http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5. 
package org.bouncycastle.crypto.tls;


RFC 2246 7.2

/**
 * RFC 2246 7.2
 */
public class AlertLevel
{
    public static final short warning = 1;
    public static final short fatal = 2;
}