ExpressionValueSourceParser (Solr 9.9.0 core API)

java.lang.Object
- org.apache.solr.search.ValueSourceParser
- - org.apache.solr.search.ExpressionValueSourceParser

All Implemented Interfaces:

NamedListInitializedPlugin
```
public class ExpressionValueSourceParser
extends ValueSourceParser
```
A ValueSource parser configured with a pre-compiled expression that can then be evaluated at request time. It's powered by the Lucene Expressions module, which is a subset of JavaScript.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class ExpressionValueSourceParser.SolrBindings
A bindings class that uses schema fields to resolve variables.

Field Summary

Fields
Modifier and Type Field Description

static String EXPRESSION_KEY

static String SCORE_KEY
- Fields inherited from class org.apache.solr.search.ValueSourceParser
  standardValueSourceParsers

Constructor Summary

Constructors
Constructor Description

ExpressionValueSourceParser()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`init(org.apache.solr.common.util.NamedList<?> args)`	`init` will be called just once, immediately after creation.
`org.apache.lucene.queries.function.ValueSource`	`parse(FunctionQParser fp)`	Parse the user input into a ValueSource.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - SCORE_KEY
```
public static final String SCORE_KEY
```
    See Also:
    
    Constant Field Values
  - EXPRESSION_KEY
```
public static final String EXPRESSION_KEY
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - ExpressionValueSourceParser
```
public ExpressionValueSourceParser()
```
- Method Detail
  - init
```
public void init(org.apache.solr.common.util.NamedList<?> args)
```
    Description copied from interface: NamedListInitializedPlugin
    
    init will be called just once, immediately after creation.
    Source of the initialization arguments will typically be solrconfig.xml, but will ultimately depends on the plugin itself
    
    Parameters:
    
    args - non-null list of initialization parameters (may be empty)
  - parse
```
public org.apache.lucene.queries.function.ValueSource parse(FunctionQParser fp)
                                                     throws SyntaxError
```
    Description copied from class: ValueSourceParser
    
    Parse the user input into a ValueSource.
    
    Specified by:
    
    parse in class ValueSourceParser
    
    Throws:
    
    SyntaxError