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#
# Author:: Seth Falcon (<seth@opscode.com>)
# Copyright:: Copyright (c) 2010-2011 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
require 'treetop'
require 'chef/solr_query/lucene_nodes'
class Chef
class Exceptions
class QueryParseError < StandardError
end
end
end
class Chef
class SolrQuery
class QueryTransform
@@base_path = File.expand_path(File.dirname(__FILE__))
Treetop.load(File.join(@@base_path, 'lucene.treetop'))
@@parser = LuceneParser.new
def self.parse(data)
tree = @@parser.parse(data)
msg = "Parse error at offset: #{@@parser.index}\n"
msg += "Reason: #{@@parser.failure_reason}"
raise Chef::Exceptions::QueryParseError, msg if tree.nil?
self.clean_tree(tree)
tree.to_array
end
def self.transform(data)
return "*:*" if data == "*:*"
tree = @@parser.parse(data)
msg = "Parse error at offset: #{@@parser.index}\n"
msg += "Reason: #{@@parser.failure_reason}"
raise Chef::Exceptions::QueryParseError, msg if tree.nil?
self.clean_tree(tree)
tree.transform
end
private
def self.clean_tree(root_node)
return if root_node.elements.nil?
root_node.elements.delete_if do |node|
node.class.name == "Treetop::Runtime::SyntaxNode"
end
root_node.elements.each { |node| self.clean_tree(node) }
end
end
end
end
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