This is still in a fairly early stage of development, but take a look at the module XML::LibXML::Augment which I'm developing. (Not on CPAN yet I'm afraid.)

The idea is that XML::LibXML already provides a nice object-oriented view of the data, but we can specialise each object to make it even better. So say we have some XML:

<employees xmlns="http://megacorp.example/">
  <person>
    <name>Alice</name>
    <salary>40000</salary>
    <bank_account number="10001234"/>
  </person>
  <person>
    <name>Bob</name>
    <salary>37500</salary>
    <bank_account number="10005678"/>
  </person>
</employees>

[download]

Normally the two <person> elements would be XML::LibXML::Element objects. With XML::LibXML::Augment, we create a subclass of XML::LibXML::Element and bind it to the namespace-qualified name {http://megacorp.example/}person. And then whenever we hit a <person> element in our document, our subclass is automatically used.

So we might write:

{
  package MegaCorp::Person;
  use XML::LibXML::Augment
    -names => ['{http://megacorp.example/}person'];

  sub get_salary {
    shift
      -> getElementsByTagName('salary')
      -> get_node(1)  # not zero-indexed!
      -> textContent;
  }

  sub get_bank_account {
    shift
      -> getElementsByTagName('bank_account')
      -> get_node(1);
  }

  sub pay_salary {
    my $self = shift;
    my $acct = $self->get_bank_account;
    $acct->accept_funds($self->get_salary);
  }
}

{
  package MegaCorp::BankAccount;
  use XML::LibXML::Augment
    -names => ['{http://megacorp.example/}bank_account'];

  sub accept_funds {
    ...
  }
}

{
  package main;
  
  use XML::LibXML::Augment;
  my $doc = XML::LibXML->load_xml(location => 'emp.xml');
  
  # Switch on augmentation for this document!
  XML::LibXML::Augment->upgrade($doc);

  my @employees = $doc->getElementsByTagName('person');
  $_->pay_salary for @employees;
}

[download]

If you think you'd like to give it a whirl, do get in touch with me! I'd love to have some extra people playing with it and reporting bugs and ideas for improvements.

perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

In reply to Re: Create OO object from XML by tobyink
in thread Create OO object from XML by Anonymous Monk

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