/*
- * Copyright 2008 the original author or authors.
+ * Copyright 2005-2010 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.
*/
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;
+import java.util.List;
+
/**
* Visitor that checks whether required and provided interfaces are matched
* appropriately:
* <ul>
- * <li>Each required interface is connected to at most one provided interface
- * </li>
+ * <li>Each required interface is connected to at most one provided interface</li>
* <li>Required interfaces that are not optional must be connected to precisely
* one provided interface</li>
* </ul>
*
* @author Erik Brakkee
- *
*/
public class CheckRequiredProvidedMultiplicityVisitor implements Visitor {
+ private Graph graph;
- private Graph _graph;
-
+ /**
+ * Creates a new CheckRequiredProvidedMultiplicityVisitor object.
+ *
+ */
public CheckRequiredProvidedMultiplicityVisitor(Graph aGraph) {
- _graph = aGraph;
+ graph = aGraph;
}
@Override
public void visitNode(Node aNode) {
if (aNode instanceof RequiredInterfaceNode) {
RequiredInterfaceNode required = (RequiredInterfaceNode) aNode;
- List<Edge> edges = _graph.findOutgoing(aNode);
+ List<Edge> edges = graph.findOutgoing(aNode);
+
if (edges.size() > 1) {
- createDuplicateException("Multiple providers of required interface found", aNode, edges);
+ createDuplicateException(
+ "Multiple providers of required interface found", aNode,
+ edges);
}
- if (edges.size() == 0 && !required.getRequired().isOptional()) {
+
+ if ((edges.size() == 0) && !required.getRequired().isOptional()) {
throw new SystemAssemblyException(
- aNode
- + ": mandatpory required interface not provided by other components started earlier");
+ aNode +
+ ": mandatpory required interface not provided by other components started earlier");
}
- } else if ( aNode instanceof ExternalProvidedInterfaceNode) {
- List<Edge> edges = _graph.findOutgoing(aNode);
- if ( edges.size() > 1) {
- createDuplicateException("multiple internal matches for externally provided interface", aNode, edges);
+ } else if (aNode instanceof ExternalProvidedInterfaceNode) {
+ List<Edge> edges = graph.findOutgoing(aNode);
+
+ if (edges.size() > 1) {
+ createDuplicateException(
+ "multiple internal matches for externally provided interface",
+ aNode, edges);
}
- if ( edges.size() == 0 ) {
- throw new SystemAssemblyException(aNode + ": external provided interface is not provided internally");
+
+ if (edges.size() == 0) {
+ throw new SystemAssemblyException(aNode +
+ ": external provided interface is not provided internally");
}
}
}
- private void createDuplicateException(String aMsg, Node aNode, List<Edge> edges) {
+ private void createDuplicateException(String aMsg, Node aNode,
+ List<Edge> aEdges) {
StringBuffer buf = new StringBuffer();
- buf.append(aNode
- + ": " + aMsg + ": ");
- for (Edge edge : edges) {
+ buf.append(aNode + ": " + aMsg + ": ");
+
+ for (Edge edge : aEdges) {
buf.append(edge.getTo() + "/ ");
}
+
throw new SystemAssemblyException(buf.toString());
}
-
}