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package org.uscxml;
import java.util.BitSet;
import java.util.Deque;
import java.util.List;
import java.util.Map;
/** Base class for generated StateCharts */
public abstract class StateChart {
public enum InterpreterState {
USCXML_FINISHED,
USCXML_UNDEF,
USCXML_IDLE,
USCXML_INITIALIZED,
USCXML_INSTANTIATED,
USCXML_MICROSTEPPED,
USCXML_MACROSTEPPED,
USCXML_CANCELLED
}
public enum StateType {
USCXML_STATE_ATOMIC,
USCXML_STATE_PARALLEL,
USCXML_STATE_COMPOUND,
USCXML_STATE_FINAL,
USCXML_STATE_HISTORY_DEEP,
USCXML_STATE_HISTORY_SHALLOW,
USCXML_STATE_INITIAL,
USCXML_STATE_HAS_HISTORY
}
public enum TransitionType {
USCXML_TRANS_SPONTANEOUS,
USCXML_TRANS_TARGETLESS,
USCXML_TRANS_INTERNAL,
USCXML_TRANS_HISTORY,
USCXML_TRANS_INITIAL
}
public abstract class State {
String name;
int parent;
BitSet children;
BitSet completion;
BitSet ancestors;
Data data;
StateType type;
public abstract void onEntry() throws InterpreterException;
public abstract void onExit() throws InterpreterException;
public abstract void invoke(Invoke invoker, boolean invoke) throws InterpreterException;
}
public abstract class Transition {
int source;
BitSet target;
String event;
String condition;
TransitionType type;
BitSet conflicts;
BitSet exitSet;
public abstract boolean isEnabled();
public abstract boolean isMatched();
public abstract void onTransition();
}
public class Data {
String id;
String src;
String expr;
String content;
}
public class Assign {
String location;
String expr;
String content;
}
public class Foreach {
String array;
String item;
String index;
}
public class Param {
String name;
String expr;
String location;
}
public class DoneData {
int source;
String content;
String contentExpr;
List<Param> params;
}
public abstract class Invoke {
StateChart machine;
String type;
String typeExpr;
String src;
String srcExpr;
String id;
String idlocation;
String sourceName;
String namelist;
boolean autoForward;
String content;
String contentExpr;
List<Param> params;
public abstract void finalize();
}
public class Send {
String event;
String eventExpr;
String target;
String targetExpr;
String type;
String typeExpr;
String id;
String idlocation;
String delay;
String delayExpr;
String namelist;
String content;
String contentExpr;
List<Param> params;
}
public List<Transition> transitions;
public List<State> states;
public Deque<Object> externalQueue;
public Deque<Object> internalQueue;
protected InterpreterState state = InterpreterState.USCXML_UNDEF;
protected Object event;
protected BitSet flags;
protected BitSet config;
protected BitSet history;
protected BitSet invocations;
protected BitSet initializedData;
protected Map<String, Integer> stateNamesToIndex;
public InterpreterState step() throws org.uscxml.InterpreterException {
return step(0);
}
public InterpreterState step(long blockMs) throws org.uscxml.InterpreterException {
/** Here you would implement microstep(T) as in the book chapter */
/** Just to silence the compiler warning */
if (true) throw new InterpreterException("", "");
return state;
}
public void cancel() {
state = InterpreterState.USCXML_CANCELLED;
}
public void reset() {
history.clear();
config.clear();
flags.clear();
// @TODO: uninvoke any invokers
invocations.clear();
}
public InterpreterState getState() { return state; }
public boolean isInState(String stateId) {
if (!stateNamesToIndex.containsKey(stateId))
return false;
return config.get((int) stateNamesToIndex.get(stateId));
}
public void receive(Object event) {
externalQueue.addLast(event);
}
protected Object dequeueInternal() {
try {
return internalQueue.removeLast();
} catch(Exception e) {
return null;
}
}
protected Object dequeueExternal() {
try {
return externalQueue.removeLast();
} catch(Exception e) {
return null;
}
}
public abstract boolean isTrue(String expression);
public abstract void raiseDoneEvent(State state, DoneData doneData);
public abstract void execContentLog(String label, String expression);
public abstract void execContentRaise(String event);
public abstract void execContentSend(Send send);
public abstract void execContentForeachInit(Foreach foreach);
public abstract void execContentForeachNext(Foreach foreach);
public abstract void execContentForeachDone(Foreach foreach);
public abstract void execContentAssign(Assign assign);
public abstract void execContentInit(Data data);
public abstract void execContentCancel(String sendId, String sendIdExpr);
public abstract void execContentScript(String src, String content);
public abstract void execContentFinalize(Invoke invoker, Object event);
}
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