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#============================================================= -*-perl-*- |
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# XML::Schema::Facet |
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# DESCRIPTION |
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# Module implementing a base object class for representing XML |
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# Schema facets. A facet is a mechanism for specifying optional |
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# properties which constrain the value space of a datatype. |
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# |
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# AUTHOR |
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# Andy Wardley |
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# COPYRIGHT |
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# Copyright (C) 2001 Canon Research Centre Europe Ltd. |
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# All Rights Reserved. |
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# |
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# This module is free software; you can redistribute it and/or |
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# modify it under the same terms as Perl itself. |
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# |
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# REVISION |
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# $Id: Facet.pm,v 1.1.1.1 2001/08/29 14:30:17 abw Exp $ |
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# |
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#======================================================================== |
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package XML::Schema::Facet; |
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use strict; |
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use base qw( XML::Schema::Base ); |
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use vars qw( $VERSION $DEBUG $ERROR @MANDATORY @OPTIONAL ); |
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$VERSION = sprintf("%d.%02d", q$Revision: 1.1.1.1 $ =~ /(\d+)\.(\d+)/); |
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$DEBUG = 0 unless defined $DEBUG; |
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$ERROR = ''; |
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@MANDATORY = qw( value ); |
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@OPTIONAL = qw( annotation name errmsg ); |
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#------------------------------------------------------------------------ |
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# new() |
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# |
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# Specialised constructor which extracts the facet name from the last |
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# element of the package name. e.g. for XML:Schema::Facet::minLength |
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# the facet name is 'minLength'. The $NAME package variable may be |
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# defined to override this behaviour and specify an alternate facet |
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# name. |
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#------------------------------------------------------------------------ |
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sub new { |
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my $class = shift; |
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# make "new($n)" equivalent to "new(value => $n)" |
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unshift(@_, 'value') if @_ == 1 && ref $_[0] ne 'HASH'; |
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$class->SUPER::new(@_); |
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} |
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sub init { |
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my ($self, $config) = @_; |
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my ($mand, $option) = @{ $self->_baseargs( qw( @MANDATORY %OPTIONAL ) ) }; |
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$self->_mandatory($mand, $config) |
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|| return; |
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$self->_optional($option, $config) |
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|| return; |
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$self->{ name } ||= do { |
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my $class = ref $self; |
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$class =~ /.*::(\w+)$/; |
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$1; |
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}; |
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return $self; |
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} |
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sub install { |
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my ($self, $facets, $table) = @_; |
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# $self->DEBUG("installing $self into type as $self->{ name }\n"); |
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push(@$facets, $self); |
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$table->{ $self->{ name } } = $self; |
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return 1; |
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} |
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sub name { |
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my $self = shift; |
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return $self->{ name }; |
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} |
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sub value { |
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my $self = shift; |
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return $self->{ value }; |
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} |
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sub annotation { |
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my $self = shift; |
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return $self->{ annotation }; |
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} |
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sub valid { |
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my ($self, $instance, $type) = @_; |
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return 1; |
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} |
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sub invalid { |
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my ($self, $msg) = @_; |
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$self->error($self->{ errmsg } || |
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"$msg (required $self->{ name }: $self->{ value })"); |
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} |
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sub accept { |
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1
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0
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my ($self, $visitor) = @_; |
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1
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$visitor->visit_facet($self); |
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} |
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1; |
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__END__ |