1 /*
   2  * Copyright (c) 2005, 2015, 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 /**
  29  * The {@code kind} of an element.
  30  *
  31  * <p>Note that it is possible additional element kinds will be added
  32  * to accommodate new, currently unknown, language structures added to
  33  * future versions of the Java&trade; programming language.
  34  *
  35  * @author Joseph D. Darcy
  36  * @author Scott Seligman
  37  * @author Peter von der Ah&eacute;
  38  * @see Element
  39  * @since 1.6
  40  */
  41 public enum ElementKind {
  42 
  43     /** A package. */
  44     PACKAGE,
  45 
  46     // Declared types
  47     /** An enum type. */
  48     ENUM,
  49     /** A class not described by a more specific kind (like {@code ENUM}). */
  50     CLASS,
  51     /** An annotation type. */
  52     ANNOTATION_TYPE,
  53     /**
  54      * An interface not described by a more specific kind (like
  55      * {@code ANNOTATION_TYPE}).
  56      */
  57     INTERFACE,
  58 
  59     // Variables
  60     /** An enum constant. */
  61     ENUM_CONSTANT,
  62     /**
  63      * A field not described by a more specific kind (like
  64      * {@code ENUM_CONSTANT}).
  65      */
  66     FIELD,
  67     /** A parameter of a method or constructor. */
  68     PARAMETER,
  69     /** A local variable. */
  70     LOCAL_VARIABLE,
  71     /** A parameter of an exception handler. */
  72     EXCEPTION_PARAMETER,
  73 
  74     // Executables
  75     /** A method. */
  76     METHOD,
  77     /** A constructor. */
  78     CONSTRUCTOR,
  79     /** A static initializer. */
  80     STATIC_INIT,
  81     /** An instance initializer. */
  82     INSTANCE_INIT,
  83 
  84     /** A type parameter. */
  85     TYPE_PARAMETER,
  86 
  87     /**
  88      * An implementation-reserved element.  This is not the element
  89      * you are looking for.
  90      */
  91     OTHER,
  92 
  93     /**
  94      * A resource variable.
  95      * @since 1.7
  96      */
  97      RESOURCE_VARIABLE,
  98 
  99     /**
 100      * A module.
 101      * @since 9
 102      * @spec JPMS
 103      */
 104      MODULE;
 105 
 106 
 107     /**
 108      * Returns {@code true} if this is a kind of class:
 109      * either {@code CLASS} or {@code ENUM}.
 110      *
 111      * @return {@code true} if this is a kind of class
 112      */
 113     public boolean isClass() {
 114         return this == CLASS || this == ENUM;
 115     }
 116 
 117     /**
 118      * Returns {@code true} if this is a kind of interface:
 119      * either {@code INTERFACE} or {@code ANNOTATION_TYPE}.
 120      *
 121      * @return {@code true} if this is a kind of interface
 122      */
 123     public boolean isInterface() {
 124         return this == INTERFACE || this == ANNOTATION_TYPE;
 125     }
 126 
 127     /**
 128      * Returns {@code true} if this is a kind of field:
 129      * either {@code FIELD} or {@code ENUM_CONSTANT}.
 130      *
 131      * @return {@code true} if this is a kind of field
 132      */
 133     public boolean isField() {
 134         return this == FIELD || this == ENUM_CONSTANT;
 135     }
 136 }