Wed, 27 Apr 2016 01:34:52 +0800
Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/langtools/
changeset: 2573:53ca196be1ae
tag: jdk8u25-b17
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™ 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 Ahé |
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 | } |