gomp-20050608-branch/libjava/classpath/vm/reference/java/lang/VMCompiler.java

   1 /* VMClassLoader.java -- Reference implementation of compiler interface
   2    Copyright (C) 2004 Free Software Foundation
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38 package java.lang;
  39
  40 /**
  41  * This class is just a per-VM reflection of java.lang.Compiler.
  42  * All methods are defined identically.
  43  */
  44 final class VMCompiler
  45 {
  46   /**
  47    * Don't allow new `Compiler's to be made.
  48    */
  49   private VMCompiler()
  50   {
  51   }
  52
  53   /**
  54    * Compile the class named by <code>oneClass</code>.
  55    *
  56    * @param oneClass the class to compile
  57    * @return <code>false</code> if no compiler is available or
  58    *         compilation failed, <code>true</code> if compilation succeeded
  59    * @throws NullPointerException if oneClass is null
  60    */
  61   public static boolean compileClass(Class oneClass)
  62   {
  63     // Never succeed.
  64     return false;
  65   }
  66
  67   /**
  68    * Compile the classes whose name matches <code>classNames</code>.
  69    *
  70    * @param classNames the name of classes to compile
  71    * @return <code>false</code> if no compiler is available or
  72    *         compilation failed, <code>true</code> if compilation succeeded
  73    * @throws NullPointerException if classNames is null
  74    */
  75   public static boolean compileClasses(String classNames)
  76   {
  77     // Note the incredibly lame interface.  Always fail.
  78     return false;
  79   }
  80
  81   /**
  82    * This method examines the argument and performs an operation
  83    * according to the compilers documentation.  No specific operation
  84    * is required.
  85    *
  86    * @param arg a compiler-specific argument
  87    * @return a compiler-specific value, including null
  88    * @throws NullPointerException if the compiler doesn't like a null arg
  89    */
  90   public static Object command(Object arg)
  91   {
  92     // Our implementation defines this to a no-op.
  93     return null;
  94   }
  95
  96   /**
  97    * Calling <code>Compiler.enable()</code> will cause the compiler
  98    * to resume operation if it was previously disabled; provided that a
  99    * compiler even exists.
 100    */
 101   public static void enable()
 102   {
 103   }
 104
 105   /**
 106    * Calling <code>Compiler.disable()</code> will cause the compiler
 107    * to be suspended; provided that a compiler even exists.
 108    */
 109   public static void disable()
 110   {
 111   }
 112 }