/// <summary>
        /// Process Allocation (does not update line).
        /// - Update and Link Invoice/Payment/Cash
        /// </summary>
        /// <param name="reverse">reverse if true allocation is reversed</param>
        /// <returns>C_BPartner_ID</returns>
        public int ProcessIt(bool reverse)
        {
            log.Fine("Reverse=" + reverse + " - " + ToString());
            int C_Invoice_ID = GetC_Invoice_ID();
            MInvoicePaySchedule invoiceSchedule = null;
            MPayment            payment         = null;
            MCashLine           cashLine        = null;
            MInvoice            invoice         = GetInvoice();

            if (invoice != null &&
                GetC_BPartner_ID() != invoice.GetC_BPartner_ID())
            {
                SetC_BPartner_ID(invoice.GetC_BPartner_ID());
            }
            //
            int C_Payment_ID  = GetC_Payment_ID();
            int C_CashLine_ID = GetC_CashLine_ID();

            //	Update Payment
            if (C_Payment_ID != 0)
            {
                payment = new MPayment(GetCtx(), C_Payment_ID, Get_TrxName());
                if (GetC_BPartner_ID() != payment.GetC_BPartner_ID())
                {
                    log.Warning("C_BPartner_ID different - Invoice=" + GetC_BPartner_ID() + " - Payment=" + payment.GetC_BPartner_ID());
                }
                if (reverse)
                {
                    if (!payment.IsCashTrx())
                    {
                        payment.SetIsAllocated(false);
                        payment.Save();
                    }
                }
                else
                {
                    if (payment.TestAllocation())
                    {
                        payment.Save();
                    }
                }
            }

            //	Update Cash Journal
            if (C_CashLine_ID != 0)
            {
                cashLine = new MCashLine(GetCtx(), C_CashLine_ID, Get_TrxName());
                if (GetC_BPartner_ID() != cashLine.GetC_BPartner_ID())
                {
                    log.Warning("C_BPartner_ID different - Invoice=" + GetC_BPartner_ID() + " - CashJournal=" + cashLine.GetC_BPartner_ID());
                }
                if (reverse)
                {
                    cashLine.SetIsAllocated(false);
                    if (!cashLine.Save(Get_Trx()))
                    {
                        ValueNamePair pp = VLogger.RetrieveError();
                        log.Log(Level.SEVERE, "Error found for updating cashLine  for  this Line ID = " + cashLine.GetC_CashLine_ID() +
                                " Error Name is " + pp.GetName() + " And Error Type is " + pp.GetType());
                    }
                }
            }

            //	Payment - Invoice
            if (C_Payment_ID != 0 && invoice != null)
            {
                //	Link to Invoice
                if (reverse)
                {
                    invoice.SetC_Payment_ID(0);
                    log.Fine("C_Payment_ID=" + C_Payment_ID
                             + " Unlinked from C_Invoice_ID=" + C_Invoice_ID);
                }
                else if (invoice.IsPaid())
                {
                    invoice.SetC_Payment_ID(C_Payment_ID);
                    log.Fine("C_Payment_ID=" + C_Payment_ID
                             + " Linked to C_Invoice_ID=" + C_Invoice_ID);
                }

                //	Link to Order
                String update = "UPDATE C_Order o "
                                + "SET C_Payment_ID="
                                + (reverse ? "NULL " : "(SELECT C_Payment_ID FROM C_Invoice WHERE C_Invoice_ID=" + C_Invoice_ID + ") ")
                                + "WHERE EXISTS (SELECT * FROM C_Invoice i "
                                + "WHERE o.C_Order_ID=i.C_Order_ID AND i.C_Invoice_ID=" + C_Invoice_ID + ")";
                if (DataBase.DB.ExecuteQuery(update, null, Get_TrxName()) > 0)
                {
                    log.Fine("C_Payment_ID=" + C_Payment_ID
                             + (reverse ? " UnLinked from" : " Linked to")
                             + " order of C_Invoice_ID=" + C_Invoice_ID);
                }
            }

            //	Cash - Invoice
            if (C_CashLine_ID != 0 && invoice != null)
            {
                //	Link to Invoice
                if (reverse)
                {
                    invoice.SetC_CashLine_ID(0);
                    log.Fine("C_CashLine_ID=" + C_CashLine_ID
                             + " Unlinked from C_Invoice_ID=" + C_Invoice_ID);
                    // Set isallocated false on cashline while allocation gets deallocated assigned by Mukesh sir on 27/12/2017
                    //MCashLine cashline = new MCashLine(GetCtx(), GetC_CashLine_ID(), Get_TrxName());
                    //cashline.SetIsAllocated(false);
                    //cashline.Save();
                }
                else
                {
                    invoice.SetC_CashLine_ID(C_CashLine_ID);
                    log.Fine("C_CashLine_ID=" + C_CashLine_ID
                             + " Linked to C_Invoice_ID=" + C_Invoice_ID);
                }

                //	Link to Order
                String update = "UPDATE C_Order o "
                                + "SET C_CashLine_ID="
                                + (reverse ? "NULL " : "(SELECT C_CashLine_ID FROM C_Invoice WHERE C_Invoice_ID=" + C_Invoice_ID + ") ")
                                + "WHERE EXISTS (SELECT * FROM C_Invoice i "
                                + "WHERE o.C_Order_ID=i.C_Order_ID AND i.C_Invoice_ID=" + C_Invoice_ID + ")";
                if (DataBase.DB.ExecuteQuery(update, null, Get_TrxName()) > 0)
                {
                    log.Fine("C_CashLine_ID=" + C_CashLine_ID
                             + (reverse ? " UnLinked from" : " Linked to")
                             + " order of C_Invoice_ID=" + C_Invoice_ID);
                }
            }

            if (GetGL_JournalLine_ID() != 0 && reverse)
            {
                // set allocation as false on View Allocation reversal
                DB.ExecuteQuery(@" UPDATE GL_JOURNALLINE SET isAllocated ='N' WHERE GL_JOURNALLINE_ID =" + GetGL_JournalLine_ID(), null, Get_TrxName());
            }
            // Added by Bharat- Update Discrepancy amount on Invoice.

            if (C_Payment_ID == 0 && C_CashLine_ID == 0 && invoice != null)
            {
                if (invoice.Get_ColumnIndex("DiscrepancyAmt") >= 0)
                {
                    decimal desAmt     = invoice.GetDiscrepancyAmt();
                    decimal desAjusted = invoice.GetDiscrepancyAdjusted();
                    decimal allocAmt   = Math.Abs(GetAmount()); //	absolute
                    if (reverse)
                    {
                        if (allocAmt > desAjusted)
                        {
                            desAmt     = Decimal.Add(desAjusted, desAmt);
                            desAjusted = 0;
                        }
                        else
                        {
                            desAmt     = Decimal.Add(desAmt, allocAmt);
                            desAjusted = Decimal.Subtract(desAjusted, allocAmt);
                        }

                        invoice.SetDiscrepancyAmt(desAmt);
                        invoice.SetDiscrepancyAdjusted(desAjusted);
                        if (desAmt > 0)
                        {
                            invoice.SetIsInDispute(true);
                        }
                    }
                    else
                    {
                        if (allocAmt > desAmt)
                        {
                            desAjusted = Decimal.Add(desAjusted, desAmt);
                            desAmt     = 0;
                        }
                        else
                        {
                            desAjusted = Decimal.Add(desAjusted, allocAmt);
                            desAmt     = Decimal.Subtract(desAmt, allocAmt);
                        }
                        invoice.SetDiscrepancyAmt(desAmt);
                        invoice.SetDiscrepancyAdjusted(desAjusted);
                        if (desAmt == 0)
                        {
                            invoice.SetIsInDispute(false);
                        }
                    }
                    if (!invoice.Save())
                    {
                        log.Log(Level.SEVERE, "Invoice not updated - " + invoice);
                    }
                }
            }

            //	Update Balance / Credit used - Counterpart of MInvoice.completeIt
            if (invoice != null)
            {
                if (invoice.TestAllocation() && !invoice.Save())
                {
                    log.Log(Level.SEVERE, "Invoice not updated - " + invoice);
                }
                else if (reverse)
                {
                    // added by Amit
                    // if payment Management module downloaded and Invoice Schedule id available on Allocation then mark ispaid on schedule as false
                    if (Env.IsModuleInstalled("VA009_"))
                    {
                        MAllocationHdr allocHdr = new MAllocationHdr(GetCtx(), GetC_AllocationHdr_ID(), Get_Trx());
                        decimal        payAmt   = 0;
                        MDocType       doctype  = null;
                        MCurrency      currency = new MCurrency(GetCtx(), invoice.GetC_Currency_ID(), null);
                        if (GetC_InvoicePaySchedule_ID() != 0 && !invoice.IsPaid())
                        {
                            invoiceSchedule = new MInvoicePaySchedule(GetCtx(), GetC_InvoicePaySchedule_ID(), Get_TrxName());
                            invoiceSchedule.SetVA009_IsPaid(false);
                            // when we update schedule paid as False, then update payment method and related fields on schedule as on Invoice Header
                            if (reverse)
                            {
                                invoiceSchedule.SetVA009_PaymentMethod_ID(invoice.GetVA009_PaymentMethod_ID());
                                DataSet dsPaymentMethod = DB.ExecuteDataset(@"SELECT VA009_PaymentMode, VA009_PaymentType, VA009_PaymentTrigger FROM VA009_PaymentMethod
                                          WHERE IsActive = 'Y' AND  VA009_PaymentMethod_ID = " + invoice.GetVA009_PaymentMethod_ID(), null, Get_Trx());
                                if (dsPaymentMethod != null && dsPaymentMethod.Tables.Count > 0 && dsPaymentMethod.Tables[0].Rows.Count > 0)
                                {
                                    if (!String.IsNullOrEmpty(Util.GetValueOfString(dsPaymentMethod.Tables[0].Rows[0]["VA009_PaymentMode"])))
                                    {
                                        invoiceSchedule.SetVA009_PaymentMode(Util.GetValueOfString(dsPaymentMethod.Tables[0].Rows[0]["VA009_PaymentMode"]));
                                    }
                                    if (!String.IsNullOrEmpty(Util.GetValueOfString(dsPaymentMethod.Tables[0].Rows[0]["VA009_PaymentType"])))
                                    {
                                        invoiceSchedule.SetVA009_PaymentType(Util.GetValueOfString(dsPaymentMethod.Tables[0].Rows[0]["VA009_PaymentType"]));
                                    }
                                    invoiceSchedule.SetVA009_PaymentTrigger(Util.GetValueOfString(dsPaymentMethod.Tables[0].Rows[0]["VA009_PaymentTrigger"]));
                                }
                                dsPaymentMethod = null;
                            }
                            if (reverse && payment != null)
                            {
                                #region Handle for Payment & Invoice Allocation
                                doctype = new MDocType(GetCtx(), invoice.GetC_DocType_ID(), null);

                                // convert (payment amount / Amount from View Allocation) to invoice currency amount then subtract Paid invoice amount to calculated amount
                                if (doctype.GetDocBaseType() == "ARC" || doctype.GetDocBaseType() == "APC")
                                {
                                    if (payment.GetC_Invoice_ID() != 0)
                                    {
                                        // when payment created with invoice refernce direct
                                        // convert payment amount in invoice amt with payment date and payment conversion type
                                        payAmt = MConversionRate.Convert(GetCtx(), Decimal.Negate(Decimal.Add(Decimal.Add((payment.GetPayAmt() +
                                                                                                                           (payment.Get_ColumnIndex("BackupWithholdingAmount") >= 0 ? (payment.GetWithholdingAmt() + payment.GetBackupWithholdingAmount()) : 0)), payment.GetDiscountAmt()),
                                                                                                              payment.GetWriteOffAmt())), payment.GetC_Currency_ID(), invoice.GetC_Currency_ID(), payment.GetDateAcct(),
                                                                         payment.GetC_ConversionType_ID(), GetAD_Client_ID(), GetAD_Org_ID());
                                    }
                                    else
                                    {
                                        // when payment created with Payment Allocate entry OR
                                        // when we match payment with invoice through Payment Allocation form
                                        // convert payment amount in invoice amt with view allocation date
                                        payAmt = MConversionRate.Convert(GetCtx(), Decimal.Negate(Decimal.Add(Decimal.Add(GetAmount(), GetDiscountAmt()),
                                                                                                              GetWriteOffAmt())), allocHdr.GetC_Currency_ID(), invoice.GetC_Currency_ID(), allocHdr.GetDateAcct(),
                                                                         invoice.GetC_ConversionType_ID(), GetAD_Client_ID(), GetAD_Org_ID());
                                        if (doctype.GetDocBaseType() == "APC")
                                        {
                                            payAmt = Decimal.Negate(payAmt);
                                        }
                                    }
                                }
                                else
                                {
                                    if (payment.GetC_Invoice_ID() != 0)
                                    {
                                        // when we create payment with invoice reference direct
                                        // convert payment amount in invoice amt with payment date and payment conversion type
                                        payAmt = MConversionRate.Convert(GetCtx(), Decimal.Add(Decimal.Add((payment.GetPayAmt() +
                                                                                                            (payment.Get_ColumnIndex("BackupWithholdingAmount") >= 0 ? (payment.GetWithholdingAmt() + payment.GetBackupWithholdingAmount()) : 0)), payment.GetDiscountAmt()),
                                                                                               payment.GetWriteOffAmt()), payment.GetC_Currency_ID(), invoice.GetC_Currency_ID(), payment.GetDateAcct(),
                                                                         payment.GetC_ConversionType_ID(), GetAD_Client_ID(), GetAD_Org_ID());
                                    }
                                    else
                                    {
                                        // when payment created with Payment Allocate entry Or
                                        // when we match payment with invoice through Payment Allocation form
                                        // convert payment amount in invoice amt with view allocation date
                                        payAmt = MConversionRate.Convert(GetCtx(), Decimal.Add(Decimal.Add(GetAmount(), GetDiscountAmt()), GetWriteOffAmt()),
                                                                         allocHdr.GetC_Currency_ID(), invoice.GetC_Currency_ID(), allocHdr.GetDateAcct(), invoice.GetC_ConversionType_ID(),
                                                                         GetAD_Client_ID(), GetAD_Org_ID());
                                        if (doctype.GetDocBaseType() == "API")
                                        {
                                            payAmt = Decimal.Negate(payAmt);
                                        }
                                    }
                                }
                                invoiceSchedule.SetVA009_PaidAmntInvce(Decimal.Round(Decimal.Subtract(invoiceSchedule.GetVA009_PaidAmntInvce(), payAmt),
                                                                                     currency.GetStdPrecision()));

                                // during reversal, if Invoice paid amount <> 0 then reduce that amount from next schedule
                                try
                                {
                                    if (invoiceSchedule.GetVA009_PaidAmntInvce() != 0)
                                    {
                                        int no = Util.GetValueOfInt(DB.ExecuteQuery(@"UPDATE C_InvoicePaySchedule 
                                                                 SET VA009_PaidAmntInvce =   NVL(VA009_PaidAmntInvce , 0) + " + Decimal.Round(invoiceSchedule.GetVA009_PaidAmntInvce(), currency.GetStdPrecision()) +
                                                                                    @" , VA009_PaidAmnt =  NVL(VA009_PaidAmnt , 0) + " + Decimal.Round(MConversionRate.ConvertBase(GetCtx(), invoiceSchedule.GetVA009_PaidAmntInvce(), invoice.GetC_Currency_ID(), invoice.GetDateAcct(), invoice.GetC_ConversionType_ID(), GetAD_Client_ID(), GetAD_Org_ID()), currency.GetStdPrecision()) +
                                                                                    @" WHERE C_InvoicePaySchedule_ID = ( SELECT MIN(C_InvoicePaySchedule_ID) FROM C_InvoicePaySchedule WHERE IsActive = 'Y'
                                                                 AND VA009_IsPaid = 'N' AND C_Invoice_ID = " + invoice.GetC_Invoice_ID() +
                                                                                    @" AND C_InvoicePaySchedule_ID <> " + GetC_InvoicePaySchedule_ID() + " ) ", null, Get_Trx()));

                                        // set paid invoice amount = 0, no > 0 bcz this is not last schedule
                                        if (no > 0)
                                        {
                                            invoiceSchedule.SetVA009_PaidAmntInvce(0);
                                        }
                                    }
                                }
                                catch { }

                                // convert invoice paid amount to base currency amount
                                invoiceSchedule.SetVA009_PaidAmnt(Decimal.Round(MConversionRate.ConvertBase(GetCtx(), invoiceSchedule.GetVA009_PaidAmntInvce(),
                                                                                                            invoice.GetC_Currency_ID(), invoice.GetDateAcct(), invoice.GetC_ConversionType_ID(), GetAD_Client_ID(), GetAD_Org_ID()),
                                                                                currency.GetStdPrecision()));

                                // set Currency Variance amount as 0, when we reverse paymnet/ cash journalor allocation against this schedule
                                invoiceSchedule.SetVA009_Variance(0);

                                // remove linking of Payment from schedule
                                invoiceSchedule.SetC_Payment_ID(0);

                                #endregion
                            }
                            else if (reverse && C_CashLine_ID > 0)
                            {
                                #region Handle fo Cash Journal & Invoice Allocation

                                doctype  = new MDocType(GetCtx(), invoice.GetC_DocType_ID(), null);
                                cashLine = new MCashLine(GetCtx(), C_CashLine_ID, Get_Trx());

                                // convert cash amount to invoice currency amount with allocation date then subtract Paid invoice amount to calculated amount
                                if (doctype.GetDocBaseType() == "ARC" || doctype.GetDocBaseType() == "API")
                                {
                                    payAmt = Decimal.Negate(Decimal.Add(Decimal.Add(GetAmount(), GetDiscountAmt()), GetWriteOffAmt()));
                                    payAmt = MConversionRate.Convert(GetCtx(), payAmt, allocHdr.GetC_Currency_ID(), invoice.GetC_Currency_ID(), allocHdr.GetDateAcct(),
                                                                     invoice.GetC_ConversionType_ID(), GetAD_Client_ID(), GetAD_Org_ID());
                                    invoiceSchedule.SetVA009_PaidAmntInvce(Decimal.Round(Decimal.Subtract(invoiceSchedule.GetVA009_PaidAmntInvce(), payAmt),
                                                                                         currency.GetStdPrecision()));
                                }
                                else
                                {
                                    payAmt = Decimal.Add(Decimal.Add(GetAmount(), GetDiscountAmt()), GetWriteOffAmt());
                                    payAmt = MConversionRate.Convert(GetCtx(), payAmt, allocHdr.GetC_Currency_ID(), invoice.GetC_Currency_ID(), allocHdr.GetDateAcct(),
                                                                     invoice.GetC_ConversionType_ID(), GetAD_Client_ID(), GetAD_Org_ID());
                                    invoiceSchedule.SetVA009_PaidAmntInvce(Decimal.Round(Decimal.Subtract(invoiceSchedule.GetVA009_PaidAmntInvce(), payAmt),
                                                                                         currency.GetStdPrecision()));
                                }

                                // during reversal, if Invoice paid amount <> 0 then reduce that amount from next schedule
                                try
                                {
                                    if (invoiceSchedule.GetVA009_PaidAmntInvce() != 0)
                                    {
                                        int no = Util.GetValueOfInt(DB.ExecuteQuery(@"UPDATE C_InvoicePaySchedule 
                                                                 SET VA009_PaidAmntInvce =   NVL(VA009_PaidAmntInvce , 0) + " + Decimal.Round(invoiceSchedule.GetVA009_PaidAmntInvce(), currency.GetStdPrecision()) +
                                                                                    @" , VA009_PaidAmnt =  NVL(VA009_PaidAmnt , 0) + " + Decimal.Round(MConversionRate.ConvertBase(GetCtx(), invoiceSchedule.GetVA009_PaidAmntInvce(), invoice.GetC_Currency_ID(), invoice.GetDateAcct(), invoice.GetC_ConversionType_ID(), GetAD_Client_ID(), GetAD_Org_ID()), currency.GetStdPrecision()) +
                                                                                    @" WHERE C_InvoicePaySchedule_ID = ( SELECT MIN(C_InvoicePaySchedule_ID) FROM C_InvoicePaySchedule WHERE IsActive = 'Y'
                                                                 AND VA009_IsPaid = 'N' AND C_Invoice_ID = " + invoice.GetC_Invoice_ID() +
                                                                                    @" AND C_InvoicePaySchedule_ID <> " + GetC_InvoicePaySchedule_ID() + " ) ", null, Get_Trx()));

                                        // set paid invoice amount = 0, no > 0 bcz this is not last schedule
                                        if (no > 0)
                                        {
                                            invoiceSchedule.SetVA009_PaidAmntInvce(0);
                                        }
                                    }
                                }
                                catch { }

                                // convert invoice paid amount to base currency amount
                                invoiceSchedule.SetVA009_PaidAmnt(Decimal.Round(MConversionRate.ConvertBase(GetCtx(), invoiceSchedule.GetVA009_PaidAmntInvce(),
                                                                                                            invoice.GetC_Currency_ID(), invoice.GetDateAcct(), invoice.GetC_ConversionType_ID(), GetAD_Client_ID(), GetAD_Org_ID()),
                                                                                currency.GetStdPrecision()));

                                // set Currency Variance amount as 0, when we reverse paymnet/ cash journalor allocation against this schedule
                                invoiceSchedule.SetVA009_Variance(0);

                                // remove linking of cash line from schedule
                                invoiceSchedule.SetC_CashLine_ID(0);

                                #endregion
                            }
                            else
                            {
                                invoiceSchedule.SetVA009_PaidAmntInvce(0);
                                invoiceSchedule.SetVA009_PaidAmnt(0);
                                // set Currency Variance amount as 0, when we reverse paymnet/ cash journalor allocation against this schedule
                                invoiceSchedule.SetVA009_Variance(0);
                            }
                            if (!invoiceSchedule.Save(Get_TrxName()))
                            {
                                log.Log(Level.SEVERE, "Invoice Pay Schedule not updated - " + invoice);
                            }
                        }
                    }
                }
            }

            return(GetC_BPartner_ID());
        }