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/*******************************************************************************
* Copyright (c) 2010-2016, Abel Hegedus, IncQuery Labs Ltd.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-v20.html.
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package tools.refinery.viatra.runtime.registry;
/**
* A registry source connector can provide query specifications to listeners (e.g. {@link IQuerySpecificationRegistry}).
* The connector interface does not support direct access to query specifications, instead it sends existing specifications
* to listeners on addition and sends notifications to listeners when a change occurs in the set of specifications.
*
* @author Abel Hegedus
* @since 1.3
*
*/
public interface IRegistrySourceConnector {
/**
* The connector must return the same identifier every time it is invoked!
*
* @return unique identifier of the connector
*/
String getIdentifier();
/**
*
* @return true if the specifications of the connector should be included in default views
*/
boolean includeSpecificationsInDefaultViews();
/**
* Add a listener to get updates on changes in the query specifications available from the connector. When the
* listener is added, the connector is expected to call the listener with each existing query specification.
*
* @param listener that should be added
*/
void addListener(IConnectorListener listener);
/**
* Removes an already registered listener and stops sending updates. The connector is not required to send any
* updates before returning from this method, but should not send any events after this method returns.
*
* @param listener that should be removed
*/
void removeListener(IConnectorListener listener);
}
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