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## cascading.operation
Class NoOp

    java.lang.Object
      cascading.operation.BaseOperation
          cascading.operation.NoOp

All Implemented Interfaces:
  Function, Operation, Serializable

    public class NoOp

extends BaseOperation
implements Function

Class NoOp does nothing. It ignores all arguments and returns an empty `Tuple`, `Tuple.NULL`.

Use with `Fields.SWAP` to retain unknown fields, or use the `Discard` sub-assembly.

See Also:
  `Insert`, `Discard`, Serialized Form

Field Summary

Fields inherited from class cascading.operation.BaseOperation
`fieldDeclaration, numArgs, trace`

Fields inherited from interface cascading.operation.Operation
`ANY`

Constructor Summary
`NoOp()` Constructor NoOp creates a new NoOp instance that will ignore the argument values and return no output.

Method Summary
`void` | `operate(FlowProcess flowProcess, FunctionCall functionCall)` Method operate provides the implementation of this Function.

Methods inherited from class cascading.operation.BaseOperation
`cleanup, equals, flush, getFieldDeclaration, getNumArgs, getTrace, hashCode, isSafe, prepare, printOperationInternal, toString, toStringInternal`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

Methods inherited from interface cascading.operation.Operation
`cleanup, flush, getFieldDeclaration, getNumArgs, isSafe, prepare`

Constructor Detail

### NoOp

    public NoOp()

  Constructor NoOp creates a new NoOp instance that will ignore the argument values and return no output.

Method Detail

### operate

    public void operate(FlowProcess flowProcess,
                        FunctionCall functionCall)

  Description copied from interface: `Function`
  Method operate provides the implementation of this Function.

  Specified by:
    `operate` in interface `Function`
  Parameters:
    `flowProcess` - of type FlowProcess
    `functionCall` - of type FunctionCall

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