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lib/AI/Categorizer/Document/XML.pm  view on Meta::CPAN

# Output: object of this class
# Description: this is constructor
sub new{
  my ($class, %args) = @_;

  # call super class such as XML::SAX::Base
  my $self = $class->SUPER::new;

  # save weights of elements which is a hash for pairs <elementName, weight>
  # weight is times duplication of corresponding element
  # It is provided by caller(one of parameters) at construction, and
  # we must save it in order to use doing duplication at end_element
  $self->{weightHash} = $args{weights};

  # It is storage to store the data produced by Text, CDataSection and etc.
  $self->{content} = '';

  # This array is used to store the data for every element from root to the current visiting element.
  # Thus, data of 0~($levelPointer-1)th in the array is only valid.
  # The array which store the starting location(index) of the content for an element, 
  # From it, we can know all the data produced by an element at the end_element