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/*
* Copyright (c) 2013, 2014, 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.reflect;
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.security.AccessController;
import java.security.PrivilegedAction;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Utils class.
* Has *package private* access to avoid inappropriate usage.
*/
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.
*/
static final Navigator<Type, Class, Field, Method> REFLECTION_NAVIGATOR;
static { // we statically initializing REFLECTION_NAVIGATOR property
try {
Class refNav = Class.forName("com.sun.xml.internal.bind.v2.model.nav.ReflectionNavigator");
//noinspection unchecked
final Method getInstance = refNav.getDeclaredMethod("getInstance");
// requires accessClassInPackage privilege
AccessController.doPrivileged(
new PrivilegedAction<Object>() {
@Override
public Object run() {
getInstance.setAccessible(true);
return null;
}
}
);
//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() {
}
}
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