/*
 * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 *
 *
 */

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 int COMPILE_THRESHOLD;
 static final int DONT_INLINE_THRESHOLD;
 static final int PROFILE_LEVEL;
 static final boolean PROFILE_GWT;
 static final int CUSTOMIZE_THRESHOLD;

 static {
 final Object[] values = new Object[9];
 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", 0);
 values[5] = Integer.getInteger("java.lang.invoke.MethodHandle.DONT_INLINE_THRESHOLD", 30);
 values[6] = Integer.getInteger("java.lang.invoke.MethodHandle.PROFILE_LEVEL", 0);
 values[7] = Boolean.parseBoolean(System.getProperty("java.lang.invoke.MethodHandle.PROFILE_GWT", "true"));
 values[8] = Integer.getInteger("java.lang.invoke.MethodHandle.CUSTOMIZE_THRESHOLD", 127);
 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];
 DONT_INLINE_THRESHOLD = (Integer) values[5];
 PROFILE_LEVEL = (Integer) values[6];
 PROFILE_GWT = (Boolean) values[7];
 CUSTOMIZE_THRESHOLD = (Integer) values[8];

 if (CUSTOMIZE_THRESHOLD < -1 || CUSTOMIZE_THRESHOLD > 127) {
 throw newInternalError("CUSTOMIZE_THRESHOLD should be in [-1...127] range");
 }
 }

 /** Tell if any of the debugging switches are turned on.
 * If this is the case, it is reasonable to perform extra checks or save extra information.
 */
 /*non-public*/ static boolean debugEnabled() {
 return (DEBUG_METHOD_HANDLE_NAMES |
 DUMP_CLASS_FILES |
 TRACE_INTERPRETER |
 TRACE_METHOD_LINKAGE);
 }

 /*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) {
 return new InternalError(message);
 }
 /*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));
 }
 /** Propagate unchecked exceptions and errors, but wrap anything checked and throw that instead. */
 /*non-public*/ static Error uncaughtException(Throwable ex) {
 if (ex instanceof Error) throw (Error) ex;
 if (ex instanceof RuntimeException) throw (RuntimeException) 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;
 }
}