Initial Commit

database/perl/vendor/lib/XML/SAX/DocumentLocator.pm

@@ -0,0 +1,134 @@
+# $Id$
+
+package XML::SAX::DocumentLocator;
+use strict;
+
+sub new {
+    my $class = shift;
+    my %object;
+    tie %object, $class, @_;
+
+    return bless \%object, $class;
+}
+
+sub TIEHASH {
+    my $class = shift;
+    my ($pubmeth, $sysmeth, $linemeth, $colmeth, $encmeth, $xmlvmeth) = @_;
+    return bless { 
+        pubmeth => $pubmeth,
+        sysmeth => $sysmeth,
+        linemeth => $linemeth,
+        colmeth => $colmeth,
+        encmeth => $encmeth,
+        xmlvmeth => $xmlvmeth,
+    }, $class;
+}
+
+sub FETCH {
+    my ($self, $key) = @_;
+    my $method;
+    if ($key eq 'PublicId') {
+        $method = $self->{pubmeth};
+    }
+    elsif ($key eq 'SystemId') {
+        $method = $self->{sysmeth};
+    }
+    elsif ($key eq 'LineNumber') {
+        $method = $self->{linemeth};
+    }
+    elsif ($key eq 'ColumnNumber') {
+        $method = $self->{colmeth};
+    }
+    elsif ($key eq 'Encoding') {
+        $method = $self->{encmeth};
+    }
+    elsif ($key eq 'XMLVersion') {
+        $method = $self->{xmlvmeth};
+    }
+    if ($method) {
+        my $value = $method->($key);
+        return $value;
+    }
+    return undef;
+}
+
+sub EXISTS {
+    my ($self, $key) = @_;
+    if ($key =~ /^(PublicId|SystemId|LineNumber|ColumnNumber|Encoding|XMLVersion)$/) {
+        return 1;
+    }
+    return 0;
+}
+
+sub STORE {
+    my ($self, $key, $value) = @_;
+}
+
+sub DELETE {
+    my ($self, $key) = @_;
+}
+
+sub CLEAR {
+    my ($self) = @_;
+}
+
+sub FIRSTKEY {
+    my ($self) = @_;
+    # assignment resets.
+    $self->{keys} = {
+        PublicId => 1,
+        SystemId => 1,
+        LineNumber => 1,
+        ColumnNumber => 1,
+        Encoding => 1,
+        XMLVersion => 1,
+    };
+    return each %{$self->{keys}};
+}
+
+sub NEXTKEY {
+    my ($self, $lastkey) = @_;
+    return each %{$self->{keys}};
+}
+
+1;
+__END__
+
+=head1 NAME
+
+XML::SAX::DocumentLocator - Helper class for document locators
+
+=head1 SYNOPSIS
+
+  my $locator = XML::SAX::DocumentLocator->new(
+      sub { $object->get_public_id },
+      sub { $object->get_system_id },
+      sub { $reader->current_line },
+      sub { $reader->current_column },
+      sub { $reader->get_encoding },
+      sub { $reader->get_xml_version },
+  );
+
+=head1 DESCRIPTION
+
+This module gives you a tied hash reference that calls the
+specified closures when asked for PublicId, SystemId,
+LineNumber and ColumnNumber.
+
+It is useful for writing SAX Parsers so that you don't have
+to constantly update the line numbers in a hash reference on
+the object you pass to set_document_locator(). See the source
+code for XML::SAX::PurePerl for a usage example.
+
+=head1 API
+
+There is only 1 method: C<new>. Simply pass it a list of
+closures that when called will return the PublicId, the
+SystemId, the LineNumber, the ColumnNumber, the Encoding 
+and the XMLVersion respectively.
+
+The closures are passed a single parameter, the key being
+requested. But you're free to ignore that.
+
+=cut
+