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XML::DOM::ValParser(3pm) User Contributed Perl Documentation XML::DOM::ValParser(3pm)NAME
XML::DOM::ValParser - an XML::DOM::Parser that validates at parse time
SYNOPSIS
use XML::DOM::ValParser;
my %expat_options = (KeepCDATA => 1,
Handlers => [ Unparsed => &my_Unparsed_handler ]);
my $parser = new XML::DOM::ValParser (%expat_options);
eval {
local $XML::Checker::FAIL = &my_fail;
my $doc = $parser->parsefile ("fail.xml");
... XML::DOM::Document was created sucessfully ...
};
if ($@) {
# Either XML::Parser (expat) threw an exception or my_fail() died.
... your error handling code here ...
# Note that the XML::DOM::Document is automatically disposed off and
# will be garbage collected
}
# Throws an exception (with die) when an error is encountered, this
# will stop the parsing process.
# Don't die if a warning or info message is encountered, just print a message.
sub my_fail {
my $code = shift;
die XML::Checker::error_string ($code, @_) if $code < 200;
XML::Checker::print_error ($code, @_);
}
DESCRIPTION
Use XML::DOM::ValParser wherever you would use XML::DOM::Parser and your XML will be checked using XML::Checker at parse time.
See XML::DOM for details on XML::DOM::Parser options. See XML::Checker for details on setting the fail handler (my_fail.)
The following handlers are currently supported, just like XML::DOM::Parser: Init, Final, Char, Start, End, Default, Doctype, CdataStart,
CdataEnd, XMLDecl, Entity, Notation, Proc, Default, Comment, Attlist, Element, Unparsed.
XML ::DOM::ValParser
XML::DOM::ValParser extends from XML::Checker::Parser. It creates an XML::Checker object and routes all event handlers through the checker,
before processing the events to create the XML::DOM::Document.
Just like XML::Checker::Parser, the checker object can be retrieved with the getChecker() method and can be reused later on (provided that
the DOCTYPE section of the XML::DOM::Document did not change in the mean time.)
You can control which errors are fatal (and therefore should stop creation of the XML::DOM::Document) by filtering the appropriate error
codes in the global $XML::Checker::FAIL handler (see "ERROR_HANDLING" in XML::Checker) and calling die or croak appropriately.
Just like XML::Checker::Parser, XML::DOM::ValParser supports the SkipExternalDTD and SkipInsignifWS options. See XML::Checker::Parser for
details.
AUTHOR
Enno Derksen is the original author.
Send bug reports, hints, tips, suggestions to T.J. Mather at <tjmather@tjmather.com>.
SEE ALSO
XML::DOM, XML::Checker ("SEE_ALSO" in XML::Checker)
perl v5.10.0 2001-08-26 XML::DOM::ValParser(3pm)