| 10 |
|
# Interface |
| 11 |
|
# --------- |
| 12 |
|
# new(data,@key) : A new DataItem object with the data matched to a keylist |
| 13 |
< |
# keys() : return a list of the keys for the data object |
| 13 |
> |
# (See also restore) |
| 14 |
> |
# keys() : return a list of the fundamental keys for the data object |
| 15 |
|
# data() : return the data for the object |
| 16 |
|
# match(@keys) : return 1 if @keys matches those of the data item, else 0 |
| 17 |
+ |
# alias(@keys) : provide an alternative set of keys for matching |
| 18 |
+ |
# unalias(@keys) : remove any aliases - original keys cannot be removed |
| 19 |
+ |
# returns 1 if successful, 0 otherwise |
| 20 |
+ |
# store(fh) : store to the given stream |
| 21 |
+ |
# restore(fh) : Returns a new dataitem, initialised to the data found in |
| 22 |
+ |
# fh |
| 23 |
|
|
| 24 |
|
package Utilities::DataItem; |
| 25 |
|
require 5.001; |
| 32 |
|
$self={}; |
| 33 |
|
bless $self, $class; |
| 34 |
|
$self->{data}=$data; |
| 35 |
< |
@{$self->{keys}}=@keys; |
| 35 |
> |
push @{$self->{keys}[0]},@keys; # fundamental keys |
| 36 |
|
return $self; |
| 37 |
|
} |
| 38 |
|
|
| 39 |
|
sub keys { |
| 40 |
|
my $self=shift; |
| 41 |
< |
return @{$self->{keys}}; |
| 41 |
> |
return @{$self->{keys}[0]}; |
| 42 |
|
} |
| 43 |
|
|
| 44 |
|
sub data { |
| 50 |
|
my $self=shift; |
| 51 |
|
my @keys=@_; |
| 52 |
|
|
| 53 |
< |
my $nm=0; |
| 53 |
> |
my $nm; |
| 54 |
|
|
| 55 |
< |
for ( $i=0; (($i <= $#keys) && ($i <=$#{$self->{keys}})); $i++ ) { |
| 56 |
< |
if ( $self->{keys}[$i] eq $keys[$i] ) { |
| 55 |
> |
# search over all key aliases |
| 56 |
> |
foreach $keyset ( @{$self->{keys}} ) { |
| 57 |
> |
$nm=0; |
| 58 |
> |
for ( $i=0; (($i <= $#keys) && ($i <=$#{$keyset} )); $i++ ) { |
| 59 |
> |
if ( $$keyset[$i] eq $keys[$i] ) { |
| 60 |
|
$nm++; |
| 61 |
< |
} |
| 61 |
> |
} |
| 62 |
> |
} |
| 63 |
> |
return 1 , if ( $nm > $#keys ); # Succesful match |
| 64 |
|
} |
| 53 |
– |
return 1 , if ( $nm > $#keys ); # Succesful match |
| 65 |
|
return 0; |
| 66 |
|
} |
| 67 |
+ |
|
| 68 |
+ |
sub alias { |
| 69 |
+ |
my $self=shift; |
| 70 |
+ |
my @keys=@_; |
| 71 |
+ |
|
| 72 |
+ |
if ( $#keys<0 ) { |
| 73 |
+ |
die "Unable to set an alias with no keys\n"; |
| 74 |
+ |
} |
| 75 |
+ |
push @{$self->{keys}},[@keys]; |
| 76 |
+ |
} |
| 77 |
+ |
|
| 78 |
+ |
sub unalias { |
| 79 |
+ |
my $self=shift; |
| 80 |
+ |
my @keys=@_; |
| 81 |
+ |
|
| 82 |
+ |
my $rv=0; |
| 83 |
+ |
for ( my $i=1; $i<=$#{$self->{keys}}; $i++ ) { |
| 84 |
+ |
if ( "@{$self->{keys}[$i]}" eq "@keys" ) { |
| 85 |
+ |
undef $self->{keys}[$i]; |
| 86 |
+ |
splice( @{$self->{keys}}, $i, 1); |
| 87 |
+ |
$rv=1; |
| 88 |
+ |
} |
| 89 |
+ |
} |
| 90 |
+ |
return $rv; |
| 91 |
+ |
} |
| 92 |
+ |
|
| 93 |
+ |
sub store { |
| 94 |
+ |
my $self=shift; |
| 95 |
+ |
my $fh=shift; |
| 96 |
+ |
|
| 97 |
+ |
# print the keys first, aliases, then the data |
| 98 |
+ |
foreach $keyset ( @{$self->{keys}} ) { |
| 99 |
+ |
foreach $key ( @{$keyset} ) { |
| 100 |
+ |
print $fh "#".$key."\n"; |
| 101 |
+ |
} |
| 102 |
+ |
print $fh "#\n"; # alias marker |
| 103 |
+ |
} |
| 104 |
+ |
print $fh ">".$self->data()."\n"; |
| 105 |
+ |
} |
| 106 |
+ |
|
| 107 |
+ |
sub restore { |
| 108 |
+ |
my $class=shift; |
| 109 |
+ |
my $fh=shift; |
| 110 |
+ |
|
| 111 |
+ |
$self={}; |
| 112 |
+ |
bless $self, $class; |
| 113 |
+ |
|
| 114 |
+ |
my @arr=(); |
| 115 |
+ |
while ( <$fh> ) { |
| 116 |
+ |
chomp; |
| 117 |
+ |
if ( $_ eq "#") { # set aliases |
| 118 |
+ |
$self->alias(@arr); |
| 119 |
+ |
@arr=(); |
| 120 |
+ |
} |
| 121 |
+ |
elsif ( $_=~/^#(.*)/ ) { |
| 122 |
+ |
push @arr, $1; |
| 123 |
+ |
} |
| 124 |
+ |
elsif ( $_=~/^>(.*)/ ) { # load in data |
| 125 |
+ |
$data=$1; |
| 126 |
+ |
$self->{data}=$data; |
| 127 |
+ |
last; |
| 128 |
+ |
} |
| 129 |
+ |
else { |
| 130 |
+ |
print "Data corruption detected\n"; |
| 131 |
+ |
last; |
| 132 |
+ |
} |
| 133 |
+ |
} |
| 134 |
+ |
return $self; |
| 135 |
+ |
} |
