@Override
protected String exec(AppCommandParser parser, Session session, Output out)
throws ShellException, RemoteException {
List<TypedId> paths = readCurrentWorkingDir(session);
NodeOrRelationship current = getCurrent(session);
NodeOrRelationship newThing = null;
if (parser.arguments().isEmpty()) {
newThing = NodeOrRelationship.wrap(getServer().getDb().getReferenceNode());
paths.clear();
} else {
String arg = parser.arguments().get(0);
TypedId newId = current.getTypedId();
if (arg.equals("..")) {
if (paths.size() > 0) {
newId = paths.remove(paths.size() - 1);
}
} else if (arg.equals(".")) {
} else if (arg.equals(START_ALIAS) || arg.equals(END_ALIAS)) {
newId = getStartOrEnd(current, arg);
paths.add(current.getTypedId());
} else {
long suppliedId = -1;
try {
suppliedId = Long.parseLong(arg);
} catch (NumberFormatException e) {
suppliedId = findNodeWithTitle(current.asNode(), arg, session);
if (suppliedId == -1) {
throw new ShellException("No connected node with title '" + arg + "'");
}
}
newId =
parser.options().containsKey("r")
? new TypedId(NodeOrRelationship.TYPE_RELATIONSHIP, suppliedId)
: new TypedId(NodeOrRelationship.TYPE_NODE, suppliedId);
if (newId.equals(current.getTypedId())) {
throw new ShellException("Can't cd to where you stand");
}
boolean absolute = parser.options().containsKey("a");
if (!absolute && !this.isConnected(current, newId)) {
throw new ShellException(
getDisplayName(getServer(), session, newId, false)
+ " isn't connected to the current primitive,"
+ " use -a to force it to go there anyway");
}
paths.add(current.getTypedId());
}
newThing = this.getThingById(newId);
}
setCurrent(session, newThing);
writeCurrentWorkingDir(paths, session);
return null;
}
protected static void setCurrent(Session session, NodeOrRelationship current) {
session.set(CURRENT_KEY, current.getTypedId().toString());
}
public static boolean isCurrent(Session session, NodeOrRelationship thing) {
String currentThing = (String) session.get(CURRENT_KEY);
return currentThing != null && currentThing.equals(thing.getTypedId().toString());
}