J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2004 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package java.lang.reflect; |
| 27 | |
| 28 | /** |
| 29 | * WildcardType represents a wildcard type expression, such as |
| 30 | * {@code ?}, {@code ? extends Number}, or {@code ? super Integer}. |
| 31 | * |
| 32 | * @since 1.5 |
| 33 | */ |
| 34 | public interface WildcardType extends Type { |
| 35 | /** |
| 36 | * Returns an array of {@code Type} objects representing the upper |
| 37 | * bound(s) of this type variable. Note that if no upper bound is |
| 38 | * explicitly declared, the upper bound is {@code Object}. |
| 39 | * |
| 40 | * <p>For each upper bound B : |
| 41 | * <ul> |
| 42 | * <li>if B is a parameterized type or a type variable, it is created, |
| 43 | * (see {@link java.lang.reflect.ParameterizedType ParameterizedType} |
| 44 | * for the details of the creation process for parameterized types). |
| 45 | * <li>Otherwise, B is resolved. |
| 46 | * </ul> |
| 47 | * |
| 48 | * @return an array of Types representing the upper bound(s) of this |
| 49 | * type variable |
| 50 | * @throws TypeNotPresentException if any of the |
| 51 | * bounds refers to a non-existent type declaration |
| 52 | * @throws MalformedParameterizedTypeException if any of the |
| 53 | * bounds refer to a parameterized type that cannot be instantiated |
| 54 | * for any reason |
| 55 | */ |
| 56 | Type[] getUpperBounds(); |
| 57 | |
| 58 | /** |
| 59 | * Returns an array of {@code Type} objects representing the |
| 60 | * lower bound(s) of this type variable. Note that if no lower bound is |
| 61 | * explicitly declared, the lower bound is the type of {@code null}. |
| 62 | * In this case, a zero length array is returned. |
| 63 | * |
| 64 | * <p>For each lower bound B : |
| 65 | * <ul> |
| 66 | * <li>if B is a parameterized type or a type variable, it is created, |
| 67 | * (see {@link java.lang.reflect.ParameterizedType ParameterizedType} |
| 68 | * for the details of the creation process for parameterized types). |
| 69 | * <li>Otherwise, B is resolved. |
| 70 | * </ul> |
| 71 | * |
| 72 | * @return an array of Types representing the lower bound(s) of this |
| 73 | * type variable |
| 74 | * @throws TypeNotPresentException if any of the |
| 75 | * bounds refers to a non-existent type declaration |
| 76 | * @throws MalformedParameterizedTypeException if any of the |
| 77 | * bounds refer to a parameterized type that cannot be instantiated |
| 78 | * for any reason |
| 79 | */ |
| 80 | Type[] getLowerBounds(); |
| 81 | // one or many? Up to language spec; currently only one, but this API |
| 82 | // allows for generalization. |
| 83 | } |