com.graphhopper.storage

Class VLongStorage

java.lang.Object

com.graphhopper.storage.VLongStorage

public class VLongStorage
extends Object

Taken from Lucene DataOutput. VLong's are longs which have variable length depending on the size. When used together with 'delta compression' it is likely that you'll use only 1 byte per value.

Constructor Summary

Constructors

Constructor and Description
VLongStorage()
VLongStorage(byte[] bytes)
VLongStorage(int cap)

Method Summary

Modifier and Type	Method and Description
byte[]	getBytes()
long	getLength()
long	getPosition()
long	readVLong() Reads a long stored in variable-length format.
void	seek(long pos)
void	trimToSize()
void	writeVLong(long i) Writes an long in a variable-length format.

Methods inherited from class java.lang.Object

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

Constructor Detail

VLongStorage

public VLongStorage()

VLongStorage

public VLongStorage(int cap)

VLongStorage

public VLongStorage(byte[] bytes)

Method Detail

seek

public void seek(long pos)

getPosition

public long getPosition()

getLength

public long getLength()

writeVLong

public final void writeVLong(long i)

Writes an long in a variable-length format. Writes between one and nine bytes. Smaller values take fewer bytes. Negative numbers are not supported.

The format is described further in Lucene its DataOutput#writeVInt(int)

See DataInput readVLong of Lucene

readVLong

public long readVLong()

Reads a long stored in variable-length format. Reads between one and nine bytes. Smaller values take fewer bytes. Negative numbers are not supported.

The format is described further in DataOutput writeVInt(int) from Lucene.

trimToSize

public void trimToSize()

getBytes

public byte[] getBytes()