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sashby |
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#____________________________________________________________________
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# File: SimpleXMLDoc.pm
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#____________________________________________________________________
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#
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# Author: Shaun Ashby <Shaun.Ashby@cern.ch>
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# Update: 2005-04-22 17:09:26+0200
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# Revision: $Id$
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#
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# Copyright: 2005 (C) Shaun Ashby
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#
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#--------------------------------------------------------------------
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package ActiveDoc::SimpleXMLDoc;
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require 5.004;
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use Exporter;
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use XML::Parser::Expat;
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@ISA=qw(Exporter);
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@EXPORT_OK=qw( );
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sub new()
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###############################################################
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# new #
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###############################################################
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# modified : Fri Apr 22 17:10:10 2005 / SFA #
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# params : #
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# : #
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# function : #
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# : #
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###############################################################
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{
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my $proto=shift;
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my $class=ref($proto) || $proto;
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my $self={};
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my ($start, $end, $char, $context)=@_;
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bless $self,$class;
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$self->{CONTEXT}=$context;
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$self->{DEFAULT_HANDLERS}=[ $start, $end, $char ];
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$self->{FUNCTIONDB}={};
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$self->{ATTRIBUTEDB}={};
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$self->{nested} = [];
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$self->_initxmlparser();
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return $self;
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}
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sub _initxmlparser()
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{
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my $self=shift;
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$self->{xmlparser} = new XML::Parser::Expat;
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}
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sub setHandlers()
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{
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my $self=shift;
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my ($start, $end, $char)=@_;
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# Add the recognised XML tag handlers:
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$self->{xmlparser}->setHandlers('Start' => $self->{DEFAULT_HANDLERS}->[0],
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'End' => $self->{DEFAULT_HANDLERS}->[1],
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'Char' => $self->{DEFAULT_HANDLERS}->[2]);
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}
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sub registerTag()
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{
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my $self=shift;
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my ($context,$tagname,$tagfunction,$attributes,$nested)=@_;
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$self->addattributestocontext($context,$tagname,$attributes);
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$self->addtagtocontext($context,$tagname,$tagfunction);
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if ($nested)
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{
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# Add the name of the tag which is nested:
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$self->nested($tagname);
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}
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}
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sub addtagtocontext()
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{
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my $self=shift;
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my ($context,$tagname,$tagfunction)=@_;
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$self->{FUNCTIONDB}->{$context}->{$tagname} = $tagfunction;
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}
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sub addattributestocontext()
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{
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my $self=shift;
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my ($context,$tagname,$attributes)=@_;
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return if ($attributes == 0);
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$self->{ATTRIBUTEDB}->{$context}->{$tagname} = $attributes;
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}
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sub parsefile()
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{
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my $self=shift;
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my ($filename)=@_;
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$self->{xmlparser}->parsefile($filename);
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# Clean up:
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delete $self->{xmlparser};
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delete $self->{FUNCTIONDB};
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delete $self->{DEFAULT_HANDLERS};
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}
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sub gettagfunction()
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{
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my $self=shift;
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my ($tagname)=@_;
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# Return the function to be executed for the current tag name
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# in the current context:
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if (exists($self->{FUNCTIONDB}->{$self->{CONTEXT}}->{$tagname}))
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{
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return $self->{FUNCTIONDB}->{$self->{CONTEXT}}->{$tagname};
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}
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else
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{
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die "SCRAM Error: No function registered for tag name \"".$tagname."\" ","\n";
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}
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}
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sub checkattributes()
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{
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my $self=shift;
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my ($tagname,$attributes)=@_;
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# If there's an entry in attributes DB for this element, check
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# that each tag exists in %attributes:
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if (exists($self->{ATTRIBUTEDB}->{$self->{CONTEXT}}->{$tagname}))
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{
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foreach my $param (@{$self->{ATTRIBUTEDB}->{$self->{CONTEXT}}->{$tagname}})
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{
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if ( ! exists($$attributes{$param}))
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{
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die "SCRAM Error: Incomplete Tag <$tagname> : $param required.","\n";
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}
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}
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}
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}
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sub nested()
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{
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my $self=shift;
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@_ ? push(@{$self->{nested}},@_)
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: $self->{nested};
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}
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1;
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