/**
* Return a completly separated copy of this function. The copy does no longer share any
* changeable objects with the original function.
*
* @return a copy of this function.
*/
public Expression getInstance() {
final IndexDataGeneratorFunction instance = (IndexDataGeneratorFunction) super.getInstance();
instance.model = new TypedTableModel();
instance.pageFunction = (PageFunction) pageFunction.getInstance();
instance.dataFormula = (FormulaExpression) dataFormula.getInstance();
instance.dataStorage = new TreeMap<String, IndexDataHolder>();
instance.initialized = false;
return instance;
}
/**
* Clones the expression. The expression should be reinitialized after the cloning.
*
* <p>Expressions maintain no state, cloning is done at the beginning of the report processing to
* disconnect the expression from any other object space.
*
* @return a clone of this expression.
* @throws CloneNotSupportedException this should never happen.
*/
public Object clone() throws CloneNotSupportedException {
final IndexDataGeneratorFunction o = (IndexDataGeneratorFunction) super.clone();
o.dataFormula = (FormulaExpression) dataFormula.clone();
o.pageFunction = (PageFunction) pageFunction.clone();
return o;
}
