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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   }

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