How to specify the trayno programatically in Java

[sksundaramoorthy]

Have built a tray element programmatically and passed the same configuration to the CUPS API. However, I'm having trouble getting the lotsheet printer to recognize this tray element, which always picks up the paper from the default tray instead.

Attrunutes are below.

StringBuilder attributeString = new StringBuilder();
attributeString.append("fitplot:boolean:true");
attributeString.append("#");
attributeString.append("multiple-document-handling:keyword:separate-documents-collated-copies");

if (StringUtils.isNotBlank(trayAttribute)) {
attributeString.append("#");
attributeString.append("media:keyword:");
attributeString.append(trayAttribute);
}

Also tried with below attributes.
//attributeMap.put("job-attributes", "media=A4 -o InputSlot=Tray2");
//attributeMap.put("job-attributes", "media=A4 -o InputSlot=Tray-2");
//attributeMap.put("job-attributes", "media=A4 -o InputSlot=Tray 2");
//attributeMap.put("job-attributes", "InputSlot=Tray 2");

Please let me know the correct approach.