cascading.flow
Class Scope

java.lang.Object
  cascading.flow.Scope

All Implemented Interfaces:

Serializable

public class Scope
extends Object
implements Serializable

Class Scope is an internal representation of the linkages between operations.

See Also:

Serialized Form

Nested Class Summary

static class

Scope.Kind Enum Kind

Constructor Summary

Scope()
Default constructor.

Scope(Fields outFields)
Tap constructor

Scope(Scope scope)
Copy constructor

Scope(String name)
Constructor Scope creates a new Scope instance.

Scope(String name, Fields declaredFields, Fields outGroupingFields, Map<String,Fields> groupingSelectors, Map<String,Fields> sortingSelectors, Fields outValuesFields, boolean isGroupBy)
Constructor Scope creates a new Scope instance.

Scope(String name, Scope.Kind kind, Fields remainderFields, Fields argumentFields, Fields declaredFields, Fields outGroupingFields, Fields outValuesFields)
Constructor Scope creates a new Scope instance.

Method Summary

void	copyFields(Scope scope) Method copyFields copies the given Scope instance fields to this instance.
Fields	getArgumentFields() Method getArgumentSelector returns the argumentSelector of this Scope object.
Fields	getArguments() Method getArguments returns the arguments of this Scope object.
TupleEntry	getArgumentsEntry() Method getArgumentsEntry returns the argumentsEntry of this Scope object.
TupleEntry	getArgumentsEntry(TupleEntry input) Method getArgumentsEntry returns a cached TupleEntry for the declared arguments of this scope.
TupleEntry	getDeclaredEntry() Method getDeclaredEntry returns the declaredEntry of this Scope object.
Fields	getDeclaredFields() Method getDeclaredFields returns the declaredFields of this Scope object.
Map<String,Fields>	getGroupingSelectors() Method getGroupingSelectors returns the groupingSelectors of this Scope object.
String	getName() Method getName returns the name of this Scope object.
Fields	getOutGroupingFields() Method getOutGroupingFields returns the outGroupingFields of this Scope object.
Fields	getOutGroupingSelector() Method getOutGroupingSelector returns the outGroupingSelector of this Scope object.
Fields	getOutValuesFields() Method getOutValuesFields returns the outValuesFields of this Scope object.
Fields	getOutValuesSelector() Method getOutValuesSelector returns the outValuesSelector of this Scope object.
Fields	getRemainderFields() Method getRemainderFields returns the remainderFields of this Scope object.
Map<String,Fields>	getSortingSelectors() Method getSortingSelectors returns the sortingSelectors of this Scope object.
boolean	isEach() Method isEach returns true if this Scope object represents an Each.
boolean	isEvery() Method isEvery returns true if this Scope object represents an Every.
boolean	isGroup() Method isGroup returns true if this Scope object represents a Group.
boolean	isTap() Method isTap returns true if this Scope object represents a Tap.
void	setName(String name) Method setName sets the name of this Scope object.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

Scope

public Scope()

Default constructor.

Scope

public Scope(Scope scope)

Copy constructor

Parameters:

scope - of type Scope

Scope

public Scope(Fields outFields)

Tap constructor

Parameters:

outFields - of type Fields

Scope

public Scope(String name,
             Scope.Kind kind,
             Fields remainderFields,
             Fields argumentFields,
             Fields declaredFields,
             Fields outGroupingFields,
             Fields outValuesFields)

Constructor Scope creates a new Scope instance. Used by classes Each and Every.

Parameters:

name - of type String

kind - of type Kind

remainderFields - of type Fields

argumentFields - of type Fields

declaredFields - of type Fields

outGroupingFields - of type Fields

outValuesFields - of type Fields

Scope

public Scope(String name,
             Fields declaredFields,
             Fields outGroupingFields,
             Map<String,Fields> groupingSelectors,
             Map<String,Fields> sortingSelectors,
             Fields outValuesFields,
             boolean isGroupBy)

Constructor Scope creates a new Scope instance. Used by the Group class.

Parameters:

name - of type String

declaredFields - of type Fields

outGroupingFields - of type Fields

groupingSelectors - of type Map

sortingSelectors - of type Fields

outValuesFields - of type Fields

isGroupBy - of type boolean

Scope

public Scope(String name)

Constructor Scope creates a new Scope instance.

Parameters:

name - of type String

Method Detail

isGroup

public boolean isGroup()

Method isGroup returns true if this Scope object represents a Group.

Returns:

the group (type boolean) of this Scope object.

isEach

public boolean isEach()

Method isEach returns true if this Scope object represents an Each.

Returns:

the each (type boolean) of this Scope object.

isEvery

public boolean isEvery()

Method isEvery returns true if this Scope object represents an Every.

Returns:

the every (type boolean) of this Scope object.

isTap

public boolean isTap()

Method isTap returns true if this Scope object represents a Tap.

Returns:

the tap (type boolean) of this Scope object.

getName

public String getName()

Method getName returns the name of this Scope object.

Returns:

the name (type String) of this Scope object.

setName

public void setName(String name)

Method setName sets the name of this Scope object.

Parameters:

name - the name of this Scope object.

getRemainderFields

public Fields getRemainderFields()

Method getRemainderFields returns the remainderFields of this Scope object.

Returns:

the remainderFields (type Fields) of this Scope object.

getArgumentFields

public Fields getArgumentFields()

Method getArgumentSelector returns the argumentSelector of this Scope object.

Returns:

the argumentSelector (type Fields) of this Scope object.

getArguments

public Fields getArguments()

Method getArguments returns the arguments of this Scope object.

Returns:

the arguments (type Fields) of this Scope object.

getArgumentsEntry

public TupleEntry getArgumentsEntry()

Method getArgumentsEntry returns the argumentsEntry of this Scope object.

Returns:

the argumentsEntry (type TupleEntry) of this Scope object.

getArgumentsEntry

public TupleEntry getArgumentsEntry(TupleEntry input)

Method getArgumentsEntry returns a cached TupleEntry for the declared arguments of this scope.

Parameters:

input - of type TupleEntry

Returns:

TupleEntry

getDeclaredFields

public Fields getDeclaredFields()

Method getDeclaredFields returns the declaredFields of this Scope object.

Returns:

the declaredFields (type Fields) of this Scope object.

getDeclaredEntry

public TupleEntry getDeclaredEntry()

Method getDeclaredEntry returns the declaredEntry of this Scope object.

Returns:

the declaredEntry (type TupleEntry) of this Scope object.

getGroupingSelectors

public Map<String,Fields> getGroupingSelectors()

Method getGroupingSelectors returns the groupingSelectors of this Scope object.

Returns:

the groupingSelectors (type Map) of this Scope object.

getSortingSelectors

public Map<String,Fields> getSortingSelectors()

Method getSortingSelectors returns the sortingSelectors of this Scope object.

Returns:

the sortingSelectors (type Map) of this Scope object.

getOutGroupingSelector

public Fields getOutGroupingSelector()

Method getOutGroupingSelector returns the outGroupingSelector of this Scope object.

Returns:

the outGroupingSelector (type Fields) of this Scope object.

getOutGroupingFields

public Fields getOutGroupingFields()

Method getOutGroupingFields returns the outGroupingFields of this Scope object.

Returns:

the outGroupingFields (type Fields) of this Scope object.

getOutValuesSelector

public Fields getOutValuesSelector()

Method getOutValuesSelector returns the outValuesSelector of this Scope object.

Returns:

the outValuesSelector (type Fields) of this Scope object.

getOutValuesFields

public Fields getOutValuesFields()

Method getOutValuesFields returns the outValuesFields of this Scope object.

Returns:

the outValuesFields (type Fields) of this Scope object.

copyFields

public void copyFields(Scope scope)

Method copyFields copies the given Scope instance fields to this instance.

Parameters:

scope - of type Scope

toString

public String toString()

Overrides:

toString in class Object