combobox items filter controller

Hello,

I have created the following combobox in an xml view:

<ComboBoxid="categoryComboBox"items="{path:'categoryModel>/category', filters: { path: 'Context', operator: 'EQ', value1: 'CASE' } }"selectedKey="{newCase>/CATEGORY_ID}">

<core:Itemid="categoryComboBoxItem"key="{categoryModel>CategoryId}"text="{path:'categoryModel>', formatter:'tl.ibp.ct.alert.monitor.utils.Utils.formatCategory'}"/>

</ComboBox>

now I need to create the same, but in the controller, I don't know how to apply the filter filters: { path: 'Context', operator: 'EQ', value1: 'CASE' } .

var categoryModel = this.getView().getModel("categoryModel");

var categoryComboBox = new sap.m.ComboBox("ComboBoxID");

categoryComboBox.setModel(categoryModel);

var oItemTemplate1 = new sap.ui.core.ListItem();

oItemTemplate1.bindProperty("text", "categoryModel>CategoryId");

categoryComboBox.bindItems("categoryModel>/category", oItemTemplate1);

I have tried the following:

var categoryItemsBinding = categoryComboBox.bindItems("categoryModel>/category", oItemTemplate1);

categoryItemsBinding.filter( new sap.ui.model.Filter({ path : "Context", operator : sap.ui.model.FilterOperator.EQ, value1 : "CASE" }));

but it didn't work.

any suggestions?

thanks.