Hello Hameed,

As you don’t provide any example usage, I’m in the dark as to what this code is designed to accomplish. Apparently tangent and GrandFather can see the point to this approach, so there must be one; but...

It seems to me that you’ve come up with a complex and fragile way of simulating inheritance; and one which also has the disadvantage that each object duplicates the same redundant information. For example:

bless({
  ACT => "Purchase",
  ACTIVITIES => {
    Purchase => { datefield => "date_bought", func => "total_bought" }
+,
    Sale => { datefield => "date_sold", func => "total_sold" },
  },
}, "EOYStats")
[download]

Consider as an alternative the following skeleton code, which uses simple inheritance:

#! perl
use strict;
use warnings;

#---------------------------------------------------------------------
+---------
package EOYStats;
#---------------------------------------------------------------------
+---------

sub new
{
    my ($class) = @_;
    my  $this   = bless {}, $class;

    use Data::Dump;
    dd  $this;

    return $this;
}

sub do_something
{
    my ($this, $arg) = @_;

    print "EOYStats::do_something($arg)\n";
}

#---------------------------------------------------------------------
+---------
package EOYStats::Sale;
#---------------------------------------------------------------------
+---------

use parent -norequire, 'EOYStats';

sub get_stats
{
    my ($this, $arg) = @_;
    print "EOYStats::Sale::get_stats()\n";
    $this->do_something($arg);
}

#---------------------------------------------------------------------
+---------
package EOYStats::Purchase;
#---------------------------------------------------------------------
+---------

use parent -norequire, 'EOYStats';

sub get_stats
{
    my ($this, $arg) = @_;
    print "EOYStats::Purchase::get_stats($arg)\n";
    $this->do_something($arg);
}

#---------------------------------------------------------------------
+---------
package main;
#---------------------------------------------------------------------
+---------

my $obj = EOYStats::Purchase->new();
   $obj->get_stats('abc');
[download]

Output:

12:59 >perl 1034_SoPW.pl
bless({}, "EOYStats::Purchase")
EOYStats::Purchase::get_stats(abc)
EOYStats::do_something(abc)

13:09 >
[download]

Would this approach work for you? If so, I think you’ll find it simpler and more robust. And if not, an explanation of where it falls short will help to clarify the problem.

Hope that helps,

---

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