Package com.google.common.hash

Class AbstractByteHasher

java.lang.Object

com.google.common.hash.AbstractHasher

com.google.common.hash.AbstractByteHasher

All Implemented Interfaces:

Hasher, PrimitiveSink

Direct Known Subclasses:

ChecksumHashFunction.ChecksumHasher, Crc32cHashFunction.Crc32cHasher, MacHashFunction.MacHasher, MessageDigestHashFunction.MessageDigestHasher

abstract class AbstractByteHasher
extends AbstractHasher

Abstract Hasher that handles converting primitives to bytes using a scratch ByteBuffer and streams all bytes to a sink to compute the hash.

Field Summary

Fields

Modifier and Type	Field	Description
private java.nio.ByteBuffer	scratch

Constructor Summary

Constructors

Constructor	Description
AbstractByteHasher()

Method Summary

Modifier and Type	Method	Description
Hasher	putByte(byte b)	Puts a byte into this sink.
Hasher	putBytes(byte[] bytes)	Puts an array of bytes into this sink.
Hasher	putBytes(byte[] bytes, int off, int len)	Puts a chunk of an array of bytes into this sink.
Hasher	putChar(char c)	Puts a character into this sink.
Hasher	putInt(int i)	Puts an int into this sink.
Hasher	putLong(long l)	Puts a long into this sink.
<T> Hasher	putObject(T instance, Funnel<? super T> funnel)	A simple convenience for funnel.funnel(object, this).
Hasher	putShort(short s)	Puts a short into this sink.
protected abstract void	update(byte b)	Updates this hasher with the given byte.
protected void	update(byte[] b)	Updates this hasher with the given bytes.
protected void	update(byte[] b, int off, int len)	Updates this hasher with len bytes starting at off in the given buffer.
private Hasher	update(int bytes)	Updates the sink with the given number of bytes from the buffer.

Methods inherited from class com.google.common.hash.AbstractHasher

putBoolean, putDouble, putFloat, putString, putUnencodedChars

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.google.common.hash.Hasher

hash, hashCode

Field Detail

scratch

private final java.nio.ByteBuffer scratch

Constructor Detail

AbstractByteHasher

AbstractByteHasher()

Method Detail

update

protected abstract void update(byte b)

Updates this hasher with the given byte.

update

protected void update(byte[] b)

Updates this hasher with the given bytes.

update

protected void update(byte[] b,
                      int off,
                      int len)

Updates this hasher with len bytes starting at off in the given buffer.

putByte

public Hasher putByte(byte b)

Description copied from interface: PrimitiveSink

Puts a byte into this sink.

Parameters:

b - a byte

Returns:

this instance

putBytes

public Hasher putBytes(byte[] bytes)

Description copied from interface: PrimitiveSink

Puts an array of bytes into this sink.

Parameters:

bytes - a byte array

Returns:

this instance

putBytes

public Hasher putBytes(byte[] bytes,
                       int off,
                       int len)

Description copied from interface: PrimitiveSink

Puts a chunk of an array of bytes into this sink. bytes[off] is the first byte written, bytes[off + len - 1] is the last.

Parameters:

bytes - a byte array

off - the start offset in the array

len - the number of bytes to write

Returns:

this instance

update

private Hasher update(int bytes)

Updates the sink with the given number of bytes from the buffer.

putShort

public Hasher putShort(short s)

Description copied from interface: PrimitiveSink

Puts a short into this sink.

putInt

public Hasher putInt(int i)

Description copied from interface: PrimitiveSink

Puts an int into this sink.

putLong

public Hasher putLong(long l)

Description copied from interface: PrimitiveSink

Puts a long into this sink.

putChar

public Hasher putChar(char c)

Description copied from interface: PrimitiveSink

Puts a character into this sink.

putObject

public <T> Hasher putObject(T instance,
                            Funnel<? super T> funnel)

Description copied from interface: Hasher

A simple convenience for funnel.funnel(object, this).