headermap.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: HeaderMap.java,v 1.7 2005/05/17 16:41:01 jmettraux Exp $
 */

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

package openwfe.org.webclient;

import openwfe.org.engine.expressions.FlowExpressionId;
import openwfe.org.worklist.Header;


/**
 * A snapshot of a worklist, store by store.
 *
 * <p><font size=2>CVS Info :
 * <br>$Author: jmettraux $
 * <br>$Date: 2005/05/17 16:41:01 $
 * <br>$Id: HeaderMap.java,v 1.7 2005/05/17 16:41:01 jmettraux Exp $ </font>
 *
 * @author [e-mail]
 */
public class HeaderMap
{

    private final static org.apache.log4j.Logger log = org.apache.log4j.Logger
        .getLogger(HeaderMap.class.getName());

    //
    // CONSTANTS (definitions)

    public final static String delimiter = "....";
    public final static String delimiterRegex = "\\.\\.\\.\\.";

    //
    // FIELDS

    private java.util.Map storeMap = new java.util.HashMap();
    private java.util.Set writeSet = new java.util.HashSet();

    //
    // CONSTRUCTORS

    //
    // METHODS

    /**
     * Removes all the entries in the headerMap
     */
    public void clear ()
    {
        this.storeMap.clear();
        this.writeSet.clear();
    }

    public java.util.Set getStores ()
    {
        return this.storeMap.keySet();
    }

    public void putHeaders 
        (final String storeName, 
         final boolean canWrite, 
         final java.util.List headers)
    {
        //
        // tag each header

        for (int i=0; i<headers.size(); i++)
        {
            String workItemId = storeName + delimiter + i;
            Header h = (Header)headers.get(i);

            h.setStringId(workItemId);

            //log.debug
            //    ("putHeaders() workitemId >"+workItemId+
            //     "<  storeName >"+storeName+
            //     "<   -->  "+h.getExpressionId());
        }

        this.storeMap.put(storeName, headers);

        if (canWrite) 
            this.writeSet.add(storeName);
        else
            this.writeSet.remove(storeName);
    }

    public java.util.List getHeaders (final String storeName)
    {
        return (java.util.List)this.storeMap.get(storeName);
    }

    public Header getHeader (final String id)
        throws WebclientException
    {
        try
        {
            final String[] ss = id.split(delimiterRegex);

            final String storeName = ss[0];
            final String sIndex = ss[1];

            //log.debug("parseExpressionId() storeName >"+storeName+"<");
            //log.debug("parseExpressionId() index     >"+sIndex+"<");

            int index = Integer.parseInt(sIndex);

            final java.util.List headers = getHeaders(storeName);

            return (Header)headers.get(index);
        }
        catch (final Exception e)
        {
            throw new WebclientException
                ("Failed to retrieve a header", e);
        }
    }

    public FlowExpressionId parseExpressionId (final String expressionId)
        throws WebclientException
    {
        final Header h = getHeader(expressionId);
        return h.getExpressionId();
    }

    public boolean canWrite (final String storeName)
    {
        return this.writeSet.contains(storeName);
    }

    //
    // STATIC METHODS

    public static String getStoreName (final String workItemId)
    {
        if (workItemId == null) return null;

        int i = workItemId.indexOf("....");

        if (i < 0) return null;

        return workItemId.substring(0, i);
    }

}