use JSON for serialization rather than rolling own

[scpubgit/stemmatology.git] / lib / Text / Tradition / Collation / Reading.pm

diff --git a/lib/Text/Tradition/Collation/Reading.pm b/lib/Text/Tradition/Collation/Reading.pm
index 29a8aa1..5a60823 100644 (file)
--- a/lib/Text/Tradition/Collation/Reading.pm
+++ b/lib/Text/Tradition/Collation/Reading.pm
@@ -1,7 +1,9 @@
 package Text::Tradition::Collation::Reading;
 
 use Moose;
+use JSON qw/ from_json /;
 use Module::Load;
+use Text::Tradition::Error;
 use YAML::XS;
 use overload '""' => \&_stringify, 'fallback' => 1;
 
@@ -195,6 +197,14 @@ around BUILDARGS => sub {
        $class->$orig( $args );
 };
 
+# Look for a lexeme-string argument in the build args.
+sub BUILD {
+       my( $self, $args ) = @_;
+       if( exists $args->{'lexemes'} ) {
+               $self->_deserialize_lexemes( $args->{'lexemes'} );
+       }
+}
+
 =head2 is_meta
 
 A meta attribute (ha ha), which should be true if any of our 'special'
@@ -319,23 +329,34 @@ sub lemmatize {
 
 }
 
-# For graph serialization. Return a string representation of the associated
+# For graph serialization. Return a JSON representation of the associated
 # reading lexemes.
 sub _serialize_lexemes {
        my $self = shift;
-       my @lexstrs;
-       foreach my $l ( $self->lexemes ) {
-               my @mf;
-               foreach my $wf ( $l->matching_forms ) {
-                       push( @mf, $wf->to_string );
-               }
-               my $form = $l->form ? $l->form->to_string : '';
-               push( @lexstrs, join( '|L|', $l->language, $l->string, $form, 
-                       join( '|M|', @mf ) ) );
+       my $json = JSON->new->allow_blessed(1)->convert_blessed(1);
+       return $json->encode( [ $self->lexemes ] );
+}
+
+# Given a JSON representation of the lexemes, instantiate them and add
+# them to the reading.
+sub _deserialize_lexemes {
+       my( $self, $json ) = @_;
+       my $data = from_json( $json );
+       return unless @$data;
+       
+       # Need to have the lexeme module in order to have lexemes.
+       eval { use Text::Tradition::Collation::Reading::Lexeme; };
+       throw( $@ ) if $@;
+       
+       # Good to go - add the lexemes.
+       my @lexemes;
+       foreach my $lexhash ( @$data ) {
+               push( @lexemes, Text::Tradition::Collation::Reading::Lexeme->new(
+                       'JSON' => $lexhash ) );
        }
-       return join( '|R|', @lexstrs );
+       $self->clear_lexemes;
+       $self->add_lexeme( @lexemes );
 }
-               
 
 ## Utility methods
 
@@ -344,7 +365,12 @@ sub TO_JSON {
        return $self->text;
 }
 
-## TODO will need a throw() here
+sub throw {
+       Text::Tradition::Error->throw( 
+               'ident' => 'Reading error',
+               'message' => $_[0],
+               );
+}
 
 no Moose;
 __PACKAGE__->meta->make_immutable;