public GBeanSection(JAXBElement plan,
    List gbeans,
    Composite parent,
    FormToolkit toolkit,
    int style) 
{
        super(plan, parent, toolkit, style);
        this.objectContainer = gbeans;
        createClient();
}

 protected  void activateAddButton() 
{
        if (tree.getSelectionCount() == 0 || tree.getSelection()[0].getParentItem() == null) {
            addButton.setEnabled(true);
        } else {
            addButton.setEnabled(false);
        }
}

 public ITreeContentProvider getContentProvider() 
{
        return new ContentProvider() {
            @Override
            public Object[] getElements(Object inputElement) {
                return getChildren(inputElement);
            }
            @Override
            public Object[] getChildren(Object parentElement) {
                if (List.class.isInstance(parentElement)) {
                    return ((List)parentElement).toArray();
                }
                if (JAXBElement.class.isInstance(parentElement)) {
                    Object object = ((JAXBElement)parentElement).getValue();
                    if (GbeanType.class.isInstance(object)) {
                    	GbeanType gbean = (GbeanType)object;
                        return gbean.getAttributeOrXmlAttributeOrReference().toArray();
                    }
                }
                return new String[] {};
            }
        };
}

 public String getDescription() 
{
        return CommonMessages.editorSectionGBeanDescription;
}

 public Object getInput() 
{
        if (objectContainer != null) {
            return objectContainer;
        }
        return super.getInput();
}

 public ILabelProvider getLabelProvider() 
{
        return new LabelProvider() {
            @Override
            public String getText(Object element) {
                if (JAXBElement.class.isInstance(element)) {
                    Object object = ((JAXBElement)element).getValue();
                    if (GbeanType.class.isInstance(object)) {
                    	GbeanType gbean = (GbeanType)object;
                        return "GBean: name = \"" + gbean.getName() +
                                "\", class = \"" + gbean.getClazz() + "\"";
                    }
                    else if (AttributeType.class.isInstance(object)) {
                    	AttributeType attribute = (AttributeType)object;
                        return "Attribute: name = \"" + attribute.getName() + 
                                "\", type = \"" + attribute.getType() + 
                                "\", value = \"" + attribute.getValue() + "\"";
                    }
                    else if (PatternType.class.isInstance(object)) {
                    	PatternType dependency = (PatternType)object;
                        return "Dependency: group = \"" + dependency.getGroupId() +
                                "\", artifact = \"" + dependency.getArtifactId() +
                                "\", version = \"" + dependency.getVersion() +
                                "\", module = \"" + dependency.getModule() +
                                "\", type = \"" + dependency.getType() +
                                "\", custom name = \"" + dependency.getCustomFoo() + "\"";
                    }
                    else if (ReferenceType.class.isInstance(object)) {
                    	ReferenceType reference = (ReferenceType)object;
                        return "Reference: name = \"" + reference.getName() +
                                "\", group = \"" + reference.getGroupId() +
                                "\", artifact = \"" + reference.getArtifactId() +
                                "\", version = \"" + reference.getVersion() +
                                "\", module = \"" + reference.getModule() +
                                "\", type = \"" + reference.getType() +
                                "\", custom name = \"" + reference.getCustomFoo() + "\"";
                    }
                }
                return null;
            }
            @Override
            public Image getImage(Object arg0) {
                return Activator.imageDescriptorFromPlugin("org.eclipse.jst.j2ee",
                        "icons/full/obj16/accessbean_obj.gif").createImage();
            }
        };
}

 public GbeanType getSelectedObject() 
{
        if (tree.getSelection().length == 0) {
            return null;
        }
        return (GbeanType)((JAXBElement)tree.getSelection()[0].getData()).getValue();
}

 public Class getTableEntryObjectType() 
{
        return GbeanType.class;
}

 public String getTitle() 
{
        return CommonMessages.editorSectionGBeanTitle;
}

 public Wizard getWizard() 
{
        return new GBeanWizard(this);
}

 public  void removeItem(Object anItem) 
{
        JAXBElement element =(JAXBElement)tree.getSelection()[0].getData(); 
        Object object = element.getValue();
        if (GbeanType.class.isInstance(object)) {
            objectContainer.remove(anItem);
        }
        else {
        	GbeanType gbean = (GbeanType)((JAXBElement)tree.getSelection()[0].getParentItem().getData()).getValue();
            gbean.getAttributeOrXmlAttributeOrReference().remove(element);
        }
}