private boolean isConnected(NodeOrRelationship current, TypedId newId) throws ShellException {
if (current.isNode()) {
Node currentNode = current.asNode();
for (Relationship rel : currentNode.getRelationships()) {
if (newId.isNode()) {
if (rel.getOtherNode(currentNode).getId() == newId.getId()) {
return true;
}
} else {
if (rel.getId() == newId.getId()) {
return true;
}
}
}
} else {
if (newId.isRelationship()) {
return false;
}
Relationship relationship = current.asRelationship();
if (relationship.getStartNode().getId() == newId.getId()
|| relationship.getEndNode().getId() == newId.getId()) {
return true;
}
}
return false;
}
@Override
public List<String> completionCandidates(String partOfLine, Session session) {
String lastWord = TextUtil.lastWordOrQuoteOf(partOfLine, false);
if (lastWord.startsWith("-")) {
return super.completionCandidates(partOfLine, session);
}
try {
TreeSet<String> result = new TreeSet<String>();
NodeOrRelationship current = getCurrent(session);
if (current.isNode()) {
// TODO Check if -r is supplied
Node node = current.asNode();
for (Node otherNode : RelationshipToNodeIterable.wrap(node.getRelationships(), node)) {
long otherNodeId = otherNode.getId();
String title = findTitle(getServer(), session, otherNode);
if (title != null) {
if (!result.contains(title)) {
maybeAddCompletionCandidate(result, title + "," + otherNodeId, lastWord);
}
}
maybeAddCompletionCandidate(result, "" + otherNodeId, lastWord);
}
} else {
maybeAddCompletionCandidate(result, START_ALIAS, lastWord);
maybeAddCompletionCandidate(result, END_ALIAS, lastWord);
Relationship rel = current.asRelationship();
maybeAddCompletionCandidate(result, "" + rel.getStartNode().getId(), lastWord);
maybeAddCompletionCandidate(result, "" + rel.getEndNode().getId(), lastWord);
}
return new ArrayList<String>(result);
} catch (ShellException e) {
e.printStackTrace();
return super.completionCandidates(partOfLine, session);
}
}
@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;
}
/**
* @param server the {@link GraphDatabaseShellServer} to run at.
* @param session the {@link Session} used by the client.
* @param thing the thing to get the name-representation for.
* @return the display name for a {@link Node}.
*/
public static String getDisplayName(
GraphDatabaseShellServer server,
Session session,
NodeOrRelationship thing,
boolean checkForMe)
throws ShellException {
if (thing.isNode()) {
return getDisplayName(server, session, thing.asNode(), checkForMe);
} else {
return getDisplayName(server, session, thing.asRelationship(), true, checkForMe);
}
}