public void internalTrigger(final NodeInstance from, String type) {
if (!org.drools.workflow.core.Node.CONNECTION_DEFAULT_TYPE.equals(type)) {
throw new IllegalArgumentException(
"A Split only accepts default incoming connections!");
}
final Split split = getSplit();
// TODO make different strategies for each type
switch ( split.getType() ) {
case Split.TYPE_AND :
triggerCompleted(org.drools.workflow.core.Node.CONNECTION_DEFAULT_TYPE, true);
break;
case Split.TYPE_XOR :
List<Connection> outgoing = split.getDefaultOutgoingConnections();
int priority = Integer.MAX_VALUE;
Connection selected = null;
for ( final Iterator<Connection> iterator = outgoing.iterator(); iterator.hasNext(); ) {
final Connection connection = (Connection) iterator.next();
ConstraintEvaluator constraint = (ConstraintEvaluator) split.getConstraint( connection );
if ( constraint != null && constraint.getPriority() < priority ) {
if ( constraint.evaluate( this,
connection,
constraint ) ) {
selected = connection;
priority = constraint.getPriority();
}
}
}
((NodeInstanceContainer) getNodeInstanceContainer()).removeNodeInstance(this);
if ( selected == null ) {
throw new IllegalArgumentException( "XOR split could not find at least one valid outgoing connection for split " + getSplit().getName() );
}
triggerConnection(selected);
break;
case Split.TYPE_OR :
((NodeInstanceContainer) getNodeInstanceContainer()).removeNodeInstance(this);
outgoing = split.getDefaultOutgoingConnections();
boolean found = false;
List<Connection> outgoingCopy = new ArrayList<Connection>(outgoing);
while (!outgoingCopy.isEmpty()) {
priority = Integer.MAX_VALUE;
Connection selectedConnection = null;
ConstraintEvaluator selectedConstraint = null;
for ( final Iterator<Connection> iterator = outgoingCopy.iterator(); iterator.hasNext(); ) {
final Connection connection = (Connection) iterator.next();
ConstraintEvaluator constraint = (ConstraintEvaluator) split.getConstraint( connection );
if ( constraint != null
&& constraint.getPriority() < priority ) {
priority = constraint.getPriority();
selectedConnection = connection;
selectedConstraint = constraint;
}
}
if (selectedConstraint.evaluate( this,
selectedConnection,
selectedConstraint ) ) {
triggerConnection(selectedConnection);
found = true;
}
outgoingCopy.remove(selectedConnection);
}
if ( !found ) {
throw new IllegalArgumentException( "OR split could not find at least one valid outgoing connection for split " + getSplit().getName() );
}
break;
default :
throw new IllegalArgumentException( "Illegal split type " + split.getType() );
}
}