public final Diagram createSystem(UmlSource source) {
final IteratorCounter2 it = source.iterator2();
final CharSequence2 startLine = it.next();
if (StartUtils.isArobaseStartDiagram(startLine) == false) {
throw new UnsupportedOperationException();
}
if (source.isEmpty()) {
return buildEmptyError(source, startLine.getLocation());
}
AbstractPSystem sys = createEmptyDiagram();
while (it.hasNext()) {
if (StartUtils.isArobaseEndDiagram(it.peek())) {
if (sys == null) {
return null;
}
final String err = sys.checkFinalError();
if (err != null) {
return buildEmptyError(source, err, it.peek().getLocation());
}
if (source.getTotalLineCount() == 2) {
return buildEmptyError(source, it.peek().getLocation());
}
sys.makeDiagramReady();
if (sys.isOk() == false) {
return null;
}
sys.setSource(source);
return sys;
}
sys = executeOneLine(sys, source, it);
if (sys instanceof PSystemError) {
return sys;
}
}
sys.setSource(source);
return sys;
}
