Lucene Query Parser for Javascript

This is an implementation of the Lucene Query Parser developed using PEG.js.

Example

A quick example of how to use it:

// return the expression tree
var results = lucenequeryparser.parse('title:"The Right Way" AND text:go');

alert(results['left']['field']);      // title
alert(results['left']['term']);       // The Right Way
alert(results['operator']);           // AND
alert(results['right']['field']);     // text
alert(results['right']['term']);      // go

A slightly more complicated example:

// return the expression tree
var results = lucenequeryparser.parse('test AND (foo OR bar)');

alert(results['left']['term']);       // test
alert(results['operator']);           // AND

// the parantheses group becomes it's own nested node
var rightNode = results['right'];

alert(rightNode['left']['term']);     // foo
alert(rightNode['operator']);         // OR
alert(rightNode['right']['term']);    // bar

Unit Tests

To run the unit tests, just open SpecRunner.html in any browser. Unit tests are built with Jasmine.

Grammar

The parser is auto-generated from a PEG implementation in Javascript called PEG.js.

To test the grammar without using the generated parser, or if you want to modify it, try out PEG.js online. This is a handy way to test an abritrary query and see what the results will be like or debug a problem with the parser for a given piece of data.

Community

If you'd like to help out with the project, or if you have a question, feel free to contact Troy Howard at [email protected].

Bug reports or feature requests should go in the Github issue tracker. Please include relevant sample data (the query) and a good description of the challenges you're facing.

Look to the wiki for documentation and other resources.