[jboss-dev-forums] [Design the new POJO MicroContainer] - Re: How to reliably determine if BeanMetaData contains depen

[kabir.khan@jboss.com]

https://jira.jboss.org/jira/browse/JBMICROCONT-407
After talking to Ales I have come up with a new version of the visitor

  |    private boolean hasInjectedBeans(BeanMetaData beanMetaData)
  |    {
  |       DependencyMetaDataVisitor visitor = new DependencyMetaDataVisitor(beanMetaData);
  |       List<ValueMetaData> dependencies = visitor.getDependencies();
  |       
  |       for (ValueMetaData dep : dependencies)
  |       {
  |          //Ignore the dependencies from the kernel objects
  |          if(!((String)dep.getUnderlyingValue()).startsWith("jboss.kernel:service="))
  |          {
  |             return true;
  |          }
  |       }
  |       return false;
  |    }
  |    
  |    private static class DependencyMetaDataVisitor extends JBossObject implements MetaDataVisitor
  |    {
  |       MetaDataVisitorNode node;
  |       List<ValueMetaData> dependencies = new ArrayList<ValueMetaData>();
  |       protected Stack<MetaDataVisitorNode> visitorNodeStack = new Stack<MetaDataVisitorNode>();
  |       
  |       public DependencyMetaDataVisitor(MetaDataVisitorNode node)
  |       {
  |          this.node = node;
  |          describeVisit(node);
  |       }
  |       
  |       public List<ValueMetaData> getDependencies()
  |       {
  |          return dependencies;
  |       }
  |       
  |       public void addDependency(DependencyItem dependency)
  |       {
  |       }
  | 
  |       public <T> void addInstallCallback(CallbackItem<T> callback)
  |       {
  |       }
  | 
  |       public <T> void addUninstallCallback(CallbackItem<T> callback)
  |       {
  |       }
  | 
  |       public ControllerState getContextState()
  |       {
  |          return null;
  |       }
  | 
  |       public KernelControllerContext getControllerContext()
  |       {
  |          return null;
  |       }
  | 
  |       public void initialVisit(MetaDataVisitorNode node)
  |       {
  |          throw new NotImplementedException("Not implemented");
  |       }
  | 
  |       public void describeVisit(MetaDataVisitorNode node)
  |       {
  |          visitorNodeStack.push(node);
  |          try
  |          {
  |             internalDescribeVisit(node);
  |          }
  |          finally
  |          {
  |             visitorNodeStack.pop();
  |          }
  |       }
  |       
  |       private void internalDescribeVisit(MetaDataVisitorNode node)
  |       {
  |          if (node instanceof AbstractDependencyValueMetaData)
  |          {
  |             dependencies.add((AbstractDependencyValueMetaData)node);
  |          }
  |          Iterator<? extends MetaDataVisitorNode> children = node.getChildren();
  |          if (children != null)
  |          {
  |             while (children.hasNext())
  |             {
  |                MetaDataVisitorNode child = children.next();
  |                child.describeVisit(this);
  |             }
  |          }
  |       }
  | 
  |       public void setContextState(ControllerState contextState)
  |       {
  |       }
  | 
  |       public Stack<MetaDataVisitorNode> visitorNodeStack()
  |       {
  |          return visitorNodeStack;
  |       }
  |       
  |    }
  | 

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