/*

  * Copyright (c) 2011, 2012, Oracle and/or its affiliates. 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.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

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

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

  * questions.

  */

 package java.lang.invoke;

 import java.security.AccessController;

 import java.security.PrivilegedAction;

 import sun.misc.Unsafe;

 /**

  * This class consists exclusively of static names internal to the

  * method handle implementation.

  * Usage:  {@code import static java.lang.invoke.MethodHandleStatics.*}

  * @author John Rose, JSR 292 EG

  */

 /*non-public*/ class MethodHandleStatics {

     private MethodHandleStatics() { }  // do not instantiate

     static final Unsafe UNSAFE = Unsafe.getUnsafe();

     static final boolean DEBUG_METHOD_HANDLE_NAMES;

     static final boolean DUMP_CLASS_FILES;

     static final boolean TRACE_INTERPRETER;

     static final boolean TRACE_METHOD_LINKAGE;

     static final Integer COMPILE_THRESHOLD;

     static {

         final Object[] values = { false, false, false, false, null };

         AccessController.doPrivileged(new PrivilegedAction<Void>() {

                 public Void run() {

                     values[0] = Boolean.getBoolean("java.lang.invoke.MethodHandle.DEBUG_NAMES");

                     values[1] = Boolean.getBoolean("java.lang.invoke.MethodHandle.DUMP_CLASS_FILES");

                     values[2] = Boolean.getBoolean("java.lang.invoke.MethodHandle.TRACE_INTERPRETER");

                     values[3] = Boolean.getBoolean("java.lang.invoke.MethodHandle.TRACE_METHOD_LINKAGE");

                     values[4] = Integer.getInteger("java.lang.invoke.MethodHandle.COMPILE_THRESHOLD");

                     return null;

                 }

             });

         DEBUG_METHOD_HANDLE_NAMES = (Boolean) values[0];

         DUMP_CLASS_FILES          = (Boolean) values[1];

         TRACE_INTERPRETER         = (Boolean) values[2];

         TRACE_METHOD_LINKAGE      = (Boolean) values[3];

         COMPILE_THRESHOLD         = (Integer) values[4];

     }

     /*non-public*/ static String getNameString(MethodHandle target, MethodType type) {

         if (type == null)

             type = target.type();

         MemberName name = null;

         if (target != null)

             name = target.internalMemberName();

         if (name == null)

             return "invoke" + type;

         return name.getName() + type;

     }

     /*non-public*/ static String getNameString(MethodHandle target, MethodHandle typeHolder) {

         return getNameString(target, typeHolder == null ? (MethodType) null : typeHolder.type());

     }

     /*non-public*/ static String getNameString(MethodHandle target) {

         return getNameString(target, (MethodType) null);

     }

     /*non-public*/ static String addTypeString(Object obj, MethodHandle target) {

         String str = String.valueOf(obj);

         if (target == null)  return str;

         int paren = str.indexOf('(');

         if (paren >= 0) str = str.substring(0, paren);

         return str + target.type();

     }

     // handy shared exception makers (they simplify the common case code)

     /*non-public*/ static InternalError newInternalError(String message, Throwable cause) {

         return new InternalError(message, cause);

     }

     /*non-public*/ static InternalError newInternalError(Throwable cause) {

         return new InternalError(cause);

     }

     /*non-public*/ static RuntimeException newIllegalStateException(String message) {

         return new IllegalStateException(message);

     }

     /*non-public*/ static RuntimeException newIllegalStateException(String message, Object obj) {

         return new IllegalStateException(message(message, obj));

     }

     /*non-public*/ static RuntimeException newIllegalArgumentException(String message) {

         return new IllegalArgumentException(message);

     }

     /*non-public*/ static RuntimeException newIllegalArgumentException(String message, Object obj) {

         return new IllegalArgumentException(message(message, obj));

     }

     /*non-public*/ static RuntimeException newIllegalArgumentException(String message, Object obj, Object obj2) {

         return new IllegalArgumentException(message(message, obj, obj2));

     }

     /*non-public*/ static Error uncaughtException(Throwable ex) {

         throw newInternalError("uncaught exception", ex);

     }

     static Error NYI() {

         throw new AssertionError("NYI");

     }

     private static String message(String message, Object obj) {

         if (obj != null)  message = message + ": " + obj;

         return message;

     }

     private static String message(String message, Object obj, Object obj2) {

         if (obj != null || obj2 != null)  message = message + ": " + obj + ", " + obj2;

         return message;

     }

 }