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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 | +} | |