1 /*

     2  * Copyright (c) 2004, 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

     6  * under the terms of the GNU General Public License version 2 only, as

     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  *

    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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package com.sun.tools.apt;

    27 

    28 import java.io.PrintWriter;

    29 import com.sun.mirror.apt.AnnotationProcessorFactory;

    30 

    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 {

    40 

    41     static {

    42         ClassLoader loader = Main.class.getClassLoader();

    43         if (loader != null)

    44             loader.setPackageAssertionStatus("com.sun.tools.apt", true);

    45     }

    46 

    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     }

    54 

    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     }

    63 

    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     }

    74 

    75     /** Programmatic interface.  If <tt>factory</tt> or <tt>args</tt>

    76      * is <tt>null</tt>, a <tt>NullPointerException</tt> is thrown.

    77      * The &quot;<tt>-factory</tt>&quot; and &quot;<tt>-factorypath</tt>&quot;

    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     }

    87 

    88     /** Programmatic interface.  If any argument

    89      * is <tt>null</tt>, a <tt>NullPointerException</tt> is thrown.

    90      * The &quot;<tt>-factory</tt>&quot; and &quot;<tt>-factorypath</tt>&quot;

    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     }

   105 

   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 }