Package org.datanucleus.query.typesafe

Package providing a typesafe query mechanism, primarily for JDO.

See: Description

Interface Summary

Interface	Description
BooleanExpression	Representation of a boolean expression.
ByteExpression	Representation of a byte expression.
CharacterExpression	Representation of a character expression.
CollectionExpression<T extends Collection<E>,E>	Representation of a collection in a query.
ComparableExpression<T>	Representation of an expression for a Java type that implements java.lang.Comparable.
DateExpression<T>	Representation of a date in a query.
DateTimeExpression<T>	Representation of a date-time type in a query.
EnumExpression<T>	Representation of an Enum in a query.
Expression<T>	Representation of an expression in a query.
ListExpression<T extends List<E>,E>	Representation of a List in a query.
MapExpression<T extends Map<K,V>,K,V>	Representation of a map in a query.
NumericExpression<T>	Representation of a numeric expression.
ObjectExpression<T>	Representation of an Object as an expression.
OrderExpression<T>	Expression representing the ordering using an expression and a direction.
PersistableExpression<T>	Expression representing a persistable object in a query (e.g alias.persistableField).
StringExpression	Representation of a string in a query.
SubqueryExpression	Representation of a subquery in a query.
TemporalExpression<T>	Representation of a temporal type in a query.
TimeExpression<T>	Representation of a time in a query.
TypesafeQuery<T>	Interface for a type-safe query, using a fluent API.
TypesafeSubquery<T>	Interface for a type-safe subquery, using a fluent API.

Enum Summary

Enum	Description
OrderExpression.OrderDirection

Package org.datanucleus.query.typesafe Description

Package providing a typesafe query mechanism, primarily for JDO. Fields/Params/Vars of a persistable type are represented as PathExpression. This type is extended by all "Q" classes, to provide access to persistable fields. Fields/Params/Vars of a container type are represented as CollectionExpression, MapExpression Fields/Params/Vars of other types, or literals are represented by

• StringExpression
• EnumExpression
• NumericExpression
• BooleanExpression
• ByteExpression
• CharacterExpression
• DateExpression
• ObjectExpression

This package is likely to be renamed "javax.jdo.query" in the future when it makes its way into JDO.