/*
- * 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.
import org.wamblee.system.core.ProvidedInterface;
import org.wamblee.system.core.SystemAssemblyException;
-import org.wamblee.system.graph.DefaultEdge;
import org.wamblee.system.graph.Edge;
import org.wamblee.system.graph.Node;
import org.wamblee.system.graph.Visitor;
/**
* Visitor that creates links between required and provided interfaces as
- * described by the edges in the graph.
+ * described by the edges in the graph. Specically it links together (1)
+ * required and provided interfaces of internal component of a container and (2)
+ * the providers of externally required interfaces and internal required
+ * interfaces.
*
* @author Erik Brakkee
- *
*/
public class LinkVisitor implements Visitor {
-
@Override
public void visitEdge(Edge aEdge) {
Node from = aEdge.getFrom();
Node to = aEdge.getTo();
+
if (from instanceof RequiredInterfaceNode) {
RequiredInterfaceNode required = (RequiredInterfaceNode) from;
- if (to instanceof ProvidedInterfaceNode) {
+ if (to instanceof ProvidedInterfaceNode) {
ProvidedInterfaceNode provided = (ProvidedInterfaceNode) to;
required.getRequired().setProvider(provided.getProvided());
-
} else if (to instanceof ExternalRequiredInterfaceNode) {
ExternalRequiredInterfaceNode external = (ExternalRequiredInterfaceNode) to;
ProvidedInterface provider = external.getRequired()
- .getProvider();
- if (provider == null && !required.getRequired().isOptional()) {
- throw new SystemAssemblyException("Mandatory interface '"
- + from + "' is not provided.");
+ .getProvider();
+
+ if ((provider == null) && !required.getRequired().isOptional()) {
+ throw new SystemAssemblyException("Mandatory interface '" +
+ from + "' is not provided.");
}
- if ( provider != null ) {
+
+ if (provider != null) {
required.getRequired().setProvider(provider);
}
}
public void visitNode(Node aNode) {
// Empty.
}
-
}