| /* |
| * Copyright (C) 2014 The Dagger Authors. |
| * |
| * 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 dagger.internal.codegen.binding; |
| |
| import static com.google.common.base.CaseFormat.LOWER_CAMEL; |
| import static com.google.common.base.CaseFormat.UPPER_CAMEL; |
| import static dagger.internal.codegen.binding.SourceFiles.protectAgainstKeywords; |
| |
| import com.google.auto.common.MoreTypes; |
| import com.google.common.collect.ImmutableSet; |
| import dagger.model.DependencyRequest; |
| import dagger.model.Key; |
| import java.util.Iterator; |
| import javax.lang.model.element.TypeElement; |
| import javax.lang.model.type.ArrayType; |
| import javax.lang.model.type.DeclaredType; |
| import javax.lang.model.type.PrimitiveType; |
| import javax.lang.model.type.TypeMirror; |
| import javax.lang.model.type.TypeVisitor; |
| import javax.lang.model.util.SimpleTypeVisitor8; |
| |
| /** |
| * Suggests a variable name for a type based on a {@link Key}. Prefer {@link |
| * DependencyVariableNamer} for cases where a specific {@link DependencyRequest} is present. |
| */ |
| public final class KeyVariableNamer { |
| /** Simple names that are very common. Inspired by https://errorprone.info/bugpattern/BadImport */ |
| private static final ImmutableSet<String> VERY_SIMPLE_NAMES = |
| ImmutableSet.of( |
| "Builder", |
| "Factory", |
| "Component", |
| "Subcomponent", |
| "Injector"); |
| |
| private static final TypeVisitor<Void, StringBuilder> TYPE_NAMER = |
| new SimpleTypeVisitor8<Void, StringBuilder>() { |
| @Override |
| public Void visitDeclared(DeclaredType declaredType, StringBuilder builder) { |
| TypeElement element = MoreTypes.asTypeElement(declaredType); |
| if (element.getNestingKind().isNested() |
| && VERY_SIMPLE_NAMES.contains(element.getSimpleName().toString())) { |
| builder.append(element.getEnclosingElement().getSimpleName()); |
| } |
| |
| builder.append(element.getSimpleName()); |
| Iterator<? extends TypeMirror> argumentIterator = |
| declaredType.getTypeArguments().iterator(); |
| if (argumentIterator.hasNext()) { |
| builder.append("Of"); |
| TypeMirror first = argumentIterator.next(); |
| first.accept(this, builder); |
| while (argumentIterator.hasNext()) { |
| builder.append("And"); |
| argumentIterator.next().accept(this, builder); |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| public Void visitPrimitive(PrimitiveType type, StringBuilder builder) { |
| builder.append(LOWER_CAMEL.to(UPPER_CAMEL, type.toString())); |
| return null; |
| } |
| |
| @Override |
| public Void visitArray(ArrayType type, StringBuilder builder) { |
| type.getComponentType().accept(this, builder); |
| builder.append("Array"); |
| return null; |
| } |
| }; |
| |
| private KeyVariableNamer() {} |
| |
| public static String name(Key key) { |
| if (key.multibindingContributionIdentifier().isPresent()) { |
| return key.multibindingContributionIdentifier().get().bindingElement(); |
| } |
| |
| StringBuilder builder = new StringBuilder(); |
| |
| if (key.qualifier().isPresent()) { |
| // TODO(gak): Use a better name for fields with qualifiers with members. |
| builder.append(key.qualifier().get().getAnnotationType().asElement().getSimpleName()); |
| } |
| |
| key.type().accept(TYPE_NAMER, builder); |
| |
| return protectAgainstKeywords(UPPER_CAMEL.to(LOWER_CAMEL, builder.toString())); |
| } |
| } |