org.apache.cassandra.io.sstable
Class SSTableIdentityIterator

java.lang.Object
  org.apache.cassandra.io.sstable.SSTableIdentityIterator

All Implemented Interfaces:

java.lang.Comparable<SSTableIdentityIterator>, java.util.Iterator<IColumn>, IColumnIterator

public class SSTableIdentityIterator
extends java.lang.Object
implements java.lang.Comparable<SSTableIdentityIterator>, IColumnIterator

Field Summary

int	columnCount
long	dataSize
SSTableReader	sstable

Constructor Summary

SSTableIdentityIterator(SSTableReader sstable, BufferedRandomAccessFile file, DecoratedKey key, long dataStart, long dataSize)
Used to iterate through the columns of a row.

SSTableIdentityIterator(SSTableReader sstable, BufferedRandomAccessFile file, DecoratedKey key, long dataStart, long dataSize, boolean checkData)
Used to iterate through the columns of a row.

Method Summary

void	close() clean up any open resources
int	compareTo(SSTableIdentityIterator o)
void	echoData(java.io.DataOutput out)
ColumnFamily	getColumnFamily() returns the CF of the column being iterated.
ColumnFamily	getColumnFamilyWithColumns()
DecoratedKey	getKey()
java.lang.String	getPath()
boolean	hasNext()
IColumn	next()
void	remove()
void	reset()

Methods inherited from class java.lang.Object

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

Field Detail

sstable

public final SSTableReader sstable

dataSize

public final long dataSize

columnCount

public final int columnCount

Constructor Detail

SSTableIdentityIterator

public SSTableIdentityIterator(SSTableReader sstable,
                               BufferedRandomAccessFile file,
                               DecoratedKey key,
                               long dataStart,
                               long dataSize)
                        throws java.io.IOException

Used to iterate through the columns of a row.

Parameters:

sstable - SSTable we are reading ffrom.

file - Reading using this file.

key - Key of this row.

dataStart - Data for this row starts at this pos.

dataSize - length of row data

Throws:

java.io.IOException

SSTableIdentityIterator

public SSTableIdentityIterator(SSTableReader sstable,
                               BufferedRandomAccessFile file,
                               DecoratedKey key,
                               long dataStart,
                               long dataSize,
                               boolean checkData)
                        throws java.io.IOException

Used to iterate through the columns of a row.

Parameters:

sstable - SSTable we are reading ffrom.

file - Reading using this file.

key - Key of this row.

dataStart - Data for this row starts at this pos.

dataSize - length of row data

checkData - if true, do its best to deserialize and check the coherence of row data

Throws:

java.io.IOException

Method Detail

getKey

public DecoratedKey getKey()

Specified by:

getKey in interface IColumnIterator

Returns:

the current row key

getColumnFamily

public ColumnFamily getColumnFamily()

Description copied from interface: IColumnIterator

returns the CF of the column being iterated. Do not modify the returned CF; clone first. This is guaranteed to be non-null and that the returned CF have the correct metadata (markedForDeleteAt and localDeletionTime). The full CF is however only guaranteed to be available after a call to next() or hasNext().

Specified by:

getColumnFamily in interface IColumnIterator

hasNext

public boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator<IColumn>

next

public IColumn next()

Specified by:

next in interface java.util.Iterator<IColumn>

remove

public void remove()

Specified by:

remove in interface java.util.Iterator<IColumn>

close

public void close()
           throws java.io.IOException

Description copied from interface: IColumnIterator

clean up any open resources

Specified by:

close in interface IColumnIterator

Throws:

java.io.IOException

getPath

public java.lang.String getPath()

echoData

public void echoData(java.io.DataOutput out)
              throws java.io.IOException

Throws:

java.io.IOException

getColumnFamilyWithColumns

public ColumnFamily getColumnFamilyWithColumns()
                                        throws java.io.IOException

Throws:

java.io.IOException

compareTo

public int compareTo(SSTableIdentityIterator o)

Specified by:

compareTo in interface java.lang.Comparable<SSTableIdentityIterator>

reset

public void reset()