io.druid.query.filter

Class NoopDimFilter

java.lang.Object

io.druid.query.filter.NoopDimFilter

All Implemented Interfaces:

DimFilter

public class NoopDimFilter
extends Object
implements DimFilter

Constructor Summary

Constructors

Constructor and Description
NoopDimFilter()

Method Summary

Modifier and Type	Method and Description
byte[]	getCacheKey()
DimFilter	optimize()
Filter	toFilter() Returns a Filter that implements this DimFilter.

Methods inherited from class java.lang.Object

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

Constructor Detail

NoopDimFilter

public NoopDimFilter()

Method Detail

getCacheKey

public byte[] getCacheKey()

Specified by:

getCacheKey in interface DimFilter

optimize

public DimFilter optimize()

Specified by:

optimize in interface DimFilter

Returns:

Returns an optimized filter. returning the same filter can be a straightforward default implementation.

toFilter

public Filter toFilter()

Description copied from interface: DimFilter

Returns a Filter that implements this DimFilter. This does not generally involve optimizing the DimFilter, so it does make sense to optimize first and then call toFilter on the resulting DimFilter.

Specified by:

toFilter in interface DimFilter

Returns:

a Filter that implements this DimFilter, or null if this DimFilter is a no-op.