NAME¶
Data::Stag::HashDB - build indexes over Stag files or objects
SYNOPSIS¶
# parsing a file into a hash
my $hdb = Data::Stag::HashDB->new;
$hdb->unique_key("ss_details/social_security_no");
$hdb->record_type("person");
my $obj = {};
$hdb->index_hash($obj);
Data::Stag->parse(-file=>$fn, -handler=>$hdb);
my $person = $obj->{'999-9999-9999'};
print $person->xml;
# indexing an existing stag tree into a hash
my $personset = Data::Stag->parse($fn);
my $hdb = Data::Stag::HashDB->new;
$hdb->unique_key("ss_details/social_security_no");
$hdb->record_type("person");
my $obj = {};
$hdb->index_hash($obj);
$personset->sax($hdb);
my $person = $obj->{'999-9999-9999'};
print $person->xml;
DESCRIPTION¶
Used for building indexes over Stag files or objects
You need to provide a
record_type - this is the type of element that will
be indexed
You need to provide a
unique_key - this is a single value used to index
the
record_types
For example, if we have data in the stag structure below, and if ss_no is unique
(we assume it is) then we can index all the people in the database using the
code above
publicinfo:
persondata:
person:
ss_details:
social_security_no:
name:
address:
There is a subclass of this method callsed Data::Stag::StagDB, which makes the
hash persistent
PUBLIC METHODS -¶
record_type¶
Usage -
Returns -
Args -
unique_key¶
Usage -
Returns -
Args -
index_hash¶
Usage -
Returns -
Args -