@Override
public int execute(Session session, SqshOptions options) throws Exception {
ConnectionContext conn = session.getConnectionContext();
if (conn == null) {
session.err.println("No connection established");
return 1;
}
List<String> vars = conn.getGlobals();
Collections.sort(vars);
ColumnDescription[] columns = new ColumnDescription[1];
columns[0] = new ColumnDescription("Global", -1);
Renderer renderer = session.getRendererManager().getCommandRenderer(session);
renderer.header(columns);
for (String var : vars) {
String row[] = new String[1];
row[0] = var;
renderer.row(row);
}
renderer.flush();
return 0;
}
/**
* Called when the user hits the completion key. See the javadoc for {@link
* org.gnu.readline.ReadlineCompleter} for how this method is induced.
*
* @param word The text up to the word break character.
* @param state 0=initial search request, >1 the request for the N'th completion entry.
*/
public String completer(String word, int state) {
/*
* A state greater than 0 indicates that the caller is in the
* process of iterating over our current result set.
*/
if (state > 0) {
if (completer != null) {
String c = completer.next();
if (c == null) {
completer = null;
}
return c;
}
return null;
}
/*
* The word that was found by our caller is not nearly enough
* to figure out the whole object name, so we will use the
* entire line to do our work.
*/
String wholeLine = Readline.getLineBuffer();
int position = wholeLine.length();
/*
* Now for the hard part. We need to try to figure out where
* the user is currently sitting in the line. There is a native
* readline call to do this, but it hasn't been exposed via JNI, so
* I'll try to make a guess m'self.
*/
if (word != null && word.length() > 0) {
/*
* Our logic to find the location of our word is to start at the
* end of the entire line and search backwards looking for it.
* When we find the word we ensure that the character previous
* to the word is one of the word separators that we declared
* in SqshContext.java. If it is not one of those characters
* we keep moving backwards.
*/
boolean done = false;
int idx = wholeLine.lastIndexOf(word);
while (!done && idx >= 0) {
if (idx == 0 || " \t,/.()<>=?".indexOf(wholeLine.charAt(idx - 1)) >= 0) {
done = true;
} else {
idx = wholeLine.lastIndexOf(word, idx - 1);
}
}
if (idx >= 0) {
idx += word.length();
position = idx;
}
}
Session session = sqshContext.getCurrentSession();
ConnectionContext conn = session.getConnectionContext();
if (conn != null) {
completer = conn.getTabCompleter(session, wholeLine, position, word);
} else {
completer = null;
}
if (completer == null) {
return null;
}
return completer.next();
}