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| 1 | /* | ||
| 2 | * Copyright (c) 2003, 2005, 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 | * TypeVariable is the common superinterface for type variables of kinds. | ||
| 30 | * A type variable is created the first time it is needed by a reflective | ||
| 31 | * method, as specified in this package. If a type variable t is referenced | ||
| 32 | * by a type (i.e, class, interface or annotation type) T, and T is declared | ||
| 33 | * by the nth enclosing class of T (see JLS 8.1.2), then the creation of t | ||
| 34 | * requires the resolution (see JVMS 5) of the ith enclosing class of T, | ||
| 35 | * for i = 0 to n, inclusive. Creating a type variable must not cause the | ||
| 36 | * creation of its bounds. Repeated creation of a type variable has no effect. | ||
| 37 | * | ||
| 38 | * <p>Multiple objects may be instantiated at run-time to | ||
| 39 | * represent a given type variable. Even though a type variable is | ||
| 40 | * created only once, this does not imply any requirement to cache | ||
| 41 | * instances representing the type variable. However, all instances | ||
| 42 | * representing a type variable must be equal() to each other. | ||
| 43 | * As a consequence, users of type variables must not rely on the identity | ||
| 44 | * of instances of classes implementing this interface. | ||
| 45 | * | ||
| 46 | * @param <D> the type of generic declaration that declared the | ||
| 47 | * underlying type variable. | ||
| 48 | * | ||
| 49 | * @since 1.5 | ||
| 50 | */ | ||
| 51 | public interface TypeVariable<D extends GenericDeclaration> extends Type { | ||
| 52 | /** | ||
| 53 | * Returns an array of {@code Type} objects representing the | ||
| 54 | * upper bound(s) of this type variable. Note that if no upper bound is | ||
| 55 | * explicitly declared, the upper bound is {@code Object}. | ||
| 56 | * | ||
| 57 | * <p>For each upper bound B: <ul> <li>if B is a parameterized | ||
| 58 | * type or a type variable, it is created, (see {@link | ||
| 59 | * java.lang.reflect.ParameterizedType ParameterizedType} for the | ||
| 60 | * details of the creation process for parameterized types). | ||
| 61 | * <li>Otherwise, B is resolved. </ul> | ||
| 62 | * | ||
| 63 | * @throws TypeNotPresentException if any of the | ||
| 64 | * bounds refers to a non-existent type declaration | ||
| 65 | * @throws MalformedParameterizedTypeException if any of the | ||
| 66 | * bounds refer to a parameterized type that cannot be instantiated | ||
| 67 | * for any reason | ||
| 68 | * @return an array of {@code Type}s representing the upper | ||
| 69 | * bound(s) of this type variable | ||
| 70 | */ | ||
| 71 | Type[] getBounds(); | ||
| 72 | |||
| 73 | /** | ||
| 74 | * Returns the {@code GenericDeclaration} object representing the | ||
| 75 | * generic declaration declared this type variable. | ||
| 76 | * | ||
| 77 | * @return the generic declaration declared for this type variable. | ||
| 78 | * | ||
| 79 | * @since 1.5 | ||
| 80 | */ | ||
| 81 | D getGenericDeclaration(); | ||
| 82 | |||
| 83 | /** | ||
| 84 | * Returns the name of this type variable, as it occurs in the source code. | ||
| 85 | * | ||
| 86 | * @return the name of this type variable, as it appears in the source code | ||
| 87 | */ | ||
| 88 | String getName(); | ||
| 89 | } | ||