Elementpublic interface 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} or
use the result of the {@link #getKind} method. Using {@code
instanceof} is not necessarily a reliable idiom for
determining 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. |
Methods Summary |
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public R | accept(javax.lang.model.element.ElementVisitor v, P p)Applies a visitor to this element.
| public javax.lang.model.type.TypeMirror | asType()Returns the type defined by this element.
A generic element defines a family of types, not just one.
If this is a generic element, a prototypical type is
returned. This is the element's invocation on the
type variables corresponding to its own formal type parameters.
For example,
for the generic class element {@code C},
the parameterized type {@code C} is returned.
The {@link Types} utility interface has more general methods
for obtaining the full range of types defined by an element.
| public boolean | equals(java.lang.Object obj)Returns {@code true} if the argument represents the same
element as {@code this}, or {@code false} otherwise.
Note that the identity of an element involves implicit state
not directly accessible from the element's methods, including
state about the presence of unrelated types. Element objects
created by different implementations of these interfaces should
not be expected to be equal even if "the same"
element is being modeled; this is analogous to the inequality
of {@code Class} objects for the same class file loaded through
different class loaders.
| public A | getAnnotation(java.lang.Class annotationType)Returns this element's annotation for the specified type if
such an annotation is present, else {@code null}. The
annotation may be either inherited or directly present on this
element.
The annotation returned by this method could contain an element
whose value is of type {@code Class}.
This value cannot be returned directly: information necessary to
locate and load a class (such as the class loader to use) is
not available, and the class might not be loadable at all.
Attempting to read a {@code Class} object by invoking the relevant
method on the returned annotation
will result in a {@link MirroredTypeException},
from which the corresponding {@link TypeMirror} may be extracted.
Similarly, attempting to read a {@code Class[]}-valued element
will result in a {@link MirroredTypesException}.
Note: This method is unlike others in this and related
interfaces. It operates on runtime reflective information —
representations of annotation types currently loaded into the
VM — rather than on the representations defined by and used
throughout these interfaces. Consequently, calling methods on
the returned annotation object can throw many of the exceptions
that can be thrown when calling methods on an annotation object
returned by core reflection. This method is intended for
callers that are written to operate on a known, fixed set of
annotation types.
| public java.util.List | getAnnotationMirrors()Returns the annotations that are directly present on this element.
To get inherited annotations as well, use
{@link Elements#getAllAnnotationMirrors(Element) getAllAnnotationMirrors}.
| public java.util.List | getEnclosedElements()Returns the elements that are, loosely speaking, directly
enclosed by this element.
A class or interface is considered to enclose the fields,
methods, constructors, and member types that it directly
declares. This includes any (implicit) default constructor and
the implicit {@code values} and {@code valueOf} methods of an
enum type.
A package encloses the top-level classes and interfaces within
it, but is not considered to enclose subpackages.
Other kinds of elements are not currently considered to enclose
any elements; however, that may change as this API or the
programming language evolves.
Note that elements of certain kinds can be isolated using
methods in {@link ElementFilter}.
| public javax.lang.model.element.Element | getEnclosingElement()Returns the innermost element
within which this element is, loosely speaking, enclosed.
- If this element is one whose declaration is lexically enclosed
immediately within the declaration of another element, that other
element is returned.
- If this is a top-level type, its package is returned.
- If this is a package, {@code null} is returned.
- If this is a type parameter, {@code null} is returned.
| public javax.lang.model.element.ElementKind | getKind()Returns the {@code kind} of this element.
| public java.util.Set | getModifiers()Returns the modifiers of this element, excluding annotations.
Implicit modifiers, such as the {@code public} and {@code static}
modifiers of interface members, are included.
| public javax.lang.model.element.Name | getSimpleName()Returns the simple (unqualified) name of this element.
The name of a generic type does not include any reference
to its formal type parameters.
For example, the simple name of the type element
{@code java.util.Set} is {@code "Set"}.
If this element represents an unnamed package, an empty name is
returned. If it represents a constructor, the name "{@code
}" is returned. If it represents a static initializer,
the name "{@code }" is returned. If it represents an
anonymous class or instance initializer, an empty name is
returned.
| public int | hashCode()Obeys the general contract of {@link Object#hashCode Object.hashCode}.
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