--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/lang/Compiler.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,136 @@
+/*
+ * Copyright 1995-2006 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package java.lang;
+
+/**
+ * The {@code Compiler} class is provided to support Java-to-native-code
+ * compilers and related services. By design, the {@code Compiler} class does
+ * nothing; it serves as a placeholder for a JIT compiler implementation.
+ *
+ * <p> When the Java Virtual Machine first starts, it determines if the system
+ * property {@code java.compiler} exists. (System properties are accessible
+ * through {@link System#getProperty(String)} and {@link
+ * System#getProperty(String, String)}.  If so, it is assumed to be the name of
+ * a library (with a platform-dependent exact location and type); {@link
+ * System#loadLibrary} is called to load that library. If this loading
+ * succeeds, the function named {@code java_lang_Compiler_start()} in that
+ * library is called.
+ *
+ * <p> If no compiler is available, these methods do nothing.
+ *
+ * @author  Frank Yellin
+ * @since   JDK1.0
+ */
+public final class Compiler  {
+    private Compiler() {}               // don't make instances
+
+    private static native void initialize();
+
+    private static native void registerNatives();
+
+    static {
+        registerNatives();
+        java.security.AccessController.doPrivileged
+            (new java.security.PrivilegedAction() {
+                public Object run() {
+                    boolean loaded = false;
+                    String jit = System.getProperty("java.compiler");
+                    if ((jit != null) && (!jit.equals("NONE")) &&
+                        (!jit.equals("")))
+                    {
+                        try {
+                            System.loadLibrary(jit);
+                            initialize();
+                            loaded = true;
+                        } catch (UnsatisfiedLinkError e) {
+                            System.err.println("Warning: JIT compiler \"" +
+                              jit + "\" not found. Will use interpreter.");
+                        }
+                    }
+                    String info = System.getProperty("java.vm.info");
+                    if (loaded) {
+                        System.setProperty("java.vm.info", info + ", " + jit);
+                    } else {
+                        System.setProperty("java.vm.info", info + ", nojit");
+                    }
+                    return null;
+                }
+            });
+    }
+
+    /**
+     * Compiles the specified class.
+     *
+     * @param  clazz
+     *         A class
+     *
+     * @return  {@code true} if the compilation succeeded; {@code false} if the
+     *          compilation failed or no compiler is available
+     *
+     * @throws  NullPointerException
+     *          If {@code clazz} is {@code null}
+     */
+    public static native boolean compileClass(Class<?> clazz);
+
+    /**
+     * Compiles all classes whose name matches the specified string.
+     *
+     * @param  string
+     *         The name of the classes to compile
+     *
+     * @return  {@code true} if the compilation succeeded; {@code false} if the
+     *          compilation failed or no compiler is available
+     *
+     * @throws  NullPointerException
+     *          If {@code string} is {@code null}
+     */
+    public static native boolean compileClasses(String string);
+
+    /**
+     * Examines the argument type and its fields and perform some documented
+     * operation.  No specific operations are required.
+     *
+     * @param  any
+     *         An argument
+     *
+     * @return  A compiler-specific value, or {@code null} if no compiler is
+     *          available
+     *
+     * @throws  NullPointerException
+     *          If {@code any} is {@code null}
+     */
+    public static native Object command(Object any);
+
+    /**
+     * Cause the Compiler to resume operation.
+     */
+    public static native void enable();
+
+    /**
+     * Cause the Compiler to cease operation.
+     */
+    public static native void disable();
+}