karolsz001 / goodsselectormultiapp03

Multi-Module Maven Application | Last changes: implement Java 12 and need to remove Switch Expressions | Json | Maven | Streams

"# GoodsSelectorMultiApp03"

Table of contents

• General info
• Technologies
• Setup
• Features
• Status

General info

Multi-Module Maven Application with Java Modules , still in progress adding new functionality

Technologies

• Java - version 12
• gson - version 2.8.4
• maven - version 3.6
• Multi-Module Maven
• TestUnit junit 4.12
• junit-jupiter

Setup

download, compile and run, in module main file to compile main-1.0-SNAPSHOT-jar-with-dependencies.jar

Code Examples

private Customer customerWhoPaidMostInCategory(Category cat) {

                    return customersWithProducts.entrySet()
                            .stream()
                            .collect(Collectors.toMap(
                                    Map.Entry::getKey,
                                    e -> e.getValue().entrySet().stream().filter(f -> f.getKey().getCategory().equals(cat)).map(m -> m.getKey().getPrice().multiply(new BigDecimal(m.getValue()))).reduce(BigDecimal.ZERO, BigDecimal::add)
                            ))
                            .entrySet()
                            .stream()
                            .max(Comparator.comparing(Map.Entry::getValue))
                            .orElseThrow(NullPointerException::new)
                            .getKey();
                }

Features

To-do list:

• cleanCode - optimize code
• Junit
• Json

Status

Project is: in_progress