/**
* Add a new state to the state machine. Bottom up addition of states is allowed but the same
* state may only exist in one hierarchy.
*
* @param state the state to add
* @param parent the parent of state
* @return stateInfo for this state
*/
private final StateInfo addState(State state, State parent) {
if (mDbg) {
Log.d(
TAG,
"addStateInternal: E state="
+ state.getName()
+ ",parent="
+ ((parent == null) ? "" : parent.getName()));
}
StateInfo parentStateInfo = null;
if (parent != null) {
parentStateInfo = mStateInfo.get(parent);
if (parentStateInfo == null) {
// Recursively add our parent as it's not been added yet.
parentStateInfo = addState(parent, null);
}
}
StateInfo stateInfo = mStateInfo.get(state);
if (stateInfo == null) {
stateInfo = new StateInfo();
mStateInfo.put(state, stateInfo);
}
// Validate that we aren't adding the same state in two different hierarchies.
if ((stateInfo.parentStateInfo != null) && (stateInfo.parentStateInfo != parentStateInfo)) {
throw new RuntimeException("state already added");
}
stateInfo.state = state;
stateInfo.parentStateInfo = parentStateInfo;
stateInfo.active = false;
if (mDbg) Log.d(TAG, "addStateInternal: X stateInfo: " + stateInfo);
return stateInfo;
}
