1 /*
2  * Copyright (C) 2016 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.solver.CodeGenScope
20 import androidx.room.solver.types.StatementValueReader
21 import androidx.room.vo.ColumnIndexVar
22 
23 /** Wraps a row adapter when there is only 1 item with 1 column in the response. */
24 class SingleColumnRowAdapter(val reader: StatementValueReader) : RowAdapter(reader.typeMirror()) {
25 
convertnull26     override fun convert(outVarName: String, stmtVarName: String, scope: CodeGenScope) {
27         reader.readFromStatement(outVarName, stmtVarName, "0", scope)
28     }
29 
getDefaultIndexAdapternull30     override fun getDefaultIndexAdapter() =
31         object : IndexAdapter {
32             override fun onStatementReady(stmtVarName: String, scope: CodeGenScope) {}
33 
34             override fun getIndexVars() = listOf(ColumnIndexVar(null, "0"))
35         }
36 }
37