Package org.datanucleus.query.inmemory

Package providing the evaluation of queries using an in-memory process with evaluators for JDOQL and JPQL.

See: Description

Interface Summary

Interface	Description
InvocationEvaluator	Interface representing an evaluator for an invocation of a method/function.

Class Summary

Class	Description
AbstractResultClassMapper	Abstract mapper for getting results from a query.
AggregateExpression
BigDecimalAggregateExpression	Expression representing a BigDecimal, used in evaluation of aggregates.
BigIntegerAggregateExpression	Expression representing a BigInteger, used in evaluation of aggregates.
DateAggregateExpression	Expression representing a "java.util.Date" (and subclasses), used in evaluation of aggregates.
DoubleAggregateExpression	Expression representing a Double, used in evaluation of aggregates.
FloatAggregateExpression	Expression representing a Float, used in evaluation of aggregates.
InMemoryExpressionEvaluator	Class providing evaluation of java "string-based" queries in-memory.
InMemoryFailure	Class representing a failure in the in-memory evaluation process.
InMemoryQueryResult	Simple wrapper to results generated by the in-memory query process suitable for use by JDO/JPA.
IntegerAggregateExpression	Expression representing an Integer, used in evaluation of aggregates.
JavaQueryInMemoryEvaluator	Class to evaluate a Java "string-based" query in whole or part.
JDOQLInMemoryEvaluator	Class to evaluate a JDOQL query in whole or part.
JDOQLResultClassMapper	Class to map the results of a JDOQL query to the result class.
JPQLInMemoryEvaluator	Class to evaluate a JPQL query in whole or part.
JPQLResultClassMapper	Class to map the results of a JPQL query to the result class.
LongAggregateExpression	Expression representing a Long, used in evaluation of aggregates.
NumericAggregateExpression
SetExpression	Expression for the aggregation of a set of object values.
ShortAggregateExpression	Expression representing a Short, used in evaluation of aggregates.
StringAggregateExpression	Expression representing a String, used in evaluation of aggregates.

Exception Summary

Exception	Description
VariableNotSetException	Exception representing a variable not having its value currently set in the query.

Package org.datanucleus.query.inmemory Description

Package providing the evaluation of queries using an in-memory process with evaluators for JDOQL and JPQL.

Contains a series of classes implementing org.datanucleus.query.inmemory.InvocationEvaluator providing support for particular functions (in JDOQL/JPQL). Contains a series of classes implementing org.datanucleus.query.inmemory.AggregateExpression providing support for aggregation of different java types. Note that the in-memory query evaluator only supports a subset of the full syntax supported by JDOQL/JPQL. For example JOINs are not supported, or some subqueries.