1 /*
   2  * Copyright (c) 2005, 2019, 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 javax.lang.model.element;
  27 
  28 import java.util.List;
  29 import javax.lang.model.type.TypeMirror;
  30 import javax.lang.model.type.TypeVariable;
  31 
  32 /**
  33  * Represents a formal type parameter of a generic class, interface, method,
  34  * or constructor element.
  35  * A type parameter declares a {@link TypeVariable}.
  36  *
  37  * @author Joseph D. Darcy
  38  * @author Scott Seligman
  39  * @author Peter von der Ahé
  40  * @see TypeVariable
  41  * @since 1.6
  42  */
  43 public interface TypeParameterElement extends Element {
  44     /**
  45      * Returns the {@linkplain TypeVariable type variable} corresponding to this type parameter element.
  46      *
  47      * @see TypeVariable
  48      *
  49      * @return the type variable corresponding to this type parameter element
  50      */
  51     @Override
  52     TypeMirror asType();
  53 
  54     /**
  55      * Returns the generic class, interface, method, or constructor that is
  56      * parameterized by this type parameter.
  57      *
  58      * @return the generic class, interface, method, or constructor that is
  59      * parameterized by this type parameter
  60      */
  61     Element getGenericElement();
  62 
  63     /**
  64      * Returns the bounds of this type parameter.
  65      * These are the types given by the {@code extends} clause
  66      * used to declare this type parameter.
  67      * If no explicit {@code extends} clause was used,
  68      * then {@code java.lang.Object} is considered to be the sole bound.
  69      *
  70      * @return the bounds of this type parameter, or an empty list if
  71      * there are none
  72      */
  73     List<? extends TypeMirror> getBounds();
  74 
  75     /**
  76      * Returns the {@linkplain TypeParameterElement#getGenericElement generic element} of this type parameter.
  77      *
  78      * @return the generic element of this type parameter
  79      */
  80     @Override
  81     Element getEnclosingElement();
  82 }