Recently I gone through creating an extension class known as CoC for a DP for inserting some values for header and lines in purchase order confirmation report.
This will give you an idea how to extend methods. Please change it according to your requirement.
[ExtensionOf(classStr(PurchPurchaseOrderDP))]
final class PurchClass_PurchPurchaseOrderDP_Extension
{
protected PurchPurchaseOrderTmp initializeOrderLine(
PurchPurchaseOrderHeader _purchaseOrderHeader,
boolean _highlightUpdated,
PurchPurchaseOrderDPOrderLineQuerySelection _orderLineSelection)
{
PurchPurchaseOrderTmp purchPurchaseOrderTmp = next initializeOrderLine(_purchaseOrderHeader, _highlightUpdated, _orderLineSelection);
purchPurchaseOrderTmp.CustomInventBatchId = _orderLineSelection.parmPurchLineAllVersionsInventDim().inventBatchId;
purchPurchaseOrderTmp.Name = InventTable::find(purchPurchaseOrderTmp.ItemId).productName(‘en-us’);
return purchPurchaseOrderTmp;
}
protected PurchPurchaseOrderHeader initializePurchaseOrderHeader(VendPurchOrderJour _vendPurchOrderJour)
{
PurchPurchaseOrderHeader purchPurchaseOrderHeader = next initializePurchaseOrderHeader(_vendPurchOrderJour);
PurchTable purchTable = _vendPurchOrderJour.purchTable();
purchPurchaseOrderHeader.CustomPurchId = purchTable.PurchId;
purchPurchaseOrderHeader.CustomVendName = purchTable.PurchName;
return purchPurchaseOrderHeader;
}
}