public override bool PreExecute(COMPUTATION_CONTEXT ctx)
{
TaxDTO td = (TaxDTO)ctx.Get("tax_cargo");
//--- Do Some Sanity Checks
//--- if some problems => return true;
return(base.PreExecute(ctx));
}
public bool Execute(COMPUTATION_CONTEXT ctx)
{
TaxDTO td = (TaxDTO)ctx.Get("tax_cargo");
td.taxparams.TaxLiability = 1000;
td.taxparams.Computed = true;
return(true);
}
public override bool Execute(COMPUTATION_CONTEXT ctx)
{
TaxDTO td = (TaxDTO)ctx.Get("tax_cargo");
//---- Compute the Tax for Senior Citizens
//---- They belong to different Slabs
td.taxparams.TaxLiability = 1500;
return(true);
}
public override bool Execute(COMPUTATION_CONTEXT ctx)
{
TaxDTO td = (TaxDTO)ctx.Get("tax_cargo");
//---- Compute the Tax for Others
//---- They belong to different Slabs
//----- After computation 5000 was assigned :)
td.taxparams.TaxLiability = 5000;
return(true);
}
public bool Execute(COMPUTATION_CONTEXT ctx)
{
TaxDTO td = (TaxDTO)ctx.Get("tax_cargo");
//---- Instead of computation, we are assigning
//---- constant tax for each arcetypes
td.taxparams.TaxLiability = 1000;
td.taxparams.Computed = true;
return(true);
}
public static bool Compute(TaxableEntity te)
{
string archetype = ComputeArchetype(te);
COMPUTATION_CONTEXT ctx = new COMPUTATION_CONTEXT();
TaxDTO td = new TaxDTO {
id = te.id, taxparams = te.taxparams
};
ctx.Put("tax_cargo", td);
return(CommandDispatcher.Dispatch(archetype, ctx));
}
public bool Execute(COMPUTATION_CONTEXT ctx)
{
TaxDTO td = (TaxDTO)ctx.Get("tax_cargo");
double accum = td.taxparams.Basic +
td.taxparams.DA + td.taxparams.Allowance +
td.taxparams.HRA;
double net = accum - td.taxparams.Deductions -
td.taxparams.Surcharge;
//---- Flat 10% Tax
td.taxparams.TaxLiability = net * 0.1;
td.taxparams.Computed = true;
return(true);
}
public override bool Execute(COMPUTATION_CONTEXT ctx)
{
TaxDTO td = (TaxDTO)ctx.Get("tax_cargo");
//---- Compute the Tax for Senior Females
//---- They belong to different Slabs
double accum = td.taxparams.Basic +
td.taxparams.DA + td.taxparams.Allowance +
td.taxparams.HRA;
double net = accum - td.taxparams.Deductions -
td.taxparams.Surcharge;
//---- Flat 10% Tax
td.taxparams.TaxLiability = net * 0.1;
return(true);
}
public static bool Dispatch(string archetype, COMPUTATION_CONTEXT ctx)
{
ComputationCommand cmd = obj.Get(archetype);
if (cmd == null)
{
return(false);
}
if (cmd.PreExecute(ctx))
{
bool rs = cmd.Execute(ctx);
cmd.PostExecute(ctx);
return(rs);
}
return(false);
}
public static bool Dispatch(string archetype, COMPUTATION_CONTEXT ctx)
{
if (archetype == "SeniorCitizen")
{
SeniorCitizenCommand cmd = new SeniorCitizenCommand();
return(cmd.Execute(ctx));
}
else if (archetype == "OrdinaryCitizen")
{
OrdinaryCitizenCommand cmd = new OrdinaryCitizenCommand();
return(cmd.Execute(ctx));
}
else
{
return(false);
}
}
public virtual bool Execute(COMPUTATION_CONTEXT ctx)
{
return(true);
}
public override bool PostExecute(COMPUTATION_CONTEXT ctx)
{
//--- Do the Check on Invariants
//--- Retrun false, if there is violation
return(base.PostExecute(ctx));
}
public static bool Dispatch(string archetype, COMPUTATION_CONTEXT ctx)
{
ComputationCommand cmd = obj.Get(archetype);
return((cmd == null) ? false : cmd.Execute(ctx));
}
