| 13 |
|
# deletedata(@keys) : detete all data items that match the given keys |
| 14 |
|
# match(@keys) : return the full DataItem object refs that match keys |
| 15 |
|
# items() : return the number of seperate items in the store |
| 16 |
+ |
# store(filename) : dump to file |
| 17 |
+ |
# restore(filename) : restore from file |
| 18 |
+ |
# alias(\@refofkeys,\@aliaskeys) : attatch another set of keys to items that |
| 19 |
+ |
# match the refopfkeys |
| 20 |
+ |
# note that these are references to the arrays |
| 21 |
+ |
# unalias(@aliaskeys) :remove an alias |
| 22 |
|
|
| 23 |
|
package Utilities::HashDB; |
| 24 |
|
use Utilities::DataItem; |
| 25 |
+ |
use FileHandle; |
| 26 |
|
require 5.001; |
| 27 |
|
|
| 28 |
|
sub new { |
| 41 |
|
push @{$self->{dataitems}}, Utilities::DataItem->new($data, @keys); |
| 42 |
|
} |
| 43 |
|
|
| 44 |
+ |
sub alias { |
| 45 |
+ |
my $self=shift; |
| 46 |
+ |
my $keyref=shift; |
| 47 |
+ |
my $aliaskeys=shift; |
| 48 |
+ |
|
| 49 |
+ |
my @objs=$self->match(@{$keyref}); |
| 50 |
+ |
foreach $obj ( @objs ) { |
| 51 |
+ |
$obj->alias(@{$aliaskeys}); |
| 52 |
+ |
} |
| 53 |
+ |
} |
| 54 |
+ |
|
| 55 |
+ |
sub unalias { |
| 56 |
+ |
my $self=shift; |
| 57 |
+ |
my @keys=@_; |
| 58 |
+ |
|
| 59 |
+ |
my @objs=$self->match(@keys); |
| 60 |
+ |
foreach $obj ( @objs ) { |
| 61 |
+ |
$obj->unalias(@_); |
| 62 |
+ |
} |
| 63 |
+ |
} |
| 64 |
+ |
|
| 65 |
|
sub items { |
| 66 |
|
my $self=shift; |
| 67 |
|
return $#{$self->{dataitems}}; |
| 103 |
|
return @data; |
| 104 |
|
} |
| 105 |
|
|
| 106 |
+ |
sub store { |
| 107 |
+ |
my $self=shift; |
| 108 |
+ |
my $filename=shift; |
| 109 |
+ |
|
| 110 |
+ |
my $fh=FileHandle->new(); |
| 111 |
+ |
$fh->autoflush(1); |
| 112 |
+ |
open ($fh, ">$filename") or die "Unable to open file $filename\n $!\n"; |
| 113 |
+ |
foreach $object ( @{$self->{dataitems}} ) { |
| 114 |
+ |
print $fh "\n"; |
| 115 |
+ |
$object->store($fh); |
| 116 |
+ |
} |
| 117 |
+ |
close $fh; |
| 118 |
+ |
} |
| 119 |
+ |
|
| 120 |
+ |
sub restore { |
| 121 |
+ |
my $self=shift; |
| 122 |
+ |
my $filename=shift; |
| 123 |
+ |
my @arr=(); |
| 124 |
+ |
my $data; |
| 125 |
+ |
|
| 126 |
+ |
my $fh=FileHandle->new(); |
| 127 |
+ |
open ($fh, "<$filename") or die "Unable to open file $filename\n $!\n"; |
| 128 |
+ |
while ( <$fh> ) { |
| 129 |
+ |
push @{$self->{dataitems}}, Utilities::DataItem->restore($fh); |
| 130 |
+ |
} |
| 131 |
+ |
close $fh; |
| 132 |
+ |
} |
| 133 |
+ |
|
| 134 |
|
# ------------------- Support Routines ------------ |
| 135 |
|
# returns list of array indices of items matching the keys |
| 136 |
|
|
