/*
- * 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.
* 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.ArrayList;
-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.ArrayList;
+import java.util.List;
+
/**
- * Checks whether the given component graph can be started in component
- * order without any missing dependencies.
+ * Checks whether the given component graph can be started in component order
+ * without any missing dependencies.
+ *
* @author Erik Brakkee
- *
*/
public class CheckStartupDependenciesVisitor implements Visitor {
-
- private Graph graph;
- private List<Node> available;
+ private Graph graph;
+
+ private List<Node> available;
/**
- * Constructs the visitor.
- * @param aGraph Graph.
+ * Constructs the visitor.
+ *
+ * @param aGraph
+ * Graph.
*/
- public CheckStartupDependenciesVisitor(Graph aGraph) {
- graph = aGraph;
+ public CheckStartupDependenciesVisitor(Graph aGraph) {
+ graph = aGraph;
available = new ArrayList<Node>();
}
@Override
public void visitNode(Node aNode) {
List<Edge> edges = graph.findOutgoing(aNode);
-
+
// check dependencies.
- for (Edge edge: edges) {
+ for (Edge edge : edges) {
Node dep = edge.getTo();
- if ( !available.contains(dep)) {
- throw new SystemAssemblyException(aNode + ": required dependency '" + dep + "' was not started");
+
+ if (!available.contains(dep)) {
+ throw new SystemAssemblyException(aNode +
+ ": required dependency '" + dep + "' was not started");
}
}
-
+
available.add(aNode);
}
-
}