1 /*
2 * Copyright (c) 2014, 2024, 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
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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 *
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20 *
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24 */
25
26 import com.sun.tools.javac.comp.CodeReflectionTransformer;
27
28 /**
29 * Defines the implementation of the
30 * {@linkplain javax.tools.ToolProvider#getSystemJavaCompiler system Java compiler}
31 * and its command line equivalent, <em>{@index javac javac tool}</em>.
32 *
33 * <p>The {@code com.sun.source.*} packages provide the {@index "Compiler Tree API"}:
34 * an API for accessing the abstract trees (ASTs) representing Java source code
35 * and documentation comments, used by <em>javac</em>, <em>javadoc</em> and related tools.
36 *
37 * <h2 style="font-family:'DejaVu Sans Mono', monospace; font-style:italic">javac</h2>
38 *
39 * <p>
40 * This module provides the equivalent of command-line access to <em>javac</em>
41 * via the {@link java.util.spi.ToolProvider ToolProvider} and
42 * {@link javax.tools.Tool} service provider interfaces (SPIs),
43 * and more flexible access via the {@link javax.tools.JavaCompiler JavaCompiler}
44 * SPI.</p>
45 *
46 * <p> Instances of the tools can be obtained by calling
47 * {@link java.util.spi.ToolProvider#findFirst ToolProvider.findFirst}
48 * or the {@linkplain java.util.ServiceLoader service loader} with the name
49 * {@code "javac"}.
50 *
51 * <p>
52 * In addition, instances of {@link javax.tools.JavaCompiler.CompilationTask}
53 * obtained from {@linkplain javax.tools.JavaCompiler JavaCompiler} can be
54 * downcast to {@link com.sun.source.util.JavacTask JavacTask} for access to
55 * lower level aspects of <em>javac</em>, such as the
56 * {@link com.sun.source.tree Abstract Syntax Tree} (AST).</p>
57 *
58 * <p>This module uses the {@link java.nio.file.spi.FileSystemProvider
59 * FileSystemProvider} API to locate file system providers. In particular,
60 * this means that a jar file system provider, such as that in the
61 * {@code jdk.zipfs} module, must be available if the compiler is to be able
62 * to read JAR files.
63 *
64 * <h3>Options and Environment Variables</h3>
65 *
66 * The full set of options and environment variables supported by <em>javac</em>
67 * is given in the <a href="../../specs/man/javac.html"><em>javac Tool Guide</em></a>.
68 * However, there are some restrictions when the compiler is invoked through
69 * its API.
70 *
71 * <ul>
72 * <li><p>The {@code -J} option is not supported.
73 * Any necessary VM options must be set in the VM used to invoke the API.
74 * {@code IllegalArgumentException} will be thrown if the option
75 * is used when invoking the tool through the {@code JavaCompiler} API;
76 * an error will be reported if the option is used when invoking
77 * <em>javac</em> through the {@link java.util.spi.ToolProvider ToolProvider}
78 * or legacy {@link com.sun.tools.javac.Main Main} API.
79 *
80 * <li><p>The "classpath wildcard" feature is not supported.
81 * The feature is only supported by the native launcher.
82 * When invoking the tool through its API, all necessary jar
83 * files should be included directly in the {@code --class-path}
84 * option, or the {@code CLASSPATH} environment variable.
85 * When invoking the tool through its API, all components of the
86 * class path will be taken literally, and will be ignored if there
87 * is no matching directory or file. The {@code -Xlint:paths}
88 * option can be used to generate warnings about missing components.
89 *
90 * </ul>
91 *
92 * The following restrictions apply when invoking the compiler through
93 * the {@link JavaCompiler} interface.
94 *
95 * <ul>
96 * <li><p>Argument files (so-called @-files) are not supported.
97 * The content of any such files should be included directly
98 * in the list of options provided when invoking the tool
99 * though this API.
100 * {@code IllegalArgumentException} will be thrown if
101 * the option is used when invoking the tool through this API.
102 *
103 * <li><p>The environment variable {@code JDK_JAVAC_OPTIONS} is not supported.
104 * Any options defined in the environment variable should be included
105 * directly in the list of options provided when invoking the
106 * API; any values in the environment variable will be ignored.
107 *
108 * <li><p>Options that are just used to obtain information (such as
109 * {@code --help}, {@code --help-extended}, {@code --version} and
110 * {@code --full-version}) are not supported.
111 * {@link IllegalArgumentException} will be thrown if any of
112 * these options are used when invoking the tool through this API.
113 *
114 * <li>Path-related options depend on the file manager being used
115 * when calling {@link JavaCompiler#getTask}. The "standard"
116 * options, such as {@code --class-path}, {@code --module-path},
117 * and so on are available when using the default file manager,
118 * or one derived from it. These options may not be available
119 * and different options may be available, when using a different
120 * file manager.
121 * {@link IllegalArgumentException} will be thrown if any option
122 * that is unknown to the tool or the file manager is used when
123 * invoking the tool through this API.
124 * </ul>
125 *
126 * Note that the {@code CLASSPATH} environment variable <em>is</em> honored
127 * when invoking the compiler through its API, although such use is discouraged.
128 * An environment variable cannot be unset once a VM has been started,
129 * and so it is recommended to ensure that the environment variable is not set
130 * when starting a VM that will be used to invoke the compiler.
131 * However, if a value has been set, any such value can be overridden by
132 * using the {@code --class-path} option when invoking the compiler,
133 * or setting {@link StandardLocation#CLASS_PATH} in the file manager
134 * when invoking the compiler through the {@link JavaCompiler} interface.
135 *
136 * <h3>SuppressWarnings</h3>
137 *
138 * JLS {@jls 9.6.4.5} specifies a number of strings that can be used to
139 * suppress warnings that may be generated by a Java compiler.
140 *
141 * In addition, <em>javac</em> also supports other strings that can be used
142 * to suppress other kinds of warnings. The following table lists all the
143 * strings that can be used with {@code @SuppressWarnings}.
144 *
145 * <table class="striped">
146 * <caption>Strings supported by {@code SuppressWarnings}</caption>
147 * <thead>
148 * <tr><th>String<th>Suppress Warnings About ...
149 * </thead>
150 * <tbody>
151 * <tr><th scope="row">{@code auxiliaryclass} <td>an auxiliary class that is hidden in a source file, and is used
152 * from other files
153 * <tr><th scope="row">{@code cast} <td>use of unnecessary casts
154 * <tr><th scope="row">{@code classfile} <td>issues related to classfile contents
155 * <tr><th scope="row">{@code dangling-doc-comments} <td>issues related to "dangling" documentation comments,
156 * not attached to a declaration
157 * <tr><th scope="row">{@code deprecation} <td>use of deprecated items
158 * <tr><th scope="row">{@code dep-ann} <td>items marked as deprecated in a documentation comment but not
159 * using the {@code @Deprecated} annotation
160 * <tr><th scope="row">{@code divzero} <td>division by constant integer {@code 0}
161 * <tr><th scope="row">{@code empty} <td>empty statement after {@code if}
162 * <tr><th scope="row">{@code exports} <td>issues regarding module exports
163 * <tr><th scope="row">{@code fallthrough} <td>falling through from one case of a {@code switch} statement to
164 * the next
165 * <tr><th scope="row">{@code finally} <td>{@code finally} clauses that do not terminate normally
166 * <tr><th scope="row">{@code incubating} <td>use of incubating modules
167 * <tr><th scope="row">{@code lossy-conversions} <td>possible lossy conversions in compound assignment
168 * <tr><th scope="row">{@code missing-explicit-ctor} <td>missing explicit constructors in public and protected classes
169 * in exported packages
170 * <tr><th scope="row">{@code module} <td>module system related issues
171 * <tr><th scope="row">{@code opens} <td>issues regarding module opens
172 * <tr><th scope="row">{@code overloads} <td>issues regarding method overloads
173 * <tr><th scope="row">{@code overrides} <td>issues regarding method overrides
174 * <tr><th scope="row">{@code path} <td>invalid path elements on the command line
175 * <tr><th scope="row">{@code preview} <td>use of preview language features
176 * <tr><th scope="row">{@code rawtypes} <td>use of raw types
177 * <tr><th scope="row">{@code removal} <td>use of API that has been marked for removal
178 * <tr><th scope="row">{@code restricted} <td>use of restricted methods
179 * <tr><th scope="row">{@code requires-automatic} <td>use of automatic modules in the {@code requires} clauses
180 * <tr><th scope="row">{@code requires-transitive-automatic} <td>automatic modules in {@code requires transitive}
181 * <tr><th scope="row">{@code serial} <td>{@link java.base/java.io.Serializable Serializable} classes
182 * that do not have a {@code serialVersionUID} field, or other
183 * suspect declarations in {@code Serializable} and
184 * {@link java.base/java.io.Externalizable Externalizable} classes
185 * and interfaces
186 * <tr><th scope="row">{@code static} <td>accessing a static member using an instance
187 * <tr><th scope="row">{@code strictfp} <td>unnecessary use of the {@code strictfp} modifier
188 * <tr><th scope="row">{@code synchronization} <td>synchronization attempts on instances of value-based classes
189 * <tr><th scope="row">{@code text-blocks} <td>inconsistent white space characters in text block indentation
190 * <tr><th scope="row">{@code this-escape} <td>superclass constructor leaking {@code this} before subclass initialized
191 * <tr><th scope="row">{@code try} <td>issues relating to use of {@code try} blocks
192 * (that is, try-with-resources)
193 * <tr><th scope="row">{@code unchecked} <td>unchecked operations
194 * <tr><th scope="row">{@code varargs} <td>potentially unsafe vararg methods
195 * <tr><th scope="row">{@code doclint:accessibility} <td>accessibility issues found in documentation comments
196 * <tr><th scope="row">{@code doclint:all} <td>all issues found in documentation comments
197 * <tr><th scope="row">{@code doclint:html} <td>HTML issues found in documentation comments
198 * <tr><th scope="row">{@code doclint:missing} <td>missing items in documentation comments
199 * <tr><th scope="row">{@code doclint:reference} <td>reference issues found in documentation comments
200 * <tr><th scope="row">{@code doclint:syntax} <td>syntax issues found in documentation comments
201 * </tbody>
202 * </table>
203 *
204 * @toolGuide javac
205 *
206 * @provides java.util.spi.ToolProvider
207 * Use {@link java.util.spi.ToolProvider#findFirst ToolProvider.findFirst("javac")}
208 * to obtain an instance of a {@code ToolProvider} that provides the equivalent
209 * of command-line access to the {@code javac} tool.
210 * @provides com.sun.tools.javac.platform.PlatformProvider
211 * @provides javax.tools.JavaCompiler
212 * @provides javax.tools.Tool
213 *
214 * @uses javax.annotation.processing.Processor
215 * @uses com.sun.source.util.Plugin
216 * @uses com.sun.tools.javac.platform.PlatformProvider
217 *
218 * @moduleGraph
219 * @since 9
220 */
221 module jdk.compiler {
222 requires transitive java.compiler;
223 requires jdk.internal.opt;
224 requires jdk.zipfs;
225
226 exports com.sun.source.doctree;
227 exports com.sun.source.tree;
228 exports com.sun.source.util;
229 exports com.sun.tools.javac;
230
231 exports com.sun.tools.doclint to
232 jdk.javadoc;
233 exports com.sun.tools.javac.api to
234 jdk.javadoc,
235 jdk.jshell,
236 jdk.internal.md,
237 jdk.incubator.code;
238 exports com.sun.tools.javac.resources to
239 jdk.jshell;
240 exports com.sun.tools.javac.code to
241 jdk.javadoc,
242 jdk.jshell,
243 jdk.incubator.code;
244 exports com.sun.tools.javac.comp to
245 jdk.javadoc,
246 jdk.jshell,
247 jdk.incubator.code;
248 exports com.sun.tools.javac.file to
249 jdk.jdeps,
250 jdk.javadoc;
251 exports com.sun.tools.javac.jvm to
252 jdk.javadoc,
253 jdk.incubator.code;
254 exports com.sun.tools.javac.main to
255 jdk.javadoc,
256 jdk.jshell,
257 jdk.incubator.code;
258 exports com.sun.tools.javac.model to
259 jdk.javadoc,
260 jdk.incubator.code;
261 exports com.sun.tools.javac.parser to
262 jdk.jshell,
263 jdk.internal.md;
264 exports com.sun.tools.javac.platform to
265 jdk.jdeps,
266 jdk.javadoc;
267 exports com.sun.tools.javac.tree to
268 jdk.javadoc,
269 jdk.jshell,
270 jdk.internal.md,
271 jdk.incubator.code;
272 exports com.sun.tools.javac.util to
273 jdk.jdeps,
274 jdk.javadoc,
275 jdk.jshell,
276 jdk.internal.md,
277 jdk.incubator.code;
278 exports com.sun.tools.javac.processing to
279 jdk.incubator.code;
280
281 uses javax.annotation.processing.Processor;
282 uses com.sun.source.util.Plugin;
283 uses com.sun.tools.doclint.DocLint;
284 uses com.sun.tools.javac.platform.PlatformProvider;
285 uses com.sun.tools.javac.api.JavacTrees.DocCommentTreeTransformer;
286 uses CodeReflectionTransformer;
287
288 provides java.util.spi.ToolProvider with
289 com.sun.tools.javac.main.JavacToolProvider;
290
291 provides com.sun.tools.javac.platform.PlatformProvider with
292 com.sun.tools.javac.platform.JDKPlatformProvider;
293
294 provides javax.tools.JavaCompiler with
295 com.sun.tools.javac.api.JavacTool;
296
297 provides javax.tools.Tool with
298 com.sun.tools.javac.api.JavacTool;
299 }
300