org.identityconnectors.common.ByteUtil Maven / Gradle / Ivy
/*
* ====================
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 2008-2009 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of the Common Development
* and Distribution License("CDDL") (the "License"). You may not use this file
* except in compliance with the License.
*
* You can obtain a copy of the License at
* http://IdentityConnectors.dev.java.net/legal/license.txt
* See the License for the specific language governing permissions and limitations
* under the License.
*
* When distributing the Covered Code, include this CDDL Header Notice in each file
* and include the License file at identityconnectors/legal/license.txt.
* If applicable, add the following below this CDDL Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyrighted [year] [name of copyright owner]"
* ====================
*/
package org.identityconnectors.common;
import java.util.Random;
/**
* Utility package for byte manipulation.
*
* @author Will Droste
* @version $Revision $
* @since 1.0
*/
public final class ByteUtil {
/**
* Never allow this to be instantiated.
*/
private ByteUtil() {
throw new AssertionError();
}
/**
* For those that like the random bytes to be created and returned. Uses the
* {@link Random#nextBytes(byte[])} method to generate the random data.
*
* @param r
* to keep the same randomizer just pass it in..
* @param length
* size of the array of random data returned.
* @return byte array of random data.
*/
public static byte[] randomBytes(Random r, int length) {
byte[] ret = new byte[length];
r.nextBytes(ret);
return ret;
}
/**
* Get a random array of bytes with the length specified.
*
* @param length
* the size of the byte array returned.
* @return random array of bytes with the length specified.
*/
public static byte[] randomBytes(int length) {
return randomBytes(new Random(), length);
}
/**
* Random array of bytes with a random length. The length should be no
* greater that 4k.
*
* @param r
* uses the randomizer provided to generate the random data.
* @return a byte array no bigger than 4k filled with random data.
*/
public static byte[] randomBytes(Random r) {
return randomBytes(r, r.nextInt(4048));
}
/**
* Random array of bytes with a random length. The length should be no
* greater that 4k.
*
* @return a byte array no bigger than 4k filled with random data.
*/
public static byte[] randomBytes() {
return randomBytes(new Random());
}
}