unknownusernameauthenticationexception.java

来自「CAS在Tomcat中实现单点登录项目,单点登录（Single Sign On 」· Java 代码 · 共 69 行

/*
 * Copyright 2007 The JA-SIG Collaborative. All rights reserved. See license
 * distributed with this file and available online at
 * http://www.ja-sig.org/products/cas/overview/license/
 */
package org.jasig.cas.authentication.handler;

/**
 * The exception to throw when we explicitly don't know anything about the
 * username.
 * 
 * @author Scott Battaglia
 * @version $Revision: 42053 $ $Date: 2007-06-10 09:17:55 -0400 (Sun, 10 Jun 2007) $
 * @since 3.0
 */
public class UnknownUsernameAuthenticationException extends
    BadUsernameOrPasswordAuthenticationException {

    /** Static instance of UnknownUsernameAuthenticationException. */
    public static final UnknownUsernameAuthenticationException ERROR = new UnknownUsernameAuthenticationException();

    /** Unique ID for serializing. */
    private static final long serialVersionUID = 3977861752513837361L;

    /** The code description of this exception. */
    private static final String CODE = "error.authentication.credentials.bad.usernameorpassword.username";

    /**
     * Default constructor that does not allow the chaining of exceptions and
     * uses the default code as the error code for this exception.
     */
    public UnknownUsernameAuthenticationException() {
        super(CODE);
    }

    /**
     * Constructor that allows for the chaining of exceptions. Defaults to the
     * default code provided for this exception.
     * 
     * @param throwable the chained exception.
     */
    public UnknownUsernameAuthenticationException(final Throwable throwable) {
        super(CODE, throwable);
    }

    /**
     * Constructor that allows for providing a custom error code for this class.
     * Error codes are often used to resolve exceptions into messages. Providing
     * a custom error code allows the use of a different message.
     * 
     * @param code the custom code to use with this exception.
     */
    public UnknownUsernameAuthenticationException(final String code) {
        super(code);
    }

    /**
     * Constructor that allows for chaining of exceptions and a custom error
     * code.
     * 
     * @param code the custom error code to use in message resolving.
     * @param throwable the chained exception.
     */
    public UnknownUsernameAuthenticationException(final String code,
        final Throwable throwable) {
        super(code, throwable);
    }
}