// Extract all quotes from the quote bundle which cause the given
// expression to equate to true. If there is no expression (string is null or
// empty) then extract all the quotes.
private List extractQuotesUsingRule(String filterExpression, EODQuoteBundle quoteBundle) {
// If there is no rule, then just return all quotes
if (filterExpression == null || filterExpression.length() == 0)
return extractAllQuotes(quoteBundle);
// First parse the expression
Expression expression = null;
try {
expression = Parser.parse(filterExpressionString);
} catch (ExpressionException e) {
// We should have already checked the string for errors before here
assert false;
}
// Add symbols to list when expression proves true
ArrayList quotes = new ArrayList();
Iterator iterator = quoteBundle.iterator();
TradingDate lastDate = quoteBundle.getLastDate();
try {
// Traverse all symbols on all dates
while (iterator.hasNext()) {
Quote quote = (Quote) iterator.next();
Symbol symbol = quote.getSymbol();
TradingDate date = quote.getDate();
int dateOffset = 0;
try {
dateOffset = quoteBundle.dateToOffset(date);
} catch (WeekendDateException e) {
assert false;
}
if (!singleDate || (lastDate.equals(quote.getDate()))) {
if (expression.evaluate(new Variables(), quoteBundle, symbol, dateOffset)
>= Expression.TRUE_LEVEL) quotes.add(quote);
}
}
return quotes;
} catch (EvaluationException e) {
// Tell user expression didnt evaluate properly
JOptionPane.showInternalMessageDialog(
DesktopManager.getDesktop(),
e.getReason() + ": " + expression.toString(),
Locale.getString("ERROR_EVALUATION_EQUATION"),
JOptionPane.ERROR_MESSAGE);
// delete erroneous expression
expression = null;
// If the expression didn't evaluate then just return all the quotes
return extractAllQuotes(quoteBundle);
}
}
/**
* Return the window title.
*
* @return the window title
*/
public String getTitle() {
// Title depends on the quote bundle we are listing
String title = Locale.getString("TABLE_OF", quoteBundle.getQuoteRange().getDescription());
// If there is only one date it makes sense to tell the user it
if (singleDate)
title = title.concat(" (" + quoteBundle.getLastDate().toString("dd/mm/yyyy") + ")");
return title;
}
// This function extracts all quotes from the quote bundle and returns
// them as a list of Quotes.
private List extractAllQuotes(EODQuoteBundle quoteBundle) {
List quotes = new ArrayList();
Iterator iterator = quoteBundle.iterator();
TradingDate lastDate = quoteBundle.getLastDate();
// Traverse all symbols on all dates
while (iterator.hasNext()) {
Quote quote = (Quote) iterator.next();
if (!singleDate || (lastDate.equals(quote.getDate()))) quotes.add(quote);
}
return quotes;
}
/**
* Create a new module that only lists the quotes in the given bundle where the filter expression
* returns true. Set the <code>singleDate</code> flag if you want to display a single day's
* trading - and don't want to display the quotes from the bundle that may appear from executing
* some expressions. (e.g. comparing today's prices to yesterdays).
*
* @param quoteBundle quotes to table
* @param filterExpressionString expression string to filter by
* @param singleDate if this is set to true then only display the quotes on the last date in the
* quote bundle, otherwise display them all.
*/
public QuoteModule(
EODQuoteBundle quoteBundle, String filterExpressionString, boolean singleDate) {
this.filterExpressionString = filterExpressionString;
this.quoteBundle = quoteBundle;
this.singleDate = singleDate;
propertySupport = new PropertyChangeSupport(this);
// Get list of quotes to display
List quotes = extractQuotesUsingRule(filterExpressionString, quoteBundle);
// If we are listing stocks on a single day then don't bother showing
// the date column. On the other hand if we are only listing a single
// stock then don't bother showing the symbol column
model =
new EODQuoteModel(
quoteBundle,
quotes,
singleDate ? Column.HIDDEN : Column.VISIBLE,
quoteBundle.getAllSymbols().size() == 1 ? Column.HIDDEN : Column.VISIBLE);
setModel(
model,
quoteBundle.getAllSymbols().size() == 1
? EODQuoteModel.DATE_COLUMN
: EODQuoteModel.ACTIVITY_COLUMN,
SORT_UP);
model.addTableModelListener(this);
showColumns(model);
resort();
addMenu();
// If the user clicks on the table trap it.
addMouseListener(
new MouseAdapter() {
public void mouseClicked(MouseEvent evt) {
handleMouseClicked(evt);
}
});
// Set up DND
// dragSource = DragSource.getDefaultDragSource();
// dragGestureListener = new DragGestureListener();
// dragSourceListener = new DragSourceListener();
// component, action, listener
// dragSource.createDefaultDragGestureRecognizer(this,
// DnDConstants.ACTION_COPY,
// dgListener);
}