package org.drools.xml.processes;
import java.util.HashSet;
import org.drools.process.core.event.EventFilter;
import org.drools.process.core.event.EventTypeFilter;
import org.drools.workflow.core.node.EventNode;
import org.drools.workflow.core.node.EventTrigger;
import org.drools.xml.BaseAbstractHandler;
import org.drools.xml.ExtensibleXmlParser;
import org.drools.xml.Handler;
import org.w3c.dom.Element;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
public class EventFilterHandler extends BaseAbstractHandler implements Handler {
public EventFilterHandler() {
if ((this.validParents == null) && (this.validPeers == null)) {
this.validParents = new HashSet<Class<?>>();
this.validParents.add(EventNode.class);
this.validParents.add(EventTrigger.class);
this.validPeers = new HashSet<Class<?>>();
this.validPeers.add(null);
this.allowNesting = false;
}
}
public Object start(final String uri,
final String localName,
final Attributes attrs,
final ExtensibleXmlParser parser) throws SAXException {
parser.startElementBuilder( localName,
attrs );
return null;
}
public Object end(final String uri,
final String localName,
final ExtensibleXmlParser parser) throws SAXException {
final Element element = parser.endElementBuilder();
Object parent = parser.getParent();
final String type = element.getAttribute("type");
emptyAttributeCheck(localName, "type", type, parser);
if ("eventType".equals(type)) {
final String eventType = element.getAttribute("eventType");
emptyAttributeCheck(localName, "eventType", eventType, parser);
EventTypeFilter eventTypeFilter = new EventTypeFilter();
eventTypeFilter.setType(eventType);
if (parent instanceof EventNode) {
((EventNode) parent).addEventFilter(eventTypeFilter);
} else if (parent instanceof EventTrigger) {
((EventTrigger) parent).addEventFilter(eventTypeFilter);
}
} else {
throw new IllegalArgumentException(
"Unknown event filter type: " + type);
}
return null;
}
@SuppressWarnings("unchecked")
public Class generateNodeFor() {
return EventFilter.class;
}
}