src/share/classes/com/sun/tools/doclets/internal/toolkit/taglets/ThrowsTaglet.java

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1 /*
2 * Copyright (c) 2001, 2013, 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 com.sun.tools.doclets.internal.toolkit.taglets;
27
28 import java.util.*;
29
30 import com.sun.javadoc.*;
31 import com.sun.tools.doclets.internal.toolkit.Content;
32 import com.sun.tools.doclets.internal.toolkit.util.*;
33
34 /**
35 * A taglet that represents the @throws tag.
36 *
37 * <p><b>This is NOT part of any supported API.
38 * If you write code that depends on this, you do so at your own risk.
39 * This code and its internal interfaces are subject to change or
40 * deletion without notice.</b>
41 *
42 * @author Jamie Ho
43 * @since 1.4
44 */
45 public class ThrowsTaglet extends BaseExecutableMemberTaglet
46 implements InheritableTaglet {
47
48 public ThrowsTaglet() {
49 name = "throws";
50 }
51
52 /**
53 * {@inheritDoc}
54 */
55 public void inherit(DocFinder.Input input, DocFinder.Output output) {
56 ClassDoc exception;
57 if (input.tagId == null) {
58 ThrowsTag throwsTag = (ThrowsTag) input.tag;
59 exception = throwsTag.exception();
60 input.tagId = exception == null ?
61 throwsTag.exceptionName() :
62 throwsTag.exception().qualifiedName();
63 } else {
64 exception = input.element.containingClass().findClass(input.tagId);
65 }
66
67 ThrowsTag[] tags = ((MethodDoc)input.element).throwsTags();
68 for (int i = 0; i < tags.length; i++) {
69 if (input.tagId.equals(tags[i].exceptionName()) ||
70 (tags[i].exception() != null &&
71 (input.tagId.equals(tags[i].exception().qualifiedName())))) {
72 output.holder = input.element;
73 output.holderTag = tags[i];
74 output.inlineTags = input.isFirstSentence ?
75 tags[i].firstSentenceTags() : tags[i].inlineTags();
76 output.tagList.add(tags[i]);
77 } else if (exception != null && tags[i].exception() != null &&
78 tags[i].exception().subclassOf(exception)) {
79 output.tagList.add(tags[i]);
80 }
81 }
82 }
83
84 /**
85 * Add links for exceptions that are declared but not documented.
86 */
87 private Content linkToUndocumentedDeclaredExceptions(
88 Type[] declaredExceptionTypes, Set<String> alreadyDocumented,
89 TagletWriter writer) {
90 Content result = writer.getOutputInstance();
91 //Add links to the exceptions declared but not documented.
92 for (int i = 0; i < declaredExceptionTypes.length; i++) {
93 if (declaredExceptionTypes[i].asClassDoc() != null &&
94 ! alreadyDocumented.contains(
95 declaredExceptionTypes[i].asClassDoc().name()) &&
96 ! alreadyDocumented.contains(
97 declaredExceptionTypes[i].asClassDoc().qualifiedName())) {
98 if (alreadyDocumented.size() == 0) {
99 result.addContent(writer.getThrowsHeader());
100 }
101 result.addContent(writer.throwsTagOutput(declaredExceptionTypes[i]));
102 alreadyDocumented.add(declaredExceptionTypes[i].asClassDoc().name());
103 }
104 }
105 return result;
106 }
107
108 /**
109 * Inherit throws documentation for exceptions that were declared but not
110 * documented.
111 */
112 private Content inheritThrowsDocumentation(Doc holder,
113 Type[] declaredExceptionTypes, Set<String> alreadyDocumented,
114 TagletWriter writer) {
115 Content result = writer.getOutputInstance();
116 if (holder instanceof MethodDoc) {
117 Set<Tag> declaredExceptionTags = new LinkedHashSet<Tag>();
118 for (int j = 0; j < declaredExceptionTypes.length; j++) {
119 DocFinder.Output inheritedDoc =
120 DocFinder.search(new DocFinder.Input((MethodDoc) holder, this,
121 declaredExceptionTypes[j].typeName()));
122 if (inheritedDoc.tagList.size() == 0) {
123 inheritedDoc = DocFinder.search(new DocFinder.Input(
124 (MethodDoc) holder, this,
125 declaredExceptionTypes[j].qualifiedTypeName()));
126 }
127 declaredExceptionTags.addAll(inheritedDoc.tagList);
128 }
129 result.addContent(throwsTagsOutput(
130 declaredExceptionTags.toArray(new ThrowsTag[] {}),
131 writer, alreadyDocumented, false));
132 }
133 return result;
134 }
135
136 /**
137 * {@inheritDoc}
138 */
139 public Content getTagletOutput(Doc holder, TagletWriter writer) {
140 ExecutableMemberDoc execHolder = (ExecutableMemberDoc) holder;
141 ThrowsTag[] tags = execHolder.throwsTags();
142 Content result = writer.getOutputInstance();
143 HashSet<String> alreadyDocumented = new HashSet<String>();
144 if (tags.length > 0) {
145 result.addContent(throwsTagsOutput(
146 execHolder.throwsTags(), writer, alreadyDocumented, true));
147 }
148 result.addContent(inheritThrowsDocumentation(holder,
149 execHolder.thrownExceptionTypes(), alreadyDocumented, writer));
150 result.addContent(linkToUndocumentedDeclaredExceptions(
151 execHolder.thrownExceptionTypes(), alreadyDocumented, writer));
152 return result;
153 }
154
155
156 /**
157 * Given an array of <code>Tag</code>s representing this custom
158 * tag, return its string representation.
159 * @param throwTags the array of <code>ThrowsTag</code>s to convert.
160 * @param writer the TagletWriter that will write this tag.
161 * @param alreadyDocumented the set of exceptions that have already
162 * been documented.
163 * @param allowDups True if we allow duplicate throws tags to be documented.
164 * @return the Content representation of this <code>Tag</code>.
165 */
166 protected Content throwsTagsOutput(ThrowsTag[] throwTags,
167 TagletWriter writer, Set<String> alreadyDocumented, boolean allowDups) {
168 Content result = writer.getOutputInstance();
169 if (throwTags.length > 0) {
170 for (int i = 0; i < throwTags.length; ++i) {
171 ThrowsTag tt = throwTags[i];
172 ClassDoc cd = tt.exception();
173 if ((!allowDups) && (alreadyDocumented.contains(tt.exceptionName()) ||
174 (cd != null && alreadyDocumented.contains(cd.qualifiedName())))) {
175 continue;
176 }
177 if (alreadyDocumented.size() == 0) {
178 result.addContent(writer.getThrowsHeader());
179 }
180 result.addContent(writer.throwsTagOutput(tt));
181 alreadyDocumented.add(cd != null ?
182 cd.qualifiedName() : tt.exceptionName());
183 }
184 }
185 return result;
186 }
187 }

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