xmlobjectmap.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: XmlObjectMap.java,v 1.6 2005/05/17 16:41:06 jmettraux Exp $
 */

//
// XmlObjectMap.java
//
// [e-mail]
//
// generated with 
// jtmpl 1.1.00 16.08.2003 John Mettraux ([e-mail])
//

package openwfe.org.xdbc;

/**
 * no comment
 *
 * <p><font size=2>CVS Info :
 * <br>$Author: jmettraux $
 * <br>$Id: XmlObjectMap.java,v 1.6 2005/05/17 16:41:06 jmettraux Exp $ </font>
 *
 * @author [e-mail]
 */
public class XmlObjectMap
{

    static org.apache.log4j.Logger log = org.apache.log4j.Logger
        .getLogger(XmlObjectMap.class.getName());

    //
    // CONSTANTS & co

    public final static java.util.Comparator elementComparator =
        new java.util.Comparator () 
        {
            public int compare (Object o1, Object o2)
            {
                if ( ! (o1 instanceof XmlObject) ||
                     ! (o2 instanceof XmlObject))
                {
                    return 0;
                }

                XmlObject xo1 = (XmlObject)o1;
                XmlObject xo2 = (XmlObject)o2;

                return (int)(xo1.getOrder() - xo2.getOrder());
            }

            public boolean equals (Object other)
            {
                return (other == this);
            }
        };

    //
    // FIELDS

    protected long rootElementId = -1;
    protected java.util.Map elementMap = new java.util.HashMap();
    protected java.util.Map parentElementMap = new java.util.HashMap();
    protected java.util.Map attributeMap = new java.util.HashMap();
    protected org.jdom.Element rootElement = null;

    //
    // CONSTRUCTORS

    public XmlObjectMap ()
    {
    }

    //
    // PUBLIC METHODS

    public void put (XmlObject object)
    {
        long id = object.getId();

        if (object.getObject() instanceof org.jdom.Element)
        {
            org.jdom.Element elt = (org.jdom.Element)object.getObject();

            //if (id == this.rootElementId) this.rootElement = elt;
            if (id == object.getDocumentId()) 
            {
                this.rootElementId = id;
                this.rootElement = elt;
            }

            this.elementMap.put(new Long(id), elt);
            addToParentElementMap(object);
        }
        else if (object.getObject() instanceof org.jdom.Text)
        {
            org.jdom.Text txt = (org.jdom.Text)object.getObject();

            this.elementMap.put(new Long(id), txt);
            addToParentElementMap(object);
        }
        else if (object.getObject() instanceof org.jdom.CDATA)
        {
            org.jdom.CDATA cdt = (org.jdom.CDATA)object.getObject();

            this.elementMap.put(new Long(id), cdt);
            addToParentElementMap(object);
        }
        else if (object.getObject() instanceof org.jdom.Attribute)
        {
            org.jdom.Attribute att = (org.jdom.Attribute)object.getObject();
            addToAttributeMap(object);
        }
    }

    public org.jdom.Document buildDocument ()
    {
        //
        // start all the recursion...

        fetchContent(this.rootElementId, this.rootElement);
        fetchAttributes(this.rootElementId, this.rootElement);

        if (this.rootElement == null)
        {
            log.warn("***************************************************");
        }

        return new org.jdom.Document(this.rootElement);
    }

    //
    // METHODS

    protected void fetchContent (long elementId, org.jdom.Element elt)
    {
        java.util.List children = (java.util.List)this.parentElementMap
            .get(new Long(elementId));

        if (children == null) return;

        //
        // sort children list
        
        /*
         * not necessary anymore, the SELECT takes care of it
         * by ORDERING its results (see SessionImpl.java)
         *
        java.util.Collections.sort(children, elementComparator);
         */

        //
        // add children to element

        java.util.Iterator it = children.iterator();
        while (it.hasNext())
        {
            XmlObject xo = (XmlObject)it.next();
            Object o = xo.getObject();

            if (o instanceof org.jdom.Element)
            {
                org.jdom.Element selt = (org.jdom.Element)o;

                fetchContent(xo.getId(), selt);
                fetchAttributes(xo.getId(), selt);
                    // fetch content and attributes of child 
                    // before adding child

                elt.addContent(selt);
            }
            else if (o instanceof org.jdom.Text)
            {
                elt.addContent((org.jdom.Text)o);
            }
            else if (o instanceof org.jdom.CDATA)
            {
                elt.addContent((org.jdom.CDATA)o);
            }
        }
    }

    protected void fetchAttributes (long elementId, org.jdom.Element elt)
    {
        java.util.List attributes = (java.util.List)this.attributeMap
            .get(new Long(elementId));

        if (attributes == null) return;

        java.util.Iterator it = attributes.iterator();
        while (it.hasNext())
        {
            org.jdom.Attribute att = (org.jdom.Attribute)it.next();
            elt.setAttribute(att);
        }
    }

    protected void addToParentElementMap (XmlObject object)
    {
        long parentElementId = object.getParentElementId();

        java.util.List children = (java.util.List)this.parentElementMap
            .get(new Long(parentElementId));

        if (children == null)
        {
            children = new java.util.ArrayList(10);
            this.parentElementMap.put(new Long(parentElementId), children);
        }

        children.add(object);
    }

    protected void addToAttributeMap (XmlObject object)
    {
        long parentElementId = object.getParentElementId();

        java.util.List children = (java.util.List)this.attributeMap
            .get(new Long(parentElementId));

        if (children == null)
        {
            children = new java.util.ArrayList(10);
            this.attributeMap.put(new Long(parentElementId), children);
        }

        children.add(object.getObject());
    }

}