public IResultIterator getSecondaryIterator(ScriptContext context, String subQueryName)
throws DataException {
try {
Scriptable scope = null;
if (context != null)
scope =
((IDataScriptEngine) context.getScriptEngine(IDataScriptEngine.ENGINE_NAME))
.getJSScope(context);
return this.getSecondaryIterator(subQueryName, scope);
} catch (BirtException e) {
throw DataException.wrap(e);
}
}
/**
* Evaluate the given value
*
* @param value
* @param n
* @return
* @throws DataException
*/
public boolean evaluate(ScriptContext cx, Scriptable scope, DataSetRuntime dataSet)
throws DataException {
if (filterPassController.getForceReset()) {
doReset();
filterPassController.setForceReset(false);
}
if (N == -1) {
// Create a new evaluator
// Evaluate N (which is operand1) at this time
Object n_object = null;
try {
n_object = ExprEvaluateUtil.evaluateRawExpression2(n_expr, scope, cx, dataSet);
} catch (BirtException e1) {
throw DataException.wrap(e1);
}
double n_value = -1;
try {
n_value = DataTypeUtil.toDouble(n_object).doubleValue();
} catch (BirtException e) {
// conversion error
throw new DataException(ResourceConstants.INVALID_TOP_BOTTOM_ARGUMENT, e);
}
// First time; calculate N based on updated row count
if (n_percent) {
if (n_value < 0 || n_value > 100)
throw new DataException(ResourceConstants.INVALID_TOP_BOTTOM_PERCENT_ARGUMENT);
N = (int) Math.round(n_value / 100 * filterPassController.getRowCount());
} else {
if (n_value < 0) throw new DataException(ResourceConstants.INVALID_TOP_BOTTOM_N_ARGUMENT);
N = (int) n_value;
}
}
// Evaluate operand expression
Object value =
ScriptEvalUtil.evalExpr(op_expr, cx.newContext(scope), ScriptExpression.defaultID, 0);
if (filterPassController.getPassLevel() == FilterPassController.FIRST_PASS) {
return doFirstPass(value);
} else if (filterPassController.getPassLevel() == FilterPassController.SECOND_PASS) {
return doSecondPass();
}
return false;
}