CursorQueryResultBinder.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.solver.query.result
import androidx.room.compiler.codegen.XCodeBlock.Builder.Companion.addLocalVal
import androidx.room.compiler.codegen.XPropertySpec
import androidx.room.ext.AndroidTypeNames
import androidx.room.solver.CodeGenScope
class CursorQueryResultBinder : QueryResultBinder(NO_OP_RESULT_ADAPTER) {
override fun convertAndReturn(
roomSQLiteQueryVar: String,
canReleaseQuery: Boolean,
dbProperty: XPropertySpec,
inTransaction: Boolean,
scope: CodeGenScope
) {
val transactionWrapper = if (inTransaction) {
scope.builder.transactionWrapper(dbProperty.name)
} else {
null
}
transactionWrapper?.beginTransactionWithControlFlow()
scope.builder.apply {
val resultName = scope.getTmpVar("_tmpResult")
addLocalVal(
resultName,
AndroidTypeNames.CURSOR,
"%N.query(%L)",
dbProperty,
roomSQLiteQueryVar
)
transactionWrapper?.commitTransaction()
addStatement("return %L", resultName)
transactionWrapper?.endTransactionWithControlFlow()
}
}
companion object {
private val NO_OP_RESULT_ADAPTER = object : QueryResultAdapter(emptyList()) {
override fun convert(outVarName: String, cursorVarName: String, scope: CodeGenScope) {
}
}
}
}