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/*
* Copyright (c) OSGi Alliance (2012, 2015). All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.osgi.service.resolver;
import org.osgi.annotation.versioning.ProviderType;
import org.osgi.resource.Capability;
import org.osgi.resource.Resource;
/**
* A capability hosted by a resource.
*
* <p>
* A HostedCapability is a Capability where the {@link #getResource()} method
* returns a Resource that hosts this Capability instead of declaring it. This
* is necessary for cases where the declaring Resource of a Capability does not
* match the runtime state. For example, this is the case for fragments attached
* to a host. Most fragment declared capabilities and requirements become hosted
* by the host resource. Since a fragment can attach to multiple hosts, a single
* capability can actually be hosted multiple times.
*
* @ThreadSafe
* @author $Id$
*/
@ProviderType
public interface HostedCapability extends Capability {
/**
* Return the Resource that hosts this Capability.
*
* @return The Resource that hosts this Capability.
*/
@Override
Resource getResource();
/**
* Return the Capability hosted by the Resource.
*
* @return The Capability hosted by the Resource.
*/
Capability getDeclaredCapability();
}
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