umanaction.java

一个工作流设计及定义的系统,可以直接与数据库结合进行系统工作流程的定义及应用.

/*
 * Copyright (c) 2005, John Mettraux, OpenWFE.org
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * 
 * . Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.  
 * 
 * . Redistributions in binary form must reproduce the above copyright notice, 
 *   this list of conditions and the following disclaimer in the documentation 
 *   and/or other materials provided with the distribution.
 * 
 * . Neither the name of the "OpenWFE" nor the names of its contributors may be
 *   used to endorse or promote products derived from this software without
 *   specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * $Id: UmanAction.java,v 1.6 2005/05/17 16:40:59 jmettraux Exp $
 */

//
// UmanAction.java
//
// [e-mail]
//
// generated with 
// jtmpl 1.0.04 31.10.2002 John Mettraux ([e-mail])
//

package openwfe.org.umactions;

import javax.security.auth.Subject;
import openwfe.org.ApplicationContext;
import openwfe.org.auth.PolicyService;
import openwfe.org.uman.UmanException;


/**
 * The base for a User MANagement Action
 *
 * <p><font size=2>CVS Info :
 * <br>$Author: jmettraux $
 * <br>$Date: 2005/05/17 16:40:59 $
 * <br>$Id: UmanAction.java,v 1.6 2005/05/17 16:40:59 jmettraux Exp $ </font>
 *
 * @author [e-mail]
 */
public abstract class UmanAction

    implements java.security.PrivilegedExceptionAction

{

    //
    // FIELDS

    protected ApplicationContext applicationContext = null;
    protected String policyServiceName = null;
    protected Subject subject = null;

    protected PolicyService policyService = null;

    //
    // CONSTRUCTORS

    public UmanAction
        (ApplicationContext context,
         String policyServiceName,
         Subject subject)
    {
        this.applicationContext = context;
        this.policyServiceName = policyServiceName;
        this.subject = subject;
    }

    //
    // METHODS

    public PolicyService getPolicyService ()
        throws UmanException
    {
        if (this.policyService == null)
        {
            try
            {
                this.policyService = (PolicyService)this.applicationContext
                    .lookup(this.policyServiceName);
            }
            catch (ClassCastException cce)
            {
                throw new UmanException
                    ("Service '"+this.policyServiceName+
                     "' is not a PolicyService. Cannot manage users.", cce);
            }

            if (this.policyService == null)
            {
                throw new UmanException
                    ("No policy service named '"+this.policyServiceName+
                     "' found");
            }
        }

        return this.policyService;
    }

}