#Apache lucene query syntax how to
#Apache lucene query syntax full
#Apache lucene query syntax code

You don't need to worry about dealing with those. It uses the default Lucene query processors, text parser and builders, so Specially for people that do not want to extend the Query Parser. The class StandardQueryParser may be helpful,

To make it simpler to use the new query parser The classic Lucene query parser is located under StandardQueryParser and QueryParserWrapper This design allows to develop different query syntaxes very quickly. Messages, which is an important feature of a query parser. It also uses message classes thatĪllow to attach resource bundles. The third layer is a configurable map of builders, which map QueryNode types to its specificīuilder that will transform the QueryNode into Lucene Query object.įurthermore, the query parser uses flexible configuration objects. do query optimization before the query is executed or to tokenize Modify nodes or even the tree's structure. It is in fact aĬonfigurable chain of processors. QueryNodeProcessor The query node processors do most of the work. Lucene default implementations implements it using JavaCC. Must implement the interface SyntaxParser. This layer is the text parsing layer which simply transforms the It is a tree that initially represents the syntax of the The query parser has three layers and its core is what we call the Write a parser with a new syntax, while reusing the underlying Which Query objects to create for the terms.

#Apache lucene query syntax how to

Whether and how to tokenize/lemmatize/normalize the different terms or

It distinguishes the semantics of the different query components, e.g. 'a ANDī', '+a +b', 'AND(a,b)' could be different syntaxes for the same query.

The new query parser goal is to separate syntax and semantics of a query.

#Apache lucene query syntax code

This code is much moreįlexible and extensible than the Lucene query parser in 2.4.X. This new query parser was designed to have very genericĪrchitecture, so that it can be easily used for different QueryNode tree's can be converted to a lucene 2.4 syntax string, using toQueryString.Supported conversion is using a 2.4 compatible logic Standard Builders - convert QueryNode's into several lucene.Config Interfaces - Allow the consumer of the Query Parser to implementĪ diff Config Handler Objects to suite their needs.Processors Pipelines - Select your favorite ProcessorĪnd build a processor pipeline, to implement the features you need.QueryNode Processors - Optimize, validate, rewrite the.That can be converted into similar syntax QueryNode trees. QueryNode Trees - support for several syntaxes,.

#Apache lucene query syntax full

Full support for boolean logic (not enabled).

.flexible.standard: it contains the current Lucene query parser implementation using the new query parser API.

.re: it contains the query parser API classes, which should be extended by query parser implementations.

It's currently divided in 2 main packages: This project contains the new Lucene query parser implementation, which matches the syntax of the core QueryParser but offers a more modular architecture to enable customization. QueryParser which permits complex phrase query syntax eg '(john jon jonathan~) peters*'Įxtendable QueryParser provides a simple and flexible extension mechanism by overloading query field names. QueryParser that passes Fuzzy-, Prefix-, Range-, and WildcardQuerys through the given analyzer. This module provides a number of queryparsers:Ī Simple Lucene QueryParser implemented with JavaCC.