Package org.jboss.jandex

Class ParameterizedType

java.lang.Object

org.jboss.jandex.Type

org.jboss.jandex.ParameterizedType

public class ParameterizedType
extends Type

Represents a generic parameterized type. The name() corresponds to the raw type, and the arguments list corresponds to a list of type arguments passed to the parameterized type.

Additionally, a parameterized type is used to represent an inner class whose enclosing class is either parameterized or has type annotations. In this case, the owner() method will specify the type for the enclosing class. It is also possible for such a type to be parameterized itself.

For example, the follow declaration would have a name of "java.util.Map", and two ClassType arguments, the first being "java.lang.String", the second "java.lang.Integer":

     java.util.Map<String, Integer>
 

Another example shows the case where a parameterized type is used to represent a non-parameterized class (X), whose owner (Y) is itself parameterized:

     Y<String>.X
 

Since:

2.0

Author:

Jason T. Greene

Nested Class Summary

Nested classes/interfaces inherited from class org.jboss.jandex.Type

Type.Kind

Field Summary

Fields inherited from class org.jboss.jandex.Type

EMPTY_ARRAY

Method Summary

Modifier and Type	Method	Description
List<Type>	arguments()	Returns the list of arguments passed to this Parameterized type.
ParameterizedType	asParameterizedType()	Casts this type to a ParameterizedType and returns it if the kind is Type.Kind.PARAMETERIZED_TYPE Throws an exception otherwise.
static ParameterizedType	create(DotName name, Type[] arguments, Type owner)	Create a new mock instance.
boolean	equals(Object o)	Compares this Type with another type, and returns true if they are equivalent.
int	hashCode()	Computes a hash code representing this type.
Type.Kind	kind()	Returns the kind of Type this is.
Type	owner()	Returns the owner (enclosing) type of this parameterized type if the owner is parameterized, or contains type annotations.
String	toString()	Returns a string representation for this type.

Methods inherited from class org.jboss.jandex.Type

annotation, annotations, asArrayType, asClassType, asPrimitiveType, asTypeVariable, asUnresolvedTypeVariable, asVoidType, asWildcardType, create, hasAnnotation, name

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

create

public static ParameterizedType create(DotName name,
                                       Type[] arguments,
                                       Type owner)

Create a new mock instance.

Parameters:

name - the name of this type

arguments - an array of types representing arguments to this type

owner - the enclosing type if annotated or parameterized, otherwise null

Returns:

the mock instance

Since:

2.1

arguments

public List<Type> arguments()

Returns the list of arguments passed to this Parameterized type.

Returns:

the list of type arguments, or empty if none

owner

public Type owner()

Returns the owner (enclosing) type of this parameterized type if the owner is parameterized, or contains type annotations. The latter may be a ClassType. Otherwise null is returned.

Note that this means that inner classes whose enclosing types are not parameterized or annotated may return null when this method is called.

The example below shows the case where a parameterized type is used to represent a non-parameterized class (X).

     Y<String>.X
 

This example will return a parameterized type for "Y" when X's owner() method is called.

Returns:

the owner type if the owner is parameterized or annotated, otherwise null

kind

public Type.Kind kind()

Description copied from class: Type

Returns the kind of Type this is.

Specified by:

kind in class Type

Returns:

the kind

asParameterizedType

public ParameterizedType asParameterizedType()

Description copied from class: Type

Casts this type to a ParameterizedType and returns it if the kind is Type.Kind.PARAMETERIZED_TYPE Throws an exception otherwise.

Overrides:

asParameterizedType in class Type

Returns:

a ClassType

toString

public String toString()

Description copied from class: Type

Returns a string representation for this type. It is similar, yet not equivalent to a Java source code representation.

Overrides:

toString in class Type

Returns:

the string representation.

equals

public boolean equals(Object o)

Description copied from class: Type

Compares this Type with another type, and returns true if they are equivalent. A type is equivalent to another type if it is the same kind, and all of its fields are equal. This includes annotations, which must be equal as well.

Overrides:

equals in class Type

Parameters:

o - the type to compare to

Returns:

true if equal

See Also:

Object.equals(Object)

hashCode

public int hashCode()

Description copied from class: Type

Computes a hash code representing this type.

Overrides:

hashCode in class Type

Returns:

the hash code