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# Licensed to Elasticsearch B.V. under one or more contributor
# license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright
# ownership. Elasticsearch B.V. licenses this file to you 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.
module Elasticsearch
module DSL
module Search
# Module containing common functionality for aggregation DSL classes
#
module BaseAggregationComponent
def self.included(base)
base.__send__ :include, BaseComponent
base.__send__ :include, InstanceMethods
end
module InstanceMethods
attr_reader :aggregations
# Looks up the corresponding class for a method being invoked, and initializes it
#
# @raise [NoMethodError] When the corresponding class cannot be found
#
def method_missing(name, *args, &block)
klass = Utils.__camelize(name)
if Aggregations.const_defined? klass
@value = Aggregations.const_get(klass).new *args, &block
else
raise NoMethodError, "undefined method '#{name}' for #{self}"
end
end
# Adds a nested aggregation into the aggregation definition
#
# @return [self]
#
def aggregation(*args, &block)
@aggregations ||= AggregationsCollection.new
@aggregations.update args.first => Aggregation.new(*args, &block)
self
end
# Convert the aggregations to a Hash
#
# A default implementation, DSL classes can overload it.
#
# @return [Hash]
#
def to_hash(options={})
call
@hash = { name => @args } unless @hash && @hash[name] && ! @hash[name].empty?
if @aggregations
@hash[:aggregations] = @aggregations.to_hash
end
@hash
end
end
end
end
end
end
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