/* |
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* Copyright (c) 2003, 2020, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.lang.reflect; |
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/** |
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* ParameterizedType represents a parameterized type such as |
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* {@code Collection<String>}. |
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* |
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* <p>A parameterized type is created the first time it is needed by a |
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* reflective method, as specified in this package. When a |
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* parameterized type p is created, the generic class or interface declaration |
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* that p instantiates is resolved, and all type arguments of p are created |
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* recursively. See {@link java.lang.reflect.TypeVariable |
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* TypeVariable} for details on the creation process for type |
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* variables. Repeated creation of a parameterized type has no effect. |
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* |
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* <p>Instances of classes that implement this interface must implement |
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* an equals() method that equates any two instances that share the |
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* same generic class or interface declaration and have equal type parameters. |
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* |
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* @jls 4.5 Parameterized Types |
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* @since 1.5 |
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*/ |
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public interface ParameterizedType extends Type { |
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/** |
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* Returns an array of {@code Type} objects representing the actual type |
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* arguments to this type. |
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* |
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* <p>Note that in some cases, the returned array be empty. This can occur |
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* if this type represents a non-parameterized type nested within |
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* a parameterized type. |
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* |
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* @return an array of {@code Type} objects representing the actual type |
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* arguments to this type |
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* @throws TypeNotPresentException if any of the actual type arguments |
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* refers to a non-existent class or interface declaration |
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* @throws MalformedParameterizedTypeException if any of the |
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* actual type parameters refer to a parameterized type that cannot |
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* be instantiated for any reason |
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* @since 1.5 |
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*/ |
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Type[] getActualTypeArguments(); |
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/** |
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* Returns the {@code Type} object representing the class or interface |
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* that declared this type. |
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* |
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* @return the {@code Type} object representing the class or interface |
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* that declared this type |
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* @since 1.5 |
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*/ |
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Type getRawType(); |
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/** |
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* Returns a {@code Type} object representing the type that this type |
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* is a member of. For example, if this type is {@code O<T>.I<S>}, |
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* return a representation of {@code O<T>}. |
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* |
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* <p>If this type is a top-level type, {@code null} is returned. |
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* |
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* @return a {@code Type} object representing the type that |
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* this type is a member of. If this type is a top-level type, |
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* {@code null} is returned |
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* @throws TypeNotPresentException if the owner type |
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* refers to a non-existent class or interface declaration |
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* @throws MalformedParameterizedTypeException if the owner type |
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* refers to a parameterized type that cannot be instantiated |
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* for any reason |
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* @since 1.5 |
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*/ |
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Type getOwnerType(); |
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} |