extension.pm

普通的ETL工具

# vim:ts=4 sw=4
# ----------------------------------------------------------------------------------------------------
#  Name		: ETL::Pequel3::Type::Section::Extension.pm
#  Created	: 22 June 2006
#  Author	: Mario Gaffiero (gaffie)
#
# Copyright 1999-2007 Mario Gaffiero.
# 
# This file is part of Pequel(TM).
# 
# Pequel is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
# 
# Pequel is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with Pequel; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
# ----------------------------------------------------------------------------------------------------
# Modification History
# When          Version     Who     What
# ----------------------------------------------------------------------------------------------------
package ETL::Pequel3::Type::Section::Extension;
require 5.005_62;
use strict;
use warnings;
use ETL::Pequel3::Type::Section;
# ----------------------------------------------------------------------------------------------------
{
	package ETL::Pequel3::Type::Section::Extension;
	use base qw(ETL::Pequel3::Type::Section::Abstract);
	use Class::STL::ClassMembers
		Class::STL::ClassMembers::DataMember->new(name => 'target_mem_name', default => 'section_name'),
		Class::STL::ClassMembers::DataMember->new(name => 'section_name', default => 'extension'),
		Class::STL::ClassMembers::DataMember->new(name => 'item_type', default => 'ETL::Pequel3::Type::Section::Extension::Item'),
		Class::STL::ClassMembers::DataMember->new(name => 'element_type', default => "@{[ __PACKAGE__ ]}"),
		Class::STL::ClassMembers::DataMember->new(name => 'description', default => "This section is used to declare any required pequel-extension packages. The extension will be loaded and added to the appropriate F<type catalogue>. Set the F<package_name> attribute to the fully qualified package name (eg: C<ETL::Pequel3::Type::DataSet::Apache>).\n\n\nFor detailed instructions in building a I<pequel type extension> please refer to the F<Pequel Programmers Reference> manual.");
	use Class::STL::ClassMembers::Constructor;
	sub add_item
	{
		my $self = shift;
		$self->SUPER::add_item(@_);
		foreach my $i ($self->items()->back()) 
		{
#TODO:		eval "@{[ defined($i->lib_path) ? qq{use lib '';} : '' ]}"
			#NOTE: this eval needs to happen early (not in prepare) so new names will be available
			#when referenced by other sections' add_item();
			eval "use @{[ $i->package_name() ]};"; #NOTE: need to 'use' so import() function is called;
			$self->err()->trace_msg(10, "@{[ $self->pequel_ref()->pequel_name() ]} -->"
				. "Extension:"
				. $i->package_name()
				. " --> " 
				. ($@ ? "($@)" : "Loaded OK") # --> TODO:print the version...
			);
		}
		$self->err()->user_error(10256, "$@") if ($@);
		return $self;
	}
	sub prepare
	{
		my $self = shift;
	}
	package ETL::Pequel3::Type::Section::Extension::Item;
	use base qw(ETL::Pequel3::Type::Section::Item::Abstract);
	use Class::STL::ClassMembers;
	use Class::STL::ClassMembers::Constructor;
	sub new_extra
	{
		my $self = shift;
		$self->attributes()->push_back(
			$self->attributes()->factory(name => 'package_name', required => 1),
		);
	}
}
# ----------------------------------------------------------------------------------------------------
1;