java类javax.lang.model.element.TypeParameterElement的实例源码

/**
 * The type parameters to place on the builder, with the "extends ..." bounds.
 */
String alligatorWithBounds() {
  List<TypeParameterElement> allParameters = allParameters();
  if (allParameters.isEmpty()) {
    return "";
  }

  StringBuilder alligator = new StringBuilder("<");
  String separator = "";
  for (TypeParameterElement param : allParameters) {
    alligator.append(separator);
    separator = ", ";
    alligator.append(param.toString());
    for (TypeMirror bound : param.getBounds()) {
      alligator.append(" extends ").append(bound);
    }
  }
  return alligator.append(">").toString();
}

private Map<TypeParameterElement, TypeMirror> getChildInstanceOfClassFromGeneric(final TypeElement typeElement, final Class<?> aClass) {
    Map<TypeParameterElement, TypeMirror> result = new HashMap<>();
    for (TypeParameterElement element : typeElement.getTypeParameters()) {
        List<? extends TypeMirror> bounds = element.getBounds();
        for (TypeMirror bound : bounds) {
            if (bound instanceof DeclaredType && ((DeclaredType) bound).asElement() instanceof TypeElement) {
                Collection<TypeMirror> viewsType = getViewsType((TypeElement) ((DeclaredType) bound).asElement());
                boolean isViewType = false;
                for (TypeMirror viewType : viewsType) {
                    if (((DeclaredType) viewType).asElement().toString().equals(aClass.getCanonicalName())) {
                        isViewType = true;
                    }
                }

                if (isViewType) {
                    result.put(element, bound);
                    break;
                }
            }
        }
    }

    return result;
}

TypevarContext(TypeElement element, String renderedTypeString) {
  List<? extends TypeParameterElement> typeParameters = element.getTypeParameters();
  if (!typeParameters.isEmpty()) {
    this.arguments = SourceTypes.extract(renderedTypeString).getValue();

    this.parameters = Lists.newArrayList();
    for (TypeParameterElement p : typeParameters) {
      parameters.add(p.getSimpleName().toString());
    }
    // we allow having no arguments in a string as raw type/unspecified argument scenario
    Verify.verify(arguments.isEmpty() || (parameters.size() == arguments.size()), parameters + " =/> " + arguments);
  } else {
    this.parameters = Collections.emptyList();
    this.arguments = Collections.emptyList();
  }
}

private TypeExtractor processTypeParameters(ExecutableElement method, EncodedElement.Builder builder) {
  boolean isStatic = method.getModifiers().contains(Modifier.STATIC);

  TypeExtractor typesReader = isStatic
      ? new TypeExtractor(types, method)
      : this.typesReader;

  for (TypeParameterElement p : method.getTypeParameters()) {
    String name = p.getSimpleName().toString();
    ImmutableList<Defined> bounds = typesReader.getDefined(p.getBounds());
    if (!isStatic) {
      typesReader = typesReader.withParameter(name, bounds);
    }
    builder.addTypeParams(new EncodedElement.TypeParam.Builder()
        .name(name)
        .addAllBounds(bounds)
        .build());
  }

  builder.typeParameters(typesReader.parameters);

  return typesReader;
}

/**
 * Makes a list of trees representing the given type parameter elements.
 */
private static List<TypeParameterTree> makeTypeParamsCopy(
                            List<? extends TypeParameterElement> typeParams,
                            TreeMaker maker) {
    if (typeParams.isEmpty()) {
        return Collections.emptyList();
    }

    int size = typeParams.size();
    if (size == 1) {
        return Collections.singletonList(makeCopy(typeParams.get(0), maker));
    }

    List<TypeParameterTree> result = new ArrayList(size);
    for (TypeParameterElement typeParam : typeParams) {
        result.add(makeCopy(typeParam, maker));
    }
    return result;
}

/**
 * Makes a list of trees representing the given type parameter elements.
 */
private static List<TypeParameterTree> makeTypeParamsCopy(
                            List<? extends TypeParameterElement> typeParams,
                            TreeMaker maker) {
    if (typeParams.isEmpty()) {
        return Collections.emptyList();
    }

    int size = typeParams.size();
    if (size == 1) {
        return Collections.singletonList(makeCopy(typeParams.get(0), maker));
    }

    List<TypeParameterTree> result = new ArrayList(size);
    for (TypeParameterElement typeParam : typeParams) {
        result.add(makeCopy(typeParam, maker));
    }
    return result;
}

@Override
void initialize(final Element element, CompilationController info) {
    final String labelText;
    if(element.getKind() == ElementKind.TYPE_PARAMETER) {
        labelText = UIUtilities.createHeader((TypeParameterElement) element, info.getElements().isDeprecated(element), false, false, true);
    } else {
        labelText = UIUtilities.createHeader((VariableElement) element, info.getElements().isDeprecated(element), false, false, true);
    }
    final Icon labelIcon = ElementIcons.getElementIcon(element.getKind(), element.getModifiers());
    SwingUtilities.invokeLater(new Runnable() {

        @Override
        public void run() {
            Dimension preferredSize = label.getPreferredSize();
            label.setText(labelText);
            label.setIcon(labelIcon);
            label.setPreferredSize(preferredSize);
            label.setMinimumSize(preferredSize);
        }
    });
}

private boolean deepSearchTypes(DeclaredType currentElement, TypeMirror orig, TypeMirror something, Map<TypeMirror, TypeParameterElement> mappings) {
    Types types = workingCopy.getTypes();
    List<? extends TypeMirror> directSupertypes = types.directSupertypes(currentElement);
    for (TypeMirror superType : directSupertypes) {
        DeclaredType type = (DeclaredType) superType;
        List<? extends TypeMirror> typeArguments = type.getTypeArguments();
        for (int i = 0; i < typeArguments.size(); i++) {
            TypeMirror typeArgument = typeArguments.get(i);
            if (something.equals(typeArgument)) {
                TypeElement asElement = (TypeElement) type.asElement();
                mappings.put(orig, asElement.getTypeParameters().get(i));
                if (types.erasure(targetType.asType()).equals(types.erasure(superType))) {
                    return true;
                }
                if(deepSearchTypes(type, orig, typeArgument, mappings)) {
                    break;
                }
            }
        }
        if (types.erasure(targetType.asType()).equals(types.erasure(superType))) {
            mappings.remove(orig);
            return true;
        }
    }
    return false;
}

public Boolean visitType(TypeElement arg0, Void arg1) {
    for (TypeParameterElement e : arg0.getTypeParameters()) {
        if (stop) {
            return false;
        }

        for (TypeMirror b : e.getBounds()) {
            if (stop) {
                return false;
            }

            if (b.accept(this, arg1)) {
                return true;
            }
        }
    }

    TypeMirror superclass = arg0.getSuperclass();
    if (superclass.getKind() == TypeKind.DECLARED) {
        if (!((DeclaredType) superclass).asElement().getKind().isInterface()) {
            return false;
        }
    }

    return superclass.accept(this, arg1);
}

private void completeTypeVarName(Element forElement, String prefix, int substitutionOffset) {
    if (prefix.length() > 0) {
        if (prefix.charAt(0) == '<') {
            prefix = prefix.substring(1, prefix.length());
        } else {
            // not type param
            return;
        }
    }
    List<? extends TypeParameterElement> tparams = (forElement.getKind().isClass() || forElement.getKind().isInterface())
         ? ((TypeElement) forElement).getTypeParameters()
         : ((ExecutableElement) forElement).getTypeParameters();

    for (TypeParameterElement typeVariable : tparams) {
        String name = typeVariable.getSimpleName().toString();
        if (name.startsWith(prefix)) {
            items.add(JavadocCompletionItem.createNameItem(
                    '<' + name + '>', substitutionOffset));
        }
    }
}

private void dumpTypeArguments(List<? extends TypeParameterElement> list) {
    if (list.isEmpty()) {
        return ;
    }

    boolean addSpace = false;

    result.append("&lt;");

    for (TypeParameterElement e : list) {
        if (addSpace) {
            result.append(", ");
        }

        result.append(getTypeName(info, e.asType(), true));

        addSpace = true;
    }

    result.append("&gt;");
}

public String generateComment(TypeElement clazz, CompilationInfo javac) {
        StringBuilder builder = new StringBuilder(
//                "/**\n" + // NOI18N
                "\n" // NOI18N
                );

        if (clazz.getNestingKind() == NestingKind.TOP_LEVEL) {
            builder.append("@author ").append(author).append("\n"); // NOI18N
        }

        if (SourceVersion.RELEASE_5.compareTo(srcVersion) <= 0) {
            for (TypeParameterElement param : clazz.getTypeParameters()) {
                builder.append("@param <").append(param.getSimpleName().toString()).append("> \n"); // NOI18N
            }
        }

        if (SourceVersion.RELEASE_5.compareTo(srcVersion) <= 0 &&
                JavadocUtilities.isDeprecated(javac, clazz)) {
            builder.append("@deprecated\n"); // NOI18N
        }

//        builder.append("*/\n"); // NOI18N

        return builder.toString();
    }

public static Spec parse(Element element, ProcessingEnvironment processingEnv) {
  Messager messager = processingEnv.getMessager();

  if (element.getKind() != ElementKind.INTERFACE) {
    messager.printMessage(
        Diagnostic.Kind.ERROR, "@DataEnum can only be used on interfaces.", element);
    return null;
  }

  TypeElement dataEnum = (TypeElement) element;

  List<TypeVariableName> typeVariableNames = new ArrayList<>();
  for (TypeParameterElement typeParameterElement : dataEnum.getTypeParameters()) {
    typeVariableNames.add(TypeVariableName.get(typeParameterElement));
  }

  List<Value> values = ValuesParser.parse(dataEnum, processingEnv);
  if (values == null) {
    return null;
  }

  ClassName enumInterface = ClassName.get(dataEnum);
  return new Spec(enumInterface, typeVariableNames, values);
}

private void printFormalTypeParameters(Parameterizable e,
                                       boolean pad) {
    List<? extends TypeParameterElement> typeParams = e.getTypeParameters();
    if (typeParams.size() > 0) {
        writer.print("<");

        boolean first = true;
        for(TypeParameterElement tpe: typeParams) {
            if (!first)
                writer.print(", ");
            printAnnotationsInline(tpe);
            writer.print(tpe.toString());
            first = false;
        }

        writer.print(">");
        if (pad)
            writer.print(" ");
    }
}

void writeType(TypeElement e) {
    if (!acceptType.test(task.getElements().getBinaryName(e).toString()))
        return ;
    try {
        analyzeElement(e);
        writeTypes(e.getInterfaces());
        out.write(e.getNestingKind().toString());
        out.write(e.getQualifiedName().toString());
        write(e.getSuperclass());
        for (TypeParameterElement param : e.getTypeParameters()) {
            visit(param, null);
        }
        List<Element> defs = new ArrayList<>(e.getEnclosedElements()); //XXX: forcing ordering for members - not completely correct!
        Collections.sort(defs, (e1, e2) -> e1.toString().compareTo(e2.toString()));
        for (Element def : defs) {
            visit(def, null);
        }
        out.write("\n");
    } catch (IOException ex) {
        ex.printStackTrace();
    }
}

@Override
public Boolean visitTypeVariable(TypeVariable a, EqualVisitorParam p) {
    if (p.type.getKind().equals(TYPEVAR)) {
        TypeVariable b = (TypeVariable) p.type;
        TypeParameterElement aElement = (TypeParameterElement) a.asElement();
        TypeParameterElement bElement = (TypeParameterElement) b.asElement();
        Set<ComparedElements> newVisiting = visitingSetPlus(p.visiting, aElement, bElement);
        if (newVisiting.equals(p.visiting)) {
            // We're already visiting this pair of elements.
            // This can happen with our friend Eclipse when looking at <T extends Comparable<T>>.
            // It incorrectly reports the upper bound of T as T itself.
            return true;
        }
        // We use aElement.getBounds() instead of a.getUpperBound() to avoid having to deal with
        // the different way intersection types (like <T extends Number & Comparable<T>>) are
        // represented before and after Java 8. We do have an issue that this code may consider
        // that <T extends Foo & Bar> is different from <T extends Bar & Foo>, but it's very
        // hard to avoid that, and not likely to be much of a problem in practice.
        return equalLists(aElement.getBounds(), bElement.getBounds(), newVisiting)
                && equal(a.getLowerBound(), b.getLowerBound(), newVisiting)
                && a.asElement().getSimpleName().equals(b.asElement().getSimpleName());
    }
    return false;
}

void writeType(TypeElement e) {
    if (!acceptType.test(task.getElements().getBinaryName(e).toString()))
        return ;
    try {
        analyzeElement(e);
        writeTypes(e.getInterfaces());
        out.write(e.getNestingKind().toString());
        out.write(e.getQualifiedName().toString());
        write(e.getSuperclass());
        for (TypeParameterElement param : e.getTypeParameters()) {
            visit(param, null);
        }
        List<Element> defs = new ArrayList<>(e.getEnclosedElements()); //XXX: forcing ordering for members - not completely correct!
        Collections.sort(defs, (e1, e2) -> e1.toString().compareTo(e2.toString()));
        for (Element def : defs) {
            visit(def, null);
        }
        out.write("\n");
    } catch (IOException ex) {
        ex.printStackTrace();
    }
}

/**
 * Make a TypeVariableName for the given TypeMirror. This form is used internally to avoid
 * infinite recursion in cases like {@code Enum<E extends Enum<E>>}. When we encounter such a
 * thing, we will make a TypeVariableName without bounds and add that to the {@code typeVariables}
 * map before looking up the bounds. Then if we encounter this TypeVariable again while
 * constructing the bounds, we can just return it from the map. And, the code that put the entry
 * in {@code variables} will make sure that the bounds are filled in before returning.
 */
static com.wrmsr.wava.java.poet.TypeVariableName get(
        TypeVariable mirror, Map<TypeParameterElement, com.wrmsr.wava.java.poet.TypeVariableName> typeVariables)
{
    TypeParameterElement element = (TypeParameterElement) mirror.asElement();
    com.wrmsr.wava.java.poet.TypeVariableName typeVariableName = typeVariables.get(element);
    if (typeVariableName == null) {
        // Since the bounds field is public, we need to make it an unmodifiableList. But we control
        // the List that that wraps, which means we can change it before returning.
        List<TypeName> bounds = new ArrayList<>();
        List<TypeName> visibleBounds = Collections.unmodifiableList(bounds);
        typeVariableName = new com.wrmsr.wava.java.poet.TypeVariableName(element.getSimpleName().toString(), visibleBounds);
        typeVariables.put(element, typeVariableName);
        for (TypeMirror typeMirror : element.getBounds()) {
            bounds.add(TypeName.get(typeMirror, typeVariables));
        }
        bounds.remove(OBJECT);
    }
    return typeVariableName;
}

static TypeName get(
        javax.lang.model.type.WildcardType mirror,
        Map<TypeParameterElement, TypeVariableName> typeVariables)
{
    TypeMirror extendsBound = mirror.getExtendsBound();
    if (extendsBound == null) {
        TypeMirror superBound = mirror.getSuperBound();
        if (superBound == null) {
            return subtypeOf(Object.class);
        }
        else {
            return supertypeOf(TypeName.get(superBound, typeVariables));
        }
    }
    else {
        return subtypeOf(TypeName.get(extendsBound, typeVariables));
    }
}

@Test
public void getTypeVariableTypeMirror()
{
    List<? extends TypeParameterElement> typeVariables =
            getElement(Parameterized.class).getTypeParameters();

    // Members of converted types use ClassName and not Class<?>.
    ClassName number = ClassName.get(Number.class);
    ClassName runnable = ClassName.get(Runnable.class);
    ClassName serializable = ClassName.get(Serializable.class);

    assertThat(TypeName.get(typeVariables.get(0).asType()))
            .isEqualTo(TypeVariableName.get("Simple"));
    assertThat(TypeName.get(typeVariables.get(1).asType()))
            .isEqualTo(TypeVariableName.get("ExtendsClass", number));
    assertThat(TypeName.get(typeVariables.get(2).asType()))
            .isEqualTo(TypeVariableName.get("ExtendsInterface", runnable));
    assertThat(TypeName.get(typeVariables.get(3).asType()))
            .isEqualTo(TypeVariableName.get("ExtendsTypeVariable", TypeVariableName.get("Simple")));
    assertThat(TypeName.get(typeVariables.get(4).asType()))
            .isEqualTo(TypeVariableName.get("Intersection", number, runnable));
    assertThat(TypeName.get(typeVariables.get(5).asType()))
            .isEqualTo(TypeVariableName.get("IntersectionOfInterfaces", runnable, serializable));
    assertThat(((TypeVariableName) TypeName.get(typeVariables.get(4).asType())).bounds)
            .containsExactly(number, runnable);
}

@Override
public Void visitTypeVariable(AnnotatedTypeVariable type, GlacierAnnotatedTypeFactory p) {
    TypeParameterElement tpelt = (TypeParameterElement) type.getUnderlyingType().asElement();
    if (!visited.containsKey(tpelt)) {
        visited.put(tpelt, type);
        if (type.getAnnotations().isEmpty() &&
                type.getUpperBound().getAnnotations().isEmpty() &&
                tpelt.getEnclosingElement().getKind() != ElementKind.TYPE_PARAMETER) {
            ElementAnnotationApplier.apply(type, tpelt, p);
        }

        super.visitTypeVariable(type, p);


        visited.remove(tpelt);
    }

    return null;
}

public RuntimePermissionsElement(TypeElement element, TypeResolver resolver) {
    mTypeResolver = resolver;
    mTypeName = TypeName.get(element.asType());
    typeVariables = new ArrayList<>();
    List<? extends TypeParameterElement> typeParameters = element.getTypeParameters();
    for (TypeParameterElement element1 : typeParameters) {
        typeVariables.add(TypeVariableName.get(element1));
    }
    String claseName = element.getQualifiedName().toString();
    packageName = ProcessorUtil.getPackageName(claseName);
    className = ProcessorUtil.getClassName(claseName);
    classType = checkActivity(element, resolver);
    generatedClassName = element.getSimpleName().toString() + ConstantsProvider.GEN_CLASS_SUFFIX;
    needsPermissionsMethods = findMethods(element, NeedsPermission.class);
    validateNeedsMethods();

    showsRationaleMethods = findMethods(element, OnShowRationale.class);
    validateRationaleMethods();

    deniedPermissionMethods = findMethods(element, OnPermissionDenied.class);
    validateDeniedMethods();

    neverAskMethods = findMethods(element, OnNeverAskAgain.class);
    validateNeverAskMethods();
}

private int getFactoryProxyIndex(TypeName gtname) throws AnnotationProcessingException {
int ret = -1;
boolean found = false;
if (gtname instanceof TypeVariableName) {
    for (TypeParameterElement tpe : m_elem.getTypeParameters()) {
    ++ret;
    if (tpe.toString().equals(gtname.toString())) {
        found = true;
        break;
    }
    }
    if (!found) {
    throw new AnnotationProcessingException(null, "%s type is not found during factory proxy query.",
                        gtname.toString());             
    }
} else {
    throw new AnnotationProcessingException(null, "%s type is not generic type for factory proxy query.",
                        gtname.toString());
}
return ret;
   }

/**
 * Make a TypeVariableName for the given TypeMirror. This form is used internally to avoid
 * infinite recursion in cases like {@code Enum<E extends Enum<E>>}. When we encounter such a
 * thing, we will make a TypeVariableName without bounds and add that to the {@code typeVariables}
 * map before looking up the bounds. Then if we encounter this TypeVariable again while
 * constructing the bounds, we can just return it from the map. And, the code that put the entry
 * in {@code variables} will make sure that the bounds are filled in before returning.
 */
static TypeVariableName get(
        TypeVariable mirror, Map<TypeParameterElement, TypeVariableName> typeVariables) {
    TypeParameterElement element = (TypeParameterElement) mirror.asElement();
    TypeVariableName typeVariableName = typeVariables.get(element);
    if (typeVariableName == null) {
        // Since the bounds field is public, we need to make it an unmodifiableList. But we control
        // the List that that wraps, which means we can change it before returning.
        List<TypeName> bounds = new ArrayList<>();
        List<TypeName> visibleBounds = Collections.unmodifiableList(bounds);
        typeVariableName = new TypeVariableName(element.getSimpleName().toString(), visibleBounds);
        typeVariables.put(element, typeVariableName);
        for (TypeMirror typeMirror : element.getBounds()) {
            bounds.add(TypeName.get(typeMirror, typeVariables));
        }
        bounds.remove(OBJECT);
    }
    return typeVariableName;
}

private int getFactoryProxyIndex(TypeName gtname) throws AnnotationProcessingException {
  int ret = -1;
  boolean found = false;
  if (gtname instanceof TypeVariableName) {
    for (TypeParameterElement tpe : m_elem.getTypeParameters()) {
      ++ret;
      if (tpe.toString().equals(gtname.toString())) {
        found = true;
        break;
      }
    }
    if (!found) {
      throw new AnnotationProcessingException(null, "%s type is not found during factory proxy query.",
          gtname.toString());
    }
  } else {
    throw new AnnotationProcessingException(null, "%s type is not generic type for factory proxy query.",
        gtname.toString());
  }
  return ret;
}

@Override
public Boolean visitTypeVariable(TypeVariable a, EqualVisitorParam p) {
    if (p.type.getKind().equals(TYPEVAR)) {
        TypeVariable b = (TypeVariable) p.type;
        TypeParameterElement aElement = (TypeParameterElement) a.asElement();
        TypeParameterElement bElement = (TypeParameterElement) b.asElement();
        Set<ComparedElements> newVisiting = visitingSetPlus(p.visiting, aElement, bElement);
        if (newVisiting.equals(p.visiting)) {
            // We're already visiting this pair of elements.
            // This can happen with our friend Eclipse when looking at <T extends Comparable<T>>.
            // It incorrectly reports the upper bound of T as T itself.
            return true;
        }
        // We use aElement.getBounds() instead of a.getUpperBound() to avoid having to deal with
        // the different way intersection types (like <T extends Number & Comparable<T>>) are
        // represented before and after Java 8. We do have an issue that this code may consider
        // that <T extends Foo & Bar> is different from <T extends Bar & Foo>, but it's very
        // hard to avoid that, and not likely to be much of a problem in practice.
        return equalLists(aElement.getBounds(), bElement.getBounds(), newVisiting)
                && equal(a.getLowerBound(), b.getLowerBound(), newVisiting)
                && a.asElement().getSimpleName().equals(b.asElement().getSimpleName());
    }
    return false;
}

/**
 * Make a TypeVariableName for the given TypeMirror. This form is used internally to avoid
 * infinite recursion in cases like {@code Enum<E extends Enum<E>>}. When we encounter such a
 * thing, we will make a TypeVariableName without bounds and add that to the {@code typeVariables}
 * map before looking up the bounds. Then if we encounter this TypeVariable again while
 * constructing the bounds, we can just return it from the map. And, the code that put the entry
 * in {@code variables} will make sure that the bounds are filled in before returning.
 */
static TypeVariableName get(
    TypeVariable mirror, Map<TypeParameterElement, TypeVariableName> typeVariables) {
  TypeParameterElement element = (TypeParameterElement) mirror.asElement();
  TypeVariableName typeVariableName = typeVariables.get(element);
  if (typeVariableName == null) {
    // Since the bounds field is public, we need to make it an unmodifiableList. But we control
    // the List that that wraps, which means we can change it before returning.
    List<TypeName> bounds = new ArrayList<>();
    List<TypeName> visibleBounds = Collections.unmodifiableList(bounds);
    typeVariableName = new TypeVariableName(element.getSimpleName().toString(), visibleBounds);
    typeVariables.put(element, typeVariableName);
    for (TypeMirror typeMirror : element.getBounds()) {
      bounds.add(TypeName.get(typeMirror, typeVariables));
    }
    bounds.remove(OBJECT);
  }
  return typeVariableName;
}

/**
 * Make a TypeVariableName for the given TypeMirror. This form is used internally to avoid
 * infinite recursion in cases like {@code Enum<E extends Enum<E>>}. When we encounter such a
 * thing, we will make a TypeVariableName without bounds and add that to the {@code typeVariables}
 * map before looking up the bounds. Then if we encounter this TypeVariable again while
 * constructing the bounds, we can just return it from the map. And, the code that put the entry
 * in {@code variables} will make sure that the bounds are filled in before returning.
 */
static TypeVariableName get(
    TypeVariable mirror, Map<TypeParameterElement, TypeVariableName> typeVariables) {
  TypeParameterElement element = (TypeParameterElement) mirror.asElement();
  TypeVariableName typeVariableName = typeVariables.get(element);
  if (typeVariableName == null) {
    // Since the bounds field is public, we need to make it an unmodifiableList. But we control
    // the List that that wraps, which means we can change it before returning.
    List<TypeName> bounds = new ArrayList<>();
    List<TypeName> visibleBounds = Collections.unmodifiableList(bounds);
    typeVariableName = new TypeVariableName(element.getSimpleName().toString(), visibleBounds);
    typeVariables.put(element, typeVariableName);
    for (TypeMirror typeMirror : element.getBounds()) {
      bounds.add(TypeName.get(typeMirror, typeVariables));
    }
    bounds.remove(OBJECT);
  }
  return typeVariableName;
}

@Override public void addTo(SourceBuilder source) {
  if (!typeParameters.isEmpty()) {
    String prefix = "<";
    for (Object typeParameter : typeParameters) {
      source.add("%s%s", prefix, typeParameter);
      if (typeParameter instanceof TypeParameterElement) {
        TypeParameterElement element = (TypeParameterElement) typeParameter;
        if (!extendsObject(element)) {
          String separator = " extends ";
          for (TypeMirror bound : element.getBounds()) {
            source.add("%s%s", separator, bound);
            separator = " & ";
          }
        }
      }
      prefix = ", ";
    }
    source.add(">");
  }
}

@Override public TypeKey visitTypeVariable(TypeVariable t, Set<TypeParameterElement> visited) {
  TypeParameterElement element = (TypeParameterElement) t.asElement();
  if (visited.contains(element)) {
    // This avoids infinite recursion with adapted types like <T extends Comparable<T>>.
    // It should probably check that T is bound correctly, but this is unlikely to be an issue
    // in the wild.
    return AnyKey.get(t.toString());
  }
  visited.add(element);
  ImmutableList.Builder<TypeKey> builder = ImmutableList.builder();
  for (TypeMirror bound : element.getBounds()) {
    TypeKey boundKey = bound.accept(this, visited);
    if (!boundKey.equals(OBJECT)) {
      builder.add(boundKey);
    }
  }
  ImmutableList<TypeKey> bounds = builder.build();
  if (bounds.size() == 0) {
    return AnyKey.get(t.toString());
  } else {
    return BoundedKey.get(t.toString(), bounds);
  }
}