/*
 * Hibernate Validator, declare and validate application constraints
 *
 * License: Apache License, Version 2.0
 * See the license.txt file in the root directory or <http://www.apache.org/licenses/LICENSE-2.0>.
 */
package org.hibernate.validator.internal.util.privilegedactions;

import java.security.PrivilegedAction;

import org.hibernate.validator.internal.util.logging.Log;
import org.hibernate.validator.internal.util.logging.LoggerFactory;

/**
 * Execute instance creation as privileged action.
 *
 * @author Emmanuel Bernard
 * @author Hardy Ferentschik
 */
public final class NewInstance<T> implements PrivilegedAction<T> {

	private static final Log log = LoggerFactory.make();

	private final Class<T> clazz;
	private final String message;

	public static <T> NewInstance<T> action(Class<T> clazz, String message) {
		return new NewInstance<T>( clazz, message );
	}

	private NewInstance(Class<T> clazz, String message) {
		this.clazz = clazz;
		this.message = message;
	}

	@Override
	public T run() {
		try {
			return clazz.newInstance();
		}
		catch (InstantiationException e) {
			throw log.getUnableToInstantiateException( message, clazz, e );
		}
		catch (IllegalAccessException e) {
			throw log.getUnableToInstantiateException( clazz, e );
		}
		catch (RuntimeException e) {
			throw log.getUnableToInstantiateException( clazz, e );
		}
	}
}