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# -*- Mode: Cperl -*- |
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# Query.pm -- |
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# ITIID : $ITI$ $Header $__Header$ |
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# Author : Ulrich Pfeifer |
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# Created On : Fri Sep 13 13:05:52 1996 |
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# Last Modified By: Ulrich Pfeifer |
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# Last Modified On: Sun Nov 22 18:44:40 1998 |
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# Language : CPerl |
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# Update Count : 55 |
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# Status : Unknown, Use with caution! |
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# |
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# Copyright (c) 1996-1997, Ulrich Pfeifer |
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# |
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|
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package WAIT::Query::Base; |
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|
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sub new { |
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my $type = shift; |
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my $table = shift; |
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my $self = {Table => $table}; |
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|
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bless $self, ref($type) || $type; |
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if (@_) { |
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$self->add(@_); |
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} else { |
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$self; |
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} |
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} |
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|
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sub add { |
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my ($self, $fldorref, %parm) = @_; |
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my @fld = (ref $fldorref)?@$fldorref:$fldorref; |
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my $fld; |
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|
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for $fld (@fld) { |
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if (defined $parm{Plain}) { |
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if (defined $self->{Plain}->{$fld}) { |
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$self->{Plain}->{$fld} .= ' ' . $parm{Plain}; |
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} else { |
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$self->{Plain}->{$fld} = $parm{Plain}; |
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} |
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} |
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if (defined $parm{Raw}) { |
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if (defined $self->{Raw}->{$fld}) { |
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$self->{Raw}->{$fld}->merge($parm{Raw}); |
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} else { |
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$self->{Raw}->{$fld} = $parm{Raw}; |
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} |
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} |
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} |
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$self; |
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} |
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|
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sub merge { |
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my ($self, $other) = @_; |
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my $fld; |
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|
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if (ref($self) ne ref($other)) { |
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return $other->merge($self); |
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} |
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for $fld (keys %{$other->{Plain}}) { |
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$self->add($fld, Plain => $other->{Plain}->{$fld}); |
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} |
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for $fld (keys %{$other->{Raw}}) { |
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$self->add($fld, Raw => $other->{Raw}->{$fld}); |
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} |
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|
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$self; |
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} |
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|
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sub clone { |
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my $self = shift; |
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my %copy; |
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my $fld; |
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|
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for $fld (keys %{$self->{Plain}}) { |
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$copy{Plain}->{$fld} = $self->{Plain}->{$fld}; |
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} |
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for $fld (keys %{$self->{Raw}}) { |
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next unless defined $self->{Raw}->{$fld}; # XXX bug elsewere |
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$copy{Raw}->{$fld} = $self->{Raw}->{$fld}->clone; |
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} |
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|
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$self; |
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} |
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|
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sub execute { |
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my $self = shift; |
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my $tb = $self->{Table}; |
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my %result; |
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my $fld; |
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|
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for $fld (keys %{$self->{Plain}}, keys %{$self->{Raw}}) { |
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%r = $tb->search($fld, |
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$self->{Plain}->{$fld}, |
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$self->{Raw}->{$fld}, |
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); |
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my ($key, $val); |
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while (($key, $val) = each %r) { |
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if (exists $result{$key}) { |
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$result{$key} += $val; |
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} else { |
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$result{$key} = $val; |
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} |
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} |
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} |
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%result; |
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} |
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|
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sub hilight { |
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my $self = shift; |
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$self->{Table}->hilight($_[0], $self->{Plain}, $self->{Raw}) |
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} |
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|
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sub flatten { |
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my $self = shift; |
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#print STDERR "WAIT::Query::Base::flatten($self)\n"; |
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$self->clone() |
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} |
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|
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package WAIT::Query::bin; |
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|
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sub new { |
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my $type = shift; |
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my $self = [@_]; |
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|
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#print STDERR "WAIT::Query::bin::new $type $self\n"; |
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bless $self, ref($type) || $type; |
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} |
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|
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sub flatten { |
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my $self = shift; |
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#print STDERR "WAIT::Query::bin::flatten($self)\n"; |
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$self->[0]->flatten->merge($self->[1]->flatten) |
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} |
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|
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sub hilight { |
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my $self = shift; |
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my $query = $self->flatten(); |
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|
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$query->hilight(@_); |
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} |
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|
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package WAIT::Query::and; |
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|
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@ISA = qw(WAIT::Query::bin); |
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|
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sub execute { |
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my $self = shift; |
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my %ra = $self->[0]->execute(); |
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my %rb = $self->[1]->execute(); |
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|
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#print STDERR "WAIT::Query::and::execute\n"; |
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for (keys %ra) { |
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if (exists $rb{$_}) { |
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$ra{$_} *= $rb{$_}; |
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delete $ra{$_} if $ra{$_} <= 0; |
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} else { |
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delete $ra{$_}; |
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} |
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} |
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%ra; |
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} |
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|
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|
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sub merge { |
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#print STDERR "WAIT::Query::and::merge(@_)\n"; |
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new WAIT::Query::or @_; # XXX |
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} |
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|
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package WAIT::Query::or; |
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|
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@ISA = qw(WAIT::Query::bin); |
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|
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sub execute { |
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my $self = shift; |
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my %ra = $self->[0]->execute(); |
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my %rb = $self->[1]->execute(); |
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|
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for (keys %ra) { |
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if (exists $rb{$_}) { |
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$ra{$_} += $rb{$_} |
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} |
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} |
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for (keys %rb) { |
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unless (exists $ra{$_}) { |
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$ra{$_} = $rb{$_} |
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} |
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} |
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%ra; |
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} |
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|
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|
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sub merge { |
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my $self = shift; |
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|
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if (ref($_[0]) eq 'WAIT::Query::Base') { |
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$self->[0] = $self->[0]->merge($_[0]); |
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} else { |
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new WAIT::Query::or $self, @_; # XXX |
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} |
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} |
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|
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package WAIT::Query::not; |
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|
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@ISA = qw(WAIT::Query::and WAIT::Query::bin); |
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|
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sub execute { |
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my $self = shift; |
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my %ra = $self->[0]->execute(); |
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my %rb = $self->[1]->execute(); |
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|
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for (keys %ra) { |
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if (exists $rb{$_}) { |
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if (exists $ra{$_}) { |
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$ra{$_} -= $rb{$_}; |
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delete $ra{$_} if $ra{$_} <= 0; |
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} |
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} |
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} |
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|
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%ra; |
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} |
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|
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package WAIT::Query::Raw; |
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use strict; |
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use Carp; |
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|
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sub new { |
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my $type = shift; |
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my $self = shift; |
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|
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$self = {} unless defined $self; |
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bless $self, ref($type) || $type; |
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} |
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|
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sub clone { |
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my $self = shift; |
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my %copy; |
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|
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for (keys %$self) { |
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$copy{$_} = [@{$self->{$_}}]; |
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} |
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$self->new(\%copy); |
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} |
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|
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# Modifies first argument |
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sub merge { |
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my $self = shift; |
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my $other = shift; |
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|
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croak "$other is not at 'WAIT::Query'" unless ref($other) =~ /^WAIT::Query/; |
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for (keys %$other) { |
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if (exists $self->{$_}) { |
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push @{$self->{$_}}, @{$other->{$_}} |
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} else { |
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$self->{$_} = $other->{$_}; |
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} |
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} |
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} |
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|
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1; |
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