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

Class MultiFunction

java.lang.Object

org.apache.lucene.queries.function.ValueSource

org.apache.lucene.queries.function.valuesource.MultiFunction

Direct Known Subclasses:

DefFunction

public abstract class MultiFunction
extends ValueSource

Abstract parent class for ValueSource implementations that wrap multiple ValueSources and apply their own logic.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	MultiFunction.Values	Base implementation that wraps multiple sources

Field Summary

Fields

Modifier and Type	Field	Description
protected List<ValueSource>	sources

Constructor Summary

Constructors

Constructor	Description
MultiFunction(List<ValueSource> sources)

Method Summary

Modifier and Type	Method	Description
static boolean	allExists(int doc, FunctionValues[] values)	Helper utility for FunctionValues
static boolean	allExists(int doc, FunctionValues values1, FunctionValues values2)	Equivalent to the FunctionValues[] method with the same name, but optimized for dealing with exactly 2 arguments.
static boolean	anyExists(int doc, FunctionValues[] values)	Helper utility for FunctionValues
static boolean	anyExists(int doc, FunctionValues values1, FunctionValues values2)	Equivalent to the FunctionValues[] method with the same name, but optimized for dealing with exactly 2 arguments.
void	createWeight(Map<Object,Object> 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()
static String	description(String name, List<ValueSource> sources)
boolean	equals(Object o)
int	hashCode()
protected abstract String	name()
static String	toString(String name, FunctionValues[] valsArr, int doc)
static FunctionValues[]	valsArr(List<ValueSource> sources, Map<Object,Object> fcontext, LeafReaderContext readerContext)

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

asDoubleValuesSource, asLongValuesSource, fromDoubleValuesSource, getSortField, getValues, newContext, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

sources

protected final List<ValueSource> sources

Constructor Detail

MultiFunction

public MultiFunction(List<ValueSource> sources)

Method Detail

name

protected abstract String name()

description

public String description()

Description copied from class: ValueSource

description of field, used in explain()

Specified by:

description in class ValueSource

allExists

public static boolean allExists(int doc,
                                FunctionValues[] values)
                         throws IOException

Helper utility for FunctionValues

Returns:

true if all of the specified values FunctionValues.exists(int) for the specified doc, else false.

Throws:

IOException

anyExists

public static boolean anyExists(int doc,
                                FunctionValues[] values)
                         throws IOException

Helper utility for FunctionValues

Returns:

true if any of the specified values FunctionValues.exists(int) for the specified doc, else false.

Throws:

IOException

allExists

public static boolean allExists(int doc,
                                FunctionValues values1,
                                FunctionValues values2)
                         throws IOException

Equivalent to the FunctionValues[] method with the same name, but optimized for dealing with exactly 2 arguments.

Returns:

true if both of the specified values FunctionValues.exists(int) for the specified doc, else false.

Throws:

IOException

See Also:

anyExists(int,FunctionValues[])

anyExists

public static boolean anyExists(int doc,
                                FunctionValues values1,
                                FunctionValues values2)
                         throws IOException

Equivalent to the FunctionValues[] method with the same name, but optimized for dealing with exactly 2 arguments.

Returns:

true if either of the specified values FunctionValues.exists(int) for the specified doc, else false.

Throws:

IOException

See Also:

anyExists(int,FunctionValues[])

description

public static String description(String name,
                                 List<ValueSource> sources)

valsArr

public static FunctionValues[] valsArr(List<ValueSource> sources,
                                       Map<Object,Object> fcontext,
                                       LeafReaderContext readerContext)
                                throws IOException

Throws:

IOException

toString

public static String toString(String name,
                              FunctionValues[] valsArr,
                              int doc)
                       throws IOException

Throws:

IOException

createWeight

public void createWeight(Map<Object,Object> 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

hashCode

public int hashCode()

Specified by:

hashCode in class ValueSource

equals

public boolean equals(Object o)

Specified by:

equals in class ValueSource