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Java Source Code / Java Documentation » Net » lucene connector » org.apache.lucene.search.function

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

org.apache.lucene.search.function .ValueSource

All known Subclasses:   org.apache.lucene.search.function .ReverseOrdFieldSource,  org.apache.lucene.search.function .FieldCacheSource,  org.apache.lucene.search.function .OrdFieldSource,
ValueSource
abstract public class ValueSource implements Serializable(Code)
Expert: source of values for basic function queries.
At its default/simplest form, values - one per doc - are used as the score of that doc.
Values are instantiated as org.apache.lucene.search.function.DocValues DocValues for a particular reader.
ValueSource implementations differ in RAM requirements: it would always be a factor of the number of documents, but for each document the number of bytes can be 1, 2, 4, or 8.
WARNING: The status of the search.function package is experimental. The APIs introduced here might change in the future and will not be supported anymore in such a case.

Method Summary
abstract public String description()

abstract public boolean equals(Object o)
     Needed for possible caching of query results - used by ValueSourceQuery.equals(Object) .
abstract public DocValues getValues(IndexReader reader)
     Return the DocValues used by the function query.
Parameters:
  reader - the IndexReader used to read these values.If any caching is involved, that caching would also be IndexReader based.
abstract public int hashCode()
     Needed for possible caching of query results - used by ValueSourceQuery.hashCode .
public String toString()


Method Detail
description
abstract public String description()(Code)
description of field, used in explain()

equals
abstract public boolean equals(Object o)(Code)
Needed for possible caching of query results - used by ValueSourceQuery.equals(Object) .
See Also:   Object.equals(Object)

getValues
abstract public DocValues getValues(IndexReader reader) throws IOException(Code)
Return the DocValues used by the function query.
Parameters:
  reader - the IndexReader used to read these values.If any caching is involved, that caching would also be IndexReader based.
throws:
  IOException - for any error.

hashCode
abstract public int hashCode()(Code)
Needed for possible caching of query results - used by ValueSourceQuery.hashCode .
See Also:   Object.hashCode

toString
public String toString()(Code)

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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