EntityUpdateAdapterWriter.kt
/*
* Copyright (C) 2017 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.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.Pojo
import androidx.room.vo.ShortcutEntity
import androidx.room.vo.columnNames
class EntityUpdateAdapterWriter private constructor(
val tableName: String,
val pojo: Pojo,
val primaryKeyFields: Fields,
val onConflict: String
) {
companion object {
fun create(entity: ShortcutEntity, onConflict: String) =
EntityUpdateAdapterWriter(
tableName = entity.tableName,
pojo = entity.pojo,
primaryKeyFields = entity.primaryKey.fields,
onConflict = onConflict
)
}
fun createAnonymous(typeWriter: TypeWriter, dbParam: String): XTypeSpec {
return XTypeSpec.anonymousClassBuilder(typeWriter.codeLanguage, "%L", dbParam).apply {
superclass(RoomTypeNames.DELETE_OR_UPDATE_ADAPTER.parametrizedBy(pojo.typeName))
addFunction(
XFunSpec.builder(
language = language,
name = "createQuery",
visibility = VisibilityModifier.PUBLIC,
isOverride = true
).apply {
returns(CommonTypeNames.STRING)
val pojoCols = pojo.columnNames.joinToString(",") {
"`$it` = ?"
}
val pkFieldsCols = primaryKeyFields.columnNames.joinToString(" AND ") {
"`$it` = ?"
}
val query = buildString {
if (onConflict.isNotEmpty()) {
append("UPDATE OR $onConflict `$tableName` SET")
} else {
append("UPDATE `$tableName` SET")
}
append(" $pojoCols")
append(" WHERE")
append(" $pkFieldsCols")
}
addStatement("return %S", query)
}.build()
)
addFunction(
XFunSpec.builder(
language = language,
name = "bind",
visibility = VisibilityModifier.PUBLIC,
isOverride = true
).apply {
val stmtParam = "statement"
addParameter(SupportDbTypeNames.SQLITE_STMT, stmtParam)
val entityParam = "entity"
addParameter(pojo.typeName, entityParam)
val mappedField = FieldWithIndex.byOrder(pojo.fields)
val bindScope = CodeGenScope(typeWriter)
FieldReadWriteWriter.bindToStatement(
ownerVar = entityParam,
stmtParamVar = stmtParam,
fieldsWithIndices = mappedField,
scope = bindScope
)
val pkeyStart = pojo.fields.size
val mappedPrimaryKeys = primaryKeyFields.mapIndexed { index, field ->
FieldWithIndex(
field = field,
indexVar = "${pkeyStart + index + 1}",
alwaysExists = true
)
}
FieldReadWriteWriter.bindToStatement(
ownerVar = entityParam,
stmtParamVar = stmtParam,
fieldsWithIndices = mappedPrimaryKeys,
scope = bindScope
)
addCode(bindScope.generate())
}.build()
)
}.build()
}
}