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/*******************************************************************************
* Copyright (c) 2011, 2013 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 org.eclipse.tcf.te.runtime.interfaces.extensions.IExecutableExtension;
/**
* Interface to be implemented by persistence delegates.
*/
public interface IPersistenceDelegate extends IExecutableExtension {
/**
* Writes the given context to the given persistence container.
* If the container does not exist yet, the class needs to be given.
*
* @param context The context to persist. Must not be <code>null</code>.
* @param container The persistence container or class for a new one. Must not be <code>null</code>.
*
* @return The new or updated container instance.
*/
public Object write(Object context, Object container) throws IOException;
/**
* Writes the given list of context objects to the given persistence container.
* If the container does not exist yet, the class needs to be given.
*
* @param context The list of contexts to persist. Must not be <code>null</code>.
* @param container The persistence container or class for a new one. Must not be <code>null</code>.
*
* @return The new or updated container instance.
*/
public Object writeList(Object[] context, Object container) throws IOException;
/**
* Get the class or interface for the context.
*
* @param context The context to persist. Must not be <code>null</code>.
* @return The class or interface for the given context.
*/
public Class<?> getPersistedClass(Object context);
/**
* Reads the context from the given persistence container.
* If the context does not exist yet, the class needs to be given.
*
* @param context The context to update or class for a new context or <code>null</code>.
* @param container The persistence container. Must not be <code>null</code>.
*
* @return The new or updated context instance.
*/
public Object read(Object context, Object container) throws IOException;
/**
* Reads a list of context objects from the given persistence container.
*
* @param contextClass The class type of the context objects to read or <code>null</code>.
* @param container The persistence container. Must not be <code>null</code>.
*
* @return The list of context objects. Might be empty.
*/
public Object[] readList(Class<?> contextClass, Object container) throws IOException;
/**
* Deletes the given context inside the container or the whole container.
*
* @param context The context to delete inside the storage or <code>null</code>.
* @param container The persistence container. Must not be <code>null</code>.
*
* @return <code>True</code> if the persistence context or the whole storage was successfully deleted;
* <code>false</code> otherwise.
*/
public boolean delete(Object context, Object container) throws IOException;
}
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