org.apache.cassandra.io.sstable
Class SSTableIdentityIterator

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

All Implemented Interfaces:

java.io.Closeable, java.lang.Comparable<SSTableIdentityIterator>, java.util.Iterator<OnDiskAtom>, ICountableColumnIterator, OnDiskAtomIterator, CloseableIterator<OnDiskAtom>

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

Field Summary

long	dataSize
IColumnSerializer.Flag	flag

Constructor Summary

SSTableIdentityIterator(CFMetaData metadata, java.io.DataInput file, java.lang.String filename, DecoratedKey key, long dataStart, long dataSize, IColumnSerializer.Flag flag)

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

SSTableIdentityIterator(SSTableReader sstable, RandomAccessReader 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)
int	getColumnCount()
ColumnFamily	getColumnFamily()
ColumnFamily	getColumnFamilyWithColumns(ISortedColumns.Factory containerFactory)
DecoratedKey	getKey()
java.lang.String	getPath()
boolean	hasNext()
OnDiskAtom	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

dataSize

public final long dataSize

flag

public final IColumnSerializer.Flag flag

Constructor Detail

SSTableIdentityIterator

public SSTableIdentityIterator(SSTableReader sstable,
                               RandomAccessReader file,
                               DecoratedKey key,
                               long dataStart,
                               long dataSize)

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,
                               RandomAccessReader file,
                               DecoratedKey key,
                               long dataStart,
                               long dataSize,
                               boolean checkData)

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

SSTableIdentityIterator

public SSTableIdentityIterator(CFMetaData metadata,
                               java.io.DataInput file,
                               java.lang.String filename,
                               DecoratedKey key,
                               long dataStart,
                               long dataSize,
                               IColumnSerializer.Flag flag)

Method Detail

getKey

public DecoratedKey getKey()

Specified by:

getKey in interface OnDiskAtomIterator

Returns:

the current row key

getColumnFamily

public ColumnFamily getColumnFamily()

Specified by:

getColumnFamily in interface OnDiskAtomIterator

Returns:

A ColumnFamily holding metadata for the row being iterated. Do not modify this CF. Whether it is empty or not is implementation-dependent.

hasNext

public boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator<OnDiskAtom>

next

public OnDiskAtom next()

Specified by:

next in interface java.util.Iterator<OnDiskAtom>

remove

public void remove()

Specified by:

remove in interface java.util.Iterator<OnDiskAtom>

close

public void close()

Description copied from interface: OnDiskAtomIterator

clean up any open resources

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface OnDiskAtomIterator

getPath

public java.lang.String getPath()

getColumnFamilyWithColumns

public ColumnFamily getColumnFamilyWithColumns(ISortedColumns.Factory containerFactory)
                                        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()

Specified by:

reset in interface ICountableColumnIterator

getColumnCount

public int getColumnCount()

Specified by:

getColumnCount in interface ICountableColumnIterator