Class JavascriptCompiler

An expression compiler for javascript expressions.

Inheritance
System.Object
JavascriptCompiler
Assembly: Lucene.Net.Expressions.dll
Syntax
public class JavascriptCompiler : object
Remarks

An expression compiler for javascript expressions.

Example:

Expression foo = JavascriptCompiler.Compile("((0.3*popularity)/10.0)+(0.7*score)");

See the Lucene.Net.Expressions.JS for the supported syntax and default functions.

You can compile with an alternate set of functions via Compile(String, IDictionary<String, MethodInfo>). For example:

IDictionary<string, MethodInfo> functions = new Dictionary<string, MethodInfo>();
// add all the default functions
functions.PutAll(JavascriptCompiler.DEFAULT_FUNCTIONS);
// add sqrt()
functions.Put("sqrt", (typeof(Math)).GetMethod("Sqrt", new Type[] { typeof(double) }));
// call compile with customized function map
Expression foo = JavascriptCompiler.Compile("sqrt(score)+ln(popularity)", functions);

@lucene.experimental

Fields

Name Description
DEFAULT_FUNCTIONS

The default set of functions available to expressions.

Methods

Name Description
Compile(String)

Compiles the given expression.
Compile(String, IDictionary<String, MethodInfo>)

Compiles the given expression with the supplied custom functions.

Extension Methods