/*
* CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
 * or http://forgerock.org/license/CDDLv1.0.html.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at legal-notices/CDDLv1_0.txt.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information:
 *      Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 *
 *      Copyright 2008-2009 Sun Microsystems, Inc.
 *      Portions Copyright 2013-2014 ForgeRock AS.
 */
package org.forgerock.opendj.server.core;

import java.util.Set;

import org.forgerock.opendj.ldap.DN;
import org.forgerock.opendj.ldap.Entry;
import org.forgerock.opendj.ldap.LdapException;
import org.forgerock.opendj.ldap.RequestHandler;

/**
 * A connection to a data provider. When a connection is no longer needed it
 * must be closed.
 */
public interface DataProviderConnection extends RequestHandler<Operation> {

    /**
     * Closes this data provider connection. When this method returns the
     * connection can no longer be used.
     */
    void close();

    /**
     * Indicates whether the underlying data provider contains the specified
     * entry.
     *
     * @param dn
     *            The DN of the entry.
     * @return {@code true} if the underlying data provider contains the
     *         specified entry, or {@code false} if it does not.
     * @throws LdapException
     *             If a problem occurs while trying to make the determination,
     *             or if {@code dn} is not a DN equal to or subordinate to one
     *             of the base DNs managed by the underlying data provider.
     */
    boolean containsEntry(DN dn) throws LdapException;

    /**
     * Deregisters an event listener from the underlying data provider.
     *
     * @param listener
     *            The event listener.
     */
    void deregisterEventListener(DataProviderEventListener listener);

    /**
     * Returns an unmodifiable set containing the base DNs of the sub-trees
     * which the underlying data provider contains.
     *
     * @return An unmodifiable set containing the base DNs of the sub-trees
     *         which the underlying data provider contains.
     */
    Set<DN> getBaseDNs();

    /**
     * Retrieves the specified entry from the underlying data provider.
     *
     * @param dn
     *            The DN of the entry.
     * @return The requested entry, or {@code null} if the underlying data
     *         provider does not contain the specified entry.
     * @throws LdapException
     *             If a problem occurs while trying to retrieve the entry, or if
     *             {@code dn} is not a DN equal to or subordinate to one of the
     *             base DNs managed by the underlying data provider.
     */
    Entry getEntry(DN dn) throws LdapException;

    /**
     * Returns the current status of the provided base DN in the underlying data
     * provider.
     *
     * @param baseDN
     *            The base DN in the underlying data provider.
     * @return The current status of the provided base DN in the underlying data
     *         provider.
     * @throws LdapException
     *             If {@code baseDN} is not one of the base DNs managed by the
     *             underlying data provider.
     */
    DataProviderStatus getStatus(DN baseDN) throws LdapException;

    /**
     * Returns an unmodifiable set containing the OIDs of the controls that may
     * be supported by the provided base DN in the underlying data provider.
     *
     * @param baseDN
     *            The base DN in the underlying data provider.
     * @return An unmodifiable set containing the OIDs of the controls that may
     *         be supported by the provided base DN in the underlying data
     *         provider.
     * @throws LdapException
     *             If {@code baseDN} is not one of the base DNs managed by the
     *             underlying data provider.
     */
    Set<String> getSupportedControls(DN baseDN) throws LdapException;

    /**
     * Returns an unmodifiable set containing the OIDs of the features that may
     * be supported by the provided base DN in the underlying data provider.
     *
     * @param baseDN
     *            The base DN in the underlying data provider.
     * @return An unmodifiable set containing the OIDs of the features that may
     *         be supported by the provided base DN in the underlying data
     *         provider.
     * @throws LdapException
     *             If {@code baseDN} is not one of the base DNs managed by the
     *             underlying data provider.
     */
    Set<String> getSupportedFeatures(DN baseDN) throws LdapException;

    /**
     * Registers an event listener with the underlying data provider.
     *
     * @param listener
     *            The event listener.
     */
    void registerEventListener(DataProviderEventListener listener);

    /**
     * Indicates whether or not the provided base DN in the underlying data
     * provider supports change notification.
     *
     * @param baseDN
     *            The base DN in the underlying data provider.
     * @return {@code true} if the provided base DN in the underlying data
     *         provider supports change notification.
     * @throws LdapException
     *             If {@code baseDN} is not one of the base DNs managed by the
     *             underlying data provider.
     */
    boolean supportsChangeNotification(DN baseDN) throws LdapException;
}