Query package.
Class | Description |
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Predicate | Base class for native queries. |
Interface | Description |
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Candidate | candidate for com.db4o.query.Evaluation callbacks. During query execution all registered com.db4o.query.Evaluation callback handlers are called with com.db4o.query.Candidate proxies that represent the persistent objects that meet all other com.db4o.query.Query criteria. A com.db4o.query.Candidate provides access to the persistent object it represents and allows to specify, whether it is to be included in the com.db4o.ObjectSet resultset. |
Constraint | constraint to limit the objects returned upon query execution . Constraints are constructed by calling Query.constrain() . Constraints can be joined with the methods com.db4o.query.Constraint.And and com.db4o.query.Constraint.Or . The methods to modify the constraint evaluation algorithm may be merged, to construct combined evaluation rules. Examples:
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Constraints | set of com.db4o.query.Constraint objects. This extension of the com.db4o.query.Constraint interface allows setting the evaluation mode of all contained com.db4o.query.Constraint objects with single calls. See also com.db4o.query.Query.Constraints . |
Evaluation | for implementation of callback evaluations. |
Query | handle to a node in a S.O.D.A. |
QueryComparator | Comparator for sorting queries on JDKs where java.util.Comparator is not available. |
Delegate | Description |
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EvaluationDelegate |