Thu, 30 Jul 2009 10:29:53 +0100
6827648: Extremely slow compilation time for visitor pattern code + generics
Summary: Javac unnecessarily recomputates type-substitutions multiple times
Reviewed-by: jjg
1 /*
2 * Copyright 2004 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
26 package com.sun.tools.apt;
28 import java.io.PrintWriter;
29 import com.sun.mirror.apt.AnnotationProcessorFactory;
31 /**
32 * The main program for the command-line tool apt.
33 *
34 * <p>Nothing described in this source file is part of any supported
35 * API. If you write code that depends on this, you do so at your own
36 * risk. This code and its internal interfaces are subject to change
37 * or deletion without notice.
38 */
39 public class Main {
41 static {
42 ClassLoader loader = Main.class.getClassLoader();
43 if (loader != null)
44 loader.setPackageAssertionStatus("com.sun.tools.apt", true);
45 }
47 /** Command line interface. If args is <tt>null</tt>, a
48 * <tt>NullPointerException</tt> is thrown.
49 * @param args The command line parameters.
50 */
51 public static void main(String... args) {
52 System.exit(process(args));
53 }
55 /** Programatic interface. If args is <tt>null</tt>, a
56 * <tt>NullPointerException</tt> is thrown.
57 * Output is directed to <tt>System.err</tt>.
58 * @param args The command line parameters.
59 */
60 public static int process(String... args) {
61 return processing(null, null, args);
62 }
64 /** Programmatic interface. If any argument
65 * is <tt>null</tt>, a <tt>NullPointerException</tt> is thrown.
66 * @param args The command line parameters.
67 * @param out Where the tool's output is directed.
68 */
69 public static int process(PrintWriter out, String... args) {
70 if (out == null)
71 throw new NullPointerException("Parameter out cannot be null.");
72 return processing(null, out, args);
73 }
75 /** Programmatic interface. If <tt>factory</tt> or <tt>args</tt>
76 * is <tt>null</tt>, a <tt>NullPointerException</tt> is thrown.
77 * The "<tt>-factory</tt>" and "<tt>-factorypath</tt>"
78 * command line parameters are ignored by this entry point.
79 * Output is directed to <tt>System.err</tt>.
80 *
81 * @param factory The annotation processor factory to use
82 * @param args The command line parameters.
83 */
84 public static int process(AnnotationProcessorFactory factory, String... args) {
85 return process(factory, new PrintWriter(System.err, true), args);
86 }
88 /** Programmatic interface. If any argument
89 * is <tt>null</tt>, a <tt>NullPointerException</tt> is thrown.
90 * The "<tt>-factory</tt>" and "<tt>-factorypath</tt>"
91 * command line parameters are ignored by this entry point.
92 *
93 * @param factory The annotation processor factory to use
94 * @param args The command line parameters.
95 * @param out Where the tool's output is directed.
96 */
97 public static int process(AnnotationProcessorFactory factory, PrintWriter out,
98 String... args) {
99 if (out == null)
100 throw new NullPointerException("Parameter out cannot be null.");
101 if (factory == null)
102 throw new NullPointerException("Parameter factory cannot be null");
103 return processing(factory, out, args);
104 }
106 private static int processing(AnnotationProcessorFactory factory,
107 PrintWriter out,
108 String... args) {
109 if (out == null)
110 out = new PrintWriter(System.err, true);
111 com.sun.tools.apt.main.Main compiler =
112 new com.sun.tools.apt.main.Main("apt", out);
113 return compiler.compile(args, factory);
114 }
115 }