/*
* Copyright (C) NetStruxr, Inc. All rights reserved.
*
* This software is published under the terms of the NetStruxr
* Public Software License version 0.5, a copy of which has been
* included with this distribution in the LICENSE.NPL file. */
package er.directtoweb.components.buttons;
import org.apache.log4j.Logger;
import com.webobjects.appserver.WOComponent;
import com.webobjects.appserver.WOContext;
import com.webobjects.appserver.WODisplayGroup;
import com.webobjects.directtoweb.D2W;
import com.webobjects.directtoweb.D2WContext;
import com.webobjects.directtoweb.NextPageDelegate;
import com.webobjects.directtoweb.QueryPageInterface;
import com.webobjects.eoaccess.EODatabaseDataSource;
import com.webobjects.eocontrol.EODataSource;
import com.webobjects.eocontrol.EOQualifier;
import er.directtoweb.components.ERDCustomQueryComponent;
import er.extensions.appserver.ERXDisplayGroup;
/**
* Cool component that can be used in D2W list pages to filter the list, throwing to a D2W query page to restrict.<br />
*
* @binding d2wContext
* @binding displayGroup
*/
public class ERDFilterDisplayGroupButton extends ERDCustomQueryComponent {
/**
* Do I need to update serialVersionUID?
* See section 5.6 <cite>Type Changes Affecting Serialization</cite> on page 51 of the
* <a href="http://java.sun.com/j2se/1.4/pdf/serial-spec.pdf">Java Object Serialization Spec</a>
*/
private static final long serialVersionUID = 1L;
public ERDFilterDisplayGroupButton(WOContext context) { super(context); }
public static final Logger log = Logger.getLogger(ERDFilterDisplayGroupButton.class);
@Override
public boolean isStateless() { return true; }
@Override
public boolean synchronizesVariablesWithBindings() { return false; }
public static class _FilterDelegate implements NextPageDelegate {
private WOComponent _nextPage;
private WODisplayGroup _displayGroup;
public _FilterDelegate(WOComponent nextPage,
WODisplayGroup displayGroup) {
_nextPage=nextPage;
_displayGroup=displayGroup;
}
public WOComponent nextPage(WOComponent sender) {
WOComponent result=_nextPage;
QueryPageInterface qpi=(QueryPageInterface)sender;
EODataSource eds=qpi.queryDataSource();
if (eds!=null) {
if (eds instanceof EODatabaseDataSource) {
EODatabaseDataSource dbds=(EODatabaseDataSource)eds;
EOQualifier q=dbds.fetchSpecification().qualifier();
log.debug("Setting qualifier to "+q);
_displayGroup.setQualifier(q);
_displayGroup.updateDisplayedObjects();
} else {
log.warn("Data source of unknown type: "+eds.getClass().getName());
}
}
return result;
}
}
public WOComponent filter() {
String pageConfigurationForFiltering=(String)valueForBinding("pageConfigurationForFiltering");
QueryPageInterface qpi;
if(pageConfigurationForFiltering!=null) {
qpi = (QueryPageInterface)D2W.factory().pageForConfigurationNamed(pageConfigurationForFiltering, session());
} else {
String entityName = (String)valueForBinding("entityName");
if(entityName == null && d2wContext() != null) {
entityName = d2wContext().entity().name();
}
if(entityName == null)
throw new IllegalStateException("entityName or d2wContext can't both be null.");
qpi = D2W.factory().queryPageForEntityNamed(entityName, session());
}
qpi.setNextPageDelegate(new _FilterDelegate(context().page(), displayGroup()));
D2WContext d2wContext = (D2WContext)((WOComponent)qpi).valueForKey("d2wContext");
d2wContext.takeValueForKey("filter", "subTask");
return (WOComponent)qpi;
}
public WOComponent clearFilter(){
displayGroup().setQualifier(null);
displayGroup().updateDisplayedObjects();
if (displayGroup() instanceof ERXDisplayGroup) {
ERXDisplayGroup dg = (ERXDisplayGroup) displayGroup();
dg.clearExtraQualifiers();
}
return null;
}
}