| 11 |
|
# setdata(data, @keys) : set a data item to the given keys |
| 12 |
|
# getdata(@keys) : return all data items that match the given keys |
| 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 { |
| 29 |
|
my $class=shift; |
| 30 |
|
$self={}; |
| 31 |
|
bless $self, $class; |
| 32 |
< |
$self->{datahash}=(); |
| 24 |
< |
$self->{datakey}=(); |
| 32 |
> |
$self->{dataitems}=(); |
| 33 |
|
return $self; |
| 34 |
|
} |
| 35 |
|
|
| 38 |
|
my $data=shift; |
| 39 |
|
my @keys=@_; |
| 40 |
|
|
| 41 |
< |
push @{$self->{datakey}}, [ @keys ]; |
| 34 |
< |
push @{$self->{datahash}}, $data; |
| 41 |
> |
push @{$self->{dataitems}}, Utilities::DataItem->new($data, @keys); |
| 42 |
|
} |
| 43 |
|
|
| 44 |
< |
sub items { |
| 44 |
> |
sub alias { |
| 45 |
|
my $self=shift; |
| 46 |
< |
return $#{$self->{datahash}}; |
| 46 |
> |
my $keyref=shift; |
| 47 |
> |
my $aliaskeys=shift; |
| 48 |
> |
|
| 49 |
> |
my @objs=$self->match(@{$keyref}); |
| 50 |
> |
foreach $obj ( @objs ) { |
| 51 |
> |
print "$obj @_\n"; |
| 52 |
> |
$obj->alias(@{$aliaskeys}); |
| 53 |
> |
} |
| 54 |
|
} |
| 55 |
|
|
| 56 |
+ |
sub unalias { |
| 57 |
+ |
my $self=shift; |
| 58 |
+ |
my @keys=@_; |
| 59 |
|
|
| 60 |
< |
sub getdata { |
| 60 |
> |
my @objs=$self->match(@keys); |
| 61 |
> |
foreach $obj ( @objs ) { |
| 62 |
> |
$obj->unalias(@_); |
| 63 |
> |
} |
| 64 |
> |
} |
| 65 |
> |
|
| 66 |
> |
sub items { |
| 67 |
> |
my $self=shift; |
| 68 |
> |
return $#{$self->{dataitems}}; |
| 69 |
> |
} |
| 70 |
> |
|
| 71 |
> |
sub deletedata { |
| 72 |
|
my $self=shift; |
| 73 |
|
my @keys=@_; |
| 74 |
|
|
| 75 |
+ |
# first get all the keys we want to delete |
| 76 |
+ |
my @match=$self->_match(@keys); |
| 77 |
+ |
foreach $i ( @match ) { |
| 78 |
+ |
splice (@{$self->{dataitems}}, $i, 1 ); |
| 79 |
+ |
} |
| 80 |
+ |
} |
| 81 |
+ |
|
| 82 |
+ |
sub match { |
| 83 |
+ |
my $self=shift; |
| 84 |
+ |
my @keys=@_; |
| 85 |
+ |
|
| 86 |
|
my @data=(); |
| 87 |
|
my @match=$self->_match(@keys); |
| 88 |
< |
foreach $d ( @match ) { |
| 89 |
< |
push @data, $self->{datahash}[$d]; |
| 88 |
> |
foreach $i ( @match ) { |
| 89 |
> |
push @data, $self->{dataitems}[$i]; |
| 90 |
|
} |
| 91 |
|
return @data; |
| 92 |
|
} |
| 93 |
|
|
| 94 |
< |
sub deletedata { |
| 94 |
> |
sub getdata { |
| 95 |
|
my $self=shift; |
| 96 |
|
my @keys=@_; |
| 97 |
< |
|
| 98 |
< |
# first get all the keys we want to delete |
| 97 |
> |
|
| 98 |
> |
my @data=(); |
| 99 |
|
my @match=$self->_match(@keys); |
| 100 |
+ |
my $i; |
| 101 |
|
foreach $i ( @match ) { |
| 102 |
< |
splice ( @{$self->{datahash}}, $i, 1 ); |
| 103 |
< |
splice ( @{$self->{datakey}}, $i, 1 ); |
| 102 |
> |
push @data, ($self->{dataitems}[$i]->data()); |
| 103 |
> |
} |
| 104 |
> |
return @data; |
| 105 |
> |
} |
| 106 |
> |
|
| 107 |
> |
sub store { |
| 108 |
> |
my $self=shift; |
| 109 |
> |
my $filename=shift; |
| 110 |
> |
|
| 111 |
> |
my $fh=FileHandle->new(); |
| 112 |
> |
$fh->autoflush(1); |
| 113 |
> |
open ($fh, ">$filename") or die "Unable to open file $filename\n $!\n"; |
| 114 |
> |
foreach $object ( @{$self->{dataitems}} ) { |
| 115 |
> |
print $fh "\n"; |
| 116 |
> |
$object->store($fh); |
| 117 |
> |
} |
| 118 |
> |
close $fh; |
| 119 |
> |
} |
| 120 |
> |
|
| 121 |
> |
sub restore { |
| 122 |
> |
my $self=shift; |
| 123 |
> |
my $filename=shift; |
| 124 |
> |
my @arr=(); |
| 125 |
> |
my $data; |
| 126 |
> |
|
| 127 |
> |
my $fh=FileHandle->new(); |
| 128 |
> |
open ($fh, "<$filename") or die "Unable to open file $filename\n $!\n"; |
| 129 |
> |
while ( <$fh> ) { |
| 130 |
> |
push @{$self->{dataitems}}, Utilities::DataItem->restore($fh); |
| 131 |
|
} |
| 132 |
+ |
close $fh; |
| 133 |
|
} |
| 134 |
|
|
| 135 |
|
# ------------------- Support Routines ------------ |
| 136 |
|
# returns list of array indices of items matching the keys |
| 137 |
+ |
|
| 138 |
|
sub _match { |
| 139 |
|
my $self=shift; |
| 140 |
|
my @keys=@_; |
| 141 |
|
|
| 142 |
< |
my $i; |
| 143 |
< |
my @matchold; |
| 144 |
< |
my @matchnew; |
| 145 |
< |
# At the start everything matches |
| 146 |
< |
for ( $i=0; $i<=$self->items(); $i++ ) { |
| 147 |
< |
if ( $#{$self->{datakey}[$i]} >= $#keys ) { |
| 79 |
< |
push @matchold, $i; |
| 142 |
> |
my @matches=(); |
| 143 |
> |
my $data; |
| 144 |
> |
for ( $i=0; $i<=$#{$self->{dataitems}}; $i++ ) { |
| 145 |
> |
$data=$self->{dataitems}[$i]; |
| 146 |
> |
if ( $data->match(@keys) ) { |
| 147 |
> |
push @matches, $i; |
| 148 |
|
} |
| 149 |
|
} |
| 150 |
< |
|
| 83 |
< |
# now test against keys |
| 84 |
< |
for ( $i=0; $i <= $#keys; $i++ ) { |
| 85 |
< |
undef @matchnew; |
| 86 |
< |
foreach $dn ( @matchold ){ |
| 87 |
< |
if ( $self->{datakey}[$dn][$i] eq $keys[$i] ) { |
| 88 |
< |
push @matchnew,$dn; |
| 89 |
< |
} |
| 90 |
< |
} |
| 91 |
< |
@matchold=@matchnew; |
| 92 |
< |
} |
| 93 |
< |
return @matchold; # list of array indecies |
| 150 |
> |
return @matches; |
| 151 |
|
} |
| 95 |
– |
|
