--- /dev/null
+/*
+ * 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.List;
+
+import org.wamblee.system.core.SystemAssemblyException;
+import org.wamblee.system.graph.Edge;
+import org.wamblee.system.graph.Graph;
+import org.wamblee.system.graph.Node;
+import org.wamblee.system.graph.Visitor;
+
+/**
+ * Visitor that checks externally provided
+ * <ul>
+ * <li>
+ * </ul>
+ *
+ * @author Erik Brakkee
+ *
+ */
+public class CheckExternallyProvidedVisitor implements Visitor {
+
+ private Graph _graph;
+
+ public CheckExternallyProvidedVisitor(Graph aGraph) {
+ _graph = aGraph;
+ }
+
+ @Override
+ public void visitEdge(Edge aEdge) {
+ // Empty.
+ }
+
+ @Override
+ public void visitNode(Node aNode) {
+ if ( aNode instanceof ExternalProvidedInterfaceNode) {
+ ExternalProvidedInterfaceNode provided = (ExternalProvidedInterfaceNode) aNode;
+ List<Edge> edges = _graph.findOutgoing(provided);
+ if ( edges.size() > 2 ) {
+ createDuplicateException("External provided interfaces has multiple internal matches", aNode, edges);
+ }
+ if ( edges.size() == 0 ) {
+ throw new SystemAssemblyException(aNode + ": external provded interface is not provided by any of the internal components");
+ }
+ }
+ }
+
+ private void createDuplicateException(String aMsg, Node aNode, List<Edge> edges) {
+ StringBuffer buf = new StringBuffer();
+ buf.append(aNode
+ + ": " + aMsg + ": ");
+ for (Edge edge : edges) {
+ buf.append(edge.getTo() + "/ ");
+ }
+ throw new SystemAssemblyException(buf.toString());
+ }
+
+}