com.zeoflow.depot.processor.UpdateMethodProcessor.kt Maven / Gradle / Ivy

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The Depot persistence library provides an abstraction layer over SQLite to allow for more robust database access while using the full power of SQLite.

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/*
 * Copyright (C) 2021 ZeoFlow SRL
 *
 * 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 com.zeoflow.depot.processor

import com.zeoflow.depot.OnConflictStrategy.IGNORE
import com.zeoflow.depot.OnConflictStrategy.REPLACE
import com.zeoflow.depot.compiler.processing.XMethodElement
import com.zeoflow.depot.compiler.processing.XType
import com.zeoflow.depot.vo.UpdateMethod
import com.zeoflow.depot.vo.findFieldByColumnName

class UpdateMethodProcessor(
    baseContext: Context,
    val containing: XType,
    val executableElement: XMethodElement
) {
    val context = baseContext.fork(executableElement)

    fun process(): UpdateMethod {
        val delegate = ShortcutMethodProcessor(context, containing, executableElement)
        val annotation = delegate
            .extractAnnotation(com.zeoflow.depot.Update::class, ProcessorErrors.MISSING_UPDATE_ANNOTATION)

        val onConflict = annotation?.value?.onConflict ?: OnConflictProcessor.INVALID_ON_CONFLICT
        context.checker.check(
            onConflict in REPLACE..IGNORE,
            executableElement, ProcessorErrors.INVALID_ON_CONFLICT_VALUE
        )

        val (entities, params) = delegate.extractParams(
            targetEntityType = annotation?.getAsType("entity"),
            missingParamError = ProcessorErrors.UPDATE_MISSING_PARAMS,
            onValidatePartialEntity = { entity, pojo ->
                val missingPrimaryKeys = entity.primaryKey.fields.filter {
                    pojo.findFieldByColumnName(it.columnName) == null
                }
                context.checker.check(
                    missingPrimaryKeys.isEmpty(), executableElement,
                    ProcessorErrors.missingPrimaryKeysInPartialEntityForUpdate(
                        partialEntityName = pojo.typeName.toString(),
                        primaryKeyNames = missingPrimaryKeys.map { it.columnName }
                    )
                )
            }
        )

        val returnType = delegate.extractReturnType()
        val methodBinder = delegate.findDeleteOrUpdateMethodBinder(returnType)

        context.checker.check(
            methodBinder.adapter != null,
            executableElement,
            ProcessorErrors.CANNOT_FIND_UPDATE_RESULT_ADAPTER
        )

        return UpdateMethod(
            element = delegate.executableElement,
            name = delegate.executableElement.name,
            entities = entities,
            onConflictStrategy = onConflict,
            methodBinder = methodBinder,
            parameters = params
        )
    }
}