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| 1 | /* | ||
| 2 | * Copyright (c) 2003, 2004, Oracle and/or its affiliates. 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * 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 | } | ||