cascading.operation
Class Debug

java.lang.Object
  cascading.operation.BaseOperation
      cascading.operation.Debug

All Implemented Interfaces:

Filter, Operation, Serializable

public class Debug
extends BaseOperation
implements Filter

Class Debug is a Filter that will never remove an item from a stream, but will print the Tuple to either stdout or stderr.

See Also:

Serialized Form

Nested Class Summary

static class

Debug.Output

Field Summary

Fields inherited from class cascading.operation.BaseOperation

fieldDeclaration, numArgs

Fields inherited from interface cascading.operation.Operation

ANY

Constructor Summary

Debug()
Constructor Debug creates a new Debug instance that prints to stderr by default, and does not print the Tuple instance field names.

Debug(boolean printFields)
Constructor Debug creates a new Debug instance that prints to stderr and will print the current Tuple instance field names if printFields is true.

Debug(Debug.Output output)
Constructor Debug creates a new Debug instance that prints to the declared stream and does not print the Tuple field names.

Debug(Debug.Output output, boolean printFields)
Constructor Debug creates a new Debug instance that prints to the declared stream and will print the Tuple instances field names if printFields is true.

Method Summary

boolean

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

Methods inherited from class cascading.operation.BaseOperation

getFieldDeclaration, getNumArgs, printOperationInternal, toString, toStringInternal

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface cascading.operation.Operation

getFieldDeclaration, getNumArgs

Constructor Detail

Debug

public Debug()

Constructor Debug creates a new Debug instance that prints to stderr by default, and does not print the Tuple instance field names.

Debug

public Debug(boolean printFields)

Constructor Debug creates a new Debug instance that prints to stderr and will print the current Tuple instance field names if printFields is true.

Parameters:

printFields - of type boolean

Debug

public Debug(Debug.Output output)

Constructor Debug creates a new Debug instance that prints to the declared stream and does not print the Tuple field names.

Parameters:

output - of type Output

Debug

public Debug(Debug.Output output,
             boolean printFields)

Constructor Debug creates a new Debug instance that prints to the declared stream and will print the Tuple instances field names if printFields is true.

Parameters:

output - of type Output

Method Detail

isRemove

public boolean isRemove(TupleEntry input)

Description copied from interface: Filter

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

Specified by:

isRemove in interface Filter

Parameters:

input - of type TupleEntry

Returns:

boolean

See Also:

Filter.isRemove(TupleEntry)