Sha256: 95f40aee0e9e60011413e2fcdcc1e34fdfd165c6b2be79f486983d1beca5dd0e
Contents?: true
Size: 987 Bytes
Versions: 37
Compression:
Stored size: 987 Bytes
Contents
require 'arc-furnace/node'
module ArcFurnace
class Source < Node
extend Forwardable
# Called to prepare anything this source needs to do before providing rows.
# For instance, opening a source file or database connection.
def prepare
end
# Advance this source by one, returning the row as a hash
def row
result = value
advance
result
end
# Called at the end of processing, do any clean-up or state-saving here.
def finalize
end
# Is this source empty?
def empty?
raise 'Unimplemented'
end
# The current value this source points at
# This is generally the only method required to implement a source.
def value
raise 'Unimplemented'
end
# Close the source. Called by the framework at the end of processing.
def close
end
# Advance this source by one. #advance specifies no return value contract
def advance
raise 'Unimplemented'
end
end
end
Version data entries
37 entries across 37 versions & 1 rubygems