Overview Package Class Use Source Tree Index Deprecated About
Prev Class | Next ClassFrames | No Frames
Summary: Nested | Field | Method | ConstrDetail: Nested | Field | Method | Constr

java.lang.reflect

Interface ParameterizedType

All Superinterfaces:
Type
public interface ParameterizedType
extends Type
Represents a type which is parameterized over one or more other types. For example, List<Integer> is a parameterized type, with List parameterized over the type Integer.

Instances of this classes are created as needed, during reflection. On creating a parameterized type, p, the GenericTypeDeclaration corresponding to p is created and resolved. Each type argument of p is then created recursively; details of this process are availble in the documentation of TypeVariable. This creation process only happens once; repetition has no effect.

Implementors of this interface must implement an appropriate equals() method. This method should equate any two instances of the implementing class that have the same GenericTypeDeclaration and Type parameters.

Since:
1.5
See Also:
GenericDeclaration, TypeVariable

Method Summary

Type[]
getActualTypeArguments()
Returns an array of Type objects, which gives the parameters of this type.
Type
getOwnerType()
Returns the type of which this type is a member.
Type
getRawType()
Returns a version of this type without parameters, which corresponds to the class or interface which declared the type.

Method Details

getActualTypeArguments

public Type[] getActualTypeArguments()
Returns an array of Type objects, which gives the parameters of this type.

Note: the returned array may be empty. This occurs if the supposed ParameterizedType is simply a normal type wrapped inside a parameterized type.

Returns:
an array of Types, representing the arguments of this type.
Throws:
TypeNotPresentException - if any of the types referred to by the parameters of this type do not actually exist.
MalformedParameterizedTypeException - if any of the types refer to a type which can not be instantiated.

getOwnerType

public Type getOwnerType()
Returns the type of which this type is a member. For example, in Top<String>.Bottom<Integer>, Bottom<Integer> is a member of Top<String>, and so the latter is returned by this method. Calling this method on top-level types (such as Top<String>) returns null.
Returns:
the type which owns this type.
Throws:
TypeNotPresentException - if the owner type referred to by this type do not actually exist.
MalformedParameterizedTypeException - if the owner type referred to by this type can not be instantiated.

getRawType

public Type getRawType()
Returns a version of this type without parameters, which corresponds to the class or interface which declared the type. For example, the raw type corresponding to List<Double> is List, which was declared by the List class.
Returns:
the raw variant of this type (i.e. the type without parameters).
ParameterizedType.java -- Represents parameterized types e.g. List Copyright (C) 2004, 2005 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.

Overview Package Class Use Source Tree Index Deprecated About