Add JSON parser and producer modules

[dbsrgits/SQL-Translator.git] / lib / SQL / Translator / Producer / JSON.pm

diff --git a/lib/SQL/Translator/Producer/JSON.pm b/lib/SQL/Translator/Producer/JSON.pm
new file mode 100644 (file)
index 0000000..0095316
--- /dev/null
+++ b/lib/SQL/Translator/Producer/JSON.pm
@@ -0,0 +1,192 @@
+package SQL::Translator::Producer::JSON;
+
+=head1 NAME
+
+SQL::Translator::Producer::JSON - A JSON producer for SQL::Translator
+
+=head1 SYNOPSIS
+
+  use SQL::Translator;
+
+  my $translator = SQL::Translator->new(producer => 'JSON');
+
+=head1 DESCRIPTION
+
+This module serializes a schema to a JSON string.
+
+=cut
+
+use strict;
+use warnings;
+our $VERSION = '1.00';
+
+use JSON;
+
+sub produce {
+    my $translator = shift;
+    my $schema     = $translator->schema;
+
+    return to_json({
+        schema => {
+            tables => {
+                map { ($_->name => view_table($_)) }
+                    $schema->get_tables,
+            },
+            views => {
+                map { ($_->name => view_view($_)) }
+                    $schema->get_views,
+            },
+            triggers => {
+                map { ($_->name => view_trigger($_)) }
+                    $schema->get_triggers,
+            },
+            procedures => {
+                map { ($_->name => view_procedure($_)) }
+                    $schema->get_procedures,
+            },
+        },
+        translator => {
+            add_drop_table => $translator->add_drop_table,
+            filename       => $translator->filename,
+            no_comments    => $translator->no_comments,
+            parser_args    => $translator->parser_args,
+            producer_args  => $translator->producer_args,
+            parser_type    => $translator->parser_type,
+            producer_type  => $translator->producer_type,
+            show_warnings  => $translator->show_warnings,
+            trace          => $translator->trace,
+            version        => $translator->version,
+        },
+        keys %{$schema->extra} ? ('extra' => { $schema->extra } ) : (),
+    }, {
+        allow_blessed => 1,
+        allow_unknown => 1,
+        %{$translator->producer_args},
+    });
+}
+
+sub view_table {
+    my $table = shift;
+
+    return {
+        'name'        => $table->name,
+        'order'       => $table->order,
+        'options'     => $table->options  || [],
+        $table->comments ? ('comments'    => $table->comments ) : (),
+        'constraints' => [
+            map { view_constraint($_) } $table->get_constraints
+        ],
+        'indices'     => [
+            map { view_index($_) } $table->get_indices
+        ],
+        'fields'      => {
+            map { ($_->name => view_field($_)) }
+                $table->get_fields
+        },
+        keys %{$table->extra} ? ('extra' => { $table->extra } ) : (),
+    };
+}
+
+sub view_constraint {
+    my $constraint = shift;
+
+    return {
+        'deferrable'       => scalar $constraint->deferrable,
+        'expression'       => scalar $constraint->expression,
+        'fields'           => [ map { ref $_ ? $_->name : $_ } $constraint->field_names ],
+        'match_type'       => scalar $constraint->match_type,
+        'name'             => scalar $constraint->name,
+        'options'          => scalar $constraint->options,
+        'on_delete'        => scalar $constraint->on_delete,
+        'on_update'        => scalar $constraint->on_update,
+        'reference_fields' => [ map { ref $_ ? $_->name : $_ } $constraint->reference_fields ],
+        'reference_table'  => scalar $constraint->reference_table,
+        'type'             => scalar $constraint->type,
+        keys %{$constraint->extra} ? ('extra' => { $constraint->extra } ) : (),
+    };
+}
+
+sub view_field {
+    my $field = shift;
+
+    return {
+        'order'             => scalar $field->order,
+        'name'              => scalar $field->name,
+        'data_type'         => scalar $field->data_type,
+        'size'              => [ $field->size ],
+        'default_value'     => scalar $field->default_value,
+        'is_nullable'       => scalar $field->is_nullable,
+        'is_primary_key'    => scalar $field->is_primary_key,
+        'is_unique'         => scalar $field->is_unique,
+        $field->is_auto_increment ? ('is_auto_increment' => 1) : (),
+        $field->comments ? ('comments' => $field->comments) : (),
+        keys %{$field->extra} ? ('extra' => { $field->extra } ) : (),
+    };
+}
+
+sub view_procedure {
+    my $procedure = shift;
+
+    return {
+        'order'      => scalar $procedure->order,
+        'name'       => scalar $procedure->name,
+        'sql'        => scalar $procedure->sql,
+        'parameters' => scalar $procedure->parameters,
+        'owner'      => scalar $procedure->owner,
+        'comments'   => scalar $procedure->comments,
+        keys %{$procedure->extra} ? ('extra' => { $procedure->extra } ) : (),
+    };
+}
+
+sub view_trigger {
+    my $trigger = shift;
+
+    return {
+        'order'               => scalar $trigger->order,
+        'name'                => scalar $trigger->name,
+        'perform_action_when' => scalar $trigger->perform_action_when,
+        'database_events'     => scalar $trigger->database_events,
+        'fields'              => scalar $trigger->fields,
+        'on_table'            => scalar $trigger->on_table,
+        'action'              => scalar $trigger->action,
+        keys %{$trigger->extra} ? ('extra' => { $trigger->extra } ) : (),
+    };
+}
+
+sub view_view {
+    my $view = shift;
+
+    return {
+        'order'  => scalar $view->order,
+        'name'   => scalar $view->name,
+        'sql'    => scalar $view->sql,
+        'fields' => scalar $view->fields,
+        keys %{$view->extra} ? ('extra' => { $view->extra } ) : (),
+    };
+}
+
+sub view_index {
+    my $index = shift;
+
+    return {
+        'name'      => scalar $index->name,
+        'type'      => scalar $index->type,
+        'fields'    => scalar $index->fields,
+        'options'   => scalar $index->options,
+        keys %{$index->extra} ? ('extra' => { $index->extra } ) : (),
+    };
+}
+
+1;
+
+=head1 SEE ALSO
+
+SQL::Translator, JSON, http://www.json.org/.
+
+=head1 AUTHORS
+
+darren chamberlain E<lt>darren@cpan.orgE<gt>,
+Ken Youens-Clark E<lt>kclark@cpan.orgE<gt>.
+Jon Jensen E<lt>jonj@cpan.orgE<gt>.
+
+=cut