private static BPMNDiagram removeConnectedGateways(BPMNDiagram diagram) {
List<Gateway> XOR = getXORGateways(diagram);
Iterator<Flow> iterator = diagram.getFlows().iterator();
while (iterator.hasNext()) {
Flow flow = iterator.next();
if (XOR.contains(flow.getSource())
&& XOR.contains(flow.getTarget())
&& isSplit(diagram, flow.getSource())
&& isSplit(diagram, flow.getTarget())) {
if (!flow.getSource().equals(flow.getTarget())) {
List<Flow> flows = getOutgoingFlows(diagram, flow.getTarget());
for (Flow flow1 : flows) {
diagram.addFlow(flow.getSource(), flow1.getTarget(), "");
}
diagram.removeGateway((Gateway) flow.getTarget());
XOR = getXORGateways(diagram);
} else {
diagram.removeEdge(flow);
}
iterator = diagram.getFlows().iterator();
}
}
return diagram;
}
public static BPMNDiagram mergeDiagram(BPMNDiagram diagram) {
diagram = separateSplitFromJoin(diagram);
diagram = removeXORtoAND(diagram);
diagram = removeConnectedGateways(diagram);
int curr = diagram.getNodes().size() + diagram.getFlows().size();
int size = 0;
while (size != curr) {
mergeActivitiesAfterXOR(diagram);
mergeActivitiesBeforeXOR(diagram);
size = curr;
curr = diagram.getNodes().size() + diagram.getFlows().size();
}
return diagram;
}
private static List<Flow> getOutgoingFlows(BPMNDiagram diagram, BPMNNode bpmnNode) {
List<Flow> flows = new ArrayList<Flow>();
for (Flow flow : diagram.getFlows()) {
if (flow.getSource().equals(bpmnNode)) {
flows.add(flow);
}
}
return flows;
}
private static List<Activity> getOutgoingActivities(BPMNDiagram diagram, BPMNNode bpmnNode) {
List<Activity> flows = new ArrayList<Activity>();
for (Flow flow : diagram.getFlows()) {
if (flow.getSource().equals(bpmnNode) && flow.getTarget() instanceof Activity) {
flows.add((Activity) flow.getTarget());
}
}
return flows;
}
private static List<BPMNNode> getIncomingNodes(BPMNDiagram diagram, BPMNNode bpmnNode) {
List<BPMNNode> flows = new ArrayList<BPMNNode>();
for (Flow flow : diagram.getFlows()) {
if (flow.getTarget().equals(bpmnNode)) {
flows.add(flow.getSource());
}
}
return flows;
}
private static BPMNDiagram removeXORtoAND(BPMNDiagram diagram) {
List<Gateway> XOR = getXORGateways(diagram);
List<Gateway> AND = getANDGateways(diagram);
for (Gateway gateway1 : XOR) {
for (Gateway gateway2 : AND) {
List<Flow> flows = new ArrayList<Flow>();
for (Flow flow : diagram.getFlows()) {
if (flow.getSource().equals(gateway1) && flow.getTarget().equals(gateway2)) {
flows.add(flow);
}
}
if (flows.size() > 1) {
for (int i = 1; i < flows.size(); i++) {
diagram.removeEdge(flows.get(i));
}
}
}
}
return diagram;
}