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An implementation of OSGi Remote Service Admin, enhanced to provide support for OSGi Promises and streaming using OSGi PushStreams.

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/*
 Copyright 2008-2011 the original author or authors

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

package org.freshvanilla.lang.misc;

import java.lang.reflect.Field;

@SuppressWarnings("restriction")
class Unsafe implements Accessor {
	static final sun.misc.Unsafe unsafe;

    static {
        try {
            Field field = sun.misc.Unsafe.class.getDeclaredField("theUnsafe");
            field.setAccessible(true);
            unsafe = (sun.misc.Unsafe)field.get(null);
        }
        catch (Exception e) {
            throw new AssertionError(e);
        }
    }

    /* (non-Javadoc)
	 * @see org.freshvanilla.lang.misc.Accessor#newInstance(java.lang.Class)
	 */
    @SuppressWarnings("unchecked")
	@Override
	public  T newInstance(Class clazz) throws InstantiationException {
        return (T)unsafe.allocateInstance(clazz);
    }

    /* (non-Javadoc)
	 * @see org.freshvanilla.lang.misc.Accessor#getFieldAccessor(java.lang.reflect.Field)
	 */
    @Override
	public FieldAccessor getFieldAccessor(Field field) {
        Class type = field.getType();
        final long offset = unsafe.objectFieldOffset(field);

        if (type == boolean.class) {
            return new UnsafeBooleanFieldAccessor(offset);
        }

        if (type == byte.class) {
            return new UnsafeByteFieldAccessor(offset);
        }

        if (type == char.class) {
            return new UnsafeCharFieldAccessor(offset);
        }

        if (type == short.class) {
            return new UnsafeShortFieldAccessor(offset);
        }

        if (type == int.class) {
            return new UnsafeIntFieldAccessor(offset);
        }

        if (type == float.class) {
            return new UnsafeFloatFieldAccessor(offset);
        }

        if (type == long.class) {
            return new UnsafeLongFieldAccessor(offset);
        }

        if (type == double.class) {
            return new UnsafeDoubleFieldAccessor(offset);
        }

        return new UnsafeObjectFieldAccessor(offset);
    }
}