cascading.pipe.assembly
Class Retain
java.lang.Object
cascading.pipe.Pipe
cascading.pipe.SubAssembly
cascading.pipe.assembly.Retain
- All Implemented Interfaces:
- FlowElement, Traceable, Serializable
public class Retain
- extends SubAssembly
Class Retain is a SubAssembly
that will discard all incoming fields except those given on the constructor.
Use this pipe to narrow a stream of tuples, removing unused data.
- See Also:
Discard
,
Serialized Form
Methods inherited from class cascading.pipe.Pipe |
equals, getConfigDef, getHeads, getParent, getStepConfigDef, getTrace, hasConfigDef, hashCode, hasStepConfigDef, id, isEquivalentTo, named, names, outgoingScopeFor, pipes, print, printInternal, resolveIncomingOperationArgumentFields, resolveIncomingOperationPassThroughFields, setParent, toString |
Retain
@ConstructorProperties(value={"previous","retainFields"})
public Retain(Pipe previous,
Fields retainFields)
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