/**
* This file is part of CloudML [ http://cloudml.org ]
*
* Copyright (C) 2012 - SINTEF ICT
* Contact: Franck Chauvel <franck.chauvel@sintef.no>
*
* Module: root
*
* CloudML is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* CloudML is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with CloudML. If not, see
* <http://www.gnu.org/licenses/>.
*/
package org.cloudml.indicators;
import static eu.diversify.trio.core.requirements.Factory.*;
import eu.diversify.trio.core.requirements.Requirement;
import org.cloudml.core.ComponentInstance;
import org.cloudml.core.InternalComponentInstance;
import org.cloudml.core.RequiredPortInstance;
/**
* Extract the explicit requirements/dependencies of a given component.
*
* The resulting requirement capture the actual dependencies of the given
* component. Alternative dependencies (possible relationship or executeOn) are
* not taken into account.
*/
public class OnlyExplicitDependencies implements DependencyExtractor {
@Override
public Requirement from(ComponentInstance<?> instance) {
requireValidComponent(instance);
Requirement requirements = nothing();
if (instance.isInternal()) {
final InternalComponentInstance internalInstance = instance.asInternal();
for (RequiredPortInstance eachDependency: internalInstance.getRequiredPorts()) {
if (eachDependency.isBound()) {
requirements = requirements.and(require(eachDependency.findProvider().getName()));
}
}
requirements = requirements.and(require(internalInstance.getHost().getName()));
}
return requirements;
}
private void requireValidComponent(ComponentInstance<?> componentInstance) throws IllegalArgumentException {
if (componentInstance == null) {
throw new IllegalArgumentException("Cannot extract the dependencies of 'null'");
}
}
}