private void invokeCallback(StateItem item) {
if (!"".equals(item.getCallback())) {
Application application = FacesContext.getCurrentInstance().getApplication();
ExpressionFactory expressionFactory = application.getExpressionFactory();
ELContext el = FacesContext.getCurrentInstance().getELContext();
try {
MethodExpression me =
expressionFactory.createMethodExpression(
el, item.getCallback(), Void.class, new Class[] {});
me.invoke(el, null);
} catch (NullPointerException ex) {
ex.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* action called by backButton
*
* @return outcome to redirect
*/
public String goBack() {
stateItens.removeLast();
if (stateItens.isEmpty()) {
try {
// if stateItens is empty go to index
FacesContext.getCurrentInstance()
.getExternalContext()
.redirect(
FacesContext.getCurrentInstance().getExternalContext().getRequestContextPath());
return null;
} catch (IOException ex) {
Logger.getLogger(StateController.class.getName()).log(Level.SEVERE, null, ex);
}
}
// update data in the managed bean
StateItem item = stateItens.peekLast();
statePullEvent.fire(new StatePullEvent(item));
buildStateModel();
invokeCallback(item);
return item.getOutcome();
}
private void buildStateModel() {
stateModel = new DynamicMenuModel();
DefaultMenuItem homeItem = new DefaultMenuItem();
homeItem.setAjax(false);
homeItem.setValue("home");
homeItem.setId(
FacesContext.getCurrentInstance().getViewRoot().createUniqueId() + "_state_home");
homeItem.setImmediate(true);
homeItem.setCommand("#{stateController.clearStateAndGoHome}");
stateModel.addElement(homeItem);
for (StateItem stateItem : stateItens) {
DefaultMenuItem item = new DefaultMenuItem();
item.setAjax(stateItem.isAjax());
item.setGlobal(stateItem.isGlobal());
item.setResetValues(stateItem.isResetValues());
item.setTitle(stateItem.getTitle());
item.setImmediate(stateItem.isImmediate());
item.setValue(getItemValue(stateItem.getValue()));
if (stateItem.getOncomplete() != null && !"".equals(stateItem.getOncomplete())) {
item.setOncomplete(stateItem.getOncomplete());
}
item.setId(FacesContext.getCurrentInstance().getViewRoot().createUniqueId() + "_state");
if (stateItem.getOutcome() != null && !"".equals(stateItem.getOutcome())) {
item.setIncludeViewParams(true);
StringBuilder url = new StringBuilder(stateItem.getOutcome());
if (stateItem.isAddEntityIdParam()) {
url.append("?id=").append(((BaseEntity) stateItem.getEntity()).getId());
}
if (url.toString().contains("?")) {
url.append("&pullState=true");
} else {
url.append("?pullState=true"); // tell statePusher to not call preRenderView event
}
url.append("&itemIndex=").append(stateItens.indexOf(stateItem));
item.setUrl(url.toString());
} else { // if has not outcome set command, note that they are muttually exclusive:
// http://stackoverflow.com/questions/16437336/using-both-setactionexpression-and-seturl-on-menuitem-object-is-not-working
item.setCommand("#{stateController.pullStateItem(" + stateItens.indexOf(stateItem) + ")}");
}
if (!"".equals(stateItem.getUpdate())) {
item.setUpdate(stateItem.getUpdate());
}
if (stateItens.indexOf(stateItem) == stateItens.size() - 1) {
item.setDisabled(true);
item.setStyleClass("ui-state-disabled");
}
stateModel.addElement(item);
}
}