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/*
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;
/**
* WOConditional renders whatever is inside its opening and closing tags only if
* a condition is met. Bindings are:
* <ul>
* <li>condition: a boolean property that indicates whether the contents of the
* element should be displayed, invoked, or passed the request form values.</li>
* <li>negate: if this is true, then the behavior of the element is reversed,
* showing its contents only if the condition is NOT met.</li>
* </ul>
*
* @author ezamudio@nasoft.com
* @author $Author: cgruber $
* @version $Revision: 893 $
*/
public class WOConditional extends WODynamicElement {
public boolean condition;
public boolean negate;
protected WOConditional() {
super();
}
public WOConditional(String aName, NSDictionary aMap, WOElement template) {
super(aName, aMap, template);
}
public void setCondition(boolean value) {
condition = value;
}
public boolean condition() {
return condition;
}
public void setNegate(boolean value) {
negate = value;
}
public boolean negate() {
return negate;
}
protected void pullValuesFromParent(WOComponent c) {
condition = booleanForProperty("condition", c);
negate = booleanForProperty("negate", c);
}
public void takeValuesFromRequest(WORequest aRequest, WOContext aContext) {
if (rootElement == null)
return;
pullValuesFromParent(aContext.component());
if ((condition && !negate) || (!condition && negate)) {
rootElement.takeValuesFromRequest(aRequest, aContext);
}
}
public WOActionResults invokeAction(WORequest aRequest, WOContext aContext) {
if (rootElement == null)
return null;
pullValuesFromParent(aContext.component());
WOActionResults el = null;
if ((condition && !negate) || (!condition && negate)) {
el = rootElement.invokeAction(aRequest, aContext);
}
return el;
}
public void appendToResponse(WOResponse aResponse, WOContext aContext) {
if (rootElement == null)
return;
pullValuesFromParent(aContext.component());
if ((condition && !negate) || (!condition && negate)) {
rootElement.appendToResponse(aResponse, aContext);
}
}
}
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