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

java.lang.Object
  extended by org.apache.lucene.queries.function.ValueSource
      extended by 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
 class MultiFunction.Values
           
 
Field Summary
protected  List<ValueSource> sources
           
 
Constructor Summary
MultiFunction(List<ValueSource> sources)
           
 
Method Summary
 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()
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 fcontext, AtomicReaderContext readerContext)
           
 
Methods inherited from class org.apache.lucene.queries.function.ValueSource
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

description

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

valsArr

public static FunctionValues[] valsArr(List<ValueSource> sources,
                                       Map fcontext,
                                       AtomicReaderContext readerContext)
                                throws IOException
Throws:
IOException

toString

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

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

hashCode

public int hashCode()
Specified by:
hashCode in class ValueSource

equals

public boolean equals(Object o)
Specified by:
equals in class ValueSource


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