Java Program to code a Middleware Router.

You are asked to design a middleware router that allows you to create new paths and associate them with different values.

The format of a path is one or more concatenated strings of the form: $/$ followed by one or more lowercase English letters

void addRoute$($String path, String result$)$ : Creates a new$$path$$and associates a$$value

String callRoute$($String path$)$: Returns the value associated with$$path$$or returns$-1$if the path doesn't exist.

e$.$g:

Router.addRoute$("/$bar$",$ "result"$)$

Router.callRoute$("/$bar$")->$ output : "result"

Router.addRoute$("/$foo$/$bar$/$aa$,$ "result$2")$

Router.callRoute$("/$foo$/$bar$/$aa$)->$ output: "result$2"$

Follow up $1$:

Handle wildcard char e$.$g $*.$ For example, if addRoute is $("/$a$/*/$b$",$ result$3)$ and someone calls with callRoute$("/$a$/$x$/$y$/$b$")$ it should return result$3.$

As the wildcard char will match with $"/$x$/$y$"$ part. Expectation was to use a pattern matching library and somehow handle it in addRoute method

Follow up $2$:

Handle wildcard char e$.$g $*.$ For example, if addRoute is addRoute$("/$foo$/$bar$/$xxx$/$yyy$",$ "result$4)$ and someone calls with callRoute$("/$foo$/*/$yyy$")$ it should return result$4.$

As the wildcard char will match with $"/$xxx$/$yyy$$ part.

Consider the following:

$1]$ Use the Design principles and design patterns in the code

$2]$ Write Executable code with Junit Tests and Console Tests.

$3]$ How can we use this code in concurrent environment?