DocTree.java revision 3193:3b3bea483542 
1/*
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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 *
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24 */
25
26package com.sun.source.doctree;
27
28/**
29 * Common interface for all nodes in a documentation syntax tree.
30 *
31 * @since 1.8
32 */
33public interface DocTree {
34    /**
35     * Enumerates all kinds of trees.
36     */
37    enum Kind {
38        /**
39         * Used for instances of {@link AttributeTree}
40         * representing an HTML attribute.
41         */
42        ATTRIBUTE,
43
44        /**
45         * Used for instances of {@link AuthorTree}
46         * representing an @author tag.
47         */
48        AUTHOR("author"),
49
50        /**
51         * Used for instances of {@link LiteralTree}
52         * representing an @code tag.
53         */
54        CODE("code"),
55
56        /**
57         * Used for instances of {@link CommentTree}
58         * representing an HTML comment.
59         */
60        COMMENT,
61
62        /**
63         * Used for instances of {@link DeprecatedTree}
64         * representing an @deprecated tag.
65         */
66        DEPRECATED("deprecated"),
67
68        /**
69         * Used for instances of {@link DocCommentTree}
70         * representing a complete doc comment.
71         */
72        DOC_COMMENT,
73
74        /**
75         * Used for instances of {@link DocRootTree}
76         * representing an @docRoot tag.
77         */
78        DOC_ROOT("docRoot"),
79
80        /**
81         * Used for instances of {@link EndElementTree}
82         * representing the end of an HTML element.
83         */
84        END_ELEMENT,
85
86        /**
87         * Used for instances of {@link EntityTree}
88         * representing an HTML entity.
89         */
90        ENTITY,
91
92        /**
93         * Used for instances of {@link ErroneousTree}
94         * representing some invalid text.
95         */
96        ERRONEOUS,
97
98        /**
99         * Used for instances of {@link ThrowsTree}
100         * representing an @exception tag.
101         */
102        EXCEPTION("exception"),
103
104        /**
105         * Used for instances of {@link IdentifierTree}
106         * representing an identifier.
107         */
108        IDENTIFIER,
109
110        /**
111         * Used for instances of {@index term optional-descr}
112         * representing a search term.
113         */
114        INDEX("index"),
115
116        /**
117         * Used for instances of {@link InheritDocTree}
118         * representing an @inheritDoc tag.
119         */
120        INHERIT_DOC("inheritDoc"),
121
122        /**
123         * Used for instances of {@link LinkTree}
124         * representing an @link tag.
125         */
126        LINK("link"),
127
128        /**
129         * Used for instances of {@link LinkTree}
130         * representing an @linkplain tag.
131         */
132        LINK_PLAIN("linkplain"),
133
134        /**
135         * Used for instances of {@link LiteralTree}
136         * representing an @literal tag.
137         */
138        LITERAL("literal"),
139
140        /**
141         * Used for instances of {@link ParamTree}
142         * representing an @param tag.
143         */
144        PARAM("param"),
145
146        /**
147         * Used for instances of {@link ReferenceTree}
148         * representing a reference to a element in the
149         * Java programming language.
150         */
151        REFERENCE,
152
153        /**
154         * Used for instances of {@link ReturnTree}
155         * representing an @return tag.
156         */
157        RETURN("return"),
158
159        /**
160         * Used for instances of {@link SeeTree}
161         * representing an @see tag.
162         */
163        SEE("see"),
164
165        /**
166         * Used for instances of {@link SerialTree}
167         * representing an @serial tag.
168         */
169        SERIAL("serial"),
170
171        /**
172         * Used for instances of {@link SerialDataTree}
173         * representing an @serialData tag.
174         */
175        SERIAL_DATA("serialData"),
176
177        /**
178         * Used for instances of {@link SerialFieldTree}
179         * representing an @serialField tag.
180         */
181        SERIAL_FIELD("serialField"),
182
183        /**
184         * Used for instances of {@link SinceTree}
185         * representing an @since tag.
186         */
187        SINCE("since"),
188
189        /**
190         * Used for instances of {@link EndElementTree}
191         * representing the start of an HTML element.
192         */
193        START_ELEMENT,
194
195        /**
196         * Used for instances of {@link TextTree}
197         * representing some documentation text.
198         */
199        TEXT,
200
201        /**
202         * Used for instances of {@link ThrowsTree}
203         * representing an @throws tag.
204         */
205        THROWS("throws"),
206
207        /**
208         * Used for instances of {@link UnknownBlockTagTree}
209         * representing an unknown block tag.
210         */
211        UNKNOWN_BLOCK_TAG,
212
213        /**
214         * Used for instances of {@link UnknownInlineTagTree}
215         * representing an unknown inline tag.
216         */
217        UNKNOWN_INLINE_TAG,
218
219        /**
220         * Used for instances of {@link ValueTree}
221         * representing an @value tag.
222         */
223        VALUE("value"),
224
225        /**
226         * Used for instances of {@link VersionTree}
227         * representing an @version tag.
228         */
229        VERSION("version"),
230
231        /**
232         * An implementation-reserved node. This is the not the node
233         * you are looking for.
234         */
235        OTHER;
236
237        /**
238         * The name of the tag, if any, associated with this kind of node.
239         */
240        public final String tagName;
241
242        Kind() {
243            tagName = null;
244        }
245
246        Kind(String tagName) {
247            this.tagName = tagName;
248        }
249    }
250
251    /**
252     * Returns the kind of this tree.
253     *
254     * @return the kind of this tree.
255     */
256    Kind getKind();
257
258    /**
259     * Accept method used to implement the visitor pattern.  The
260     * visitor pattern is used to implement operations on trees.
261     *
262     * @param <R> result type of this operation.
263     * @param <D> type of additional data.
264     * @param visitor the visitor to be called
265     * @param data a parameter value to be passed to the visitor method
266     * @return the value returned from the visitor method
267     */
268    <R, D> R accept(DocTreeVisitor<R,D> visitor, D data);
269}
270