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javax.persistence.criteria.MapJoin

>, From<Z,V>, Join<Z,V>, Path<V>, PluralJoin<Z,Map<K,V>,V>, Selection<V>, TupleElement<V ... of the join jt - join type Returns: the resulting fetch join Since: JPA 2.0 Path<Y> get(String attributeName) Create a path corresponding to the referenced attribute. Create a path corresponding
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javax.persistence.criteria.From

>, Path<X>, Selection<X>, TupleElement<X> Subinterfaces: CollectionJoin, Join, ListJoin, MapJoin ... of associations, embeddables, and collections belonging to the type, and for Paths of attributes ... : the resulting fetch join Since: JPA 2.0 Path<Y> get(String attributeName) Create a path corresponding
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javax.persistence.criteria.Join

>, From<Z,X>, Path<X>, Selection<X>, TupleElement<X> Subinterfaces: CollectionJoin, ListJoin, MapJoin ... - join type Returns: the resulting fetch join Since: JPA 2.0 Path<Y> get(String attributeName) Create a path corresponding to the referenced attribute. Create a path corresponding to the referenced
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javax.persistence.criteria.PluralJoin

<Z,E>, From<Z,E>, Join<Z,E>, Path<E>, Selection<E>, TupleElement<E> Subinterfaces: CollectionJoin ... : attribute - target of the join jt - join type Returns: the resulting fetch join Since: JPA 2.0 Path<Y> get(String attributeName) Create a path corresponding to the referenced attribute. Create a path
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javax.persistence.criteria.Root

<X,X>, Path<X>, Selection<X>, TupleElement<X> A root type in the from clause. Query roots ... Since: JPA 2.0 Path<Y> get(String attributeName) Create a path corresponding to the referenced attribute. Create a path corresponding to the referenced attribute. Note: Applications using the string-based
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Collections in JPQL and Criteria Queries

Collections may appear in JPQL queries: as parameters - when collections are assigned as arguments. as path expressions - in navigation to persistent collection fields. IS [NOT] EMPTY The IS [NOT ... these expressions, as shown in the following examples: // Create path and parameter expressions
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Comparison in JPQL and Criteria API

for building these expressions, as shown in the following examples: // Create String path ... = cb.parameter(String.class); // Create Integer path and parameter expressions: Expression
13

Online Backup

database file using the code above could generate a backup whose full path is c:\objectdb\backup ... parameter it represents a path relative to the ObjectDB home directory, and in client-server mode
1

[ODB1] Chapter 4 - JDO Metadata

name, X is the class name), whose class file is a/b/X.class, is searched in the following paths (in ... a/b/X.jdo Metadata for class X in the default package is searched in the following paths (in ... can be specified in a package.jdo file located in META-INF, WEB-INF or in any other path at the level
1

[ODB1] Chapter 3 - Persistent Classes

files, storing only the file names or paths in the database). Static and final fields ... classpath for input user classes -d output path for enhanced classes -s include

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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