com.google.gwt.emul.java.lang.reflect.TypeVariable Maven / Gradle / Ivy
/*
* %W% %E%
*
* Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package java.lang.reflect;
/**
* TypeVariable is the common superinterface for type variables of kinds.
* A type variable is created the first time it is needed by a reflective
* method, as specified in this package. If a type variable t is referenced
* by a type (i.e, class, interface or annotation type) T, and T is declared
* by the nth enclosing class of T (see JLS 8.1.2), then the creation of t
* requires the resolution (see JVMS 5) of the ith enclosing class of T,
* for i = 0 to n, inclusive. Creating a type variable must not cause the
* creation of its bounds. Repeated creation of a type variable has no effect.
*
* Multiple objects may be instantiated at run-time to
* represent a given type variable. Even though a type variable is
* created only once, this does not imply any requirement to cache
* instances representing the type variable. However, all instances
* representing a type variable must be equal() to each other.
* As a consequence, users of type variables must not rely on the identity
* of instances of classes implementing this interface.
*
* @param the type of generic declaration that declared the
* underlying type variable.
*
* @since 1.5
*/
public interface TypeVariable extends Type {
/**
* Returns an array of Type objects representing the
* upper bound(s) of this type variable. Note that if no upper bound is
* explicitly declared, the upper bound is Object.
*
* For each upper bound B:
- if B is a parameterized
* type or a type variable, it is created, (see {@link
* java.lang.reflect.ParameterizedType ParameterizedType} for the
* details of the creation process for parameterized types).
*
- Otherwise, B is resolved.
*
* @throws TypeNotPresentException if any of the
* bounds refers to a non-existent type declaration
* @throws MalformedParameterizedTypeException if any of the
* bounds refer to a parameterized type that cannot be instantiated
* for any reason
* @return an array of Types representing the upper
* bound(s) of this type variable
*/
Type[] getBounds();
/**
* Returns the GenericDeclaration object representing the
* generic declaration declared this type variable.
*
* @return the generic declaration declared for this type variable.
*
* @since 1.5
*/
D getGenericDeclaration();
/**
* Returns the name of this type variable, as it occurs in the source code.
*
* @return the name of this type variable, as it appears in the source code
*/
String getName();
}