GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  XML::SMART::TUTORIAL (3)

.ds Aq ’

NAME

XML::Smart::Tutorial - Tutorial and examples for XML::Smart.

CONTENTS

SYNOPSIS

This document is a tutorial for XML::Smart and shows some examples of usual things.

Working with contents:

In XML::Smart the key CONTENT is reserved and shouldn’t be used directly, since XML::Smart will deal with the convertion of arguments to node contents, including multiple node contents autimatically.

    What happens when you set a value:



  $xml->{root}{foo} = simple value ;



Here foo will be a normal argument/attribute value, and will generate this XML data:



  <root foo="simple value"/>



But if you insert some tag or lines in the values by default XML::Smart will convert it to a node content:



  $xml->{root}{foo} = "line0\nlien1\nline2\n" ;



And will generate that XML data:



  <root>
  <foo>line0
  lien1
  line2
  </foo>
  </root>



But what you can do if you want to force some type, let’s say, have a node content with a simple value:



  $xml->{root}{foo} = simple value ;
  $xml->{root}{foo}->set_node(1) ;



And will generate that XML data:



  <root>
    <foo>simple value</foo>
  </root>



    Multiple contents:

When you have interpolated content/data you need to work in a different. Let’s say that you load this XML data:



  <root>
  content0
  <tag1 arg="1"/>
  content1
  </root>



If you access directly the root key as string you will get all the content parts grouped. So, this code:



  my $xml = new XML::Smart(q`
  <root>
  content0
  <tag1 arg="1"/>
  content1
  </root>
  `,smart) ;
 
  print "#$xml->{root}#" ;



Will print that:



  #
  content0
 
  content1
  #



<B>To access each part of the content independently you should use an array that receive the method B>content()<B>:B>



  my @content = $xml->{root}->content ;
 
  print "#$content[0]#\n" ;



And this will print that:



  #
  content0
  #



<B>Now to set the multiple content values you should use the method B>content()<B> with 2 arguments:B>



  $xml->{root}->content(0,new content) ;



And now the XML data produced will be:



  <root>new content<tag1 arg="1"/>
  content1
  </root>



If you use the method content() with only one argument it will remove all the multiple contents and will set the new value in the place of the 1st content.

Setting the XML Parser.

By defaul XML::Smart will use XML::Parser or XML::Smart::Parser (in this order of preference) to load a XML data.

To force or define by your self the parser you can use the 2nd argument option when creating a XML::Smart object:



  my $xml = new XML::Smart( some.xml , XML::Parser ) ;
 
  ## and
 
  my $xml = new XML::Smart( some.xml , XML::Smart::Parser ) ;



XML::Smart also has an extra parser, XML::Smart::HTMLParser, that can be used to load HTML as XML, or to load wild XML data:



  my $xml = new XML::Smart( some.xml , XML::Smart::HTMLParser ) ;



Aliases for the parser options:



  SMART|REGEXP   => XML::Smart::Parser
  HTML           => XML::Smart::HTMLParser



So, you can use as:



  my $xml = new XML::Smart( some.xml , smart ) ;
  my $xml = new XML::Smart( some.xml , html ) ;



Customizing the Parser.

You can customize the way that the parser will treat the XML data:

    Forcing nodes/tags and arguments/attributes to lowercase or upercase:



  ## For lower case:

  my $xml = new XML::Smart( some.xml ,
  lowtag => 1 ,
  lowarg => 1 ,
  ) ;
 
  ## For uper case:
 
  my $xml = new XML::Smart( some.xml ,
  upertag => 1 ,
  uperarg => 1 ,
  ) ;



    Loading arguments without values (flags) as a TRUE boolean:

** Note, this option will work only when the XML is parsed by XML::Smart::HTMLParser, since only it accept arguments without values!



  my $xml = new XML::Smart(
  <root><foo arg1="" flag></root> ,
  XML::Smart::HTMLParser ,
  arg_single => 1 ,
  ) ;



Here’s the tree of the example above:



  root => {
              foo => {
                         flag => 1,
                         arg1 => 
                       },
            },



    Customizing the parse events:

XML::Smart can redirect the parsing process to personalized functions:



  my $xml = XML::Smart->new( some.xml ,
  on_start => \&on_start ,
  on_char  => \&on_char ,
  on_end   => \&on_end ,
  ) ;
 
  sub on_start {
    my ( $tag , $pointer , $pointer_back ) = @_ ;
    $pointer->{$tag}{type_user} = 1 if $tag =~ /(?:name|age)/ ;
  }

  sub on_char {
    my ( $tag , $pointer , $pointer_back , $content) = @_ ;
    $$content =~ s/\s+/ /gs ;
  }
 
  sub on_end {
    my ( $tag , $pointer , $pointer_back ) = @_ ;
    $pointer->{$tag}{type_extra} = 1 if $tag =~ /(?:more|tel|address)/ ;
  }



AUTHOR

Graciliano M. P. <gm@virtuasites.com.br>

I will appreciate any type of feedback (include your opinions and/or suggestions). ;-P

Enjoy and thanks for who are enjoying this tool and have sent e-mails! ;-P

ePod

This document was written in ePod (easy-POD), than converted to POD, and from here you know the way.
Search for    or go to Top of page |  Section 3 |  Main Index


perl v5.20.3 XML::SMART::TUTORIAL (3) 2013-02-04

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.