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/*******************************************************************************
* Copyright (c) 2003, 2006 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.osgi.framework.adaptor;
import java.io.IOException;
/**
* Permission Storage interface for managing a persistent storage of
* bundle permissions.
*
* <p>This class is used to provide methods to manage
* persistent storage of bundle permissions. The PermissionStorage object
* is returned by the FrameworkAdaptor object and is called
* to persistently store bundle permissions.
*
* <p>The permission data will typically take the form of encoded
* <tt>PermissionInfo</tt> Strings.
* See org.osgi.service.permissionadmin.PermissionInfo.
*
* <p>For example
* <pre>
* PermissionStorage storage = adaptor.getPermissionStorage();
* try {
* storage.setPermissionData(location, permissions);
* } catch (IOException e) {
* // Take some error action.
* }
* </pre>
* <p>
* Clients may implement this interface.
* </p>
* @since 3.1
*/
public interface PermissionStorage {
/**
* Returns the locations that have permission data assigned to them,
* that is, locations for which permission data
* exists in persistent storage.
*
* @return The locations that have permission data in
* persistent storage, or <tt>null</tt> if there is no permission data
* in persistent storage.
* @throws IOException If a failure occurs accessing persistent storage.
*/
public String[] getLocations() throws IOException;
/**
* Gets the permission data assigned to the specified
* location.
*
* @param location The location whose permission data is to
* be returned.
* The location can be <tt>null</tt> for the default permission data.
*
* @return The permission data assigned to the specified
* location, or <tt>null</tt> if that location has not been assigned any
* permission data.
* @throws IOException If a failure occurs accessing persistent storage.
*/
public String[] getPermissionData(String location) throws IOException;
/**
* Assigns the specified permission data to the specified
* location.
*
* @param location The location that will be assigned the
* permissions.
* The location can be <tt>null</tt> for the default permission data.
* @param data The permission data to be assigned, or <tt>null</tt>
* if the specified location is to be removed from persistent storaqe.
* @throws IOException If a failure occurs modifying persistent storage.
*/
public void setPermissionData(String location, String[] data) throws IOException;
/**
* Persists the array of encoded ConditionalPermissionInfo strings
* @param infos an array of encoded ConditionalPermissionInfo strings
* @throws IOException If a failure occurs modifying persistent storage.
* @since 3.2
*/
public void saveConditionalPermissionInfos(String[] infos) throws IOException;
/**
* Returns the persistent array of encoded ConditionalPermissionInfo strings
* @return an array of encoded ConditionalPermissionInfo strings or null
* if none exist in persistent storage.
* @throws IOException If a failure occurs accessing persistent storage.
* @since 3.2
*/
public String[] getConditionalPermissionInfos() throws IOException;
}
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