Package org.iq80.leveldb.table

Class Table

java.lang.Object

org.iq80.leveldb.table.Table

All Implemented Interfaces:

Iterable<Map.Entry<Slice,Slice>>, SeekingIterable<Slice,Slice>

Direct Known Subclasses:

FileChannelTable, MMapTable

public abstract class Table
extends Object
implements SeekingIterable<Slice,Slice>

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	Table.Closer

Field Summary

Fields

Modifier and Type	Field	Description
protected final Comparator<Slice>	comparator
protected final FileChannel	fileChannel
protected final Block	indexBlock
protected final BlockHandle	metaindexBlockHandle
protected final String	name
protected static ByteBuffer	uncompressedScratch
protected final boolean	verifyChecksums

Constructor Summary

Constructors

Constructor	Description
Table(String name, FileChannel fileChannel, Comparator<Slice> comparator, boolean verifyChecksums)

Method Summary

Modifier and Type	Method	Description
Callable<?>	closer()
long	getApproximateOffsetOf(Slice key)	Given a key, return an approximate byte offset in the file where the data for that key begins (or would begin if the key were present in the file).
protected abstract Footer	init()
TableIterator	iterator()
Block	openBlock(Slice blockEntry)
protected abstract Block	readBlock(BlockHandle blockHandle)
String	toString()
protected int	uncompressedLength(ByteBuffer data)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Details

name

protected final String name

fileChannel

protected final FileChannel fileChannel

comparator

protected final Comparator<Slice> comparator

verifyChecksums

protected final boolean verifyChecksums

indexBlock

protected final Block indexBlock

metaindexBlockHandle

protected final BlockHandle metaindexBlockHandle

uncompressedScratch

protected static ByteBuffer uncompressedScratch

Constructor Details

Table

public Table(String name,
 FileChannel fileChannel,
 Comparator<Slice> comparator,
 boolean verifyChecksums)
      throws IOException

Throws:

IOException

Method Details

init

protected abstract Footer init()
                        throws IOException

Throws:

IOException

iterator

public TableIterator iterator()

Specified by:

iterator in interface Iterable<Map.Entry<Slice,Slice>>

Specified by:

iterator in interface SeekingIterable<Slice,Slice>

openBlock

public Block openBlock(Slice blockEntry)

readBlock

protected abstract Block readBlock(BlockHandle blockHandle)
                            throws IOException

Throws:

IOException

uncompressedLength

protected int uncompressedLength(ByteBuffer data)
                          throws IOException

Throws:

IOException

getApproximateOffsetOf

public long getApproximateOffsetOf(Slice key)

Given a key, return an approximate byte offset in the file where the data for that key begins (or would begin if the key were present in the file). The returned value is in terms of file bytes, and so includes effects like compression of the underlying data. For example, the approximate offset of the last key in the table will be close to the file length.

toString

public String toString()

Overrides:

toString in class Object

closer

public Callable<?> closer()