About boolean

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getRollbackOnly()

Method javax.persistence.EntityTransaction boolean getRollbackOnly() Determine whether the current resource transaction has been marked for rollback. Returns: boolean indicating whether the transaction has been marked for rollback Throws: IllegalStateException - if isActive() is false Since: JPA 1.0
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hasSingleIdAttribute()

Method javax.persistence.metamodel.IdentifiableType boolean hasSingleIdAttribute() Whether the identifiable type has a single id attribute. Returns true for a simple id or embedded id; returns false for an idclass. Returns: boolean indicating whether the identifiable type has a single id attribute Since: JPA 2.0
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hasVersionAttribute()

Method javax.persistence.metamodel.IdentifiableType boolean hasVersionAttribute() Whether the identifiable type has a version attribute. Returns: boolean indicating whether the identifiable type has a version attribute Since: JPA 2.0
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having(restriction)

Method javax.persistence.criteria.AbstractQuery AbstractQuery having(   Expression<Boolean> restriction ) Specify a restriction over the groups of the query. Replaces the previous having restriction(s), if any. Parameters: restriction - a simple or compound boolean expression Returns: the modified query Since: JPA 2.0
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having(restriction)

Method javax.persistence.criteria.CriteriaQuery CriteriaQuery having(   Expression<Boolean> restriction ) Specify a restriction over the groups of the query. Replaces the previous having ... . Parameters: restriction - a simple or compound boolean expression Returns: the modified query Since: JPA 2.0
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having(restriction)

Method javax.persistence.criteria.Subquery Subquery having(   Expression<Boolean> restriction ) Specify a restriction over the groups of the subquery. Replaces the previous having restriction(s ... . Parameters: restriction - a simple or compound boolean expression Returns: the modified subquery Since: JPA 2.0
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isActive()

Method javax.persistence.EntityTransaction boolean isActive() Indicate whether a resource transaction is in progress. Returns: boolean indicating whether transaction is in progress Throws: PersistenceException - if an unexpected error condition is encountered Since: JPA 1.0
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isAscending()

Method javax.persistence.criteria.Order boolean isAscending() Whether ascending ordering is in effect. Returns: boolean indicating whether ordering is ascending Since: JPA 2.0
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isAssociation()

Method javax.persistence.metamodel.Attribute boolean isAssociation() Is the attribute an association. Returns: boolean indicating whether the attribute corresponds to an association Since: JPA 2.0
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isCollection()

Method javax.persistence.metamodel.Attribute boolean isCollection() Is the attribute collection-valued (represents a Collection, Set, List, or Map). Returns: boolean indicating whether the attribute is collection-valued Since: JPA 2.0