根据某些条件在jstree的specfic节点上显示contextmenu

Question

	$scope.contextMenu = {
		

		"Export" : {
			"label" : "Export",
			"icon" : "glyphicon glyphicon-download-alt",
			"_class" : "contextMenuListClass",
			"action" : function(obj, data) {
				console.log(obj);

			}
		},
	
	};

<div class="tree-div" id='myTree' style="display: none;">

	<js-tree tree-plugins="contextmenu,wholerow,sort,search,types"
		tree-types="types" tree-contextmenu="contextMenu" tree-data="scope"
		tree-model="data" selected
		tree-events="dblclick:onTreeNodeDoubleClick"></js-tree>
</div>

我正在使用角度jsTree-directive。我的要求是首先在Jstree的特定节点上显示上下文菜单我检查所选节点上的条件，如果所选节点满足该条件，则上下文菜单将出现在该节点或上下文菜单上将不会显示该节点。