Linux cli command XML_Handler_Subspm

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NAME 🖥️ XML_Handler_Subspm 🖥️

a PerlSAX handler base class for calling user-defined subs

SYNOPSIS

use XML::Handler::Subs; package MyHandlers; use vars qw{ @ISA }; sub s_NAME { my ($self, $element) = @_ }; sub e_NAME { my ($self, $element) = @_ }; $self->{Names}; # an array of names $self->{Nodes}; # an array of $element nodes $handler = MyHandlers->new(); $self->in_element($name); $self->within_element($name);

DESCRIPTION

XML::Handler::Subs is a base class for PerlSAX handlers. XML::Handler::Subs is subclassed to implement complete behavior and to add element-specific handling.

Each time an element starts, a method by that name prefixed with `s_’ is called with the element to be processed. Each time an element ends, a method with that name prefixed with `e_’ is called. Any special characters in the element name are replaced by underscores.

Subclassing XML::Handler::Subs in this way is similar to XML::Parser’s Subs style.

XML::Handler::Subs maintains a stack of element names, `$self-{Names}’, and a stack of element nodes, `$self-{Nodes}>’ that can be used by subclasses. The current element is pushed on the stacks before calling an element-name start method and popped off the stacks after calling the element-name end method. The `in_element()’ and `within_element()’ calls use these stacks.

If the subclass implements `start_document()’, `end_document()’, `start_element()’, and `end_element()’, be sure to use `SUPER::’ to call the the superclass methods also. See perlobj (1) for details on SUPER::. `SUPER::start_element()’ and `SUPER::end_element()’ return 1 if an element-name method is called, they return 0 if no method was called.

XML::Handler::Subs does not implement any other PerlSAX handlers.

XML::Handler::Subs supports the following methods:

new( OPTIONS )
A basic `new()’ method. `new()’ takes a list of key, value pairs or a hash and creates and returns a hash with those options; the hash is blessed into the subclass.

in_element($name)
Returns true if `$name’ is equal to the name of the innermost currently opened element.

within_element($name)
Returns the number of times the `$name’ appears in Names.

AUTHOR

Ken MacLeod, [email protected]

SEE ALSO

perl (1), PerlSAX.pod (3)

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