Package org.apache.lucene.store

Class GrowableByteArrayDataOutput

java.lang.Object

org.apache.lucene.store.DataOutput

org.apache.lucene.store.GrowableByteArrayDataOutput

All Implemented Interfaces:

Accountable

public final class GrowableByteArrayDataOutput
extends DataOutput
implements Accountable

A DataOutput that can be used to build a byte[].

Field Summary

Fields

Modifier and Type	Field	Description
private byte[]	bytes	The bytes
private int	length	The length
(package private) static final int	MIN_UTF8_SIZE_TO_ENABLE_DOUBLE_PASS_ENCODING	Minimum utf8 byte size of a string over which double pass over string is to save memory during encode
private byte[]	scratchBytes

Fields inherited from interface org.apache.lucene.util.Accountable

NULL_ACCOUNTABLE

Constructor Summary

Constructors

Constructor	Description
GrowableByteArrayDataOutput(int cp)	Create a GrowableByteArrayDataOutput with the given initial capacity.

Method Summary

Modifier and Type	Method	Description
byte[]	getBytes()
int	getPosition()
long	ramBytesUsed()	Return the memory usage of this object in bytes.
void	reset()
void	writeByte(byte b)	Writes a single byte.
void	writeBytes(byte[] b, int off, int len)	Writes an array of bytes.
void	writeString(String string)	Writes a string.

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

copyBytes, writeBytes, writeInt, writeLong, writeMapOfStrings, writeSetOfStrings, writeShort, writeVInt, writeVLong, writeZInt, writeZLong

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.lucene.util.Accountable

getChildResources

Field Details

MIN_UTF8_SIZE_TO_ENABLE_DOUBLE_PASS_ENCODING

static final int MIN_UTF8_SIZE_TO_ENABLE_DOUBLE_PASS_ENCODING

Minimum utf8 byte size of a string over which double pass over string is to save memory during encode

See Also:

• Constant Field Values

bytes

private byte[] bytes

The bytes

length

private int length

The length

scratchBytes

private byte[] scratchBytes

Constructor Details

GrowableByteArrayDataOutput

public GrowableByteArrayDataOutput(int cp)

Create a GrowableByteArrayDataOutput with the given initial capacity.

Method Details

writeByte

public void writeByte(byte b)

Description copied from class: DataOutput

Writes a single byte.

The most primitive data type is an eight-bit byte. Files are accessed as sequences of bytes. All other data types are defined as sequences of bytes, so file formats are byte-order independent.

Specified by:

writeByte in class DataOutput

See Also:

• DataInput.readByte()

writeBytes

public void writeBytes(byte[] b,
 int off,
 int len)

Description copied from class: DataOutput

Writes an array of bytes.

Specified by:

writeBytes in class DataOutput

Parameters:

b - the bytes to write

off - the offset in the byte array

len - the number of bytes to write

See Also:

• DataInput.readBytes(byte[],int,int)

writeString

public void writeString(String string)
                 throws IOException

Description copied from class: DataOutput

Writes a string.

Writes strings as UTF-8 encoded bytes. First the length, in bytes, is written as a VInt, followed by the bytes.

Overrides:

writeString in class DataOutput

Throws:

IOException

See Also:

• DataInput.readString()

getBytes

public byte[] getBytes()

getPosition

public int getPosition()

reset

public void reset()

ramBytesUsed

public long ramBytesUsed()

Description copied from interface: Accountable

Return the memory usage of this object in bytes. Negative values are illegal.

Specified by:

ramBytesUsed in interface Accountable