Examples of javax.lang.model.element.Element

javax.lang.model.element.Element
Represents a program element such as a package, class, or method. Each element represents a static, language-level construct (and not, for example, a runtime construct of the virtual machine).
Elements should be compared using the {@link #equals(Object)}method. There is no guarantee that any particular element will always be represented by the same object.
To implement operations based on the class of an {@code Element} object, either use a {@linkplain ElementVisitor visitor} oruse the result of the {@link #getKind} method. Using {@code instanceof} is not necessarily a reliable idiom fordetermining the effective class of an object in this modeling hierarchy since an implementation may choose to have a single object implement multiple {@code Element} subinterfaces. @author Joseph D. Darcy @author Scott Seligman @author Peter von der Ahé @see Elements @see TypeMirror @since 1.6

        return super.visitReference(tree, ignore);
    }


    @Override
    public Void visitReturn(ReturnTree tree, Void ignore) {
        Element e = env.trees.getElement(env.currPath);
        if (e.getKind() != ElementKind.METHOD
                || ((ExecutableElement) e).getReturnType().getKind() == TypeKind.VOID)
            env.messages.error(REFERENCE, tree, "dc.invalid.return");
        foundReturn = true;
        warnIfEmpty(tree, tree.getDescription());
        return super.visitReturn(tree, ignore);

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    }


    @Override
    public Void visitThrows(ThrowsTree tree, Void ignore) {
        ReferenceTree exName = tree.getExceptionName();
        Element ex = env.trees.getElement(new DocTreePath(getCurrentPath(), exName));
        if (ex == null) {
            env.messages.error(REFERENCE, tree, "dc.ref.not.found");
        } else if (isThrowable(ex.asType())) {
            switch (env.currElement.getKind()) {
                case CONSTRUCTOR:
                case METHOD:
                    if (isCheckedException(ex.asType())) {
                        ExecutableElement ee = (ExecutableElement) env.currElement;
                        checkThrowsDeclared(exName, ex.asType(), ee.getThrownTypes());
                    }
                    break;
                default:
                    env.messages.error(REFERENCE, tree, "dc.invalid.throws");
            }

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        ReferenceTree ref = tree.getReference();
        if (ref == null || ref.getSignature().isEmpty()) {
            if (!isConstant(env.currElement))
                env.messages.error(REFERENCE, tree, "dc.value.not.allowed.here");
        } else {
            Element e = env.trees.getElement(new DocTreePath(getCurrentPath(), ref));
            if (!isConstant(e))
                env.messages.error(REFERENCE, tree, "dc.value.not.a.constant");
        }


        markEnclosingTag(Flag.HAS_INLINE_TAG);

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    protected final String jniType(TypeMirror t) {
        TypeElement throwable = elements.getTypeElement("java.lang.Throwable");
        TypeElement jClass = elements.getTypeElement("java.lang.Class");
        TypeElement jString = elements.getTypeElement("java.lang.String");
        Element tclassDoc = types.asElement(t);




        switch (t.getKind()) {
            case ARRAY: {
                TypeMirror ct = ((ArrayType) t).getComponentType();
                switch (ct.getKind()) {
                    case BOOLEAN:  return "jbooleanArray";
                    case BYTE:     return "jbyteArray";
                    case CHAR:     return "jcharArray";
                    case SHORT:    return "jshortArray";
                    case INT:      return "jintArray";
                    case LONG:     return "jlongArray";
                    case FLOAT:    return "jfloatArray";
                    case DOUBLE:   return "jdoubleArray";
                    case ARRAY:
                    case DECLARED: return "jobjectArray";
                    default: throw new Error(ct.toString());
                }
            }


            case VOID:     return "void";
            case BOOLEAN:  return "jboolean";
            case BYTE:     return "jbyte";
            case CHAR:     return "jchar";
            case SHORT:    return "jshort";
            case INT:      return "jint";
            case LONG:     return "jlong";
            case FLOAT:    return "jfloat";
            case DOUBLE:   return "jdouble";


            case DECLARED: {
                if (tclassDoc.equals(jString))
                    return "jstring";
                else if (types.isAssignable(t, throwable.asType()))
                    return "jthrowable";
                else if (types.isAssignable(t, jClass.asType()))
                    return "jclass";

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    }
    // resolve type parameters, if any
    ExecutableType xType = viewIn(checkedElement, x, state);
    TypeMirror returnType = xType.getReturnType();
    if (state.types.isAssignable(returnType, state.requestContextType)) {
      Element returnTypeElement = state.types.asElement(returnType);
      if (!returnTypeElement.getKind().equals(ElementKind.INTERFACE)) {
        state.poison(x, Messages.factoryMustReturnInterface(returnTypeElement.getSimpleName()));
      } else {
        TypeElement contextElement = (TypeElement) returnTypeElement;
        state.maybeScanContext(contextElement);
        state.requireMapping(contextElement);
      }

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    private boolean isValidType(final TypeMirror type)
    {
        Types typeUtils = processingEnv.getTypeUtils();
        Elements elementUtils = processingEnv.getElementUtils();
        Element typeElement = typeUtils.asElement(type);


        if (VALID_PRIMITIVE_TYPES.contains(type.getKind()))
        {
            return true;
        }
        for(TypeKind primitive : VALID_PRIMITIVE_TYPES)
        {
            if(typeUtils.isSameType(type, typeUtils.boxedClass(typeUtils.getPrimitiveType(primitive)).asType()))
            {
                return true;
            }
        }
        if(typeElement.getKind()==ElementKind.ENUM)
        {
            return true;
        }


        String className = "org.apache.qpid.server.model.ConfiguredObject";

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     * INTERNAL:
     * If the adds a new element will build it and add it to our list of
     * MetadataClasses.
     */
    public MetadataClass getMetadataClass(TypeMirror typeMirror) {
        Element element = processingEnv.getTypeUtils().asElement(typeMirror);
        
        if (element == null) {
            // This case hits when we are passed a TypeMirror of <none>. Not
            // 100% on the whole story here, either way we create a metadata 
            // class with that name and carry on. The case also hits when we

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  }


  private TypeElement getAnnotationReturnType(ExecutableElement method) {
    TypeMirror returnTypeMirror = method.getReturnType();
    if (returnTypeMirror.getKind() == TypeKind.DECLARED) {
      Element returnTypeElement = typeUtils.asElement(method.getReturnType());
      if (returnTypeElement.getKind() == ElementKind.ANNOTATION_TYPE) {
        return (TypeElement) returnTypeElement;
      }
    }
    throw abortWithError("Return type of @AutoAnnotation method must be an annotation type, not "
        + returnTypeMirror, method);

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   * Returns the name of the package that the given type is in. If the type is in the default
   * (unnamed) package then the name is the empty string.
   */
  static String packageNameOf(TypeElement type) {
    while (true) {
      Element enclosing = type.getEnclosingElement();
      if (enclosing instanceof PackageElement) {
        return ((PackageElement) enclosing).getQualifiedName().toString();
      }
      type = (TypeElement) enclosing;
    }

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    if (persistenceAnnotated.size() > 1) {
      messager.printMessage(Kind.ERROR, "Only one @Persistence activator is allowed within the project", persistenceAnnotated.iterator().next());
      return null;
    }
    Element persistenceClass = persistenceAnnotated.iterator().next();
    Persistence persistence = persistenceClass.getAnnotation(Persistence.class);
    return persistence;
  }

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