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.parameter
18 
19 import androidx.room.ext.L
20 import androidx.room.ext.T
21 import androidx.room.ext.typeName
22 import androidx.room.solver.CodeGenScope
23 import androidx.room.solver.types.StatementValueBinder
24 import com.squareup.javapoet.TypeName
25 
26 /**
27  * Binds Collection<T> (e.g. List<T>) into String[] query args.
28  */
29 class CollectionQueryParameterAdapter(val bindAdapter: StatementValueBinder)
30             : QueryParameterAdapter(true) {
bindToStmtnull31     override fun bindToStmt(inputVarName: String, stmtVarName: String, startIndexVarName: String,
32                             scope: CodeGenScope) {
33         scope.builder().apply {
34             val itrVar = scope.getTmpVar("_item")
35             beginControlFlow("for ($T $L : $L)", bindAdapter.typeMirror().typeName(), itrVar,
36                     inputVarName).apply {
37                         bindAdapter.bindToStmt(stmtVarName, startIndexVarName, itrVar, scope)
38                         addStatement("$L ++", startIndexVarName)
39                     }
40             endControlFlow()
41         }
42     }
43 
getArgCountnull44     override fun getArgCount(inputVarName: String, outputVarName: String, scope: CodeGenScope) {
45         scope.builder()
46                 .addStatement("final $T $L = $L.size()", TypeName.INT, outputVarName, inputVarName)
47     }
48 }
49