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.\"
.IX Title "XML::DOM::ValParser 3pm"
.TH XML::DOM::ValParser 3pm "2021-01-03" "perl v5.32.0" "User Contributed Perl Documentation"
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.SH "NAME"
XML::DOM::ValParser \- an XML::DOM::Parser that validates at parse time
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& use XML::DOM::ValParser;
\&
\& my %expat_options = (KeepCDATA => 1, 
\&                      Handlers => [ Unparsed => \e&my_Unparsed_handler ]);
\& my $parser = new XML::DOM::ValParser (%expat_options);
\&
\& eval {
\&     local $XML::Checker::FAIL = \e&my_fail;
\&     my $doc = $parser\->parsefile ("fail.xml");
\&     ... XML::DOM::Document was created successfully ...
\& };
\& if ($@) {
\&     # 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\*(Aqt 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, @_);
\& }
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Use XML::DOM::ValParser wherever you would use XML::DOM::Parser and
your \s-1XML\s0 will be checked using XML::Checker at parse time.
.PP
See \s-1XML::DOM\s0 for details on XML::DOM::Parser options.
See XML::Checker for details on setting the fail handler (my_fail.)
.PP
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.
.SH "XML::DOM::ValParser"
.IX Header "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.
.PP
Just like XML::Checker::Parser, the checker object can be retrieved with
the \fBgetChecker()\fR method and can be reused later on (provided that the \s-1DOCTYPE\s0
section of the XML::DOM::Document did not change in the mean time.)
.PP
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 \f(CW$XML::Checker::FAIL\fR handler 
(see \*(L"\s-1ERROR_HANDLING\*(R"\s0 in XML::Checker) and 
calling \fIdie\fR or \fIcroak\fR appropriately.
.PP
Just like XML::Checker::Parser, XML::DOM::ValParser supports the 
SkipExternalDTD and SkipInsignifWS options. See XML::Checker::Parser
for details.
.SH "AUTHOR"
.IX Header "AUTHOR"
Enno Derksen is the original author.
.PP
Send bug reports, hints, tips, suggestions to T.J. Mather at
<\fItjmather@tjmather.com\fR>.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\s-1XML::DOM\s0, XML::Checker (\*(L"\s-1SEE_ALSO\*(R"\s0 in XML::Checker)