.room.solver.CodeGenScope
import com.squareup.javapoet.CodeBlock
/**
* A [TypeConverter] that has only 1 statement (e.g. foo ? bar : baz).
*/
abstract class SingleStatementTypeConverter(
from: XType,
to: XType
) : TypeConverter(
from, to
) {
final override fun doConvert(inputVarName: String, outputVarName: String, scope: CodeGenScope) {
scope.builder().apply {
addStatement("$L = $L", outputVarName, buildStatement(inputVarName, scope))
}
}
final override fun doConvert(inputVarName: String, scope: CodeGenScope): String {
val outputVarName = scope.getTmpVar()
scope.builder().apply {
addStatement(
"final $T $L = $L", to.typeName, outputVarName, buildStatement(inputVarName, scope)
)
}
return outputVarName
}
/**
* Returns a [CodeBlock] that will compute the [to] value.
*/
abstract fun buildStatement(
inputVarName: String,
scope: CodeGenScope
): CodeBlock
}