package org.jbpm.compiler.xml.processes;
import java.util.HashSet;
import org.drools.xml.BaseAbstractHandler;
import org.drools.xml.ExtensibleXmlParser;
import org.drools.xml.Handler;
import org.jbpm.workflow.core.node.ConstraintTrigger;
import org.jbpm.workflow.core.node.EventTrigger;
import org.jbpm.workflow.core.node.StartNode;
import org.jbpm.workflow.core.node.Trigger;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
public class TriggerHandler extends BaseAbstractHandler implements Handler {
public TriggerHandler() {
if ( (this.validParents == null) && (this.validPeers == null) ) {
this.validParents = new HashSet<Class<?>>();
this.validParents.add( StartNode.class );
this.validPeers = new HashSet<Class<?>>();
this.validPeers.add( null );
this.validPeers.add( Trigger.class );
this.allowNesting = false;
}
}
public Object start(final String uri,
final String localName,
final Attributes attrs,
final ExtensibleXmlParser parser) throws SAXException {
parser.startElementBuilder( localName, attrs );
StartNode startNode = (StartNode) parser.getParent();
String type = attrs.getValue("type");
emptyAttributeCheck( localName, "type", type, parser );
Trigger trigger = null;
if ("constraint".equals(type)) {
trigger = new ConstraintTrigger();
} else if ("event".equals(type)) {
trigger = new EventTrigger();
} else {
throw new SAXException("Unknown trigger type " + type);
}
startNode.addTrigger(trigger);
return trigger;
}
public Object end(final String uri,
final String localName,
final ExtensibleXmlParser parser) throws SAXException {
parser.endElementBuilder();
return parser.getCurrent();
}
@SuppressWarnings("unchecked")
public Class generateNodeFor() {
return Trigger.class;
}
}