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// ========================================================================
// Copyright (c) 2008-2009 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
// The Eclipse Public License is available at 
// http://www.eclipse.org/legal/epl-v10.html
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
// You may elect to redistribute this code under either of these licenses. 
// ========================================================================

package org.eclipse.jetty.security;

import java.security.Principal;

import javax.security.auth.Subject;

import org.eclipse.jetty.server.UserIdentity;


/* ------------------------------------------------------------ */
/**
 * Default Identity Service implementation.
 * This service handles only role reference maps passed in an
 * associated {@link org.eclipse.jetty.server.UserIdentity.Scope}.  If there are roles
 * refs present, then associate will wrap the UserIdentity with one
 * that uses the role references in the 
 * {@link org.eclipse.jetty.server.UserIdentity#isUserInRole(String, org.eclipse.jetty.server.UserIdentity.Scope)}
 * implementation. All other operations are effectively noops.
 *
 */
public class DefaultIdentityService implements IdentityService
{
    /* ------------------------------------------------------------ */
    public DefaultIdentityService()
    {
    }
    
    /* ------------------------------------------------------------ */
    /** 
     * If there are roles refs present in the scope, then wrap the UserIdentity 
     * with one that uses the role references in the {@link UserIdentity#isUserInRole(String, org.eclipse.jetty.server.UserIdentity.Scope)}
     */
    public Object associate(UserIdentity user)
    {
        return null;
    }

    /* ------------------------------------------------------------ */
    public void disassociate(Object previous) 
    {
    }

    /* ------------------------------------------------------------ */
    public Object setRunAs(UserIdentity user, RunAsToken token)
    {
        return token;
    }

    /* ------------------------------------------------------------ */
    public void unsetRunAs(Object lastToken)
    {
    }

    /* ------------------------------------------------------------ */
    public RunAsToken newRunAsToken(String runAsName)
    {
        return new RoleRunAsToken(runAsName);
    }

    /* ------------------------------------------------------------ */
    public UserIdentity getSystemUserIdentity()
    {
        return null;
    }

    /* ------------------------------------------------------------ */
    public UserIdentity newUserIdentity(final Subject subject, final Principal userPrincipal, final String[] roles)
    {
        return new DefaultUserIdentity(subject,userPrincipal,roles);
    }
    
}