Package org.apache.lucene.search

Class BoostAttributeImpl

java.lang.Object

org.apache.lucene.util.AttributeImpl

org.apache.lucene.search.BoostAttributeImpl

All Implemented Interfaces:

Cloneable, BoostAttribute, Attribute

public final class BoostAttributeImpl
extends AttributeImpl
implements BoostAttribute

Implementation class for BoostAttribute.

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

Field Summary

Fields inherited from interface org.apache.lucene.search.BoostAttribute

DEFAULT_BOOST

Constructor Summary

Constructors

Constructor	Description
BoostAttributeImpl()

Method Summary

Modifier and Type	Method	Description
void	clear()	Clears the values in this AttributeImpl and resets it to its default value.
void	copyTo(AttributeImpl target)	Copies the values from this Attribute into the passed-in target attribute.
float	getBoost()	Retrieves the boost, default is 1.0f.
void	reflectWith(AttributeReflector reflector)	This method is for introspection of attributes, it should simply add the key/values this attribute holds to the given AttributeReflector.
void	setBoost(float boost)	Sets the boost in this attribute

Methods inherited from class org.apache.lucene.util.AttributeImpl

clone, end, reflectAsString

Methods inherited from class java.lang.Object

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

Constructor Details

BoostAttributeImpl

public BoostAttributeImpl()

Method Details

setBoost

public void setBoost(float boost)

Description copied from interface: BoostAttribute

Sets the boost in this attribute

Specified by:

setBoost in interface BoostAttribute

getBoost

public float getBoost()

Description copied from interface: BoostAttribute

Retrieves the boost, default is 1.0f.

Specified by:

getBoost in interface BoostAttribute

clear

public void clear()

Description copied from class: AttributeImpl

Clears the values in this AttributeImpl and resets it to its default value. If this implementation implements more than one Attribute interface it clears all.

Specified by:

clear in class AttributeImpl

copyTo

public void copyTo(AttributeImpl target)

Description copied from class: AttributeImpl

Copies the values from this Attribute into the passed-in target attribute. The target implementation must support all the Attributes this implementation supports.

Specified by:

copyTo in class AttributeImpl

reflectWith

public void reflectWith(AttributeReflector reflector)

Description copied from class: AttributeImpl

This method is for introspection of attributes, it should simply add the key/values this attribute holds to the given AttributeReflector.

Implementations look like this (e.g. for a combined attribute implementation):

   public void reflectWith(AttributeReflector reflector) {
     reflector.reflect(CharTermAttribute.class, "term", term());
     reflector.reflect(PositionIncrementAttribute.class, "positionIncrement", getPositionIncrement());
   }
 

If you implement this method, make sure that for each invocation, the same set of Attribute interfaces and keys are passed to AttributeReflector.reflect(java.lang.Class<? extends org.apache.lucene.util.Attribute>, java.lang.String, java.lang.Object) in the same order, but possibly different values. So don't automatically exclude e.g. null properties!

Specified by:

reflectWith in class AttributeImpl

See Also:

• AttributeImpl.reflectAsString(boolean)