gcc/libjava/java/lang/Compiler.java

/* Compiler.java -- Interface for implementing a method to override 
   Object.clone()comparaing objects to obtain an ordering
   Copyright (C) 1998, 1999, 2001 Free Software Foundation, Inc.

This file is part of GNU Classpath.

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it under the terms of the GNU General Public License as published by
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WITHOUT ANY WARRANTY; without even the implied warranty of
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
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exception statement from your version. */


package java.lang;

/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
 */

/**
 * The <code>Compiler</code> class is a place holder for a JIT
 * compiler implementation does nothing unless there is such a 
 * compiler by default.
 * <p>
 * The system property <code>java.compiler</code> may contain the name
 * of a library to load with <code>System.loadLibrary</code> when the
 * virtual machine first starts.  If so and loading the library succeeds,
 * then a function by the name of <code>java_lang_Compiler_start()</code> 
 * in that library is called.
 *
 * Note that a VM might not have implemented any of this.
 *
 * @author Tom Tromey <tromey@cygnus.com>
 *
 * @since JDK 1.0
 * @see System#getProperty(java.lang.String)
 * @see System#getProperty(java.lang.String,java.lang.String)
 * @see System#loadLibrary(java.lang.String)
 */
public final class Compiler 
{
    /**
     * Don't allow new `Compiler's to be made.
     */
    private Compiler ()
    {
    }

    /**
     * Compile the class named by <code>oneClass</code>.
     * 
     * @param oneClass the class to compile
     * @return <code>false</code> if no compiler is available or 
     * compilation failed and <code>true</code> if compilation succeeded.
     */
    public static boolean compileClass (Class oneClass) 
    {
 	// Never succeed.
	return false;
    }
    
    /**
     * Compile the classes whose name matches <code>classNames/code>.
     *
     * @param classNames the name of classes to compile
     * @return <code>false</code> if no compiler is available or 
     * compilation failed and <code>true</code> if compilation succeeded.
     */
    public static boolean compileClasses (String classNames) 
    {
	// Note the incredibly lame interface.  Always fail.
	return false;
    }

    /**
     * This method examines the argument and performs an operation 
     * according to the compilers documentation.  No specific operation
     * is required.
     */
    public static Object command (Object arg) 
    {
	// Our implementation defines this to a no-op.
	return null;
    }

    /**
     * Calling <code>Compiler.enable()</code> will cause the compiler
     * to resume operation if it was previously disabled.  
     */
    public static void enable () { }

    /**
     * Calling <code>Compiler.disable()</code> will cause the compiler
     * to be suspended.
     */
    public static void disable () { }
}