cascading.operation.text

Class FieldJoiner

java.lang.Object

cascading.operation.BaseOperation<Tuple>

cascading.operation.text.FieldJoiner

All Implemented Interfaces:

DeclaresResults, Function<Tuple>, Operation<Tuple>, Traceable, java.io.Serializable

public class FieldJoiner
extends BaseOperation<Tuple>
implements Function<Tuple>

Class FieldJoiner joins the values in a Tuple with a given delimiter and stuffs the result into a new field.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	FIELD_NAME Field FIELD_NAME

Fields inherited from class cascading.operation.BaseOperation

fieldDeclaration, numArgs, trace

Fields inherited from interface cascading.operation.Operation

ANY

Constructor Summary

Constructors

Constructor and Description
FieldJoiner(Fields fieldDeclaration) Constructor FieldJoiner creates a new FieldJoiner instance.
FieldJoiner(Fields fieldDeclaration, java.lang.String delimiter) Constructor FieldJoiner creates a new FieldJoiner instance.
FieldJoiner(java.lang.String delimiter) Constructor FieldJoiner creates a new FieldJoiner instance.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object object)
java.lang.String	getDelimiter() Method getFormat returns the delimiter of this FieldJoiner object.
int	hashCode()
void	operate(FlowProcess flowProcess, FunctionCall<Tuple> functionCall) Method operate provides the implementation of this Function.
void	prepare(FlowProcess flowProcess, OperationCall<Tuple> operationCall) Method prepare does nothing, and may safely be overridden.

Methods inherited from class cascading.operation.BaseOperation

cleanup, flush, getFieldDeclaration, getNumArgs, getTrace, isSafe, 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

Field Detail

FIELD_NAME

public static final java.lang.String FIELD_NAME

Field FIELD_NAME

See Also:

Constant Field Values

Constructor Detail

FieldJoiner

@ConstructorProperties(value="delimiter")
public FieldJoiner(java.lang.String delimiter)

Constructor FieldJoiner creates a new FieldJoiner instance.

Parameters:

delimiter - of type String

FieldJoiner

@ConstructorProperties(value="fieldDeclaration")
public FieldJoiner(Fields fieldDeclaration)

Constructor FieldJoiner creates a new FieldJoiner instance.

Parameters:

fieldDeclaration - of type Fields

FieldJoiner

@ConstructorProperties(value={"fieldDeclaration","delimiter"})
public FieldJoiner(Fields fieldDeclaration,
                                                                                  java.lang.String delimiter)

Constructor FieldJoiner creates a new FieldJoiner instance.

Parameters:

fieldDeclaration - of type Fields

delimiter - of type String

Method Detail

getDelimiter

public java.lang.String getDelimiter()

Method getFormat returns the delimiter of this FieldJoiner object.

Returns:

the delimiter (type String) of this FieldJoiner object.

prepare

public void prepare(FlowProcess flowProcess,
                    OperationCall<Tuple> operationCall)

Description copied from class: BaseOperation

Method prepare does nothing, and may safely be overridden.

Specified by:

prepare in interface Operation<Tuple>

Overrides:

prepare in class BaseOperation<Tuple>

operate

public void operate(FlowProcess flowProcess,
                    FunctionCall<Tuple> functionCall)

Description copied from interface: Function

Method operate provides the implementation of this Function.

Specified by:

operate in interface Function<Tuple>

Parameters:

flowProcess - of type FlowProcess

functionCall - of type FunctionCall

equals

public boolean equals(java.lang.Object object)

Overrides:

equals in class BaseOperation<Tuple>

hashCode

public int hashCode()

Overrides:

hashCode in class BaseOperation<Tuple>