Query serialization logic

The main functionality of Querydsl is to map a query model into an underlying query, execute it, and return the results. This page summarizes how and where the query transformation is defined for various modules.

The String based serializations (JPA, JDO and SQL) share common superclasses for the serialization logic

• Operation templates Templates
• Serialization SerializerBase

other serialization logic (e.g. Lucene and Mongodb) are based on custom Expression visitors

collections

String based serialization

• Operation templates CollQueryTemplates
• Serialization CollQuerySerializer

hibernate-search

Lucene query serialization

• Serialization SearchSerializer

jdo

String based serialization into JDOQL

• Operation templates JDOQLTemplates
• Serialization JDOQLSerializer

jpa

String based serialization into JPQL

• Operation templates JPQLTemplates
• Serialization JPQLSerializer

lucene3

Serialization into Lucene 3 query

• Serialization LuceneSerializer

lucene4

Serialization into Lucene 4 query

• Serialization LuceneSerializer

mongodb

Serialization into Mongodb query

• Serialization MongodbSerializer

sql

String based serialization into SQL

• Operation templates SQLTemplates
• Serialization SQLSerializer

SQL dialect specific customizations are in subclasses of SQLTemplates