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/* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
 *
 * 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.acegisecurity.providers;

import org.acegisecurity.GrantedAuthority;


/**
 * An {@link org.acegisecurity.Authentication} implementation that is designed
 * for simple presentation of a username and password.
 * 
 * 
 * The principal and credentials should be set with
 * an Object that provides the respective property via its
 * Object.toString() method. The simplest such
 * Object to use is String.
 * 
 *
 * @author Ben Alex
 * @version $Id: UsernamePasswordAuthenticationToken.java,v 1.12 2006/02/09 04:16:50 benalex Exp $
 */
public class UsernamePasswordAuthenticationToken
    extends AbstractAuthenticationToken {
    //~ Instance fields ========================================================

    private Object credentials;
    private Object principal;

    //~ Constructors ===========================================================

    /**
     * This constructor can be safely used by any code that wishes to create a
     * UsernamePasswordAuthenticationToken, as the {@link
     * #isAuthenticated()} will return false.
     *
     * @param principal DOCUMENT ME!
     * @param credentials DOCUMENT ME!
     */
    public UsernamePasswordAuthenticationToken(Object principal,
        Object credentials) {
        super(null);
        this.principal = principal;
        this.credentials = credentials;
        setAuthenticated(false);
    }

    /**
     * This constructor should only be used by
     * AuthenticationManager or
     * AuthenticationProvider implementations that are satisfied
     * with producing a trusted (ie {@link #isAuthenticated()} =
     * true) authentication token.
     *
     * @param principal
     * @param credentials
     * @param authorities
     */
    public UsernamePasswordAuthenticationToken(Object principal,
        Object credentials, GrantedAuthority[] authorities) {
        super(authorities);
        this.principal = principal;
        this.credentials = credentials;
        super.setAuthenticated(true); // must use super, as we override
    }

    //~ Methods ================================================================

    public Object getCredentials() {
        return this.credentials;
    }

    public Object getPrincipal() {
        return this.principal;
    }

    public void setAuthenticated(boolean isAuthenticated)
        throws IllegalArgumentException {
        if (isAuthenticated == true) {
            throw new IllegalArgumentException(
                "Cannot set this token to trusted - use constructor containing GrantedAuthority[]s instead");
        }

        super.setAuthenticated(false);
    }
}