108 lines
3.9 KiB
Java
108 lines
3.9 KiB
Java
/*
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* Copyright (C) 2014 The Dagger Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dagger.internal.codegen.binding;
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import static com.google.common.base.CaseFormat.LOWER_CAMEL;
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import static com.google.common.base.CaseFormat.UPPER_CAMEL;
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import static dagger.internal.codegen.binding.SourceFiles.protectAgainstKeywords;
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import com.google.auto.common.MoreTypes;
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import com.google.common.collect.ImmutableSet;
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import dagger.model.DependencyRequest;
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import dagger.model.Key;
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import java.util.Iterator;
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import javax.lang.model.element.TypeElement;
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import javax.lang.model.type.ArrayType;
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import javax.lang.model.type.DeclaredType;
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import javax.lang.model.type.PrimitiveType;
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import javax.lang.model.type.TypeMirror;
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import javax.lang.model.type.TypeVisitor;
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import javax.lang.model.util.SimpleTypeVisitor8;
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/**
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* Suggests a variable name for a type based on a {@link Key}. Prefer {@link
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* DependencyVariableNamer} for cases where a specific {@link DependencyRequest} is present.
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*/
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public final class KeyVariableNamer {
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/** Simple names that are very common. Inspired by https://errorprone.info/bugpattern/BadImport */
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private static final ImmutableSet<String> VERY_SIMPLE_NAMES =
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ImmutableSet.of(
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"Builder",
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"Factory",
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"Component",
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"Subcomponent",
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"Injector");
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private static final TypeVisitor<Void, StringBuilder> TYPE_NAMER =
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new SimpleTypeVisitor8<Void, StringBuilder>() {
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@Override
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public Void visitDeclared(DeclaredType declaredType, StringBuilder builder) {
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TypeElement element = MoreTypes.asTypeElement(declaredType);
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if (element.getNestingKind().isNested()
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&& VERY_SIMPLE_NAMES.contains(element.getSimpleName().toString())) {
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builder.append(element.getEnclosingElement().getSimpleName());
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}
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builder.append(element.getSimpleName());
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Iterator<? extends TypeMirror> argumentIterator =
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declaredType.getTypeArguments().iterator();
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if (argumentIterator.hasNext()) {
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builder.append("Of");
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TypeMirror first = argumentIterator.next();
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first.accept(this, builder);
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while (argumentIterator.hasNext()) {
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builder.append("And");
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argumentIterator.next().accept(this, builder);
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}
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}
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return null;
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}
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@Override
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public Void visitPrimitive(PrimitiveType type, StringBuilder builder) {
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builder.append(LOWER_CAMEL.to(UPPER_CAMEL, type.toString()));
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return null;
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}
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@Override
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public Void visitArray(ArrayType type, StringBuilder builder) {
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type.getComponentType().accept(this, builder);
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builder.append("Array");
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return null;
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}
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};
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private KeyVariableNamer() {}
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public static String name(Key key) {
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if (key.multibindingContributionIdentifier().isPresent()) {
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return key.multibindingContributionIdentifier().get().bindingElement();
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}
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StringBuilder builder = new StringBuilder();
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if (key.qualifier().isPresent()) {
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// TODO(gak): Use a better name for fields with qualifiers with members.
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builder.append(key.qualifier().get().getAnnotationType().asElement().getSimpleName());
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}
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key.type().accept(TYPE_NAMER, builder);
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return protectAgainstKeywords(UPPER_CAMEL.to(LOWER_CAMEL, builder.toString()));
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}
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}
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