edu.umd.cs.psl.model.atom

Interface AtomManager

All Known Implementing Classes:

AtomEventFramework, PersistedAtomManager, SimpleAtomManager, TrainingMap

public interface AtomManager

Provides centralization and hooks for managing the GroundAtoms that are instantiated from a Database.

By wrapping Database.getAtom(Predicate, GroundTerm...), an AtomManager gives additional control over the GroundAtoms that come from that Database.

Additionally, AtomManagers can support other functionality that might require coordination by providing a single component to call to carry out tasks.

An AtomManager should be initialized with the Database for which it is managing Atoms.

Method Summary

Methods

Modifier and Type	Method and Description
ResultList	executeQuery(DatabaseQuery query) Calls Database.executeQuery(DatabaseQuery) on the encapsulated Database.
GroundAtom	getAtom(Predicate p, GroundTerm... arguments) Returns the GroundAtom for the given Predicate and GroundTerms.
boolean	isClosed(StandardPredicate predicate) Calls Database.isClosed(StandardPredicate) on the encapsulated Database.

Method Detail

getAtom

GroundAtom getAtom(Predicate p,
                 GroundTerm... arguments)

Returns the GroundAtom for the given Predicate and GroundTerms.

This method must call Database.getAtom(Predicate, GroundTerm...) to actually retrieve the GroundAtom.

Parameters:

p - the Predicate of the Atom

arguments - the GroundTerms of the Atom

Returns:

the Atom

executeQuery

ResultList executeQuery(DatabaseQuery query)

Calls Database.executeQuery(DatabaseQuery) on the encapsulated Database.

Parameters:

query - the query to execute

Returns:

the query results exactly as returned by the Database

isClosed

boolean isClosed(StandardPredicate predicate)

Calls Database.isClosed(StandardPredicate) on the encapsulated Database.

Parameters:

predicate - the predicate to check

Returns:

TRUE if predicate is closed in the Database