Fast Object Database for Java - with JPA/JDO support

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JPA Query Expressions (JPQL / Criteria)

Query expressions are the foundations on which JPQL and criteria queries are built. Every query consists of clauses - SELECT, FROM, WHERE, GROUP BY, HAVING and ORDER BY, and each clause consists of JPQL / Criteria query expressions. Atomic Expressions The atomic query expressions are: JPQL
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javax.persistence.criteria.Subquery

: having clause predicate Since: JPA 2.0 Class getJavaType() Return the Java type of the tuple element ... : the modified query Since: JPA 2.0 Subquery having( Predicate... restrictions) Specify restrictions ... restriction predicates. Replaces the previously added having restriction(s), if any. If no restrictions
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javax.persistence.criteria.CriteriaQuery

have been specified. Returns: having clause predicate Since: JPA 2.0 List getOrderList() Return ... Since: JPA 2.0 AbstractQuery having(Predicate... restrictions) Specify restrictions over the groups ... the previously having added restriction(s), if any. If no restrictions are specified, any
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javax.jdo.JDOEntityManager

) Get the objects managed by this persistence manager having the specified object states. Get the objects managed by this persistence manager having the specified object states. Parameters: states - The states ... having the specified object states and being instances of the specified classes. Get the objects managed
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javax.jdo.PersistenceManager

by this persistence manager having the specified object states. Get the objects managed by this persistence manager having the specified object states. Parameters: states - The states of objects ... > states, Class... classes) Get the objects managed by this persistence manager having the specified
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javax.persistence.criteria.AbstractQuery

if no restrictions have been specified. Returns: having clause predicate Since: JPA 2.0 Predicate getRestriction ... query Since: JPA 2.0 AbstractQuery having( Predicate... restrictions) Specify restrictions ... predicates. Replaces the previously having added restriction(s), if any. If no restrictions are specified
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javax.jdo.Query

the grouping expressions, optionally including a "having" clause. Set the grouping expressions, optionally including a "having" clause. When grouping is specified, each result expression ... : group - a comma-delimited list of expressions, optionally followed by the "having" keyword and a boolean
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setGrouping(group)

Method javax.jdo.Query void setGrouping( String group ) Set the grouping expressions, optionally including a "having" clause. When grouping is specified, each result expression ... - a comma-delimited list of expressions, optionally followed by the "having" keyword and a boolean expression Since: JDO 2.0
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getManagedObjects(states, classes)

Method javax.jdo.PersistenceManager Set getManagedObjects( EnumSet states, Class... classes ) Get the objects managed by this persistence manager having the specified object states and being instances of the specified classes. Parameters: states - The states of objects
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getManagedObjects(states)

Method javax.jdo.PersistenceManager Set getManagedObjects( EnumSet states ) Get the objects managed by this persistence manager having the specified object states. Parameters: states - The states of objects that we are interested in Returns: the objects Since: JDO 2.1

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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