Fast Object Database for Java - with JPA/JDO support

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in(values)

Method javax.persistence.criteria.Expression Predicate in( Object... values ) Create a predicate to test whether the expression is a member of the argument list. Parameters: values - values to be tested against Returns: predicate testing for membership Since: JPA 2.0
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distinct(distinct)

Method javax.persistence.criteria.Subquery Subquery distinct( boolean distinct ) Specify whether duplicate query results will be eliminated. A true value will cause duplicates to be eliminated. A false value will cause duplicates to be retained. If distinct has not been specified, duplicate
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valueOf(name)

Static Method javax.persistence.criteria.Predicate.BooleanOperator BooleanOperator valueOf( String name ) Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. Parameters: name - the name
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trim(ts, x)

Method javax.persistence.criteria.CriteriaBuilder Expression trim( Trimspec ts, Expression x ) Create expression to trim blanks from a string. Parameters: ts - trim specification x - expression for string to trim Returns: trim expression Since: JPA 2.0
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greaterThanOrEqualTo(x, y)

Method javax.persistence.criteria.CriteriaBuilder Predicate greaterThanOrEqualTo( Expression x, Expression y ) Create a predicate for testing whether the first argument is greater than or equal to the second. Parameters: x - expression y - expression Returns: greater-than-or-equal predicate Since: JPA 2.0
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index()

Method javax.persistence.criteria.ListJoin Expression index() Create an expression that corresponds to the index of the object in the referenced association or element collection. This method must only be invoked upon an object that represents an association or element collection
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le(x, y)

Method javax.persistence.criteria.CriteriaBuilder Predicate le( Expression x, Expression y ) Create a predicate for testing whether the first argument is less than or equal to the second. Parameters: x - expression y - expression Returns: less-than-or-equal predicate Since: JPA 2.0
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lessThan(x, y)

Method javax.persistence.criteria.CriteriaBuilder Predicate lessThan( Expression x, Expression y ) Create a predicate for testing whether the first argument is less than the second. Parameters: x - expression y - expression Returns: less-than predicate Since: JPA 2.0
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fetch(attributeName, jt)

Method javax.persistence.criteria.FetchParent Fetch fetch( String attributeName, JoinType jt ) Create a fetch join to the specified attribute using the given join type. Parameters: attributeName - name of the attribute for the target of the join jt - join type Returns: the resulting fetch join
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substring(x, from)

Method javax.persistence.criteria.CriteriaBuilder Expression substring( Expression x, Expression from ) Create an expression for substring extraction. Extracts a substring starting at the specified position through to end of the string. First position is 1. Parameters: x

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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