| /* |
| * 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.query.result |
| |
| import androidx.room.ext.GuavaBaseTypeNames |
| import androidx.room.ext.L |
| import androidx.room.ext.T |
| import androidx.room.solver.CodeGenScope |
| import com.squareup.javapoet.ParameterizedTypeName |
| |
| /** |
| * Wraps a row adapter when there is only 1 item in the result, and the result's outer type is |
| * {@link com.google.common.base.Optional}. |
| */ |
| class GuavaOptionalQueryResultAdapter(private val resultAdapter: SingleEntityQueryResultAdapter) : |
| QueryResultAdapter(resultAdapter.rowAdapter) { |
| val type = resultAdapter.rowAdapter?.out |
| override fun convert( |
| outVarName: String, |
| cursorVarName: String, |
| scope: CodeGenScope |
| ) { |
| scope.builder().apply { |
| val valueVarName = scope.getTmpVar("_value") |
| resultAdapter.convert(valueVarName, cursorVarName, scope) |
| addStatement( |
| "final $T $L = $T.fromNullable($L)", |
| ParameterizedTypeName.get(GuavaBaseTypeNames.OPTIONAL, type?.typeName), |
| outVarName, |
| GuavaBaseTypeNames.OPTIONAL, |
| valueVarName) |
| } |
| } |
| } |