2 * Copyright 2008 the original author or authors.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 package org.wamblee.system.graph.component;
18 import org.wamblee.system.graph.DefaultEdge;
19 import org.wamblee.system.graph.Edge;
20 import org.wamblee.system.graph.EdgeFactory;
21 import org.wamblee.system.graph.Node;
23 import java.util.ArrayList;
24 import java.util.List;
28 * Factory that creates edges between required and provided interfaces.
29 * Speciflcally it creates:
31 * <li>Edges between provided and required interfaces of a
33 * <li>Edges between required and externally required interfaces</li>
34 * <li>Edges between externally provided and provided interfaces.
37 * @author Erik Brakkee
39 public class RequiredProvidedEdgeFactory implements EdgeFactory {
41 * Creates a new RequiredProvidedEdgeFactory object.
43 public RequiredProvidedEdgeFactory() {
50 * @param aFrom DOCUMENT ME!
51 * @param aTo DOCUMENT ME!
53 * @return DOCUMENT ME!
56 public List<Edge> create(Node aFrom, Node aTo) {
57 List<Edge> result = new ArrayList<Edge>();
59 if (aFrom instanceof RequiredInterfaceNode) {
60 RequiredInterfaceNode required = (RequiredInterfaceNode) aFrom;
62 if (aTo instanceof ProvidedInterfaceNode) {
63 ProvidedInterfaceNode provided = (ProvidedInterfaceNode) aTo;
65 if (required.getRequired().implementedBy(provided.getProvided())) {
66 result.add(new DefaultEdge(required, provided));
68 } else if (aTo instanceof ExternalRequiredInterfaceNode) {
69 ExternalRequiredInterfaceNode external = (ExternalRequiredInterfaceNode) aTo;
71 if (external.getRequired().covers(required.getRequired())) {
72 result.add(new DefaultEdge(required, external));
75 } else if (aFrom instanceof ProvidedInterfaceNode) {
76 ProvidedInterfaceNode provided = (ProvidedInterfaceNode) aFrom;
78 if (aTo instanceof ExternalProvidedInterfaceNode) {
79 ExternalProvidedInterfaceNode external = (ExternalProvidedInterfaceNode) aTo;
81 if (provided.getProvided().covers(external.getProvided())) {
82 result.add(new DefaultEdge(external, provided));