#

# CDDL HEADER START

#

# The contents of this file are subject to the terms of the

# Common Development and Distribution License (the "License").

# You may not use this file except in compliance with the License.

#

# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

# or http://www.opensolaris.org/os/licensing.

# See the License for the specific language governing permissions

# and limitations under the License.

#

# When distributing Covered Code, include this CDDL HEADER in each

# file and include the License file at usr/src/OPENSOLARIS.LICENSE.

# If applicable, add the following below this CDDL HEADER, with the

# fields enclosed by brackets "[]" replaced with your own identifying

# information: Portions Copyright [yyyy] [name of copyright owner]

#

# CDDL HEADER END

#

#

# Use is subject to license terms.

#

REQUIRE = 0

OPTIONAL = 1

INCORPORATE = 10

class Dependency(object):

        """A Dependency object is a relationship between one Package and

        another.  It is a bidirectional expression.

        A package may require a minimum version of another package."""

        def __init__(self, host_pkg_fmri, req_pkg_fmri, type = REQUIRE):

                self.host_pkg_fmri = host_pkg_fmri

                self.req_pkg_fmri = req_pkg_fmri

                assert type == REQUIRE \

                    or type == INCORPORATE \

                    or type == OPTIONAL

                self.type = type

        def satisfied(self, pkg_fmri):

                # compare pkg_fmri to req_pkg_fmri

                # compare versions

                return False

	def __repr__(self):

		if self.type == REQUIRE:

			return "%s => %s" % \

				(self.host_pkg_fmri, self.req_pkg_fmri)

		elif self.type == OPTIONAL:

			return "%s o> %s" % \

				(self.host_pkg_fmri, self.req_pkg_fmri)

		elif self.type == INCORPORATE:

			return "%s >> %s" % \

				(self.host_pkg_fmri, self.req_pkg_fmri)