org.apache.lucene.expressions
Class Bindings

java.lang.Object
  org.apache.lucene.expressions.Bindings

Direct Known Subclasses:

SimpleBindings

public abstract class Bindings
extends Object

Binds variable names in expressions to actual data.

These are typically DocValues fields/FieldCache, the document's relevance score, or other ValueSources.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Constructor Summary

protected

Bindings() Sole constructor.

Method Summary

protected ValueSource	getScoreValueSource() Returns a ValueSource over relevance scores
abstract ValueSource	getValueSource(String name) Returns a ValueSource bound to the variable name.

Methods inherited from class java.lang.Object

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

Constructor Detail

Bindings

protected Bindings()

Sole constructor. (For invocation by subclass constructors, typically implicit.)

Method Detail

getValueSource

public abstract ValueSource getValueSource(String name)

Returns a ValueSource bound to the variable name.

getScoreValueSource

protected final ValueSource getScoreValueSource()

Returns a ValueSource over relevance scores