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XML::Grove::Subst.3pm
Langue: en
Version: 1999-08-25 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
NAME
XML::Grove::Subst - substitute values into a templateSYNOPSIS
use XML::Grove::Subst; # Using subst method on XML::Grove::Document or XML::Grove::Element: $new_grove = $source_grove->subst( ARGS ); $new_grove = $source_grove->subst_hash( ARG ); # Using an XML::Grove::Subst instance: $subster = XML::Grove::Subst->new(); $new_grove = $subster->subst( $source_grove, ARGS ); $new_grove = $subster->subst_hash( $source_grove, ARG );
DESCRIPTION
"XML::Grove::Subst" implements XML templates. "XML::Grove::Subst" traverses through a source grove replacing all elements with names `"SUB:XXX"' or `"SUB:key"' with their corresponding values from ARGS (a list) or ARG (a hash), repsectively.METHODS
- $grove_obj->subst( ARGS ) =item $subster->subst( $grove_obj, ARGS )
- Search for `"SUB:XXX"' elements, where XXX is an array index, and replace the element with the value from ARGS, a list of values. The return value is a new grove with the substitutions applied.
- $grove_obj->subst_hash( ARG ) =item $subster->subst_hash( $grove_obj, ARG )
- Search for `"SUB:key"' elements and replace the element with the value from ARG, a hash of values. The hash key is taken from the `"key"' attribute of the `"SUB:key"' element, for example, `"<SUB:key key='foo'>"'. The return value is a new grove with the substitutions applied.
EXAMPLE
The following template, in a file `"template.xml"', could be used for a simple parts database conversion to HTML:<html> <head> <title><SUB:key key='Name'></title> </head> <body> <h1><SUB:key key='Name'></title> <p>Information for part number <SUB:key key='Number'>:</p> <SUB:key key='Description'> </body> </html>
To use this template you would first parse it and convert it to a grove, and then use `"subst_hash()"' every time you needed a new page:
use XML::Parser::PerlSAX; use XML::Grove; use XML::Grove::Builder; use XML::Grove::Subst; use XML::Grove::PerlSAX; use XML::Handler::XMLWriter; # Load the template $b = XML::Grove::Builder->new(); $p = XML::Parser::PerlSAX->new( Handler = $b ); $source_grove = $p->parse( Source => { SystemId => 'template.xml' } ); # Apply the substitutions $new_grove = $source_grove->subst_hash( { Name => 'Acme DCX-2000 Filter', Number => 'N4728', Description => 'The Best' } ); # Write the new grove to standard output $w = XML::Handler::XMLWriter->new(); $wp = XML::Grove::PerlSAX->new( Handler => $w ); $wp->parse( Source => { Grove => $new_grove } );
AUTHOR
Ken MacLeod, ken@bitsko.slc.ut.usSEE ALSO
perl(1), XML::Grove(3)Extensible Markup Language (XML) <http://www.w3c.org/XML>
POD ERRORS
Hey! The above document had some coding errors, which are explained below:- Around line 173:
- You forgot a '=back' before '=head1'
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