API Overview API Index Package Overview Direct link to this page
JDK 1.6
  javax.tools. JavaCompiler View Javadoc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311

/*
 * @(#)JavaCompiler.java	1.15 06/09/25
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.tools;

import java.io.File;
import java.io.InputStream;
import java.io.Writer;
import java.nio.charset.Charset;
import java.util.List;
import java.util.Locale;
import java.util.concurrent.Callable;
import javax.annotation.processing.Processor;

/**
 * Interface to invoke Java™ programming language compilers from
 * programs.
 *
 * <p>The compiler might generate diagnostics during compilation (for
 * example, error messages).  If a diagnostic listener is provided,
 * the diagnostics will be supplied to the listener.  If no listener
 * is provided, the diagnostics will be formatted in an unspecified
 * format and written to the default output, which is {@code
 * System.err} unless otherwise specified.  Even if a diagnostic
 * listener is supplied, some diagnostics might not fit in a {@code
 * Diagnostic} and will be written to the default output.
 *
 * <p>A compiler tool has an associated standard file manager, which
 * is the file manager that is native to the tool (or built-in).  The
 * standard file manager can be obtained by calling {@linkplain
 * #getStandardFileManager getStandardFileManager}.
 *
 * <p>A compiler tool must function with any file manager as long as
 * any additional requirements as detailed in the methods below are
 * met.  If no file manager is provided, the compiler tool will use a
 * standard file manager such as the one returned by {@linkplain
 * #getStandardFileManager getStandardFileManager}.
 *
 * <p>An instance implementing this interface must conform to the Java
 * Language Specification and generate class files conforming to the
 * Java Virtual Machine specification.  The versions of these
 * specifications are defined in the {@linkplain Tool} interface.  
 *
 * Additionally, an instance of this interface supporting {@link
 * javax.lang.model.SourceVersion#RELEASE_6 SourceVersion.RELEASE_6}
 * or higher must also support {@linkplain javax.annotation.processing
 * annotation processing}.
 *
 * <p>The compiler relies on two services: {@linkplain
 * DiagnosticListener diagnostic listener} and {@linkplain
 * JavaFileManager file manager}.  Although most classes and
 * interfaces in this package defines an API for compilers (and
 * tools in general) the interfaces {@linkplain DiagnosticListener},
 * {@linkplain JavaFileManager}, {@linkplain FileObject}, and
 * {@linkplain JavaFileObject} are not intended to be used in
 * applications.  Instead these interfaces are intended to be
 * implemented and used to provide customized services for a
 * compiler and thus defines an SPI for compilers.
 *
 * <p>There are a number of classes and interfaces in this package
 * which are designed to ease the implementation of the SPI to
 * customize the behavior of a compiler:
 *
 * <dl>
 *   <dt>{@link StandardJavaFileManager}</dt>
 *   <dd>
 *
 *     Every compiler which implements this interface provides a
 *     standard file manager for operating on regular {@linkplain
 *     java.io.File files}.  The StandardJavaFileManager interface
 *     defines additional methods for creating file objects from
 *     regular files.
 *
 *     <p>The standard file manager serves two purposes:
 *
 *     <ul>
 *       <li>basic building block for customizing how a compiler reads
 *       and writes files</li>
 *       <li>sharing between multiple compilation tasks</li>
 *     </ul>
 *
 *     <p>Reusing a file manager can potentially reduce overhead of
 *     scanning the file system and reading jar files.  Although there
 *     might be no reduction in overhead, a standard file manager must
 *     work with multiple sequential compilations making the following
 *     example a recommended coding pattern:
 *
 *     <pre>
 *       Files[] files1 = ... ; // input for first compilation task
 *       Files[] files2 = ... ; // input for second compilation task
 *
 *       JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
 *       StandardJavaFileManager fileManager = compiler.getStandardFileManager(null, null, null);
 *
 *       {@code Iterable<? extends JavaFileObject>} compilationUnits1 =
 *           fileManager.getJavaFileObjectsFromFiles({@linkplain java.util.Arrays#asList Arrays.asList}(files1));
 *       compiler.getTask(null, fileManager, null, null, null, compilationUnits1).call();
 *
 *       {@code Iterable<? extends JavaFileObject>} compilationUnits2 =
 *           fileManager.getJavaFileObjects(files2); // use alternative method
 *       // reuse the same file manager to allow caching of jar files
 *       compiler.getTask(null, fileManager, null, null, null, compilationUnits2).call();
 *
 *       fileManager.close();</pre>
 *
 *   </dd>
 *
 *   <dt>{@link DiagnosticCollector}</dt>
 *   <dd>
 *     Used to collect diagnostics in a list, for example:
 *     <pre>
 *       {@code Iterable<? extends JavaFileObject>} compilationUnits = ...;
 *       JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
 *       {@code DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<JavaFileObject>();}
 *       StandardJavaFileManager fileManager = compiler.getStandardFileManager(diagnostics, null, null);
 *       compiler.getTask(null, fileManager, diagnostics, null, null, compilationUnits).call();
 *
 *       for (Diagnostic diagnostic : diagnostics.getDiagnostics())
 *           System.out.format("Error on line %d in %d%n",
 *                             diagnostic.getLineNumber()
 *                             diagnostic.getSource().toUri());
 *
 *       fileManager.close();</pre>
 *   </dd>
 *
 *   <dt>
 *     {@link ForwardingJavaFileManager}, {@link ForwardingFileObject}, and
 *     {@link ForwardingJavaFileObject}
 *   </dt>
 *   <dd>
 *
 *     Subclassing is not available for overriding the behavior of a
 *     standard file manager as it is created by calling a method on a
 *     compiler, not by invoking a constructor.  Instead forwarding
 *     (or delegation) should be used.  These classes makes it easy to
 *     forward most calls to a given file manager or file object while
 *     allowing customizing behavior.  For example, consider how to
 *     log all calls to {@linkplain JavaFileManager#flush}:
 *
 *     <pre>
 *       final {@linkplain java.util.logging.Logger Logger} logger = ...;
 *       {@code Iterable<? extends JavaFileObject>} compilationUnits = ...;
 *       JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
 *       StandardJavaFileManager stdFileManager = compiler.getStandardFileManager(null, null, null);
 *       JavaFileManager fileManager = new ForwardingJavaFileManager(stdFileManager) {
 *           public void flush() {
 *               logger.entering(StandardJavaFileManager.class.getName(), "flush");
 *               super.flush();
 *               logger.exiting(StandardJavaFileManager.class.getName(), "flush");
 *           }
 *       };
 *       compiler.getTask(null, fileManager, null, null, null, compilationUnits).call();</pre>
 *   </dd>
 *
 *   <dt>{@link SimpleJavaFileObject}</dt>
 *   <dd>
 *
 *     This class provides a basic file object implementation which
 *     can be used as building block for creating file objects.  For
 *     example, here is how to define a file object which represent
 *     source code stored in a string:
 *
 *     <pre>
 *       /**
 *        * A file object used to represent source coming from a string.
 *        {@code *}/
 *       public class JavaSourceFromString extends SimpleJavaFileObject {
 *           /**
 *            * The source code of this "file".
 *            {@code *}/
 *           final String code;
 *
 *           /**
 *            * Constructs a new JavaSourceFromString.
 *            * {@code @}param name the name of the compilation unit represented by this file object
 *            * {@code @}param code the source code for the compilation unit represented by this file object
 *            {@code *}/
 *           JavaSourceFromString(String name, String code) {
 *               super({@linkplain java.net.URI#create URI.create}("string:///" + name.replace('.','/') + Kind.SOURCE.extension),
 *                     Kind.SOURCE);
 *               this.code = code;
 *           }
 *
 *           {@code @}Override
 *           public CharSequence getCharContent(boolean ignoreEncodingErrors) {
 *               return code;
 *           }
 *       }</pre>
 *   </dd>
 * </dl>
 *
 * @author Peter von der Ah&eacute;
 * @author Jonathan Gibbons
 * @see DiagnosticListener
 * @see Diagnostic
 * @see JavaFileManager
 * @since 1.6
 */
public interface JavaCompiler extends Tool, OptionChecker {

    /**
     * Creates a future for a compilation task with the given
     * components and arguments.  The compilation might not have
     * completed as described in the CompilationTask interface.
     *
     * <p>If a file manager is provided, it must be able to handle all
     * locations defined in {@link StandardLocation}.
     *
     * @param out a Writer for additional output from the compiler;
     * use {@code System.err} if {@code null}
     * @param fileManager a file manager; if {@code null} use the
     * compiler's standard filemanager
     * @param diagnosticListener a diagnostic listener; if {@code
     * null} use the compiler's default method for reporting
     * diagnostics
     * @param options compiler options, {@code null} means no options
     * @param classes class names (for annotation processing), {@code
     * null} means no class names
     * @param compilationUnits the compilation units to compile, {@code
     * null} means no compilation units
     * @return an object representing the compilation
     * @throws RuntimeException if an unrecoverable error
     * occurred in a user supplied component.  The
     * {@linkplain Throwable#getCause() cause} will be the error in
     * user code.
     * @throws IllegalArgumentException if any of the given
     * compilation units are of other kind than
     * {@linkplain JavaFileObject.Kind#SOURCE source}
     */
    CompilationTask getTask(Writer out,
                            JavaFileManager fileManager,
                            DiagnosticListener<? super JavaFileObject> diagnosticListener,
                            Iterable<String> options,
                            Iterable<String> classes,
                            Iterable<? extends JavaFileObject> compilationUnits);

    /**
     * Gets a new instance of the standard file manager implementation
     * for this tool.  The file manager will use the given diagnostic
     * listener for producing any non-fatal diagnostics.  Fatal errors
     * will be signalled with the appropriate exceptions.
     *
     * <p>The standard file manager will be automatically reopened if
     * it is accessed after calls to {@code flush} or {@code close}.
     * The standard file manager must be usable with other tools.
     *
     * @param diagnosticListener a diagnostic listener for non-fatal
     * diagnostics; if {@code null} use the compiler's default method
     * for reporting diagnostics
     * @param locale the locale to apply when formatting diagnostics;
     * {@code null} means the {@linkplain Locale#getDefault() default locale}.
     * @param charset the character set used for decoding bytes; if
     * {@code null} use the platform default
     * @return the standard file manager
     */
    StandardJavaFileManager getStandardFileManager(
        DiagnosticListener<? super JavaFileObject> diagnosticListener,
        Locale locale,
        Charset charset);

    /**
     * Interface representing a future for a compilation task.  The
     * compilation task has not yet started.  To start the task, call
     * the {@linkplain #call call} method.
     *
     * <p>Before calling the call method, additional aspects of the
     * task can be configured, for example, by calling the
     * {@linkplain #setProcessors setProcessors} method.
     */
    interface CompilationTask extends Callable<Boolean> {

        /**
         * Sets processors (for annotation processing).  This will
         * bypass the normal discovery mechanism.
         *
         * @param processors processors (for annotation processing)
         * @throws IllegalStateException if the task has started
         */
        void setProcessors(Iterable<? extends Processor> processors);

        /**
         * Set the locale to be applied when formatting diagnostics and
         * other localized data.
         *
         * @param locale the locale to apply; {@code null} means apply no
         * locale
         * @throws IllegalStateException if the task has started
         */
        void setLocale(Locale locale);

        /**
         * Performs this compilation task.  The compilation may only
         * be performed once.  Subsequent calls to this method throw
         * IllegalStateException.
         *
         * @return true if and only all the files compiled without errors;
         * false otherwise
         *
         * @throws RuntimeException if an unrecoverable error occurred
         * in a user-supplied component.  The
         * {@linkplain Throwable#getCause() cause} will be the error
         * in user code.
         * @throws IllegalStateException if called more than once
         */
        Boolean call();
    }
}

Generated By: JavaOnTracks Doclet 0.1.4     ©Thibaut Colar