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Contents
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF 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 Arrow
class Expression
class << self
# @api private
def try_convert(value)
case value
when Symbol
FieldExpression.new(value.to_s)
when ::Array
function_name, *arguments = value
case function_name
when String, Symbol
function_name = function_name.to_s
else
return nil
end
options = nil
if arguments.last.is_a?(FunctionOptions)
options = arguments.pop
elsif arguments.last.is_a?(Hash)
function = Function.find(function_name)
if function
options = function.resolve_options(arguments.pop)
end
end
CallExpression.new(function_name, arguments, options)
else
datum = Datum.try_convert(value)
return nil if datum.nil?
LiteralExpression.new(datum)
end
end
end
end
end
Version data entries
11 entries across 11 versions & 1 rubygems