Package org.apache.lucene.store

Class ByteArrayDataInput

java.lang.Object

org.apache.lucene.store.DataInput

org.apache.lucene.store.ByteArrayDataInput

All Implemented Interfaces:

Cloneable

public final class ByteArrayDataInput
extends DataInput

DataInput backed by a byte array. WARNING: This class omits all low-level checks.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Constructor Summary

Constructors

Constructor	Description
ByteArrayDataInput()
ByteArrayDataInput(byte[] bytes)
ByteArrayDataInput(byte[] bytes, int offset, int len)

Method Summary

Modifier and Type	Method	Description
boolean	eof()
int	getPosition()
int	length()
byte	readByte()	Reads and returns a single byte.
void	readBytes(byte[] b, int offset, int len)	Reads a specified number of bytes into an array at the specified offset.
int	readInt()	Reads four bytes and returns an int (LE byte order).
long	readLong()	Reads eight bytes and returns a long (LE byte order).
short	readShort()	Reads two bytes and returns a short (LE byte order).
int	readVInt()	Reads an int stored in variable-length format.
long	readVLong()	Reads a long stored in variable-length format.
void	reset(byte[] bytes)
void	reset(byte[] bytes, int offset, int len)
void	rewind()
void	setPosition(int pos)
void	skipBytes(long count)	Skip over numBytes bytes.

Methods inherited from class org.apache.lucene.store.DataInput

clone, readBytes, readFloats, readLongs, readMapOfStrings, readSetOfStrings, readString, readZInt, readZLong

Methods inherited from class java.lang.Object

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

Constructor Details

ByteArrayDataInput

public ByteArrayDataInput(byte[] bytes)

ByteArrayDataInput

public ByteArrayDataInput(byte[] bytes,
 int offset,
 int len)

ByteArrayDataInput

public ByteArrayDataInput()

Method Details

reset

public void reset(byte[] bytes)

rewind

public void rewind()

getPosition

public int getPosition()

setPosition

public void setPosition(int pos)

reset

public void reset(byte[] bytes,
 int offset,
 int len)

length

public int length()

eof

public boolean eof()

skipBytes

public void skipBytes(long count)

Description copied from class: DataInput

Skip over numBytes bytes. This method may skip bytes in whatever way is most optimal, and may not have the same behavior as reading the skipped bytes. In general, negative numBytes are not supported.

Specified by:

skipBytes in class DataInput

readShort

public short readShort()

Description copied from class: DataInput

Reads two bytes and returns a short (LE byte order).

Overrides:

readShort in class DataInput

See Also:

• DataOutput.writeShort(short)
• BitUtil.VH_LE_SHORT

readInt

public int readInt()

Description copied from class: DataInput

Reads four bytes and returns an int (LE byte order).

Overrides:

readInt in class DataInput

See Also:

• DataOutput.writeInt(int)
• BitUtil.VH_LE_INT

readLong

public long readLong()

Description copied from class: DataInput

Reads eight bytes and returns a long (LE byte order).

Overrides:

readLong in class DataInput

See Also:

• DataOutput.writeLong(long)
• BitUtil.VH_LE_LONG

readVInt

public int readVInt()

Description copied from class: DataInput

Reads an int stored in variable-length format. Reads between one and five bytes. Smaller values take fewer bytes. Negative numbers are supported, but should be avoided.

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

Overrides:

readVInt in class DataInput

See Also:

• DataOutput.writeVInt(int)

readVLong

public long readVLong()

Description copied from class: DataInput

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).

Overrides:

readVLong in class DataInput

See Also:

• DataOutput.writeVLong(long)

readByte

public byte readByte()

Description copied from class: DataInput

Reads and returns a single byte.

Specified by:

readByte in class DataInput

See Also:

• DataOutput.writeByte(byte)

readBytes

public void readBytes(byte[] b,
 int offset,
 int len)

Description copied from class: DataInput

Reads a specified number of bytes into an array at the specified offset.

Specified by:

readBytes in class DataInput

Parameters:

b - the array to read bytes into

offset - the offset in the array to start storing bytes

len - the number of bytes to read

See Also:

• DataOutput.writeBytes(byte[],int)