use of org.apache.cayenne.modeler.action.NavigateForwardAction in project cayenne by apache.
the class ProjectController method fireNavigationEvent.
public void fireNavigationEvent(EventObject e) {
Object source = e.getSource();
if (source == null) {
return;
}
int size = controllerStateHistory.size();
if (size == 0)
return;
int i = controllerStateHistory.indexOf(currentState);
ControllerState cs;
if (size == 1) {
cs = controllerStateHistory.get(0);
} else if (source instanceof NavigateForwardAction) {
int counter = 0;
while (true) {
if (i < 0) {
// a new state got created without it being saved.
// just move to the beginning of the list
cs = controllerStateHistory.get(0);
} else if (i + 1 < size) {
// move forward
cs = controllerStateHistory.get(i + 1);
} else {
// wrap around
cs = controllerStateHistory.get(0);
}
if (!cs.isEquivalent(currentState)) {
break;
}
// a loop
if (++counter > 5) {
break;
}
i++;
}
} else if (source instanceof NavigateBackwardAction) {
int counter = 0;
while (true) {
if (i < 0) {
// a new state got created without it being saved.
try {
cs = controllerStateHistory.get(size - 2);
} catch (ArrayIndexOutOfBoundsException ex) {
cs = controllerStateHistory.get(size - 1);
}
} else if (i - 1 >= 0) {
// move to the previous one
cs = controllerStateHistory.get(i - 1);
} else {
// wrap around
cs = controllerStateHistory.get(size - 1);
}
if (!cs.isEquivalent(currentState)) {
break;
}
// if it doesn't find it within 5 tries it is probably stuck in a loop
if (++counter > 5) {
break;
}
i--;
}
} else {
throw new IllegalStateException("Unknown source for navigation event: " + e.getSource());
}
// reset the current state to the one we just navigated to
currentState = cs;
DisplayEvent de = cs.event;
if (de == null) {
return;
}
// make sure that isRefiring is turned off prior to exiting this routine
// this flag is used to tell the controller to not create new states
// when we are refiring the event that we saved earlier
currentState.isRefiring = true;
// the order of the following is checked in most specific to generic
// because of the inheritance hierarchy
de.setRefired(true);
if (de instanceof EntityDisplayEvent) {
EntityDisplayEvent ede = (EntityDisplayEvent) de;
ede.setEntityChanged(true);
if (ede.getEntity() instanceof ObjEntity) {
fireObjEntityDisplayEvent(ede);
} else if (ede.getEntity() instanceof DbEntity) {
fireDbEntityDisplayEvent(ede);
}
} else if (de instanceof EmbeddableDisplayEvent) {
EmbeddableDisplayEvent ede = (EmbeddableDisplayEvent) de;
ede.setEmbeddableChanged(true);
fireEmbeddableDisplayEvent(ede);
} else if (de instanceof ProcedureDisplayEvent) {
ProcedureDisplayEvent pde = (ProcedureDisplayEvent) de;
pde.setProcedureChanged(true);
fireProcedureDisplayEvent(pde);
} else if (de instanceof QueryDisplayEvent) {
QueryDisplayEvent qde = (QueryDisplayEvent) de;
qde.setQueryChanged(true);
fireQueryDisplayEvent(qde);
} else if (de instanceof DataMapDisplayEvent) {
DataMapDisplayEvent dmde = (DataMapDisplayEvent) de;
dmde.setDataMapChanged(true);
fireDataMapDisplayEvent(dmde);
} else if (de instanceof DataNodeDisplayEvent) {
DataNodeDisplayEvent dnde = (DataNodeDisplayEvent) de;
dnde.setDataNodeChanged(true);
fireDataNodeDisplayEvent(dnde);
} else if (de instanceof DomainDisplayEvent) {
DomainDisplayEvent dde = (DomainDisplayEvent) de;
dde.setDomainChanged(true);
fireDomainDisplayEvent(dde);
}
// turn off refiring
currentState.isRefiring = false;
}
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