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lib/Alvis/Document/Meta.pm  view on Meta::CPAN

	     "doc-rights" => "dc:rights",
	     "page-topic" => "dc:subject",
	     "keyword" => "dc:subject",
	     "document-rights" => "dc:rights",
	     "keywords " => "dc:subject",
	     "resource-type " => "dc:type",
	     "summary" => "dc:description",
	     "creation-date" => "dc:date",
	     "type " => "dc:type",
	     "document-classification" => "dc:subject",
	     "country" => "dc:coverage",
	     "progid" => "dc:format",
	     "content-language " => "dc:language",
	     "title " => "dc:title",
	     "created" => "dc:date",
	     "doc-type" => "dc:type",
	     "mimetype" => "dc:type",
	     "server"=>"server"
	     );

my %DCMap=(
	   "dc:coverage" => "dc:coverage",
	   "dc:date.x-metadatalastmodified" => "dc:date",
	   "dc:language" => "dc:language",
	   "dc:title" => "dc:title",
	   "dc:date.created" => "dc:date",
	   "dc:format" => "dc:format",
	   "dc:description" => "dc:description",
	   "dc:source" => "dc:source",
	   "dc:date.modified" => "dc:date",
	   "dc:creator" => "dc:creator",
	   "dc:coverage.placename" => "dc:coverage",
	   "dc:rights" => "dc:rights",
	   "dc:subject" => "dc:subject",
	   "dc:contributor" => "dc:contributor",
	   "dc:type" => "dc:type",
	   "dc:identifier" => "dc:identifier",
	   "dc:publisher" => "dc:publisher",
	   "dc:date" => "dc:date"
	   );

#########################################################################

my ($ERR_OK,
    $ERR_UNK_FIELD_NAME,
    $ERR_PARSE
    )=(0..2);

my %ErrMsgs=($ERR_OK=>"",
	     $ERR_UNK_FIELD_NAME=>"Unrecognized field name.",
	     $ERR_PARSE=>"Parsing the meta text failed."
	     );

sub new
{
    my $proto=shift;
 
    my $class=ref($proto)||$proto;
    my $parent=ref($proto)&&$proto;
    my $self={};
    bless($self,$class);

    $self->_set_err_state($ERR_OK);

    $self->_init(@_);

    if (defined($self->{text}))
    {
	if (!$self->parse($self->{text}))
	{
	    $self->_set_err_state($ERR_PARSE,
				  "Text:\"$self->{text}\".");
	    return undef;
	}
    }

    return $self;
}

sub _init
{
    my $self=shift;

    if (defined(@_))
    {
        my %args=@_;
        @$self{ keys %args }=values(%args);
    }

}

sub _set_err_state
{
    my $self=shift;
    my $errcode=shift;
    my $errmsg=shift;

    if (!defined($errcode))
    {
	confess("set_err_state() called with an undefined argument.");
    }

    if (exists($ErrMsgs{$errcode}))
    {
	if ($errcode==$ERR_OK)
	{
	    $self->{errstr}="";
	}
	else
	{
	    $self->{errstr}.=" " . $ErrMsgs{$errcode};
	    if (defined($errmsg))
	    {
		$self->{errstr}.=" " . $errmsg;
	    }
	}
    }
    else
    {
	confess("Internal error: set_err_state() called with an " .
		"unrecognized argument ($errcode).")