/*
 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 net.wotonomy.foundation.NSDictionary;
import net.wotonomy.foundation.NSMutableDictionary;

public class WOSwitchComponent extends WODynamicElement {

	private NSMutableDictionary elements;
	private String currentName;
	private WOElement currentElement;

	protected WOSwitchComponent() {
		super();
		elements = new NSMutableDictionary();
	}

	public WOSwitchComponent(String aName, NSDictionary aMap, WOElement template) {
		super(aName, aMap, template);
		elements = new NSMutableDictionary();
	}

	private WOElement getCurrentElement(WOContext c) {
		String name = stringForProperty("WOComponentName", c.component());
		if (name == null)
			return null;

		if (currentElement != null && name.equals(currentName))
			return currentElement;

		currentName = name;
		currentElement = (WOElement) elements.objectForKey(name);
		if (currentElement == null) {
			currentElement = WOApplication.application().pageWithName(name, c);
			if (currentElement != null) {
				currentElement.associations = associations;
				elements.setObjectForKey(currentElement, name);
			}
		}

		return currentElement;
	}

	void ensureAwakeInContext(WOContext aContext) {
		if (aContext != null) {
			WOElement element = getCurrentElement(aContext);
			if (element != null) {
				aContext.pushElement(element);
				element.ensureAwakeInContext(aContext);
				aContext.popElement();
			}
		}
	}

	public void takeValuesFromRequest(WORequest r, WOContext c) {
		WOElement element = getCurrentElement(c);
		if (element != null) {
			c.pushElement(element);
			element.takeValuesFromRequest(r, c);
			c.popElement();
		}
	}

	public WOActionResults invokeAction(WORequest r, WOContext c) {
		WOActionResults result = null;
		WOElement element = getCurrentElement(c);
		if (element != null) {
			c.pushElement(element);
			result = element.invokeAction(r, c);
			c.popElement();
		}
		return result;
	}

	public void appendToResponse(WOResponse r, WOContext c) {
		WOElement element = getCurrentElement(c);
		if (element != null) {
			c.pushElement(element);
			element.appendToResponse(r, c);
			c.popElement();
		}
	}
}