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
17package android.arch.persistence.room.solver.types
18
19import android.arch.persistence.room.ext.L
20import android.arch.persistence.room.ext.T
21import android.arch.persistence.room.solver.CodeGenScope
22import javax.lang.model.type.TypeMirror
23
24/**
25 * A column adapter that uses a type converter to do the conversion. The type converter may be
26 * a composite one.
27 */
28class CompositeAdapter(out: TypeMirror, val columnTypeAdapter: ColumnTypeAdapter,
29                       val intoStatementConverter: TypeConverter?,
30                       val fromCursorConverter: TypeConverter?)
31    : ColumnTypeAdapter(out, columnTypeAdapter.typeAffinity) {
32    override fun readFromCursor(outVarName: String, cursorVarName: String, indexVarName: String,
33                                scope: CodeGenScope) {
34        if (fromCursorConverter == null) {
35            return
36        }
37        scope.builder().apply {
38            val tmpCursorValue = scope.getTmpVar()
39            addStatement("final $T $L", columnTypeAdapter.outTypeName, tmpCursorValue)
40            columnTypeAdapter.readFromCursor(tmpCursorValue, cursorVarName, indexVarName, scope)
41            fromCursorConverter.convert(tmpCursorValue, outVarName, scope)
42        }
43    }
44
45    override fun bindToStmt(stmtName: String, indexVarName: String, valueVarName: String,
46                            scope: CodeGenScope) {
47        if (intoStatementConverter == null) {
48            return
49        }
50        scope.builder().apply {
51            val tmpVar = scope.getTmpVar()
52            addStatement("final $T $L", columnTypeAdapter.out, tmpVar)
53            intoStatementConverter.convert(valueVarName, tmpVar, scope)
54            columnTypeAdapter.bindToStmt(stmtName, indexVarName, tmpVar, scope)
55        }
56    }
57}
58