=head1 LICENSE
Copyright [1999-2015] Wellcome Trust Sanger Institute and the EMBL-European Bioinformatics Institute
Copyright [2016-2024] EMBL-European Bioinformatics Institute
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
=cut
=head1 CONTACT
Please email comments or questions to the public Ensembl
Questions may also be sent to the Ensembl help desk at
=cut
=head1 NAME
=head1 SYNOPSIS
=head1 DESCRIPTION
=head1 METHODS
=cut
$Bio::EnsEMBL::IdMapping::InternalIdMapper::BaseMapper::VERSION = '112.0_55'; # TRIAL
$Bio::EnsEMBL::IdMapping::InternalIdMapper::BaseMapper::VERSION = '112.055';
use strict;
no warnings 'uninitialized';
our @ISA = qw(Bio::EnsEMBL::IdMapping::BaseObject);
use Bio::EnsEMBL::Utils::Exception qw(throw warning);
# scores are considered the same if (2.0 * (s1-s2))/(s1 + s2) < this
use constant SIMILAR_SCORE_RATIO => 0.01;
#
# find the highest unambiguous score for all sources and targets in a scoring
# matrix
#
sub basic_mapping {
my $self = shift;
my $matrix = shift;
my $mapping_name = shift;
# argument checks
unless ($matrix
and $matrix->isa('Bio::EnsEMBL::IdMapping::ScoredMappingMatrix') )
{
throw('Need a Bio::EnsEMBL::IdMapping::ScoredMappingMatrix.');
}
throw('Need a name for serialising the mapping.')
unless ($mapping_name);
# Create a new MappingList object. Specify AUTO_LOAD to load
# serialised existing mappings if found
my $dump_path =
path_append( $self->conf->param('basedir'), 'mapping' );
my $mappings =
Bio::EnsEMBL::IdMapping::MappingList->new(
-DUMP_PATH => $dump_path,
-CACHE_FILE => "${mapping_name}.ser",
-AUTO_LOAD => 1, );
# checkpoint test: return a previously stored MappingList
if ( $mappings->loaded ) {
$self->logger->info(
"Read existing mappings from ${mapping_name}.ser.\n");
return $mappings;
}
my $sources_done = {};
my $targets_done = {};
# sort scoring matrix entries by descending score
my @sorted_entries =
sort { $b->score <=> $a->score } @{ $matrix->get_all_Entries };
# debug
#my $idx = substr($mapping_name, -1);
while ( my $entry = shift(@sorted_entries) ) {
#$self->logger->debug("\nxxx$idx ".$entry->to_string." ");
# we already found a mapping for either source or target
next
if ( $sources_done->{ $entry->source }
or $targets_done->{ $entry->target } );
#$self->logger->debug('d');
# there's a better mapping for either source or target
next
if ( $self->higher_score_exists(
$entry, $matrix, $sources_done, $targets_done
) );
#$self->logger->debug('h');
# check for ambiguous mappings; they are dealt with later
my $other_sources = [];
my $other_targets = [];
if ( $self->ambiguous_mapping( $entry, $matrix,
$other_sources, $other_targets ) )
{
#$self->logger->debug('a');
$other_sources =
$self->filter_sources( $other_sources, $sources_done );
$other_targets =
$self->filter_targets( $other_targets, $targets_done );
next if ( scalar(@$other_sources) or scalar(@$other_targets) );
}
#$self->logger->debug('A');
# this is the best mapping, add it
$mappings->add_Entry($entry);
$sources_done->{ $entry->source } = 1;
$targets_done->{ $entry->target } = 1;
} ## end while ( my $entry = shift...)
# create checkpoint
$mappings->write_to_file;
return $mappings;
} ## end sub basic_mapping
sub higher_score_exists {
my ( $self, $entry, $matrix, $sources_done, $targets_done ) = @_;
my $source = $entry->source;
my $target = $entry->target;
my $score = $entry->score;
foreach
my $other_source ( @{ $matrix->get_sources_for_target($target) } )
{
if ( $other_source != $source
and !$sources_done->{$other_source}
and $score < $matrix->get_score( $other_source, $target ) )
{
return 1;
}
}
foreach
my $other_target ( @{ $matrix->get_targets_for_source($source) } )
{
if ( $other_target != $target
and !$targets_done->{$other_target}
and $score < $matrix->get_score( $source, $other_target ) )
{
return 1;
}
}
return 0;
} ## end sub higher_score_exists
#
# find ambiguous mappings (see scores_similar() for definition)
#
sub ambiguous_mapping {
my ( $self, $entry, $matrix, $other_sources, $other_targets ) = @_;
my $source = $entry->source;
my $target = $entry->target;
my $score = $entry->score;
my $retval = 0;
foreach
my $other_source ( @{ $matrix->get_sources_for_target($target) } )
{
my $other_score = $matrix->get_score( $other_source, $target );
if ( $other_source != $source
and ( $self->scores_similar( $score, $other_score )
or $score < $other_score ) )
{
$retval = 1;
push @{$other_sources}, $other_source;
}
}
foreach
my $other_target ( @{ $matrix->get_targets_for_source($source) } )
{
my $other_score = $matrix->get_score( $source, $other_target );
if ( $other_target != $target
and ( $self->scores_similar( $score, $other_score )
or $score < $other_score ) )
{
$retval = 1;
push @{$other_targets}, $other_target;
}
}
return $retval;
} ## end sub ambiguous_mapping
#
# rule for similarity taken from java code...
#
sub scores_similar {
my ( $self, $s1, $s2 ) = @_;
# always give priority to exact matches over very similar ones
return 0 if ( $s1 == 1 and $s2 < 1 );
my $diff = $s1 - $s2;
$diff = -$diff if ( $diff < 0 );
my $pc = 2*$diff/( $s1 + $s2 );
return ( $pc < SIMILAR_SCORE_RATIO );
}
sub filter_sources {
my ( $self, $other_sources, $sources_done ) = @_;
unless ( scalar( @{$other_sources} )
and scalar( keys %{$sources_done} ) )
{
return $other_sources;
}
my @tmp = ();
foreach my $e ( @{$other_sources} ) {
push @tmp, $e unless ( $sources_done->{$e} );
}
return \@tmp;
}
sub filter_targets {
my ( $self, $other_targets, $targets_done ) = @_;
unless ( scalar( @{$other_targets} )
and scalar( keys %{$targets_done} ) )
{
return $other_targets;
}
my @tmp = ();
foreach my $e ( @{$other_targets} ) {
push @tmp, $e unless ( $targets_done->{$e} );
}
return \@tmp;
}
1;