Package org.datanucleus.query.evaluator

Package providing the basis for evaluation of a string-based query.

See: Description

Class Summary

Class	Description
AbstractExpressionEvaluator	Abstract evaluator for an expression.
AbstractResultClassMapper	Abstract mapper for getting results from a query.
InMemoryQueryResult	Simple wrapper to results generated by the in-memory query process suitable for use by JDO/JPA.
JavaQueryEvaluator	Class to evaluate a Java "string-based" query in whole or part.
JDOQLEvaluator	Class to evaluate a JDOQL query in whole or part.
JDOQLResultClassMapper	Class to map the results of a JDOQL query to the result class.
JPQLEvaluator	Class to evaluate a JPQL query in whole or part.
JPQLResultClassMapper	Class to map the results of a JPQL query to the result class.

Package org.datanucleus.query.evaluator Description

Package providing the basis for evaluation of a string-based query. The JDOQLEvaluator/JPQLEvaluator provide in-memory evaluation of components of a string-based query. For example you can evaluate a collection of objects against just the filter, or just the range, or ordering etc, or any combination of the these. This provides flexibility where the datastore native query language only supports a subset of what JDOQL/JPQL require so the remainder can be applied in-memory.