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/*******************************************************************************
* Copyright (c) 2011, 2012 Wind River Systems, Inc. and others. All rights reserved.
* This program and the accompanying materials are made available under the terms
* of the Eclipse Public License v1.0 which accompanies this distribution, and is
* available at http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.runtime.persistence.interfaces;
import java.io.IOException;
import java.net.URI;
import org.eclipse.tcf.te.runtime.services.interfaces.IService;
/**
* A service for persisting elements to a URI persistence store.
*/
public interface IURIPersistenceService extends IService {
/**
* Writes the given context object via a persistence delegate to a persistence storage.
* If the given URI is <code>null</code>, it will be determined by adapting the context
* to a {@link IPersistableURIProvider}
*
* @param context The context object. Must not be <code>null</code>.
* @param uri The URI or <code>null</code>.
*
* @throws IOException - if the operation fails.
*/
public void write(Object context, URI uri) throws IOException;
/**
* Reads a context object via a persistence delegate from a given persistence storage.
* If the given URI is <code>null</code>, it will be determined by adapting the context
* to a {@link IPersistableURIProvider}. In this case the context must not be <code>null</code>.
*
* @param context The context object or <code>null</code>.
* @param uri The URI. Must not be <code>null</code>.
*
* @throws IOException - if the operation fails
*/
public Object read(Object context, URI uri) throws IOException;
/**
* Deletes the persistence storage for the given context object via a persistence delegate.
* If the given URI is <code>null</code>, it will be determined by adapting the context
* to a {@link IPersistableURIProvider}
*
* @param context The context object. Must not be <code>null</code>.
* @param uri The URI or <code>null</code>.
*
* @return <code>True</code> if the persistence storage is successfully deleted;
* <code>false</code> otherwise.
*
* @throws IOException - if the operation fails
*/
public boolean delete(Object context, URI uri) throws IOException;
/**
* Returns the persistence storage URI for the given context object. The persistence delegate to
* use will be determined by adapting the given context object to an {@link IPersistable}.
*
* @param context The context object. Must not be <code>null</code>.
* @return The URI or <code>null</code>.
*
* @throws IOException - if the operation fails
*/
public URI getURI(Object context) throws IOException;
}
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