CallableUpsertMethodBinder.kt

/*
 * Copyright 2022 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.shortcut.binder

import androidx.room.compiler.codegen.XCodeBlock
import androidx.room.compiler.codegen.XPropertySpec
import androidx.room.compiler.codegen.XTypeSpec
import androidx.room.compiler.processing.XType
import androidx.room.ext.CallableTypeSpecBuilder
import androidx.room.solver.CodeGenScope
import androidx.room.solver.shortcut.result.InsertOrUpsertMethodAdapter
import androidx.room.vo.ShortcutQueryParameter

/**
 * Binder for deferred upsert methods.
 *
 * This binder will create a Callable implementation that delegates to the
 * [InsertOrUpsertMethodAdapter]. Usage of the Callable impl is then delegate to the [addStmntBlock]
 * function.
 */
class CallableUpsertMethodBinder(
    val typeArg: XType,
    val addStmntBlock: XCodeBlock.Builder.(
        callableImpl: XTypeSpec,
        dbProperty: XPropertySpec
    ) -> Unit,
    adapter: InsertOrUpsertMethodAdapter?
) : InsertOrUpsertMethodBinder(adapter) {

    companion object {
        fun createUpsertBinder(
            typeArg: XType,
            adapter: InsertOrUpsertMethodAdapter?,
            addCodeBlock: XCodeBlock.Builder.(
                callableImpl: XTypeSpec,
                dbField: XPropertySpec
            ) -> Unit
        ) = CallableUpsertMethodBinder(typeArg, addCodeBlock, adapter)
    }

    override fun convertAndReturn(
        parameters: List<ShortcutQueryParameter>,
        adapters: Map<String, Pair<XPropertySpec, Any>>,
        dbProperty: XPropertySpec,
        scope: CodeGenScope
    ) {
        val adapterScope = scope.fork()
        val callableImpl = CallableTypeSpecBuilder(scope.language, typeArg.asTypeName()) {
            addCode(
                XCodeBlock.builder(language).apply {
                    adapter?.createMethodBody(
                        parameters = parameters,
                        adapters = adapters,
                        dbProperty = dbProperty,
                        scope = adapterScope
                    )
                    addCode(adapterScope.generate())
                }.build()
            )
        }.build()

        scope.builder.apply {
            addStmntBlock(callableImpl, dbProperty)
        }
    }
}