cascading.operation
Interface Filter<C>

All Superinterfaces:

Operation<C>

All Known Implementing Classes:

And, Debug, ExpressionFilter, FilterNotNull, FilterNull, Limit, Logic, Not, Or, RegexFilter, Sample, Xor, XPathFilter

public interface Filter<C>
extends Operation<C>

Interface Filter marks a given Operation as a filter, as opposed to being a Function.

It is important that all filters call super(Fields.ALL); in their constructors.

Field Summary

Fields inherited from interface cascading.operation.Operation

ANY

Method Summary

boolean

isRemove(FlowProcess flowProcess, FilterCall<C> filterCall) Method isRemove returns true if input should be removed from the tuple stream.

Methods inherited from interface cascading.operation.Operation

cleanup, getFieldDeclaration, getNumArgs, prepare

Method Detail

isRemove

boolean isRemove(FlowProcess flowProcess,
                 FilterCall<C> filterCall)

Method isRemove returns true if input should be removed from the tuple stream.

Parameters:

flowProcess - of type FlowProcess

filterCall - of type FilterCall

Returns:

boolean