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/*******************************************************************************
* Copyright (c) 2011 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.service.resolver;
/**
* A state wire represents a decision made by a resolver to wire a requirement to a capability.
* There are 4 parts to a state wire.
* <ul>
* <li>The requirement which may have been specified by a host bundle or one of its attached fragments.</li>
* <li>The host bundle which is associated with the requirement. There are cases where the host
* bundle may not be the same as the bundle which declared the requirement. For example, if a fragment
* specifies additional requirements.</li>
* <li>The capability which may have been specified by a host bundle or one of its attached fragments.</li>
* <li>The host bundle which is associated with the capability. There are cases where the host
* bundle may not be the same as the bundle which declared the capability. For example, if a fragment
* specifies additional capabilities.</li>
* </ul>
* @since 3.7
*/
public class StateWire {
private final BundleDescription requirementHost;
private final VersionConstraint declaredRequirement;
private final BundleDescription capabilityHost;
private final BaseDescription declaredCapability;
/**
* Constructs a new state wire.
* @param requirementHost the bundle hosting the requirement.
* @param declaredRequirement the declared requirement. The bundle declaring the requirement may be different from the requirement host.
* @param capabilityHost the bundle hosting the capability.
* @param declaredCapability the declared capability. The bundle declaring the capability may be different from the capability host.
*/
public StateWire(BundleDescription requirementHost, VersionConstraint declaredRequirement, BundleDescription capabilityHost, BaseDescription declaredCapability) {
super();
this.requirementHost = requirementHost;
this.declaredRequirement = declaredRequirement;
this.capabilityHost = capabilityHost;
this.declaredCapability = declaredCapability;
}
/**
* Gets the requirement host.
* @return the requirement host.
*/
public BundleDescription getRequirementHost() {
return requirementHost;
}
/**
* Gets the declared requirement.
* @return the declared requirement.
*/
public VersionConstraint getDeclaredRequirement() {
return declaredRequirement;
}
/**
* gets the capability host.
* @return the capability host.
*/
public BundleDescription getCapabilityHost() {
return capabilityHost;
}
/**
* gets the declared capability.
* @return the declared capability.
*/
public BaseDescription getDeclaredCapability() {
return declaredCapability;
}
}
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