cascading.operation.regex
Class RegexSplitter

java.lang.Object
  extended by cascading.operation.BaseOperation<C>
      extended by cascading.operation.regex.RegexOperation<Pair<Pattern,Tuple>>
          extended by cascading.operation.regex.RegexSplitter
All Implemented Interfaces:
DeclaresResults, Function<Pair<Pattern,Tuple>>, Operation<Pair<Pattern,Tuple>>, Traceable, Serializable

public class RegexSplitter
extends RegexOperation<Pair<Pattern,Tuple>>
implements Function<Pair<Pattern,Tuple>>

Class RegexSplitter will split an incoming argument value by the given regex delimiter patternString.

RegexSplitter only expects one field value. If more than one argument value is passed, only the first is handled, the remainder are ignored.

Note a null valued argument passed to the parser will be converted to an empty string ("") before the regex is applied.

Any Object value will be coerced to a String type if type information is provided. See the CoercibleType interface to control how custom Object types are converted to String values.

See Also:
Serialized Form

Field Summary
 
Fields inherited from class cascading.operation.regex.RegexOperation
patternString
 
Fields inherited from class cascading.operation.BaseOperation
fieldDeclaration, numArgs, trace
 
Fields inherited from interface cascading.operation.Operation
ANY
 
Constructor Summary
RegexSplitter(Fields fieldDeclaration)
          Constructor RegexOperation creates a new RegexOperation instance, where the delimiter is the tab character.
RegexSplitter(Fields fieldDeclaration, String patternString)
          Constructor RegexSplitter creates a new RegexSplitter instance.
RegexSplitter(String patternString)
          Constructor RegexSplitter creates a new RegexSplitter instance.
 
Method Summary
 void operate(FlowProcess flowProcess, FunctionCall<Pair<Pattern,Tuple>> functionCall)
          Method operate provides the implementation of this Function.
 void prepare(FlowProcess flowProcess, OperationCall<Pair<Pattern,Tuple>> operationCall)
          Method prepare does nothing, and may safely be overridden.
 
Methods inherited from class cascading.operation.regex.RegexOperation
equals, getPattern, getPatternString, hashCode
 
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
 

Constructor Detail

RegexSplitter

@ConstructorProperties(value="patternString")
public RegexSplitter(String patternString)
Constructor RegexSplitter creates a new RegexSplitter instance.

Parameters:
patternString - of type String

RegexSplitter

@ConstructorProperties(value="fieldDeclaration")
public RegexSplitter(Fields fieldDeclaration)
Constructor RegexOperation creates a new RegexOperation instance, where the delimiter is the tab character.

Parameters:
fieldDeclaration - of type Fields

RegexSplitter

@ConstructorProperties(value={"fieldDeclaration","patternString"})
public RegexSplitter(Fields fieldDeclaration,
                                                String patternString)
Constructor RegexSplitter creates a new RegexSplitter instance.

Parameters:
fieldDeclaration - of type Fields
patternString - of type String
Method Detail

prepare

public void prepare(FlowProcess flowProcess,
                    OperationCall<Pair<Pattern,Tuple>> operationCall)
Description copied from class: BaseOperation
Method prepare does nothing, and may safely be overridden.

Specified by:
prepare in interface Operation<Pair<Pattern,Tuple>>
Overrides:
prepare in class BaseOperation<Pair<Pattern,Tuple>>

operate

public void operate(FlowProcess flowProcess,
                    FunctionCall<Pair<Pattern,Tuple>> functionCall)
Description copied from interface: Function
Method operate provides the implementation of this Function.

Specified by:
operate in interface Function<Pair<Pattern,Tuple>>
Parameters:
flowProcess - of type FlowProcess
functionCall - of type FunctionCall


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