| /* |
| * 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.shortcut.binderprovider |
| |
| import androidx.room.ext.L |
| import androidx.room.ext.T |
| import androidx.room.ext.findTypeMirror |
| import androidx.room.ext.typeName |
| import androidx.room.processor.Context |
| import androidx.room.solver.RxType |
| import androidx.room.solver.shortcut.binder.CallableDeleteOrUpdateMethodBinder.Companion.createDeleteOrUpdateBinder |
| import androidx.room.solver.shortcut.binder.DeleteOrUpdateMethodBinder |
| import erasure |
| import isAssignableFrom |
| import javax.lang.model.type.DeclaredType |
| import javax.lang.model.type.TypeMirror |
| |
| /** |
| * Provider for Rx Callable binders. |
| */ |
| open class RxCallableDeleteOrUpdateMethodBinderProvider internal constructor( |
| val context: Context, |
| private val rxType: RxType |
| ) : DeleteOrUpdateMethodBinderProvider { |
| |
| /** |
| * [Single] and [Maybe] are generics but [Completable] is not so each implementation of this |
| * class needs to define how to extract the type argument. |
| */ |
| open fun extractTypeArg(declared: DeclaredType): TypeMirror = declared.typeArguments.first() |
| |
| override fun matches(declared: DeclaredType): Boolean = |
| declared.typeArguments.size == 1 && matchesRxType(declared) |
| |
| private fun matchesRxType(declared: DeclaredType): Boolean { |
| val erasure = declared.erasure(context.processingEnv.typeUtils) |
| return erasure.typeName() == rxType.className |
| } |
| |
| override fun provide(declared: DeclaredType): DeleteOrUpdateMethodBinder { |
| val typeArg = extractTypeArg(declared) |
| val adapter = context.typeAdapterStore.findDeleteOrUpdateAdapter(typeArg) |
| return createDeleteOrUpdateBinder(typeArg, adapter) { callableImpl, _ -> |
| addStatement("return $T.fromCallable($L)", rxType.className, callableImpl) |
| } |
| } |
| |
| companion object { |
| fun getAll(context: Context) = listOf( |
| RxCallableDeleteOrUpdateMethodBinderProvider(context, RxType.RX2_SINGLE), |
| RxCallableDeleteOrUpdateMethodBinderProvider(context, RxType.RX2_MAYBE), |
| RxCompletableDeleteOrUpdateMethodBinderProvider(context, RxType.RX2_COMPLETABLE), |
| RxCallableDeleteOrUpdateMethodBinderProvider(context, RxType.RX3_SINGLE), |
| RxCallableDeleteOrUpdateMethodBinderProvider(context, RxType.RX3_MAYBE), |
| RxCompletableDeleteOrUpdateMethodBinderProvider(context, RxType.RX3_COMPLETABLE) |
| ) |
| } |
| } |
| |
| private class RxCompletableDeleteOrUpdateMethodBinderProvider( |
| context: Context, |
| rxType: RxType |
| ) : RxCallableDeleteOrUpdateMethodBinderProvider(context, rxType) { |
| |
| private val completableTypeMirror: TypeMirror? by lazy { |
| context.processingEnv.findTypeMirror(rxType.className) |
| } |
| |
| /** |
| * Since Completable is not a generic, the supported return type should be Void. |
| * Like this, the generated Callable.call method will return Void. |
| */ |
| override fun extractTypeArg(declared: DeclaredType): TypeMirror = |
| context.COMMON_TYPES.VOID |
| |
| override fun matches(declared: DeclaredType): Boolean = isCompletable(declared) |
| |
| private fun isCompletable(declared: DeclaredType): Boolean { |
| if (completableTypeMirror == null) { |
| return false |
| } |
| val typeUtils = context.processingEnv.typeUtils |
| val erasure = declared.erasure(typeUtils) |
| return erasure.isAssignableFrom(typeUtils, completableTypeMirror!!) |
| } |
| } |