Map<String, Object> params = context.getParameters();
Attributes a = new Attributes();
Object value = params.get("nameValue");
a.addDefaultToEmpty("name", params.get("name"))
.addIfExists("size", params.get("size"))
.addIfExists("value", value, false)
.addIfTrue("disabled", params.get("disabled"))
.addIfTrue("readonly", params.get("readonly"))
.addIfTrue("multiple", params.get("multiple"))