InstantPreparedQueryResultBinder.kt
/*
* Copyright 2018 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.prepared.binder
import androidx.room.compiler.codegen.CodeLanguage
import androidx.room.compiler.codegen.XCodeBlock
import androidx.room.compiler.codegen.XCodeBlock.Builder.Companion.addLocalVal
import androidx.room.compiler.codegen.XMemberName.Companion.packageMember
import androidx.room.compiler.codegen.XPropertySpec
import androidx.room.compiler.codegen.XTypeName
import androidx.room.compiler.codegen.box
import androidx.room.ext.InvokeWithLambdaParameter
import androidx.room.ext.LambdaSpec
import androidx.room.ext.RoomTypeNames
import androidx.room.ext.SQLiteDriverTypeNames
import androidx.room.solver.CodeGenScope
import androidx.room.solver.prepared.result.PreparedQueryResultAdapter
/**
* Default binder for prepared queries.
*/
class InstantPreparedQueryResultBinder(
adapter: PreparedQueryResultAdapter?
) : PreparedQueryResultBinder(adapter) {
override fun executeAndReturn(
prepareQueryStmtBlock: CodeGenScope.() -> String,
preparedStmtProperty: XPropertySpec?,
dbProperty: XPropertySpec,
scope: CodeGenScope
) {
scope.builder.apply {
addStatement("%N.assertNotSuspendingTransaction()", dbProperty)
}
adapter?.executeAndReturn(
stmtQueryVal = scope.prepareQueryStmtBlock(),
preparedStmtProperty = preparedStmtProperty,
dbProperty = dbProperty,
scope = scope
)
}
override fun isMigratedToDriver(): Boolean = true
override fun executeAndReturn(
sqlQueryVar: String,
dbProperty: XPropertySpec,
bindStatement: CodeGenScope.(String) -> Unit,
returnTypeName: XTypeName,
scope: CodeGenScope
) {
val connectionVar = scope.getTmpVar("_connection")
val performBlock = InvokeWithLambdaParameter(
scope = scope,
functionName = RoomTypeNames.DB_UTIL.packageMember("performBlocking"),
argFormat = listOf("%N", "%L", "%L"),
args = listOf(dbProperty, /* isReadOnly = */ false, /* inTransaction = */ true),
lambdaSpec = object : LambdaSpec(
parameterTypeName = SQLiteDriverTypeNames.CONNECTION,
parameterName = connectionVar,
returnTypeName = returnTypeName.box(),
javaLambdaSyntaxAvailable = scope.javaLambdaSyntaxAvailable
) {
override fun XCodeBlock.Builder.body(scope: CodeGenScope) {
val statementVar = scope.getTmpVar("_stmt")
addLocalVal(
statementVar,
SQLiteDriverTypeNames.STATEMENT,
"%L.prepare(%L)",
connectionVar,
sqlQueryVar
)
beginControlFlow("try")
bindStatement(scope, statementVar)
adapter?.executeAndReturn(connectionVar, statementVar, scope)
nextControlFlow("finally")
addStatement("%L.close()", statementVar)
endControlFlow()
}
}
)
val returnPrefix = when (scope.language) {
CodeLanguage.JAVA -> if (returnTypeName == XTypeName.UNIT_VOID) "" else "return "
CodeLanguage.KOTLIN -> "return "
}
scope.builder.add("$returnPrefix%L", performBlock)
}
}