wamblee.org Git - utils/blob - system/general/src/main/java/org/wamblee/system/graph/component/RequiredProvidedEdgeFactory.java

   1 /*
   2  * Copyright 2008 the original author or authors.
   3  *
   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
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  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.
  15  */
  16 package org.wamblee.system.graph.component;
  17
  18 import java.util.ArrayList;
  19 import java.util.List;
  20
  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;
  25
  26 /**
  27  * Factory that creates links between required and provided interfaces.
  28  *
  29  * @author Erik Brakkee
  30  *
  31  */
  32 public class RequiredProvidedEdgeFactory implements EdgeFactory {
  33
  34     public RequiredProvidedEdgeFactory() {
  35         // Empty.
  36     }
  37
  38     @Override
  39     public List<Edge> create(Node aFrom, Node aTo) {
  40         List<Edge> result = new ArrayList<Edge>();
  41         if (aFrom instanceof RequiredInterfaceNode) {
  42             RequiredInterfaceNode required = (RequiredInterfaceNode) aFrom;
  43             if (aTo instanceof ProvidedInterfaceNode) {
  44
  45                 ProvidedInterfaceNode provided = (ProvidedInterfaceNode) aTo;
  46                 if (required.getRequired()
  47                         .implementedBy(provided.getProvided())) {
  48                     result.add(new DefaultEdge(required, provided));
  49                 }
  50             } else if (aTo instanceof ExternalRequiredInterfaceNode) {
  51                 ExternalRequiredInterfaceNode external = (ExternalRequiredInterfaceNode) aTo;
  52                 if ( required.getRequired().equals(external.getRequired())) {
  53                     result.add(new DefaultEdge(required, external));
  54                 }
  55             }
  56         } else if ( aFrom instanceof ProvidedInterfaceNode) {
  57             ProvidedInterfaceNode provided = (ProvidedInterfaceNode)aFrom;
  58             if ( aTo instanceof ExternalProvidedInterfaceNode) {
  59                 ExternalProvidedInterfaceNode external = (ExternalProvidedInterfaceNode)aTo;
  60                 if ( provided.getProvided().equals(external.getProvided())) {
  61                     result.add(new DefaultEdge(external, provided));
  62                 }
  63             }
  64         }
  65         return result;
  66     }
  67
  68 }