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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 | +} | |