/*

  Wotonomy: OpenStep design patterns for pure Java applications.

  Copyright (C) 2000 Blacksmith, Inc.

  This library is free software; you can redistribute it and/or

  modify it under the terms of the GNU Lesser General Public

  License as published by the Free Software Foundation; either

  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public

  License along with this library; if not, see http://www.gnu.org

  */

 package net.wotonomy.web;

 import java.util.Collection;

 import java.util.Iterator;

 import net.wotonomy.foundation.NSDictionary;

 public class WORepetition extends WODynamicElement {

     protected int count;

     protected int index;

     protected Object item;

     protected Collection list;

     protected Iterator iterator;

     protected WORepetition() {

         super();

     }

     public WORepetition(String aName, NSDictionary aMap, WOElement template) {

         super(aName, aMap, template);

     }

     public void setCount(int value) {

         count = value;

     }

     public int count() {

         return count;

     }

     public void setIndex(int value) {

         index = value;

     }

     public int index() {

         return index;

     }

     public void setItem(Object value) {

         item = value;

     }

     public Object item() {

         return item;

     }

     public void setList(Collection value) {

         list = value;

     }

     public Collection list() {

         return list;

     }

     public void takeValuesFromRequest(WORequest r, WOContext c) {

         c.appendZeroElementIDComponent();

         pullValuesFromParent(c.component());

         index = 0;

         WOAssociation countAsoc = (WOAssociation)associations.objectForKey("count");

         item = getNextItem();

         while (item != null) {

             pushValuesToParent(c.component());

             rootElement.takeValuesFromRequest(r, c);

             index++;

             c.incrementLastElementIDComponent();

             if (countAsoc != null && index >= count())

                 item = null;

             else

                 item = getNextItem();

         }

         iterator = null;

         c.deleteLastElementIDComponent();

     }

     public WOActionResults invokeAction(WORequest r, WOContext c) {

         c.appendZeroElementIDComponent();

         pullValuesFromParent(c.component());

         index = 0;

         WOAssociation countAsoc = (WOAssociation)associations.objectForKey("count");

         item = getNextItem();

         while (item != null) {

             pushValuesToParent(c.component());

             WOActionResults e = rootElement.invokeAction(r, c);

             if (e != null)

             {

                 iterator = null;

                 return e;

             }

             index++;

             c.incrementLastElementIDComponent();

             if (countAsoc != null && index >= count())

                 item = null;

             else

                 item = getNextItem();

         }

         iterator = null;

         c.deleteLastElementIDComponent();

         return null;

     }

     public void appendToResponse(WOResponse r, WOContext c) {

         c.appendZeroElementIDComponent();

         pullValuesFromParent(c.component());

         index = 0;

         WOAssociation countAsoc = (WOAssociation)associations.objectForKey("count");

         item = getNextItem();

         while (item != null) {

             pushValuesToParent(c.component());

             rootElement.appendToResponse(r, c);

             index++;

             c.incrementLastElementIDComponent();

             if (countAsoc != null || index < count())

                 item = null;

             else

                 item = getNextItem();

         }

         iterator = null;

         c.deleteLastElementIDComponent();

     }

     protected Object getNextItem() {

         if ( iterator == null )

         {

             if ( list == null ) return null;

             iterator = list.iterator();

         }

         if ( iterator.hasNext() ) 

         {

             return iterator.next();

         }

         return null;

     }

     protected void pullValuesFromParent(WOComponent c) {

         Object value;

         value = valueForProperty("count", c);

         if ( value instanceof Number )

         {

             setCount( ((Number)value).intValue() );

         }

         else

         {

             setCount( -1 );

         }

         value = valueForProperty("list", c);

         if ( value instanceof Collection )

         {

             setList( (Collection) value );

         }

         else

         {

             setList( null );

         }

     }

     protected void pushValuesToParent(WOComponent c) {

         setValueForProperty("index", new Integer(index), c);

         setValueForProperty("item", item, c);

     }

 }