/*
* Copyright 2008 the original author or authors.
*
* 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.wamblee.system.graph.component;
import java.util.ArrayList;
import java.util.List;
import org.wamblee.system.graph.DefaultEdge;
import org.wamblee.system.graph.Edge;
import org.wamblee.system.graph.EdgeFactory;
import org.wamblee.system.graph.Node;
/**
* Factory that creates edges between required and provided interfaces.
* Speciflcally it creates:
*
* - Edges between provided and required interfaces of a container.
* - Edges between required and externally required interfaces
* - Edges between externally provided and provided interfaces.
*
*
* @author Erik Brakkee
*
*/
public class RequiredProvidedEdgeFactory implements EdgeFactory {
public RequiredProvidedEdgeFactory() {
// Empty.
}
@Override
public List create(Node aFrom, Node aTo) {
List result = new ArrayList();
if (aFrom instanceof RequiredInterfaceNode) {
RequiredInterfaceNode required = (RequiredInterfaceNode) aFrom;
if (aTo instanceof ProvidedInterfaceNode) {
ProvidedInterfaceNode provided = (ProvidedInterfaceNode) aTo;
if (required.getRequired()
.implementedBy(provided.getProvided())) {
result.add(new DefaultEdge(required, provided));
}
} else if (aTo instanceof ExternalRequiredInterfaceNode) {
ExternalRequiredInterfaceNode external = (ExternalRequiredInterfaceNode) aTo;
if ( required.getRequired().equals(external.getRequired())) {
result.add(new DefaultEdge(required, external));
}
}
} else if ( aFrom instanceof ProvidedInterfaceNode) {
ProvidedInterfaceNode provided = (ProvidedInterfaceNode)aFrom;
if ( aTo instanceof ExternalProvidedInterfaceNode) {
ExternalProvidedInterfaceNode external = (ExternalProvidedInterfaceNode)aTo;
if ( provided.getProvided().equals(external.getProvided())) {
result.add(new DefaultEdge(external, provided));
}
}
}
return result;
}
}