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#
# Ensembl module for Registry
#
# Copyright EMBL/EBI
##
# You may distribute this module under the same terms as perl itself

# POD documentation - main docs before the code

=head1 NAME

Bio::EnsEMBL::Registry

=head1 SYNOPSIS

$gene_adaptor = Bio::EnsEMBL::Registry->get_adaptor("Homo Sapiens","core","Gene"))


=head1 DESCRIPTION

All Adaptors are stored/registered using this module. This module should then
be used to get the adaptors needed.

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The registry can be loaded from a configuration file using the method load_all.
If a file is passed to load_all then this is used.
Else if the enviroment variable ENSEMBL_REGISTRY is set then this is used
Else if the file .ensembl_init in your home directory exist it is used.

For the Web server ENSEMBL_REGISTRY should be set in SiteDefs.pm, which will
pass this on to load_all.
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The registry can also be loaded via the method load_registry_from_db which
given a host will load the latest versions of the Ensembl databases from it.

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The four types of registrys are for db adaptors, dba adaptors, dna adaptors
and the standard type.

=head2 db

These are registrys for backwards compatibillity and enable the subroutines
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to add other adaptors to connections. 
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e.g. get_all_db_adaptors, get_db_adaptor, add_db_adaptor, remove_db_adaptor
are the old DBAdaptor subroutines which are now redirected to the Registry.

So if before we had
   my $sfa = $self->adaptor()->db()->get_db_adaptor('blast');

We now want to change this to
   my $sfa =  Bio::EnsEMBL::Registry->get_db($self->adaptor->db,'blast');

OR preferably if the blast adaptor was set up in configure
   my $sfa = Bio::EnsEMBL::Registry->get_adaptor("Human","core","blast");


=head2 DBA

These are the stores for the DBAdaptors

The Registry will create all the DBConnections needed now if you set up the
configuration correctly. So instead of the old commands like

my $db = Bio::EnsEMBL::DBSQL::DBAdaptor->new(....)
my $exon_adaptor = $db->get_ExonAdaptor;

we should now have just

my  $exon_adaptor = Bio::EnsEMBL::Registry->get_adaptor("Human","core","Exon");


=head2 DNA

This is an internal Registry and allows the configuration of a dnadb. 
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An example here is to set the est database to get its dna data from the core database.
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## set the est db to use the core for getting dna data.
#Bio::EnsEMBL::Utils::ConfigRegistry->
#                         dnadb_add("Homo Sapiens","core","Homo Sapiens","est");


=head2 adaptors

This is the registry for all the general types of adaptors like GeneAdaptor, ExonAdaptor, 
Slice Adaptor etc.

These are accessed by the get_adaptor subroutine i.e.

my  $exon_adaptor = Bio::EnsEMBL::Registry->get_adaptor("Human","core","Exon");

=head1 CONTACT

Post questions to the Ensembl developer list: <ensembl-dev@ebi.ac.uk>


=head1 METHODS

=cut


package Bio::EnsEMBL::Registry;

use strict;

use Bio::EnsEMBL::DBSQL::MergedAdaptor;
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use Bio::EnsEMBL::DBSQL::DBAdaptor;
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use Bio::EnsEMBL::Utils::Exception qw( deprecate throw warning );
use Bio::EnsEMBL::Utils::Argument qw(rearrange);
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use DBI;
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use vars qw(%registry_register);

$registry_register{'_WARN'} = 0;



=head2 load_all
 Will load the registry with the configuration file which is obtained from
 the first in the following and in that order.

  1) if an argument is passed to this method this is used as the conf file.
  2) If the enviroment variable ENSEMBL_REGISTRY is set this is used.
  3) If the file .ensembl_init exist in the home directory it is used

  Arg [1]    : (optional) string $arg file to load the registry from
  Example    : Bio::EnsEMBL::Registry->load_all();
  Returntype : none
  Exceptions : none


=cut
 
sub load_all{
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  my $class = shift;
  my $web_reg = shift;
  
  #$registry_register{'_WARN'} = 0; # default report overwriting
  if(defined($registry_register{'seen'})){
    print STDERR "Clearing previuosly loaded configuration from Registry\n";
    $class->clear();
  }
  $registry_register{'seen'}=1;
  if(defined($web_reg)){
    print STDERR  "Loading conf from site defs file ".$web_reg."\n";
    if(-e $web_reg){
      unless (my $return = do $web_reg ){
	throw "Error in Configuration\n $!\n";
      }
      # other wise it gets done again by the web initialisation stuff
      delete $INC{$web_reg}; 
      }
  }
  elsif(defined($ENV{ENSEMBL_REGISTRY}) and -e $ENV{ENSEMBL_REGISTRY}){
    my $file = $ENV{ENSEMBL_REGISTRY};
    print STDERR  "Loading conf from ".$file."\n";
    unless (my $return = do $ENV{ENSEMBL_REGISTRY}){
      throw "Configuration error in $file: $@" if $@;
      throw "Configuration error in $file: $!" unless defined $return;
      throw "Configuration error in $file" unless $return;
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    }
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  }
  elsif(-e $ENV{HOME}."/.ensembl_init") {
    my $file = $ENV{HOME}."/.ensembl_init";
    my $return;
    
    unless( my $return =  do( $file )) {
      throw "Configuration error in $file: $@" if $@;
      throw "Configuration error in $file: $!" unless defined $return;
      throw "Configuration error in $file" unless $return;
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    }
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  }
  else{
    print STDERR "NO default configuration to load\n";
  }
}


=head2 clear
 Will clear the registry and disconnect from all databases.

  Example    : Bio::EnsEMBL::Registry->clear();
  Returntype : none
  Exceptions : none


=cut

sub clear{
  my ($self);
  
  foreach my $dba (@{$registry_register{'_DBA'}}){
    print $dba."\n";
    if($dba->dbc->connected){
      $dba->dbc->db_handle->disconnect();
    }
  }
  %registry_register = undef;
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}

#
# add ons.
#

=head2 add_db

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  Arg [1]    : db (DBAdaptor) to add adaptor to.
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  Arg [2]    : name of the name to add the adaptor to in the registry.
  Arg [3]    : The adaptor to be added to the registry.
  Example    : Bio::EnsEMBL::Registry->add_db($db, "lite", $dba);
  Returntype : none
  Exceptions : none

=cut

sub add_db{
  my ($class, $db, $name, $adap) = @_;


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  if(lc($db->species()) ne lc($adap->species)){
    $registry_register{lc($db->species())}{lc($db->group())}{'_special'}{lc($name)} = $adap;
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  }
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}

=head2 remove_db

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  Arg [1]    : db (DBAdaptor) to remove adaptor from.
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  Arg [2]    : name to remove the adaptor from in the registry.
  Example    : my $db = Bio::EnsEMBL::Registry->remove_db($db, "lite");
  Returntype : adaptor
  Exceptions : none

=cut

sub remove_db{
  my ($class, $db, $name) = @_;

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  my $ret = $registry_register{lc($db->species())}{lc($db->group())}{'_special'}{lc($name)};
  $registry_register{lc($db->species())}{lc($db->group())}{'_special'}{lc($name)} = undef;
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  return $ret;
}

=head2 get_db

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  Arg [1]    : db (DBAdaptor) to get adaptor from.
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  Arg [2]    : name to get the adaptor for in the registry.
  Example    : my $db = Bio::EnsEMBL::Registry->get_db("Human", "core", "lite");
  Returntype : adaptor
  Exceptions : none

=cut

sub get_db{
  my ($class, $db, $name) = @_;

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  my $ret = Bio::EnsEMBL::Registry->get_DBAdaptor(lc($db->species),lc($name));
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  if(defined($ret)){
    return $ret;
  }
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  return $registry_register{lc($db->species())}{lc($db->group())}{'_special'}{lc($name)};
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}

=head2 get_all_db_adaptors

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  Arg [1]    : db (DBAdaptor) to get all the adaptors from.
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  Example    : my $db = Bio::EnsEMBL::Registry->get_all_db_adaptors($db);
  Returntype : adaptor
  Exceptions : none

=cut

sub get_all_db_adaptors{
  my ($class,$db) = @_;
  my %ret=();

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# we now also want to add all the DBAdaptors for the same species.
# as add_db_adaptor does not add if it is from the same species.

  foreach my $dba (@{$registry_register{'_DBA'}}){
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    if(lc($dba->species()) eq lc($db->species())){
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      $ret{$dba->group()} = $dba;
    } 
  }

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 foreach my $key (keys %{$registry_register{$class->get_alias($db->species())}{lc($db->group())}{'_special'}}){
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   $ret{$key} = $registry_register{$class->get_alias($db->species())}{lc($db->group())}{'_special'}{$key};
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 }

  return \%ret;
}


#
# DBAdaptors
#

=head2 add_DBAdaptor

  Arg [1]    : name of the species to add the adaptor to in the registry.
  Arg [2]    : name of the group to add the adaptor to in the registry.
  Arg [3]    : The DBAaptor to be added to the registry.
  Example    : Bio::EnsEMBL::Registry->add_DBAdaptor("Human", "core", $dba);
  Returntype : none
  Exceptions : none

=cut

sub add_DBAdaptor{
  my ($class, $species, $group, $adap) = @_;

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  if(!($class->alias_exists($species))){
    $class->add_alias($species,$species);
  }
  

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  $species = $class->get_alias($species);

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  $registry_register{$species}{lc($group)}{'_DB'} = $adap;
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  if(!defined($registry_register{'_DBA'})){
    my @list =();
    push(@list,$adap);
    $registry_register{'_DBA'}= \@list;
  }
  else{
    push(@{$registry_register{'_DBA'}},$adap);
  }

}



=head2 get_DBAdaptor

  Arg [1]    : name of the species to get the adaptor for in the registry.
  Arg [2]    : name of the group to get the adaptor for in the registry.
  Example    : $dba = Bio::EnsEMBL::Registry->get_DBAdaptor("Human", "core");
  Returntype : DBAdaptor
  Exceptions : none

=cut

sub get_DBAdaptor{
  my ($class, $species, $group) = @_;

  $species = $class->get_alias($species);

  if(defined($group)){ # group defined so return standard DB Adaptor
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    return  $registry_register{$species}{lc($group)}{'_DB'};
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  }
  else{ #return a merged db adaptor
    return  new_merged Bio::EnsEMBL::DBSQL::DBAdaptor($species);
  }
}

=head2 get_all_DBAdaptors

  Example    : @dba = @{Bio::EnsEMBL::Registry->get_all_DBAdaptors();
  Returntype : list of DBAdaptors
  Exceptions : none

=cut

sub get_all_DBAdaptors{
  my ($class)=@_;

  return @{$registry_register{'_DBA'}};
}

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=head2 get_all_DBAdaptors_by_connection

  Arg [1]    :dbconnection to use to find DBAdaptors
  Returntype : reference to list of DBAdaptors
  Exceptions : none.
  Example    : @dba = @{Bio::EnsEMBL::Registry->get_all_DBAdaptors_by_connection($dbc);

=cut

sub get_all_DBAdaptors_by_connection{
  my ($self, $dbc_orig) = @_;
  my @return;

  foreach my $dba ( @{$registry_register{'_DBA'}}){
    my $dbc = $dba->dbc;
    if($dbc->equals($dbc_orig)){
      push @return, $dba;
    }
  }
  return \@return;
}


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#
# DNA Adaptors
#

=head2 add_DNAAdaptor

  Arg [1]    : name of the species to add the adaptor to in the registry.
  Arg [2]    : name of the group to add the adaptor to in the registry.
  Arg [3]    : The adaptor to be added to the registry as a DNA adaptor.
  Example    : Bio::EnsEMBL::Registry->add_DNAAdaptor("Human", "core", $dnaAdap);
  Returntype : none
  Exceptions : none

=cut

sub add_DNAAdaptor{
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  my ($class, $species, $group, $dnadb_species, $dnadb_group) = @_;
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  $species = $class->get_alias($species);
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  $dnadb_species = $class->get_alias($dnadb_species);
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  if($dnadb_group->isa('Bio::EnsEMBL::DBSQL::DBAdaptor')){
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    deprecated("");
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  }
  else{
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    $registry_register{$species}{lc($group)}{'_DNA'} = $dnadb_group;
    $registry_register{$species}{lc($group)}{'_DNA2'} = $dnadb_species;
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  }
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}

=head2 get_DNAAdaptor

  Arg [1]    : name of the species to get the adaptor for in the registry.
  Arg [2]    : name of the group to get the adaptor for in the registry.
  Example    : $dnaAdap = Bio::EnsEMBL::Registry->get_DNAAdaptor("Human", "core");
  Returntype : adaptor
  Exceptions : none

=cut

sub get_DNAAdaptor{
  my ($class, $species, $group) = @_;

  $species = $class->get_alias($species);
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  my $new_group = $registry_register{$species}{lc($group)}{'_DNA'};
  my $new_species = $registry_register{$species}{lc($group)}{'_DNA2'};
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  if( defined $new_group ) {
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    return  $class->get_DBAdaptor($new_species,$new_group);
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  } else {
    return undef;
  }
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}

#
# General Adaptors
#

=head2 add_adaptor

  Arg [1]    : name of the species to add the adaptor to in the registry.
  Arg [2]    : name of the group to add the adaptor to in the registry.
  Arg [3]    : name of the type to add the adaptor to in the registry.
  Arg [4]    : The DBAaptor to be added to the registry.
  Arg [5]    : (optional) if set okay to overwrite.
  Example    : Bio::EnsEMBL::Registry->add_adaptor("Human", "core", "Gene", $adap);
  Returntype : none
  Exceptions : none


=cut

sub add_adaptor{
  my ($class,$species,$group,$type,$adap, $reset)= @_;

  $species = $class->get_alias($species);

#
# Becouse the adaptors are not stored initially only there class paths when
# the adaptors are obtained we need to store these instead.
# It is not necessarily an error if the registry is overwritten without
# the reset set but it is an indication that we are overwriting a database
# which should be a warning for now
#

  if(defined($reset)){ # JUST REST THE HASH VLAUE NO MORE PROCESSING NEEDED
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    $registry_register{$species}{lc($group)}{lc($type)} = $adap;
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    return;
  }
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  if(defined($registry_register{$species}{lc($group)}{lc($type)})){ 
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    print STDERR ("Overwriting Adaptor in Registry for $species $group $type\n");
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    $registry_register{$species}{lc($group)}{lc($type)} = $adap;
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   return;
  }
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  $registry_register{$species}{lc($group)}{lc($type)} = $adap;
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  if(!defined ($registry_register{$species}{'list'})){
    my @list =();
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    push(@list,$type);
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    $registry_register{$species}{'list'}= \@list;
  }
  else{
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    push(@{$registry_register{$species}{'list'}},$type);
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  }

#  print STDERR "REGADD  $species \t $group \t $type\t to the registry\n";

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  if(!defined ($registry_register{lc($type)}{$species})){
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    my @list =();
    push(@list,$adap);
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    $registry_register{lc($type)}{$species}= \@list;
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  }
  else{
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    push(@{$registry_register{lc($type)}{$species}},$adap);
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  }

}


=head2 get_adaptor

  Arg [1]    : name of the species to add the adaptor to in the registry.
  Arg [2]    : name of the group to add the adaptor to in the registry.
  Arg [3]    : name of the type to add the adaptor to in the registry.
  Example    : $adap = Bio::EnsEMBL::Registry->get_adaptor("Human", "core", "Gene");
  Returntype : adaptor
  Exceptions : none

=cut

sub get_adaptor{
  my ($class,$species,$group,$type)= @_;
 
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  $species = $class->get_alias($species);
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  my %dnadb_adaptors = qw(sequence  1 assemblymapper 1  karyotypeband 1 repeatfeature 1 coordsystem 1  assemblyexceptionfeature 1 );
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  my $dnadb_group =  $registry_register{$species}{lc($group)}{_DNA};
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  if( defined($dnadb_group) && defined($dnadb_adaptors{lc($type)}) ) {
      $species = $registry_register{$species}{lc($group)}{'_DNA2'};
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      $group = $dnadb_group;
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  }

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  my $ret = $registry_register{$species}{lc($group)}{lc($type)};
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  if(!defined($ret)){
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    return undef;
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  }
  if(!ref($ret)){ # not instantiated yet
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    my $dba = $registry_register{$species}{lc($group)}{'_DB'};
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    my $module = $ret;
    eval "require $module";

    if($@) {
      warning("$module cannot be found.\nException $@\n");
      return undef;
    }
    my $adap = "$module"->new($dba);
    Bio::EnsEMBL::Registry->add_adaptor($species, $group, $type, $adap, "reset");
    $ret = $adap;
  }

  return $ret;
}

=head2 get_all_adaptors

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  Arg [SPECIES] : (optional) string 
                  species name to get adaptors for
  Arg [GROUP] : (optional) string 
                  group name to get adaptors for
  Arg [TYPE] : (optional) string 
                  type to get adaptors for
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  Example    : @adaps = @{Bio::EnsEMBL::Registry->get_all_adaptors()};
  Returntype : list of adaptors
  Exceptions : none

=cut

sub get_all_adaptors{
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  my ($class,@args)= @_;
  my ($species, $group, $type);
  my @ret=();
  my (%species_hash, %group_hash, %type_hash);
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  if(@args == 1){ #old species only one parameter
    warn("-SPECIES argument should now be used to get species adaptors");
    $species = $args[0];
  }
  else{
    # new style -SPECIES, -GROUP, -TYPE
    ($species, $group, $type) =
      rearrange([qw(SPECIES GROUP TYPE)], @args);
  }

  if(defined($species)){
    $species_hash{$species} = 1;
  }
  else{
    # get list of species
    foreach my $dba (@{$registry_register{'_DBA'}}){
      $species_hash{lc($dba->species())} = 1;
    }
  }
  if(defined($group)){
    $group_hash{$group} = 1;
  }
  else{
    foreach my $dba (@{$registry_register{'_DBA'}}){
      $group_hash{lc($dba->group())} = 1;
    }
  }
  if(defined($type)){
    $type_hash{$type} =1;
  }
  else{
    foreach my $dba (@{$registry_register{'_DBA'}}){ 
	foreach my $ty (@{$registry_register{$dba->species}{'list'}}){
	  $type_hash{lc($ty)} = 1;
	}
      }
  }
  
  ### NOW NEED TO INSTANTIATE BY CALLING get_adaptor
  foreach my $sp (keys %species_hash){
    foreach my $gr (keys %group_hash){
      foreach my $ty (keys %type_hash){
	my $temp = $class->get_adaptor($sp,$gr,$ty);
	if(defined($temp)){
	  push @ret, $temp;
	}
      }
    }
  }
  return (\@ret);
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}


=head2 add_alias

  Arg [1]    : name of the species to add alias for
  Arg [2]    : name of the alias
  Example    : Bio::EnsEMBL::Registry->add_alias("Homo Sapiens","Human");
  Description: add alternative name for the species.
  Returntype : none
  Exceptions : none

=cut

sub add_alias{
  my ($class, $species,$key) = @_;

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  $registry_register{'_ALIAS'}{lc($key)} = lc($species);
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}

=head2 get_alias

  Arg [1]    : name of the possible alias to get species for
  Example    : Bio::EnsEMBL::Registry->get_alias("Human");
  Description: get proper species name.
  Returntype : species name
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  Exceptions : none
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=cut

sub get_alias{
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  my ($class, $key) = @_;
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  if(!defined($registry_register{'_ALIAS'}{lc($key)})){
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    return $key;
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  }
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  return $registry_register{'_ALIAS'}{lc($key)};
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}
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=head2 alias_exists

  Arg [1]    : name of the possible alias to get species for
  Arg [2]    : if set will not throw if not found.
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  Example    : Bio::EnsEMBL::Registry->alias_exists("Human");
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  Description: does the species name exist.
  Returntype : 1 if exists else 0
  Exceptions : none

=cut

sub alias_exists{
  my ($class, $key) = @_;

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  if(defined($registry_register{'_ALIAS'}{lc($key)})){
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    return 1;
  }
  return 0;
}
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sub set_disconnect_when_inactive{
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  foreach my $dba ( @{get_all_DBAdaptors()}){
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    my $dbc = $dba->dbc;
    #disconnect if connected
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    $dbc->disconnect_if_idle() if $dbc->connected();
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    $dbc->disconnect_when_inactive(1);
  }
}
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sub disconnect_all {
  foreach my $dba ( get_all_DBAdaptors() ){
    my $dbc = $dba->dbc;
    #disconnect if connected
    $dbc->disconnect_if_idle() if $dbc->connected();
  }
}
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=head2 change_access

  Will change the username and password for a set of databases.
  if host,user or database names are missing then these are not checked.
  So for example if you do not specify a database then ALL databases on
  the specified  host and port will be changed.

  Arg [1]    : name of the host to change access on
  Arg [2]    : port number to change access on
  Arg [3]    : name of the user to change access on
  Arg [4]    : name of the database to change access on
  Arg [5]    : name of the new user
  Arg [6]    : new password

  Example    : Bio::EnsEMBL::Registry->get_alias("Human");
  Description: change username and password on one or more databases
  Returntype : none
  Exceptions : none

=cut

sub change_access{
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my $self = shift;
    my ($host,$port,$user,$dbname,$new_user,$new_pass) = @_;
    foreach my $dba ( @{$registry_register{'_DBA'}}){
	my $dbc = $dba->dbc;
	if((!defined($host) or $host eq $dbc->host) and
	   (!defined($port) or $port eq $dbc->port) and
	   (!defined($user) or $user eq $dbc->username) and
	   (!defined($dbname) or $dbname eq $dbc->dbname)){
	    if($dbc->connected()){
		$dbc->db_handle->disconnect();
		$dbc->connected(undef);
	    }
	    # over write the username and password
	    $dbc->username($new_user);
	    $dbc->password($new_pass);
	}
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    }
}

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=head2 load_registry_from_db
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  Arg [HOST] : The domain name of the database host to connect to.
               
  Arg [USER] : string
               The name of the database user to connect with
  Arg [PASS] : (optional) string
               The password to be used to connect to the database
  Arg [PORT] : int
               The port to use when connecting to the database
  Arg [VERBOSE]: (optional) Wether to print database messages 

  Example : load_registry_from_db( -host => 'ensembldb.ensembl.org',
				   -user => 'anonymous',
				   -verbose => "1" );

  Description: Will load the latest versions of the ensembl databases it
               can find on a database instance into the registry.

  Exceptions : None.
 
=cut
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sub load_registry_from_db{
  my($self, @args) = @_;
  my ($host, $port, $user, $pass, $verbose) =
    rearrange([qw(HOST PORT USER PASS VERBOSE)], @args);



  my $go_version = 0;
  my $compara_version =0;

  $user ||= "ensro";
  my $db = DBI->connect( "DBI:mysql:host=$host;port=$port" , $user, $pass );

  my $res = $db->selectall_arrayref( "show databases" );
  my @dbnames = map {$_->[0] } @$res;
  
  my %temp;
  for my $db (@dbnames){
    if($db =~ /^([a-z]+_[a-z]+_[a-z]+)_(\d+)_(\d+[a-z]*)/){
      if(defined($temp{$1})){
	my ($r1,$r2) = split($temp{$1},"_");
	if($r1 < $2){
	  $temp{$1} = $2."_".$3;
	}
      }
      else{
	$temp{$1} = $2."_".$3;
      }
    }
    elsif($db =~ /^ensembl_compara_(\d+)/){
      if($compara_version < $1){
	$compara_version = $1;
      }
    }
    elsif($db =~ /^ensembl_go_(\d+)/){
      if($go_version < $1){
	$go_version = $1;
      }
    }
  }
  
  @dbnames =();
  
  foreach my $key ( keys %temp){
    push @dbnames, $key."_".$temp{$key};
  }	 
  # register core databases
  
  my @core_dbs = grep { /^[a-z]+_[a-z]+_core_\d+_/ } @dbnames;
  
  for my $coredb ( @core_dbs ) {
    my ($species, $num ) = ( $coredb =~ /(^[a-z]+_[a-z]+)_core_(\d+)/ );
    my $dba = Bio::EnsEMBL::DBSQL::DBAdaptor->new
      ( -group => "core",
	-species => $species,
	-host => $host,
	-user => $user,
	-pass => $pass,
	-port => $port,
	-dbname => $coredb
      );
    (my $sp = $species ) =~ s/_/ /g;
    $self->add_alias( $species, $sp );
    print $coredb." loaded\n" if ($verbose);
  }
  
  my @estgene_dbs = grep { /^[a-z]+_[a-z]+_estgene_\d+_/ } @dbnames;
  
  for my $estgene_db ( @estgene_dbs ) {
    my ($species, $num) = ( $estgene_db =~ /(^[a-z]+_[a-z]+)_estgene_(\d+)/ );
    my $dba = Bio::EnsEMBL::DBSQL::DBAdaptor->new
      ( -group => "estgene",
	-species => $species,
	-host => $host,
	-user => $user,
	-pass => $pass,
	-port => $port,
	-dbname => $estgene_db
      );
    print $estgene_db." loaded\n" if ($verbose);
  }
  
  
  eval "require Bio::EnsEMBL::Variation::DBSQL::DBAdaptor";
  if($@) {
    #ignore variations as code required not there for this
    print "Bio::EnsEMBL::Variation::DBSQL::DBAdaptor module not found so variation databases will be ignored if found\n" if ($verbose);
  }
  else{
    my @variation_dbs = grep { /^[a-z]+_[a-z]+_variation_\d+_/ } @dbnames;
    
    for my $variation_db ( @variation_dbs ) {
      my ($species, $num ) = ( $variation_db =~ /(^[a-z]+_[a-z]+)_variation_(\d+)/ );
      my $dba = Bio::EnsEMBL::Variation::DBSQL::DBAdaptor->new
	( -group => "variation",
	  -species => $species,
	  -host => $host,
	  -user => $user,
	  -pass => $pass,
	  -port => $port,
	  -dbname => $variation_db
	);
      print $variation_db." loaded\n" if ($verbose);
    }
  }
  
  #Compara
  if($compara_version){
    eval "require Bio::EnsEMBL::Compara::DBSQL::DBAdaptor";
    if($@) {
      #ignore compara as code required not there for this
      print "Bio::EnsEMBL::Compara::DBSQL::DBAdaptor not found so compara database ensembl_compara_$compara_version will be ignored\n" if ($verbose);
    }
    else{
      my $compara_db = "ensembl_compara_".$compara_version;

      my $dba = Bio::EnsEMBL::Compara::DBSQL::DBAdaptor->new
	( -group => "compara",
	  -species => "multi",
	  -host => $host,
	  -user => $user,
	  -pass => $pass,
	  -port => $port,
	  -dbname => $compara_db
	);
      print $compara_db." loaded\n" if ($verbose);       
    }
  }
  else{
    print "No Compara database found" if ($verbose);
  }


  #GO
  if($go_version){
    eval "use Bio::EnsEMBL::ExternalData::GO::GOAdaptor";
    if($@) {
      #ignore go as code required not there for this
      print "Bio::EnsEMBL::ExternalData::GO::GOAdaptor::DBAdaptor not found so go database ensemb_go_$go_version will be ignored\n" if ($verbose);
    }
    else{
      my $go_db = "ensembl_go_".$go_version;
      my $dba = Bio::EnsEMBL::ExternalData::GO::GOAdaptor->new
	( -group => "go",
	  -species => "multi",
	  -host => $host,
	  -user => $user,
	  -pass => $pass,
	  -port => $port,
	  -dbname => $go_db
	);
      print $go_db." loaded\n" if ($verbose);              
    }
  }
  else{
    print "No go database found" if ($verbose);
  }
  
}
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#
# Web specific routines
#


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=head2 load_registry_with_web_adaptors
  Will load the registry with all the Adaptors used in the Web server.
  Providing Sitedefs and SpeciesDefs can be found on PERL5LIB path.

  Example    : Bio::EnsEMBL::Registry->load_registry_with_web_adaptors();
  Returntype : none
  Exceptions : Will die if Sitedefs or SpeciesDefs is not found on the
               PERL5LIB path.

=cut

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sub load_registry_with_web_adaptors{
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  my $class = shift;


  eval{ require SiteDefs };
  if ($@){ die "Can't use SiteDefs.pm - $@\n"; }
    SiteDefs->import(qw(:ALL));

  eval{ require SpeciesDefs };
  if ($@){ die "Can't use SpeciesDefs.pm - $@\n"; }
  my $conf = new SpeciesDefs();
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  my %species_alias = %{$SiteDefs::ENSEMBL_SPECIES_ALIASES};

  foreach my $spec (keys %species_alias){
    Bio::EnsEMBL::Registry->add_alias($species_alias{$spec},$spec);
  }
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}

=head2 set_default_track
  Sets a flag to say that that this species/group are a default track and do not
  need to be added as another web track.

  Arg [1]    : name of the species to get the adaptors for in the registry.
  Arg [2]    : name of the type to get the adaptors for in the registry.
  Example    : $merged = Bio::EnsEMBL::Registry->set_default_track("Human","core");
  Returntype : none
  Exceptions : none

=cut

sub set_default_track{
  my ($class, $species, $group) = @_;  

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  $species = get_alias($species);
  $registry_register{'def_track'}{$species}{lc($group)} = 1;
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}

=head2 default_track
  Check flag to see if this is a default track

  Arg [1]    : name of the species to get the adaptors for in the registry.
  Arg [2]    : name of the type to get the adaptors for in the registry.
  Example    : $merged = Bio::EnsEMBL::Registry->set_default_track("Human","core");
  Returntype : int 
  Exceptions : none

=cut

sub default_track{
  my ($class, $species, $group) = @_;  

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  $species = get_alias($species);
  if(defined($registry_register{'def_track'}{$species}{lc($group)})){
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    return 1;
  }
  
  return 0;
}


=head2 add_new_tracks
  Will add new gene tracks to the configuration of the WEB server if they are
  not of the type default and the configuration already has genes in the display.

  Arg [1]    : hash of the default configuration of the web page
  Returntype : none
  Exceptions : none
  Called by  : UserConfig.pm
  
=cut

sub add_new_tracks{
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  my($class, $conf, $pos) = @_;
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  my $start = 0;
  my $reg = $class;
  my $species_reg = $reg->get_alias($conf->{'species'},"nothrow");
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  my %pars;
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#  print STDERR "Species $species_reg check for default tracks\n";
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  if(defined($species_reg)){
    foreach my $dba ($reg->get_all_DBAdaptors()){
      if(!$reg->default_track($dba->species,$dba->group)){
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	$pars{'available'} = "species ".$reg->get_alias($dba->species());
	$pars{'db_alias'} = $dba->group();
#	print STDERR "Adding new track for ".$dba->species."\t".$dba->group."\n";
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	$conf->add_new_track_generictranscript('',$dba->group(), "black",$pos,%pars);
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	$pos++;
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      }
    }
  }
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  return $pos;

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}


1;