EntityDeletionAdapterWriter.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.writer
import androidx.room.compiler.codegen.VisibilityModifier
import androidx.room.compiler.codegen.XFunSpec
import androidx.room.compiler.codegen.XFunSpec.Builder.Companion.addStatement
import androidx.room.compiler.codegen.XTypeName
import androidx.room.compiler.codegen.XTypeSpec
import androidx.room.ext.CommonTypeNames
import androidx.room.ext.RoomTypeNames
import androidx.room.ext.SupportDbTypeNames
import androidx.room.solver.CodeGenScope
import androidx.room.vo.FieldWithIndex
import androidx.room.vo.Fields
import androidx.room.vo.ShortcutEntity
class EntityDeletionAdapterWriter private constructor(
val tableName: String,
val pojoTypeName: XTypeName,
val fields: Fields
) {
companion object {
fun create(entity: ShortcutEntity): EntityDeletionAdapterWriter {
val fieldsToUse = if (entity.isPartialEntity) {
// When using partial entity, delete by values in pojo
entity.pojo.fields
} else {
// When using entity, delete by primary key
entity.primaryKey.fields
}
return EntityDeletionAdapterWriter(
tableName = entity.tableName,
pojoTypeName = entity.pojo.typeName,
fields = fieldsToUse
)
}
}
fun createAnonymous(typeWriter: TypeWriter, dbParam: String): XTypeSpec {
return XTypeSpec.anonymousClassBuilder(
typeWriter.codeLanguage, "%L", dbParam
).apply {
superclass(RoomTypeNames.DELETE_OR_UPDATE_ADAPTER.parametrizedBy(pojoTypeName))
addFunction(
XFunSpec.builder(
language = language,
name = "createQuery",
visibility = VisibilityModifier.PUBLIC,
isOverride = true
).apply {
returns(CommonTypeNames.STRING)
val query = "DELETE FROM `$tableName` WHERE " +
fields.columnNames.joinToString(" AND ") { "`$it` = ?" }
addStatement("return %S", query)
}.build()
)
addFunction(
XFunSpec.builder(
language = language,
name = "bind",
visibility = VisibilityModifier.PUBLIC,
isOverride = true
).apply {
val stmtParam = "statement"
addParameter(SupportDbTypeNames.SQLITE_STMT, stmtParam)
val entityParam = "entity"
addParameter(pojoTypeName, entityParam)
val mapped = FieldWithIndex.byOrder(fields)
val bindScope = CodeGenScope(typeWriter)
FieldReadWriteWriter.bindToStatement(
ownerVar = entityParam,
stmtParamVar = stmtParam,
fieldsWithIndices = mapped,
scope = bindScope
)
addCode(bindScope.generate())
}.build()
)
}.build()
}
}