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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 | /** | ||
| 30 | * ParameterizedType represents a parameterized type such as | ||
| 31 | * Collection<String>. | ||
| 32 | * | ||
| 33 | * <p>A parameterized type is created the first time it is needed by a | ||
| 34 | * reflective method, as specified in this package. When a | ||
| 35 | * parameterized type p is created, the generic type declaration that | ||
| 36 | * p instantiates is resolved, and all type arguments of p are created | ||
| 37 | * recursively. See {@link java.lang.reflect.TypeVariable | ||
| 38 | * TypeVariable} for details on the creation process for type | ||
| 39 | * variables. Repeated creation of a parameterized type has no effect. | ||
| 40 | * | ||
| 41 | * <p>Instances of classes that implement this interface must implement | ||
| 42 | * an equals() method that equates any two instances that share the | ||
| 43 | * same generic type declaration and have equal type parameters. | ||
| 44 | * | ||
| 45 | * @since 1.5 | ||
| 46 | */ | ||
| 47 | public interface ParameterizedType extends Type { | ||
| 48 | /** | ||
| 49 | * Returns an array of {@code Type} objects representing the actual type | ||
| 50 | * arguments to this type. | ||
| 51 | * | ||
| 52 | * <p>Note that in some cases, the returned array be empty. This can occur | ||
| 53 | * if this type represents a non-parameterized type nested within | ||
| 54 | * a parameterized type. | ||
| 55 | * | ||
| 56 | * @return an array of {@code Type} objects representing the actual type | ||
| 57 | * arguments to this type | ||
| 58 | * @throws TypeNotPresentException if any of the | ||
| 59 | * actual type arguments refers to a non-existent type declaration | ||
| 60 | * @throws MalformedParameterizedTypeException if any of the | ||
| 61 | * actual type parameters refer to a parameterized type that cannot | ||
| 62 | * be instantiated for any reason | ||
| 63 | * @since 1.5 | ||
| 64 | */ | ||
| 65 | Type[] getActualTypeArguments(); | ||
| 66 | |||
| 67 | /** | ||
| 68 | * Returns the {@code Type} object representing the class or interface | ||
| 69 | * that declared this type. | ||
| 70 | * | ||
| 71 | * @return the {@code Type} object representing the class or interface | ||
| 72 | * that declared this type | ||
| 73 | * @since 1.5 | ||
| 74 | */ | ||
| 75 | Type getRawType(); | ||
| 76 | |||
| 77 | /** | ||
| 78 | * Returns a {@code Type} object representing the type that this type | ||
| 79 | * is a member of. For example, if this type is {@code O<T>.I<S>}, | ||
| 80 | * return a representation of {@code O<T>}. | ||
| 81 | * | ||
| 82 | * <p>If this type is a top-level type, {@code null} is returned. | ||
| 83 | * | ||
| 84 | * @return a {@code Type} object representing the type that | ||
| 85 | * this type is a member of. If this type is a top-level type, | ||
| 86 | * {@code null} is returned | ||
| 87 | * @throws TypeNotPresentException if the owner type | ||
| 88 | * refers to a non-existent type declaration | ||
| 89 | * @throws MalformedParameterizedTypeException if the owner type | ||
| 90 | * refers to a parameterized type that cannot be instantiated | ||
| 91 | * for any reason | ||
| 92 | * @since 1.5 | ||
| 93 | */ | ||
| 94 | Type getOwnerType(); | ||
| 95 | } | ||