Java Parameter Map: Truncating '_RejMessage' Values

This code takes a parameter map as input and retrieves the value for a specific key '_RejMessage'. If the value is not null and not empty, and its length is greater than 128 characters, then it is truncated to the first 100 characters and trimmed. The updated value is then put back into the parameter map using the same key '_RejMessage'. The result is a parameter map with the same keys as the input, but with the value for the key '_RejMessage' possibly truncated and trimmed.