com.zeoflow.depot.writer.TableInfoValidationWriter.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.writer

import com.zeoflow.depot.ext.CommonTypeNames
import com.zeoflow.depot.ext.L
import com.zeoflow.depot.ext.N
import com.zeoflow.depot.ext.DepotTypeNames
import com.zeoflow.depot.ext.S
import com.zeoflow.depot.ext.T
import com.zeoflow.depot.ext.typeName
import com.zeoflow.depot.parser.SQLTypeAffinity
import com.zeoflow.depot.vo.Entity
import com.zeoflow.depot.vo.columnNames
import com.squareup.javapoet.ParameterSpec
import com.squareup.javapoet.ParameterizedTypeName
import stripNonJava
import java.util.Arrays
import java.util.HashMap
import java.util.HashSet
import java.util.Locale

class TableInfoValidationWriter(val entity: Entity) : ValidationWriter() {

    companion object {
        const val CREATED_FROM_ENTITY = "CREATED_FROM_ENTITY"
    }

    override fun write(dbParam: ParameterSpec, scope: CountingCodeGenScope) {
        val suffix = entity.tableName.stripNonJava().capitalize(Locale.US)
        val expectedInfoVar = scope.getTmpVar("_info$suffix")
        scope.builder().apply {
            val columnListVar = scope.getTmpVar("_columns$suffix")
            val columnListType = ParameterizedTypeName.get(
                HashMap::class.typeName,
                CommonTypeNames.STRING, DepotTypeNames.TABLE_INFO_COLUMN
            )

            addStatement(
                "final $T $L = new $T($L)", columnListType, columnListVar,
                columnListType, entity.fields.size
            )
            entity.fields.forEach { field ->
                addStatement(
                    "$L.put($S, new $T($S, $S, $L, $L, $S, $T.$L))",
                    columnListVar, field.columnName, DepotTypeNames.TABLE_INFO_COLUMN,
                    /*name*/ field.columnName,
                    /*type*/ field.affinity?.name ?: SQLTypeAffinity.TEXT.name,
                    /*nonNull*/ field.nonNull,
                    /*pkeyPos*/ entity.primaryKey.fields.indexOf(field) + 1,
                    /*defaultValue*/ field.defaultValue,
                    /*createdFrom*/ DepotTypeNames.TABLE_INFO, CREATED_FROM_ENTITY
                )
            }

            val foreignKeySetVar = scope.getTmpVar("_foreignKeys$suffix")
            val foreignKeySetType = ParameterizedTypeName.get(
                HashSet::class.typeName,
                DepotTypeNames.TABLE_INFO_FOREIGN_KEY
            )
            addStatement(
                "final $T $L = new $T($L)", foreignKeySetType, foreignKeySetVar,
                foreignKeySetType, entity.foreignKeys.size
            )
            entity.foreignKeys.forEach {
                val myColumnNames = it.childFields
                    .joinToString(",") { "\"${it.columnName}\"" }
                val refColumnNames = it.parentColumns
                    .joinToString(",") { "\"$it\"" }
                addStatement(
                    "$L.add(new $T($S, $S, $S," +
                        "$T.asList($L), $T.asList($L)))",
                    foreignKeySetVar,
                    DepotTypeNames.TABLE_INFO_FOREIGN_KEY,
                    /*parent table*/ it.parentTable,
                    /*on delete*/ it.onDelete.sqlName,
                    /*on update*/ it.onUpdate.sqlName,
                    Arrays::class.typeName,
                    /*parent names*/ myColumnNames,
                    Arrays::class.typeName,
                    /*parent column names*/ refColumnNames
                )
            }

            val indicesSetVar = scope.getTmpVar("_indices$suffix")
            val indicesType = ParameterizedTypeName.get(
                HashSet::class.typeName,
                DepotTypeNames.TABLE_INFO_INDEX
            )
            addStatement(
                "final $T $L = new $T($L)", indicesType, indicesSetVar,
                indicesType, entity.indices.size
            )
            entity.indices.forEach { index ->
                val columnNames = index.columnNames.joinToString(",") { "\"$it\"" }
                addStatement(
                    "$L.add(new $T($S, $L, $T.asList($L)))",
                    indicesSetVar,
                    DepotTypeNames.TABLE_INFO_INDEX,
                    index.name,
                    index.unique,
                    Arrays::class.typeName,
                    columnNames
                )
            }

            addStatement(
                "final $T $L = new $T($S, $L, $L, $L)",
                DepotTypeNames.TABLE_INFO, expectedInfoVar, DepotTypeNames.TABLE_INFO,
                entity.tableName, columnListVar, foreignKeySetVar, indicesSetVar
            )

            val existingVar = scope.getTmpVar("_existing$suffix")
            addStatement(
                "final $T $L = $T.read($N, $S)",
                DepotTypeNames.TABLE_INFO, existingVar, DepotTypeNames.TABLE_INFO,
                dbParam, entity.tableName
            )

            beginControlFlow("if (! $L.equals($L))", expectedInfoVar, existingVar).apply {
                addStatement(
                    "return new $T(false, $S + $L + $S + $L)",
                    DepotTypeNames.OPEN_HELPER_VALIDATION_RESULT,
                    "${entity.tableName}(${entity.element.qualifiedName}).\n Expected:\n",
                    expectedInfoVar, "\n Found:\n", existingVar
                )
            }
            endControlFlow()
        }
    }
}