Programming-Techniques - ASSIGNMENT 5 - PROCESSING SENSOR DATA OF DAILY LIVING ACTIV- Solved

Consider designing, implementing and testing an application for analysing the behaviour of a person recorded by a set of sensors installed in its house. The historical log of the person’s activity is stored as tuples (start_time, end_time, activity_label), where start_time and end_time represent the date and time when each activity has started and ended while the activity label represents the type of activity performed by the person: Leaving, Toileting, Showering, Sleeping, Breakfast, Lunch, Dinner, Snack, Spare_Time/TV, Grooming. The data is spread over several days as many entries in the log Activities.txt, taken from [1-2] and downloadable at http://coned.utcluj.ro/~salomie/PT_Lic/4_Lab/Assignment_5/ 

Write a program that uses functional programming in Java with lambda expressions and stream processing to perform the tasks listed in the table below. The results of each task must be written in a separate .txt file (each .txt file must be named according to the following template task_number.txt, for example Task_1.txt).
 
TASK_1
Define a class MonitoredData with 3 fields: start time, end time and activity as string. Read the data from the file Activity.txt using streams and split each line in 3 parts: start_time, end_time and activity_label, and create a list of objects of type MonitoredData.
TASK_2
Count the distinct days that appear in the monitoring data.
TASK_3
Count how many times each activity has appeared over the entire monitoring period.
• 
Return a structure of type Map<String, Integer> representing the mapping of each distinct activity to the number of occurrences in the log; therefore the key of the Map will represent a String object corresponding to the activity name, and the value will represent an Integer object corresponding to the
 

 
number of times the activity has appeared over the monitoring period.
 
TASK_4
Count for how many times each activity has appeared for each day over the monitoring period.

• Return a structure of type Map<Integer, Map<String, Integer>> that contains the activity count for each day of the log; therefore the key of the Map will represent an Integer object corresponding to the number of the monitored day, and the value will represent a Map<String, Integer> (in this map the key which is a String object corresponds to the name of the activity, and the value which is an Integer object corresponds to the number of times that activity has appeared within the day)  
TASK_5
For each activity compute the entire duration over the monitoring period.

• Return a structure of type Map<String, LocalTime> in which the key of the Map will represent a String object corresponding to the activity name, and the value will represent a LocalTime object corresponding to the entire duration of the activity over the monitoring period.
TASK_6
Filter the activities that have more than 90% of the monitoring records with duration less than 5 minutes, collect the results in a List<String> containing only the distinct activity names and return the list.