populating the dropdown fields based on other dropdown fields

Hi experts,

I have requirement to populate the dropdown field based on other dropdown field for this i followed below steps

As two fields coming from different context nodes.

1. attached event to the 1st attribute at get_p level to read the dropdown filed of attribute1

2.created attribute of type static in implementation class to read the dropdown field (attribute 1)

Now i want to read or filter the dropdown(attribute2) based on the attribute1 and populate the fields based the custom attribute as it holds the field of attribute1.

Please help me on this.

Thanks.