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