CompositeAdapter.kt
/*
* Copyright (C) 2016 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.ext.L
import androidx.room.ext.T
import androidx.room.compiler.processing.XType
import androidx.room.solver.CodeGenScope
/**
* A column adapter that uses a type converter to do the conversion. The type converter may be
* a composite one.
*/
class CompositeAdapter(
out: XType,
val columnTypeAdapter: ColumnTypeAdapter,
val intoStatementConverter: TypeConverter?,
val fromCursorConverter: TypeConverter?
) :
ColumnTypeAdapter(out, columnTypeAdapter.typeAffinity) {
override fun readFromCursor(
outVarName: String,
cursorVarName: String,
indexVarName: String,
scope: CodeGenScope
) {
if (fromCursorConverter == null) {
return
}
scope.builder().apply {
val tmpCursorValue = scope.getTmpVar()
addStatement("final $T $L", columnTypeAdapter.outTypeName, tmpCursorValue)
columnTypeAdapter.readFromCursor(tmpCursorValue, cursorVarName, indexVarName, scope)
fromCursorConverter.convert(tmpCursorValue, outVarName, scope)
}
}
override fun bindToStmt(
stmtName: String,
indexVarName: String,
valueVarName: String,
scope: CodeGenScope
) {
if (intoStatementConverter == null) {
return
}
scope.builder().apply {
val tmpVar = scope.getTmpVar()
addStatement("final $T $L", columnTypeAdapter.out.typeName, tmpVar)
intoStatementConverter.convert(valueVarName, tmpVar, scope)
columnTypeAdapter.bindToStmt(stmtName, indexVarName, tmpVar, scope)
}
}
}