org.apache.cassandra.db
Interface ISortedColumns

All Superinterfaces:

IIterableColumns, java.lang.Iterable<IColumn>

All Known Implementing Classes:

ArrayBackedSortedColumns, ThreadSafeSortedColumns, TreeMapBackedSortedColumns

public interface ISortedColumns
extends IIterableColumns

A sorted map of columns. This represents the backing map of a colum family. Whether the implementation is thread safe or not is left to the implementing classes.

Nested Class Summary

static interface

ISortedColumns.Factory

Method Summary

void	addAll(ISortedColumns cm, Allocator allocator) Adds all the columns of a given column map to this column map.
void	addColumn(IColumn column, Allocator allocator) Adds a column to this column map.
void	clear() Clear this column map, removing all columns.
ISortedColumns	cloneMe() Shallow cloning of the column map.
IColumn	getColumn(java.nio.ByteBuffer name) Get a column given its name, returning null if the column is not present.
java.util.SortedSet<java.nio.ByteBuffer>	getColumnNames() Returns a set with the names of columns in this column map.
ISortedColumns.Factory	getFactory() Returns the factory used for this ISortedColumns implementation.
java.util.Collection<IColumn>	getReverseSortedColumns() Returns the columns of this column map as a collection.
java.util.Collection<IColumn>	getSortedColumns() Returns the columns of this column map as a collection.
boolean	isEmpty() Returns true if this map is empty, false otherwise.
boolean	isInsertReversed() Returns if this map only support inserts in reverse order.
void	removeColumn(java.nio.ByteBuffer name) Remove if present a column by name.
boolean	replace(IColumn oldColumn, IColumn newColumn) Replace oldColumn if present by newColumn.
java.util.Iterator<IColumn>	reverseIterator() Returns an iterator that iterates over the columns of this map in reverse order.
int	size() Returns the number of columns in this map.

Methods inherited from interface org.apache.cassandra.io.util.IIterableColumns

getComparator, getEstimatedColumnCount

Methods inherited from interface java.lang.Iterable

iterator

Method Detail

cloneMe

ISortedColumns cloneMe()

Shallow cloning of the column map.

getFactory

ISortedColumns.Factory getFactory()

Returns the factory used for this ISortedColumns implementation.

addColumn

void addColumn(IColumn column,
               Allocator allocator)

Adds a column to this column map. If a column with the same name is already present in the map, it will be replaced by the newly added column.

addAll

void addAll(ISortedColumns cm,
            Allocator allocator)

Adds all the columns of a given column map to this column map. This is equivalent to: for (Column c : cm) add(c); but is potentially faster.

replace

boolean replace(IColumn oldColumn,
                IColumn newColumn)

Replace oldColumn if present by newColumn. Returns true if oldColumn was present and thus replaced. oldColumn and newColumn should have the same name.

removeColumn

void removeColumn(java.nio.ByteBuffer name)

Remove if present a column by name.

clear

void clear()

Clear this column map, removing all columns.

getColumn

IColumn getColumn(java.nio.ByteBuffer name)

Get a column given its name, returning null if the column is not present.

getColumnNames

java.util.SortedSet<java.nio.ByteBuffer> getColumnNames()

Returns a set with the names of columns in this column map. The resulting set is sorted and the order is the one of the columns in this column map.

getSortedColumns

java.util.Collection<IColumn> getSortedColumns()

Returns the columns of this column map as a collection. The columns in the returned collection should be sorted as the columns in this map.

getReverseSortedColumns

java.util.Collection<IColumn> getReverseSortedColumns()

Returns the columns of this column map as a collection. The columns in the returned collection should be sorted in reverse order of the columns in this map.

size

int size()

Returns the number of columns in this map.

isEmpty

boolean isEmpty()

Returns true if this map is empty, false otherwise.

reverseIterator

java.util.Iterator<IColumn> reverseIterator()

Returns an iterator that iterates over the columns of this map in reverse order.

isInsertReversed

boolean isInsertReversed()

Returns if this map only support inserts in reverse order.