NAME
MKDoc::XML::Token - XML Token Object
SYNOPSIS
my $tokens = MKDoc::XML::Tokenizer->process_data ($some_xml);
foreach my $token (@{$tokens})
{
print "'" . $token->as_string() . "' is text\n" if (defined $token->text());
print "'" . $token->as_string() . "' is a self closing tag\n" if (defined $token->tag_self_close());
print "'" . $token->as_string() . "' is an opening tag\n" if (defined $token->tag_open());
print "'" . $token->as_string() . "' is a closing tag\n" if (defined $token->tag_close());
print "'" . $token->as_string() . "' is a processing instruction\n" if (defined $token->pi());
print "'" . $token->as_string() . "' is a declaration\n" if (defined $token->declaration());
print "'" . $token->as_string() . "' is a comment\n" if (defined $token->comment());
print "'" . $token->as_string() . "' is a tag\n" if (defined $token->tag());
print "'" . $token->as_string() . "' is a pseudo-tag (NOT text and NOT tag)\n" if (defined $token->pseudotag());
print "'" . $token->as_string() . "' is a leaf token (NOT opening tag)\n" if (defined $token->leaf());
}SUMMARY
MKDoc::XML::Token is an object representing an XML token produced by MKDoc::XML::Tokenizer.
It has a set of methods to identify the type of token it is, as well as to help building a parsed tree as in MKDoc::XML::TreeBuilder.
API
my $token = new MKDoc::XML::Token ($string_token);
Constructs a new MKDoc::XML::Token object.
my $string_token = $token->as_string();
Returns the string representation of this token so that:
MKDoc::XML::Token->new ($token)->as_string eq $tokenis a tautology.
my $node = $token->leaf();
If this token is not an opening tag, this method will return its corresponding node structure as returned by $token->text(), $token->tag_self_close(), etc.
Returns undef otherwise.
my $node = $token->pseudotag();
If this token is a comment, declaration or processing instruction, this method will return $token->tag_comment(), $token_declaration() or $token->pi() resp.
Returns undef otherwise.
my $node = $token->tag();
If this token is an opening, closing, or self closing tag, this method will return $token->tag_open(), $token->tag_close() or $token->tag_self_close() resp.
Returns undef otherwise.
my $node = $token->comment();
If this token object represents a declaration, the following structure is returned:
# this is <!-- I like Pie. Pie is good -->
{
_tag => '~comment',
text => ' I like Pie. Pie is good ',
}Returns undef otherwise.
my $node = $token->declaration();
If this token object represents a declaration, the following structure is returned:
# this is <!DOCTYPE foo>
{
_tag => '~declaration',
text => 'DOCTYPE foo',
}Returns undef otherwise.
my $node = $token->pi();
If this token object represents a processing instruction, the following structure is returned:
# this is <?xml version="1.0" charset="UTF-8"?>
{
_tag => '~pi',
text => 'xml version="1.0" charset="UTF-8"',
}Returns undef otherwise.
my $node = $token->tag_open();
If this token object represents an opening tag, the following structure is returned:
# this is <aTag foo="bar" baz="buz">
{
_tag => 'aTag',
_open => 1,
_close => 0,
foo => 'bar',
baz => 'buz',
}Returns undef otherwise.
my $node = $token->tag_close();
If this token object represents a closing tag, the following structure is returned:
# this is </aTag>
{
_tag => 'aTag',
_open => 0,
_close => 1,
}Returns undef otherwise.
my $node = $token->tag_self_close();
If this token object represents a self-closing tag, the following structure is returned:
# this is <aTag foo="bar" baz="buz" />
{
_tag => 'aTag',
_open => 1,
_close => 1,
foo => 'bar',
baz => 'buz',
}Returns undef otherwise.
my $node = $token->text();
If this token object represents a piece of text, then this text is returned. Returns undef otherwise. TRAP! $token->text() returns a false value if this text happens to be '0' or ''. So really you should use:
if (defined $token->text()) {
... do stuff...
}NOTES
MKDoc::XML::Token works with MKDoc::XML::Tokenizer, which can be used when building a full tree is not necessary. If you need to build a tree, look at MKDoc::XML::TreeBuilder.
AUTHOR
Copyright 2003 - MKDoc Holdings Ltd.
Author: Jean-Michel Hiver <jhiver@mkdoc.com>
This module is free software and is distributed under the same license as Perl itself. Use it at your own risk.