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 java.util.ArrayList;
19 import java.util.List;
21 import org.wamblee.system.graph.DefaultEdge;
22 import org.wamblee.system.graph.Edge;
23 import org.wamblee.system.graph.EdgeFactory;
24 import org.wamblee.system.graph.Node;
27 * Factory that creates edges between required and provided interfaces.
28 * Speciflcally it creates:
30 * <li> Edges between provided and required interfaces of a container. </li>
31 * <li> Edges between required and externally required interfaces </li>
32 * <li> Edges between externally provided and provided interfaces.
35 * @author Erik Brakkee
38 public class RequiredProvidedEdgeFactory implements EdgeFactory {
40 public RequiredProvidedEdgeFactory() {
45 public List<Edge> create(Node aFrom, Node aTo) {
46 List<Edge> result = new ArrayList<Edge>();
47 if (aFrom instanceof RequiredInterfaceNode) {
48 RequiredInterfaceNode required = (RequiredInterfaceNode) aFrom;
49 if (aTo instanceof ProvidedInterfaceNode) {
51 ProvidedInterfaceNode provided = (ProvidedInterfaceNode) aTo;
52 if (required.getRequired()
53 .implementedBy(provided.getProvided())) {
54 result.add(new DefaultEdge(required, provided));
56 } else if (aTo instanceof ExternalRequiredInterfaceNode) {
57 ExternalRequiredInterfaceNode external = (ExternalRequiredInterfaceNode) aTo;
58 if ( required.getRequired().equals(external.getRequired())) {
59 result.add(new DefaultEdge(required, external));
62 } else if ( aFrom instanceof ProvidedInterfaceNode) {
63 ProvidedInterfaceNode provided = (ProvidedInterfaceNode)aFrom;
64 if ( aTo instanceof ExternalProvidedInterfaceNode) {
65 ExternalProvidedInterfaceNode external = (ExternalProvidedInterfaceNode)aTo;
66 if ( provided.getProvided().equals(external.getProvided())) {
67 result.add(new DefaultEdge(external, provided));