Class SimpleBindings

Simple class that binds expression variable names to s or other Expressions.

Example usage:

SimpleBindings bindings = new SimpleBindings();
// document's text relevance score
bindings.Add(new SortField("_score", SortFieldType.SCORE));
// integer NumericDocValues field (or from FieldCache)
bindings.Add(new SortField("popularity", SortFieldType.INT));
// another expression
bindings.Add("recency", myRecencyExpression);
// create a sort field in reverse order
Sort sort = new Sort(expr.GetSortField(bindings, true));
This is a Lucene.NET EXPERIMENTAL API, use at your own risk
Inheritance
System.Object
Bindings
SimpleBindings
Inherited Members
Namespace: Lucene.Net.Expressions
Assembly: Lucene.Net.Expressions.dll
Syntax
public sealed class SimpleBindings : Bindings

Constructors

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SimpleBindings()

Creates a new empty Bindings

Declaration
public SimpleBindings()

Methods

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Add(SortField)

Adds a to the bindings.

Declaration
public void Add(SortField sortField)
Parameters
Type Name Description
SortField sortField
Remarks

Adds a to the bindings.

This can be used to reference a DocValuesField, a field from FieldCache, the document's score, etc.

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Add(String, Expression)

Adds an Expression to the bindings.

Declaration
public void Add(string name, Expression expression)
Parameters
Type Name Description
System.String name
Expression expression
Remarks

Adds an Expression to the bindings.

This can be used to reference expressions from other expressions.

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GetValueSource(String)

Declaration
public override ValueSource GetValueSource(string name)
Parameters
Type Name Description
System.String name
Returns
Type Description
ValueSource
Overrides
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Validate()

Traverses the graph of bindings, checking there are no cycles or missing references

Declaration
public void Validate()