Package org.eclipse.jdt.core.dom

Class Type

java.lang.Object
org.eclipse.jdt.core.dom.ASTNode
org.eclipse.jdt.core.dom.Type
Direct Known Subclasses:
AnnotatableType, ArrayType, IntersectionType, ParameterizedType, UnionType
public abstract class Type extends ASTNode
Abstract base class of all type reference AST node types. A type node represents a reference to a primitive type (including void), to an array type, or to a simple named type (or type variable), to a qualified type, to a parameterized type, to a union type, to an intersection type, or to a wildcard type. Note that not all of these are meaningful in all contexts; for example, a wildcard type is only meaningful in the type argument position of a parameterized type. UnionType got introduced in JLS4 to support common catch blocks for disjunctive types. For JLS8, optional annotations indicated by {Annotation} got added. 
 Type:
    AnnotatableType:
       PrimitiveType
       SimpleType
       QualifiedType
       NameQualifiedType
       WildcardType
    ArrayType
    ParameterizedType
    UnionType
    IntersectionType

 PrimitiveType:
    { Annotation } byte
    { Annotation } short
    { Annotation } char
    { Annotation } int
    { Annotation } long
    { Annotation } float
    { Annotation } double
    { Annotation } boolean
    { Annotation } void
 ArrayType:
    Type Dimension { Dimension }
 SimpleType:
    { Annotation } TypeName
 QualifiedType:
    Type . {Annotation} SimpleName
 NameQualifiedType:
    Name . { Annotation } SimpleName
 WildcardType:
    { Annotation } ? [ ( extends | super) Type ]
 ParameterizedType:
    Type < Type { , Type } >
 UnionType:
    Type | Type { | Type }
 IntersectionType:
    Type & Type { & Type }
Since:
2.0

  • Method Details

    • isPrimitiveType

      public final boolean isPrimitiveType()
      Returns whether this type is a primitive type (PrimitiveType).
      Returns:
      true if this is a primitive type, and false otherwise

    • isSimpleType

      public final boolean isSimpleType()
      Returns whether this type is a simple type (SimpleType).
      Returns:
      true if this is a simple type, and false otherwise

    • isArrayType

      public final boolean isArrayType()
      Returns whether this type is an array type (ArrayType).
      Returns:
      true if this is an array type, and false otherwise

    • isNameQualifiedType

      public final boolean isNameQualifiedType()
      Returns whether this type is a name qualified type (NameQualifiedType).
      Returns:
      true if this is a name qualified type, and false otherwise
      Since:
      3.10

    • isParameterizedType

      public final boolean isParameterizedType()
      Returns whether this type is a parameterized type (ParameterizedType).
      Returns:
      true if this is a parameterized type, and false otherwise
      Since:
      3.1

    • isQualifiedType

      public final boolean isQualifiedType()
      Returns whether this type is a qualified type (QualifiedType).

      Note that a type like "A.B" can be represented either of two ways:

      1. QualifiedType(SimpleType(SimpleName("A")),SimpleName("B"))
      2. SimpleType(QualifiedName(SimpleName("A"),SimpleName("B")))
      The first form is preferred when "A" is known to be a type. However, a parser cannot always determine this. Clients should be prepared to handle either rather than make assumptions. (Note also that the first form became possible as of JLS3; only the second form existed in the JLS2 API.)
      Returns:
      true if this is a qualified type, and false otherwise
      Since:
      3.1

    • isUnionType

      public final boolean isUnionType()
      Returns whether this type is a union type (UnionType).
      Returns:
      true if this is a union type, and false otherwise
      Since:
      3.7.1

    • isVar

      public boolean isVar()
      Returns whether this type is a var. The convenience method checks whether the type is so named.
      Returns:
      true if this is a var, and false otherwise
      Throws:
      UnsupportedOperationException - if this operation is used in an AST of level less than JLS10
      Since:
      3.14

    • isIntersectionType

      public final boolean isIntersectionType()
      Returns whether this type is an intersection type (IntersectionType).
      Returns:
      true if this is an intersection type, and false otherwise
      Since:
      3.10

    • isWildcardType

      public final boolean isWildcardType()
      Returns whether this type is a wildcard type (WildcardType).

      Note that a wildcard type is only meaningful as a type argument of a ParameterizedType node.

      Returns:
      true if this is a wildcard type, and false otherwise
      Since:
      3.1

    • isAnnotatable

      public boolean isAnnotatable()
      Returns whether this type can be annotated. All sub-classes of AnnotatableType can be annotated.
      Returns:
      true if this type is an instance of AnnotatableType, and false otherwise
      Since:
      3.10

    • resolveBinding

      public final ITypeBinding resolveBinding()
      Resolves and returns the binding for this type.

      Note that bindings are generally unavailable unless requested when the AST is being built.

      Returns:
      the type binding, or null if the binding cannot be resolved