| /* |
| * Copyright 2013 Google LLC |
| * |
| * 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 com.google.auto.factory.processor; |
| |
| import static com.google.auto.factory.processor.Mirrors.unwrapOptionalEquivalence; |
| import static com.google.auto.factory.processor.Mirrors.wrapOptionalInEquivalence; |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| import com.google.auto.common.AnnotationMirrors; |
| import com.google.auto.common.MoreElements; |
| import com.google.auto.common.MoreTypes; |
| import com.google.auto.value.AutoValue; |
| import com.google.common.base.Equivalence; |
| import com.google.common.base.Optional; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Iterables; |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Sets; |
| import java.util.List; |
| import java.util.Set; |
| import javax.inject.Provider; |
| import javax.lang.model.element.AnnotationMirror; |
| import javax.lang.model.element.TypeElement; |
| import javax.lang.model.element.VariableElement; |
| import javax.lang.model.type.TypeMirror; |
| import javax.lang.model.util.Types; |
| |
| /** |
| * Model for a parameter from an {@link com.google.auto.factory.AutoFactory} constructor or |
| * implementation method. |
| */ |
| @AutoValue |
| abstract class Parameter { |
| |
| /** |
| * The original type of the parameter, while {@code key().type()} erases the wrapped {@link |
| * Provider}, if any. |
| */ |
| abstract Equivalence.Wrapper<TypeMirror> type(); |
| |
| boolean isProvider() { |
| return Mirrors.isProvider(type().get()); |
| } |
| |
| boolean isPrimitive() { |
| return type().get().getKind().isPrimitive(); |
| } |
| |
| /** The name of the parameter. */ |
| abstract String name(); |
| |
| abstract Key key(); |
| abstract Optional<Equivalence.Wrapper<AnnotationMirror>> nullableWrapper(); |
| |
| Optional<AnnotationMirror> nullable() { |
| return unwrapOptionalEquivalence(nullableWrapper()); |
| } |
| |
| private static Parameter forVariableElement( |
| VariableElement variable, TypeMirror type, Types types) { |
| Optional<AnnotationMirror> nullable = Optional.absent(); |
| Iterable<? extends AnnotationMirror> annotations = |
| Iterables.concat(variable.getAnnotationMirrors(), type.getAnnotationMirrors()); |
| for (AnnotationMirror annotation : annotations) { |
| if (isNullable(annotation)) { |
| nullable = Optional.of(annotation); |
| break; |
| } |
| } |
| |
| Key key = Key.create(type, annotations, types); |
| return new AutoValue_Parameter( |
| MoreTypes.equivalence().wrap(type), |
| variable.getSimpleName().toString(), |
| key, |
| wrapOptionalInEquivalence(AnnotationMirrors.equivalence(), nullable)); |
| } |
| |
| private static boolean isNullable(AnnotationMirror annotation) { |
| TypeElement annotationType = MoreElements.asType(annotation.getAnnotationType().asElement()); |
| return annotationType.getSimpleName().contentEquals("Nullable") |
| || annotationType |
| .getQualifiedName() |
| .toString() |
| // For NullableDecl and NullableType compatibility annotations |
| .startsWith("org.checkerframework.checker.nullness.compatqual.Nullable"); |
| } |
| |
| static ImmutableSet<Parameter> forParameterList( |
| List<? extends VariableElement> variables, |
| List<? extends TypeMirror> variableTypes, |
| Types types) { |
| checkArgument(variables.size() == variableTypes.size()); |
| ImmutableSet.Builder<Parameter> builder = ImmutableSet.builder(); |
| Set<String> names = Sets.newHashSetWithExpectedSize(variables.size()); |
| for (int i = 0; i < variables.size(); i++) { |
| Parameter parameter = forVariableElement(variables.get(i), variableTypes.get(i), types); |
| checkArgument(names.add(parameter.name())); |
| builder.add(parameter); |
| } |
| ImmutableSet<Parameter> parameters = builder.build(); |
| checkArgument(variables.size() == parameters.size()); |
| return parameters; |
| } |
| |
| static ImmutableSet<Parameter> forParameterList( |
| List<? extends VariableElement> variables, Types types) { |
| List<TypeMirror> variableTypes = Lists.newArrayListWithExpectedSize(variables.size()); |
| for (VariableElement var : variables) { |
| variableTypes.add(var.asType()); |
| } |
| return forParameterList(variables, variableTypes, types); |
| } |
| } |