History documentation.

Bio::Tools::EUtilities::History - lightweight implementation of HistoryI
interface (not bound to filehandles, extraneous methods, etc).

  #should work for any class which is-a HistoryI

  if ($obj->has_History) {
      # do something here
  }

  ($webenv, $querykey) = $obj->history;

  $obj->history($webenv, $querykey);

  $webenv = $obj->get_webenv;

  $query_key = $obj->get_query_key;

This class extends methods for any EUtilDataI implementation allow instances to
dealwith NCBI history data (WebEnv and query_key). These can be used as
parameters for further queries against data sets stored on the NCBI server, much
like NCBI's Entrez search history. These are important when one wants to run
complex queries using esearch, retrieve related data using elink, and retrieve
large datasets using epost/efetch.
This class is the simplest implementation and merely holds data for future
queries from any HistoryI. See also Bio::Tools::EUtilities::Query (esearch) and
Bio::Tools::EUtilities::LinkSet (elink), which also implement HistoryI.

sub new {

    my ($class, @args) = @_;
    my $self = $class->SUPER::new(@args);
    my ($eutil) = $self->_rearrange([qw(eutil)],@args);
    $eutil || $self->throw('eutil not defined');
    $self->eutil($eutil);
    $self->datatype('history');
    return $self;

}

sub _add_data {

    my ($self, $simple) = @_;
    if (!exists $simple->{WebEnv} || !exists $simple->{QueryKey}) {
        $self->debug("Data:",Dumper($simple));
        $self->throw("Missing webenv/query key in history output");
    }
    $self->{_webenv} = $simple->{WebEnv} && delete $simple->{WebEnv};
    $self->{_querykey} = $simple->{QueryKey} && delete $simple->{QueryKey};

}

sub to_string {

    my $self = shift;
    my $string;
    my %map = (
        'get_webenv' => 'WebEnv',
        'get_query_key' => 'Key'
        );
    for my $m (qw(get_webenv get_query_key)) {
        $string .= sprintf("%-20s:%s\n", $map{$m}, $self->$m);
    }
    return $string;
}

1;

}

User feedback is an integral part of the evolution of this and other Bioperl
modules. Send your comments and suggestions preferably to one of the Bioperl
mailing lists. Your participation is much appreciated.

  bioperl-l@lists.open-bio.org               - General discussion
  http://www.bioperl.org/wiki/Mailing_lists  - About the mailing lists

Please direct usage questions or support issues to the mailing list:
bioperl-l@bioperl.org
rather than to the module maintainer directly. Many experienced and
reponsive experts will be able look at the problem and quickly
address it. Please include a thorough description of the problem
with code and data examples if at all possible.

Report bugs to the Bioperl bug tracking system to help us keep track the bugs
and their resolution. Bug reports can be submitted via the web.

  https://redmine.open-bio.org/projects/bioperl/

 Title    : history
 Usage    : my ($webenv, $qk) = $hist->history
 Function : Get/Set two-element list of webenv() and query_key()
 Returns  : array
 Args     : two-element list of webenv, query key

 Title    : get_webenv
 Usage    : my $webenv = $hist->get_webenv
 Function : returns web environment key needed to retrieve results from
            NCBI server
 Returns  : string (encoded key)
 Args     : none

 Title    : get_query_key
 Usage    : my $qk = $hist->get_query_key
 Function : returns query key (integer) for the history number for this session
 Returns  : integer
 Args     : none

new	No description	Code
_add_data	No description	Code
to_string	Description	Code