parquet.hadoop.metadata

Class Canonicalizer<T>

java.lang.Object

parquet.hadoop.metadata.Canonicalizer<T>

Type Parameters:

T -

public class Canonicalizer<T>
extends Object

returns canonical representation of objects (similar to String.intern()) to save memory if a.equals(b) then canonicalize(a) == canonicalize(b) this class is thread safe

Author:

Julien Le Dem

Constructor Summary

Constructors

Constructor and Description
Canonicalizer()

Method Summary

Methods

Modifier and Type	Method and Description
T	canonicalize(T value)
protected T	toCanonical(T value)

Methods inherited from class java.lang.Object

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

Constructor Detail

Canonicalizer

public Canonicalizer()

Method Detail

canonicalize

public final T canonicalize(T value)

Parameters:

value - the value to canonicalize

Returns:

the corresponding canonical value

toCanonical

protected T toCanonical(T value)

Parameters:

value - the value to canonicalize if needed

Returns:

the canonicalized value