/*

 * Copyright (c) 2011, 2016, 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 jdk.internal.misc.Unsafe;

import sun.security.action.GetPropertyAction;

import java.util.Properties;

/**

 * 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 boolean TRACE_RESOLVE;

    static final int COMPILE_THRESHOLD;

    static final boolean LOG_LF_COMPILATION_FAILURE;

    static final int DONT_INLINE_THRESHOLD;

    static final int PROFILE_LEVEL;

    static final boolean PROFILE_GWT;

    static final int CUSTOMIZE_THRESHOLD;

    static final boolean VAR_HANDLE_GUARDS;

    static final int MAX_ARITY;

    static {

        Properties props = GetPropertyAction.privilegedGetProperties();

        DEBUG_METHOD_HANDLE_NAMES = Boolean.parseBoolean(

                props.getProperty("java.lang.invoke.MethodHandle.DEBUG_NAMES"));

        DUMP_CLASS_FILES = Boolean.parseBoolean(

                props.getProperty("java.lang.invoke.MethodHandle.DUMP_CLASS_FILES"));

        TRACE_INTERPRETER = Boolean.parseBoolean(

                props.getProperty("java.lang.invoke.MethodHandle.TRACE_INTERPRETER"));

        TRACE_METHOD_LINKAGE = Boolean.parseBoolean(

                props.getProperty("java.lang.invoke.MethodHandle.TRACE_METHOD_LINKAGE"));

        TRACE_RESOLVE = Boolean.parseBoolean(

                props.getProperty("java.lang.invoke.MethodHandle.TRACE_RESOLVE"));

        COMPILE_THRESHOLD = Integer.parseInt(

                props.getProperty("java.lang.invoke.MethodHandle.COMPILE_THRESHOLD", "0"));

        LOG_LF_COMPILATION_FAILURE = Boolean.parseBoolean(

                props.getProperty("java.lang.invoke.MethodHandle.LOG_LF_COMPILATION_FAILURE", "false"));

        DONT_INLINE_THRESHOLD = Integer.parseInt(

                props.getProperty("java.lang.invoke.MethodHandle.DONT_INLINE_THRESHOLD", "30"));

        PROFILE_LEVEL = Integer.parseInt(

                props.getProperty("java.lang.invoke.MethodHandle.PROFILE_LEVEL", "0"));

        PROFILE_GWT = Boolean.parseBoolean(

                props.getProperty("java.lang.invoke.MethodHandle.PROFILE_GWT", "true"));

        CUSTOMIZE_THRESHOLD = Integer.parseInt(

                props.getProperty("java.lang.invoke.MethodHandle.CUSTOMIZE_THRESHOLD", "127"));

        VAR_HANDLE_GUARDS = Boolean.parseBoolean(

                props.getProperty("java.lang.invoke.VarHandle.VAR_HANDLE_GUARDS", "true"));

        // Do not adjust this except for special platforms:

        MAX_ARITY = Integer.parseInt(

                props.getProperty("java.lang.invoke.MethodHandleImpl.MAX_ARITY", "255"));

        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 |

                LOG_LF_COMPILATION_FAILURE);

    }

    // 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, Exception cause) {

        return new InternalError(message, cause);

    }

    /*non-public*/ static InternalError newInternalError(Exception 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 new InternalError("uncaught exception", ex);

    }

    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;

    }

    /*non-public*/ static void rangeCheck2(int start, int end, int size) {

        if (0 > start || start > end || end > size)

            throw new IndexOutOfBoundsException(start+".."+end);

    }

    /*non-public*/ static int rangeCheck1(int index, int size) {

        if (0 > index || index >= size)

            throw new IndexOutOfBoundsException(index);

        return index;

    }

}