Package org.apache.lucene.queries.function.valuesource

Class SimpleBoolFunction

java.lang.Object

org.apache.lucene.queries.function.ValueSource

org.apache.lucene.queries.function.valuesource.BoolFunction

org.apache.lucene.queries.function.valuesource.SimpleBoolFunction

public abstract class SimpleBoolFunction
extends BoolFunction

BoolFunction implementation which applies an extendible boolean function to the values of a single wrapped ValueSource. Functions this can be used for include whether a field has a value or not, or inverting the boolean value of the wrapped ValueSource.

Constructor Summary

Constructors

Constructor	Description
SimpleBoolFunction(ValueSource source)

Method Summary

Modifier and Type	Method	Description
void	createWeight(Map context, IndexSearcher searcher)	Implementations should propagate createWeight to sub-ValueSources which can optionally store weight info in the context.
String	description()	description of field, used in explain()
boolean	equals(Object o)
BoolDocValues	getValues(Map context, AtomicReaderContext readerContext)	Gets the values for this reader and the context that was previously passed to createWeight()
int	hashCode()

Methods inherited from class org.apache.lucene.queries.function.ValueSource

getSortField, newContext, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Details

SimpleBoolFunction

public SimpleBoolFunction(ValueSource source)

Method Details

getValues

public BoolDocValues getValues(Map context,
 AtomicReaderContext readerContext)
                        throws IOException

Description copied from class: ValueSource

Gets the values for this reader and the context that was previously passed to createWeight()

Specified by:

getValues in class ValueSource

Throws:

IOException

description

public String description()

Description copied from class: ValueSource

description of field, used in explain()

Specified by:

description in class ValueSource

hashCode

public int hashCode()

Specified by:

hashCode in class ValueSource

equals

public boolean equals(Object o)

Specified by:

equals in class ValueSource

createWeight

public void createWeight(Map context,
 IndexSearcher searcher)
                  throws IOException

Description copied from class: ValueSource

Implementations should propagate createWeight to sub-ValueSources which can optionally store weight info in the context. The context object will be passed to getValues() where this info can be retrieved.

Overrides:

createWeight in class ValueSource

Throws:

IOException