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src/share/classes/javax/lang/model/type/TypeVariable.java@2eb010b6cb22 (annotated)

src/share/classes/javax/lang/model/type/TypeVariable.java

Thu, 31 Aug 2017 15:17:03 +0800

author

aoqi

date

Thu, 31 Aug 2017 15:17:03 +0800

changeset 2525

2eb010b6cb22

parent 2200

7c89d200781b

parent 0

959103a6100f

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation. Oracle designates this
aoqi@0	8	* particular file as subject to the "Classpath" exception as provided
aoqi@0	9	* by Oracle in the LICENSE file that accompanied this code.
aoqi@0	10	*
aoqi@0	11	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	14	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	15	* accompanied this code).
aoqi@0	16	*
aoqi@0	17	* You should have received a copy of the GNU General Public License version
aoqi@0	18	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	19	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	20	*
aoqi@0	21	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	22	* or visit www.oracle.com if you need additional information or have any
aoqi@0	23	* questions.
aoqi@0	24	*/
aoqi@0	25
aoqi@0	26	package javax.lang.model.type;
aoqi@0	27
aoqi@0	28
aoqi@0	29	import javax.lang.model.element.Element;
aoqi@0	30	import javax.lang.model.element.TypeParameterElement;
aoqi@0	31	import javax.lang.model.util.Types;
aoqi@0	32
aoqi@0	33
aoqi@0	34	/**
aoqi@0	35	* Represents a type variable.
aoqi@0	36	* A type variable may be explicitly declared by a
aoqi@0	37	* {@linkplain TypeParameterElement type parameter} of a
aoqi@0	38	* type, method, or constructor.
aoqi@0	39	* A type variable may also be declared implicitly, as by
aoqi@0	40	* the capture conversion of a wildcard type argument
aoqi@0	41	* (see chapter 5 of
aoqi@0	42	* <cite>The Java&trade; Language Specification</cite>).
aoqi@0	43	*
aoqi@0	44	* @author Joseph D. Darcy
aoqi@0	45	* @author Scott Seligman
aoqi@0	46	* @author Peter von der Ah&eacute;
aoqi@0	47	* @see TypeParameterElement
aoqi@0	48	* @since 1.6
aoqi@0	49	*/
aoqi@0	50	public interface TypeVariable extends ReferenceType {
aoqi@0	51
aoqi@0	52	/**
aoqi@0	53	* Returns the element corresponding to this type variable.
aoqi@0	54	*
aoqi@0	55	* @return the element corresponding to this type variable
aoqi@0	56	*/
aoqi@0	57	Element asElement();
aoqi@0	58
aoqi@0	59	/**
aoqi@0	60	* Returns the upper bound of this type variable.
aoqi@0	61	*
aoqi@0	62	* <p> If this type variable was declared with no explicit
aoqi@0	63	* upper bounds, the result is {@code java.lang.Object}.
aoqi@0	64	* If it was declared with multiple upper bounds,
aoqi@0	65	* the result is an {@linkplain IntersectionType intersection type};
aoqi@0	66	* individual bounds can be found by examining the result's
aoqi@0	67	* {@linkplain IntersectionType#getBounds() bounds}.
aoqi@0	68	*
aoqi@0	69	* @return the upper bound of this type variable
aoqi@0	70	*/
aoqi@0	71	TypeMirror getUpperBound();
aoqi@0	72
aoqi@0	73	/**
aoqi@0	74	* Returns the lower bound of this type variable. While a type
aoqi@0	75	* parameter cannot include an explicit lower bound declaration,
aoqi@0	76	* capture conversion can produce a type variable with a
aoqi@0	77	* non-trivial lower bound. Type variables otherwise have a
aoqi@0	78	* lower bound of {@link NullType}.
aoqi@0	79	*
aoqi@0	80	* @return the lower bound of this type variable
aoqi@0	81	*/
aoqi@0	82	TypeMirror getLowerBound();
aoqi@0	83	}