com.stratio.deep.entity

Class Cells

java.lang.Object

com.stratio.deep.entity.Cells

All Implemented Interfaces:

Serializable, Iterable<Cell>

public class Cells
extends Object
implements Iterable<Cell>, Serializable

Represents a tuple inside the Cassandra's datastore. A Cells object basically is an ordered collection of Cell objects, plus a few utility methods to access specific cells in the row.

Author:

Luca Rosellini

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Cells() Default constructor.
Cells(Cell... cells) Builds a new Cells object containing the provided cells.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	add(Cell c) Adds a new Cell object to this Cells instance.
boolean	equals(Object obj)
Cell	getCellByIdx(int idx) Returns the cell at position idx.
Cell	getCellByName(String cellName) Returns the Cell whose name is cellName, or null if this Cells object contains no cell whose name is cellName.
Collection<Cell>	getCells()
Collection<Object>	getCellValues() Converts every Cell contained in this object to an ArrayBuffer.
Collection<ByteBuffer>	getDecomposedCellValues() Converts every Cell contained in this object to an ArrayBuffer.
Cells	getIndexCells() Extracts from this Cells object the cells marked either as partition key or cluster key.
Cells	getValueCells() Extracts from this Cells object the cells _NOT_ marked as partition key and _NOT_ marked as cluster key.
int	hashCode()
boolean	isEmpty()
Iterator<Cell>	iterator()
boolean	remove(String cellName) Removes the cell with the given cell name.
boolean	replaceByName(Cell c) Replaces the cell having the same name that the given one with the given Cell object.
int	size() Returns the number of cell(s) this object contains.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Cells

public Cells()

Default constructor.

Cells

public Cells(Cell... cells)

Builds a new Cells object containing the provided cells.

Parameters:

cells - the array of Cells we want to use to create the Cells object.

Method Detail

add

public boolean add(Cell c)

Adds a new Cell object to this Cells instance.

Parameters:

c - the Cell we want to add to this Cells object.

Returns:

either true/false if the Cell has been added successfully or not.

replaceByName

public boolean replaceByName(Cell c)

Replaces the cell having the same name that the given one with the given Cell object.

Parameters:

c - the Cell to replace the one in the Cells object.

Returns:

either true/false if the Cell has been successfully replace or not.

remove

public boolean remove(String cellName)

Removes the cell with the given cell name.

Parameters:

cellName - the name of the cell to be removed.

Returns:

either true/false if the Cell has been successfully removed or not.

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

getCellByIdx

public Cell getCellByIdx(int idx)

Returns the cell at position idx.

Parameters:

idx - the index position of the Cell we want to retrieve.

Returns:

Returns the cell at position idx.

getCellByName

public Cell getCellByName(String cellName)

Returns the Cell whose name is cellName, or null if this Cells object contains no cell whose name is cellName.

Parameters:

cellName - the name of the Cell we want to retrieve from this Cells object.

Returns:

the Cell whose name is cellName contained in this Cells object. null if no cell named cellName is present.

getCells

public Collection<Cell> getCells()

Returns:

Returns an immutable collection of Cell objects contained in this Cells.

getDecomposedCellValues

public Collection<ByteBuffer> getDecomposedCellValues()

Converts every Cell contained in this object to an ArrayBuffer. In order to perform the conversion we use the appropriate Cassandra marshaller for the Cell.

Returns:

a collection of Cell(s) values converted to byte buffers using the appropriate marshaller.

getCellValues

public Collection<Object> getCellValues()

Converts every Cell contained in this object to an ArrayBuffer. In order to perform the conversion we use the appropriate Cassandra marshaller for the Cell.

Returns:

a collection of Cell(s) values.

getIndexCells

public Cells getIndexCells()

Extracts from this Cells object the cells marked either as partition key or cluster key. Returns an empty Cells object if the current object does not contain any Cell marked as key.

Returns:

the Cells object containing the subset of this Cells object of only the Cell(s) part of the key.

getValueCells

public Cells getValueCells()

Extracts from this Cells object the cells _NOT_ marked as partition key and _NOT_ marked as cluster key.

Returns:

the Cells object containing the subset of this Cells object of only the Cell(s) that are NOT part of the key.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

iterator

public Iterator<Cell> iterator()

Specified by:

iterator in interface Iterable<Cell>

size

public int size()

Returns the number of cell(s) this object contains.

Returns:

the number os Cell objects contained in this Cells object.

isEmpty

public boolean isEmpty()

Returns:

true if this object contains no cells.

toString

public String toString()

Overrides:

toString in class Object