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# Author:: Adam Jacob (<adam@hjksolutions.com>)
# Copyright:: Copyright (c) 2008 HJK Solutions, LLC
# License:: GNU General Public License version 2 or later
#
# This program and entire repository 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; either version 2 of the License, or any later version.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
require 'rubygems'
require 'rgl/adjacency'
require 'rgl/topsort'
require 'rgl/dot'
class Marionette
module Mixin
module GraphResources
# Find existing resources by searching the list of existing resources. Takes
# a hash of :resource_name => name, or :resource_name => [ name1, name2 ].
#
# Returns one or an Array of matching resources.
#
# Raises a Runtime Error if it can't find the resources you are looking for.
def resources(args)
unless args.kind_of?(Hash)
raise ArgumentError, "resource requires a hash of :resources => names"
end
to_find = Array.new
args.each do |resource_name, name_matches|
names = name_matches.kind_of?(Array) ? name_matches : [ name_matches ]
names.each do |name|
to_find.push({
:resource_name => resource_name,
:name => name,
:found => false,
:object => nil}
)
end
end
@dg.each_vertex do |vres|
next if vres == :top
to_find.each do |resource|
if vres.resource_name == resource[:resource_name]
if vres.name == resource[:name]
resource[:found] = true
resource[:object] = vres
break
end
end
end
end
results = Array.new
errors = Array.new
to_find.each do |r|
if r[:found]
results.push(r)
else
errors.push(r)
end
end
if errors.length > 0
msg = "Cannot find resources (maybe not evaluated yet?):\n"
errors.each do |e|
msg << " #{e[:resource_name].to_s}: #{e[:name].to_s}\n"
end
raise RuntimeError, msg
end
results.length == 1 ? results[0][:object] : results.collect { |r| r[:object] }
end
end
end
end
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