/*

 * Copyright (c) 2013, 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 com.sun.xml.internal.bind.v2.runtime;

import com.sun.xml.internal.bind.v2.model.nav.Navigator;

import java.lang.reflect.Field;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import java.lang.reflect.Type;

import java.util.logging.Level;

import java.util.logging.Logger;

/**

 * Utils class.

 * Has *package private* access to avoid inappropriate usage.

 */

/* package */ final class Utils {

    private static final Logger LOGGER = Logger.getLogger(Utils.class.getName());

    /**

     * static ReflectionNavigator field to avoid usage of reflection every time we use it.

     */

    /* package */ static final Navigator<Type, Class, Field, Method> REFLECTION_NAVIGATOR;

    static { // we statically initializing REFLECTION_NAVIGATOR property

        Class refNav = null;

        try {

            refNav = Class.forName("com.sun.xml.internal.bind.v2.model.nav.ReflectionNavigator");

            //noinspection unchecked

            Method getInstance = refNav.getDeclaredMethod("getInstance");

            getInstance.setAccessible(true);

            //noinspection unchecked

            REFLECTION_NAVIGATOR = (Navigator<Type, Class, Field, Method>) getInstance.invoke(null);

        } catch (ClassNotFoundException e) {

            e.printStackTrace();

            throw new IllegalStateException("Can't find ReflectionNavigator class");

        } catch (InvocationTargetException e) {

            e.printStackTrace();

            throw new IllegalStateException("ReflectionNavigator.getInstance throws the exception");

        } catch (NoSuchMethodException e) {

            e.printStackTrace();

            throw new IllegalStateException("ReflectionNavigator.getInstance can't be found");

        } catch (IllegalAccessException e) {

            e.printStackTrace();

            throw new IllegalStateException("ReflectionNavigator.getInstance method is inaccessible");

        } catch (SecurityException e) {

            LOGGER.log(Level.FINE, "Unable to access ReflectionNavigator.getInstance", e);

            throw e;

        }

    }

    /**

     * private constructor to avoid util class instantiating

     */

    private Utils() {

    }

}