com.google.common.hash

Class AbstractHasher

java.lang.Object

com.google.common.hash.AbstractHasher

All Implemented Interfaces:

Hasher, PrimitiveSink

Direct Known Subclasses:

AbstractByteHasher, AbstractNonStreamingHashFunction.BufferingHasher, AbstractStreamingHashFunction.AbstractStreamingHasher

abstract class AbstractHasher
extends java.lang.Object
implements Hasher

An abstract hasher, implementing putBoolean(boolean), putDouble(double), putFloat(float), putUnencodedChars(CharSequence), and putString(CharSequence, Charset) as prescribed by Hasher.

Constructor Summary

Constructors

Constructor and Description
AbstractHasher()

Method Summary

Modifier and Type	Method and Description
Hasher	putBoolean(boolean b) Equivalent to putByte(b ? (byte) 1 : (byte) 0).
Hasher	putDouble(double d) Equivalent to putLong(Double.doubleToRawLongBits(d)).
Hasher	putFloat(float f) Equivalent to putInt(Float.floatToRawIntBits(f)).
Hasher	putString(java.lang.CharSequence charSequence, java.nio.charset.Charset charset) Equivalent to putBytes(charSequence.toString().getBytes(charset)).
Hasher	putUnencodedChars(java.lang.CharSequence charSequence) Equivalent to processing each char value in the CharSequence, in order.

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, putByte, putBytes, putBytes, putChar, putInt, putLong, putObject, putShort

Constructor Detail

AbstractHasher

AbstractHasher()

Method Detail

putBoolean

public final Hasher putBoolean(boolean b)

Description copied from interface: Hasher

Equivalent to putByte(b ? (byte) 1 : (byte) 0).

Specified by:

putBoolean in interface Hasher

Specified by:

putBoolean in interface PrimitiveSink

putDouble

public final Hasher putDouble(double d)

Description copied from interface: Hasher

Equivalent to putLong(Double.doubleToRawLongBits(d)).

Specified by:

putDouble in interface Hasher

Specified by:

putDouble in interface PrimitiveSink

putFloat

public final Hasher putFloat(float f)

Description copied from interface: Hasher

Equivalent to putInt(Float.floatToRawIntBits(f)).

Specified by:

putFloat in interface Hasher

Specified by:

putFloat in interface PrimitiveSink

putUnencodedChars

public Hasher putUnencodedChars(java.lang.CharSequence charSequence)

Description copied from interface: Hasher

Equivalent to processing each char value in the CharSequence, in order. In other words, no character encoding is performed; the low byte and high byte of each char are hashed directly (in that order). The input must not be updated while this method is in progress.

Warning: This method will produce different output than most other languages do when running the same hash function on the equivalent input. For cross-language compatibility, use Hasher.putString(java.lang.CharSequence, java.nio.charset.Charset), usually with a charset of UTF-8. For other use cases, use putUnencodedChars.

Specified by:

putUnencodedChars in interface Hasher

Specified by:

putUnencodedChars in interface PrimitiveSink

putString

public Hasher putString(java.lang.CharSequence charSequence,
                        java.nio.charset.Charset charset)

Description copied from interface: Hasher

Equivalent to putBytes(charSequence.toString().getBytes(charset)).

Warning: This method, which reencodes the input before hashing it, is useful only for cross-language compatibility. For other use cases, prefer Hasher.putUnencodedChars(java.lang.CharSequence), which is faster, produces the same output across Java releases, and hashes every char in the input, even if some are invalid.

Specified by:

putString in interface Hasher

Specified by:

putString in interface PrimitiveSink