36 lines
946 B
Ruby
36 lines
946 B
Ruby
module Polecat
|
|
# The Query manages a number of terms or queries which are set into a
|
|
# relation. A relation is needed to say, which documents shall be
|
|
# returned.
|
|
# In a @and@ relation only the documents, which are returned of the query
|
|
# parts get returned. For @or@ all documents found in a part get returned.
|
|
class Query
|
|
# returns the relation of the terms
|
|
# @return [Symbol] :and, :or
|
|
attr_accessor :relation
|
|
|
|
# returns the list of all terms
|
|
attr_reader :terms
|
|
|
|
# creates a new query object
|
|
#
|
|
# Create a new query object. As a default, the relation is set to @:and@
|
|
# (@see Query#relation)
|
|
def initialize relation = :and
|
|
if relation == :and || relation == :or
|
|
@relation = relation
|
|
else
|
|
raise ArgumentError, 'no valid relation'
|
|
end
|
|
|
|
@terms = []
|
|
end
|
|
|
|
# add a new term or query
|
|
def add term
|
|
@terms << term
|
|
self
|
|
end
|
|
end
|
|
end
|