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
duke@1 | 1 | /* |
duke@1 | 2 | * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved. |
duke@1 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@1 | 4 | * |
duke@1 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@1 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@1 | 7 | * published by the Free Software Foundation. Sun designates this |
duke@1 | 8 | * particular file as subject to the "Classpath" exception as provided |
duke@1 | 9 | * by Sun in the LICENSE file that accompanied this code. |
duke@1 | 10 | * |
duke@1 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@1 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@1 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@1 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@1 | 15 | * accompanied this code). |
duke@1 | 16 | * |
duke@1 | 17 | * You should have received a copy of the GNU General Public License version |
duke@1 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@1 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@1 | 20 | * |
duke@1 | 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@1 | 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@1 | 23 | * have any questions. |
duke@1 | 24 | */ |
duke@1 | 25 | |
duke@1 | 26 | package com.sun.tools.apt; |
duke@1 | 27 | |
duke@1 | 28 | import java.io.PrintWriter; |
duke@1 | 29 | import com.sun.mirror.apt.AnnotationProcessorFactory; |
duke@1 | 30 | |
duke@1 | 31 | /** |
duke@1 | 32 | * The main program for the command-line tool apt. |
duke@1 | 33 | * |
duke@1 | 34 | * <p>Nothing described in this source file is part of any supported |
duke@1 | 35 | * API. If you write code that depends on this, you do so at your own |
duke@1 | 36 | * risk. This code and its internal interfaces are subject to change |
duke@1 | 37 | * or deletion without notice. |
duke@1 | 38 | */ |
duke@1 | 39 | public class Main { |
duke@1 | 40 | |
duke@1 | 41 | static { |
duke@1 | 42 | ClassLoader loader = Main.class.getClassLoader(); |
duke@1 | 43 | if (loader != null) |
duke@1 | 44 | loader.setPackageAssertionStatus("com.sun.tools.apt", true); |
duke@1 | 45 | } |
duke@1 | 46 | |
duke@1 | 47 | /** Command line interface. If args is <tt>null</tt>, a |
duke@1 | 48 | * <tt>NullPointerException</tt> is thrown. |
duke@1 | 49 | * @param args The command line parameters. |
duke@1 | 50 | */ |
duke@1 | 51 | public static void main(String... args) { |
duke@1 | 52 | System.exit(process(args)); |
duke@1 | 53 | } |
duke@1 | 54 | |
duke@1 | 55 | /** Programatic interface. If args is <tt>null</tt>, a |
duke@1 | 56 | * <tt>NullPointerException</tt> is thrown. |
duke@1 | 57 | * Output is directed to <tt>System.err</tt>. |
duke@1 | 58 | * @param args The command line parameters. |
duke@1 | 59 | */ |
duke@1 | 60 | public static int process(String... args) { |
duke@1 | 61 | return processing(null, null, args); |
duke@1 | 62 | } |
duke@1 | 63 | |
duke@1 | 64 | /** Programmatic interface. If any argument |
duke@1 | 65 | * is <tt>null</tt>, a <tt>NullPointerException</tt> is thrown. |
duke@1 | 66 | * @param args The command line parameters. |
duke@1 | 67 | * @param out Where the tool's output is directed. |
duke@1 | 68 | */ |
duke@1 | 69 | public static int process(PrintWriter out, String... args) { |
duke@1 | 70 | if (out == null) |
duke@1 | 71 | throw new NullPointerException("Parameter out cannot be null."); |
duke@1 | 72 | return processing(null, out, args); |
duke@1 | 73 | } |
duke@1 | 74 | |
duke@1 | 75 | /** Programmatic interface. If <tt>factory</tt> or <tt>args</tt> |
duke@1 | 76 | * is <tt>null</tt>, a <tt>NullPointerException</tt> is thrown. |
duke@1 | 77 | * The "<tt>-factory</tt>" and "<tt>-factorypath</tt>" |
duke@1 | 78 | * command line parameters are ignored by this entry point. |
duke@1 | 79 | * Output is directed to <tt>System.err</tt>. |
duke@1 | 80 | * |
duke@1 | 81 | * @param factory The annotation processor factory to use |
duke@1 | 82 | * @param args The command line parameters. |
duke@1 | 83 | */ |
duke@1 | 84 | public static int process(AnnotationProcessorFactory factory, String... args) { |
duke@1 | 85 | return process(factory, new PrintWriter(System.err, true), args); |
duke@1 | 86 | } |
duke@1 | 87 | |
duke@1 | 88 | /** Programmatic interface. If any argument |
duke@1 | 89 | * is <tt>null</tt>, a <tt>NullPointerException</tt> is thrown. |
duke@1 | 90 | * The "<tt>-factory</tt>" and "<tt>-factorypath</tt>" |
duke@1 | 91 | * command line parameters are ignored by this entry point. |
duke@1 | 92 | * |
duke@1 | 93 | * @param factory The annotation processor factory to use |
duke@1 | 94 | * @param args The command line parameters. |
duke@1 | 95 | * @param out Where the tool's output is directed. |
duke@1 | 96 | */ |
duke@1 | 97 | public static int process(AnnotationProcessorFactory factory, PrintWriter out, |
duke@1 | 98 | String... args) { |
duke@1 | 99 | if (out == null) |
duke@1 | 100 | throw new NullPointerException("Parameter out cannot be null."); |
duke@1 | 101 | if (factory == null) |
duke@1 | 102 | throw new NullPointerException("Parameter factory cannot be null"); |
duke@1 | 103 | return processing(factory, out, args); |
duke@1 | 104 | } |
duke@1 | 105 | |
duke@1 | 106 | private static int processing(AnnotationProcessorFactory factory, |
duke@1 | 107 | PrintWriter out, |
duke@1 | 108 | String... args) { |
duke@1 | 109 | if (out == null) |
duke@1 | 110 | out = new PrintWriter(System.err, true); |
duke@1 | 111 | com.sun.tools.apt.main.Main compiler = |
duke@1 | 112 | new com.sun.tools.apt.main.Main("apt", out); |
duke@1 | 113 | return compiler.compile(args, factory); |
duke@1 | 114 | } |
duke@1 | 115 | } |