1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package androidx.room.solver.query.result
18 
19 import androidx.room.ext.AndroidTypeNames
20 import androidx.room.ext.L
21 import androidx.room.ext.N
22 import androidx.room.ext.T
23 import androidx.room.solver.CodeGenScope
24 import com.squareup.javapoet.FieldSpec
25 
26 class CursorQueryResultBinder : QueryResultBinder(NO_OP_RESULT_ADAPTER) {
convertAndReturnnull27     override fun convertAndReturn(roomSQLiteQueryVar: String,
28                                   canReleaseQuery: Boolean,
29                                   dbField: FieldSpec,
30                                   inTransaction: Boolean,
31                                   scope: CodeGenScope) {
32         val builder = scope.builder()
33         val transactionWrapper = if (inTransaction) {
34             builder.transactionWrapper(dbField)
35         } else {
36             null
37         }
38         transactionWrapper?.beginTransactionWithControlFlow()
39         val resultName = scope.getTmpVar("_tmpResult")
40         builder.addStatement("final $T $L = $N.query($L)", AndroidTypeNames.CURSOR, resultName,
41                 dbField, roomSQLiteQueryVar)
42         transactionWrapper?.commitTransaction()
43         builder.addStatement("return $L", resultName)
44         transactionWrapper?.endTransactionWithControlFlow()
45     }
46 
47     companion object {
48         private val NO_OP_RESULT_ADAPTER = object : QueryResultAdapter(null) {
convertnull49             override fun convert(outVarName: String, cursorVarName: String, scope: CodeGenScope) {
50             }
51         }
52     }
53 }
54