Create a Program to Create Contact Service Application in Java Assignment Solution

Instructions

Objective

Write a program to create contact service application in java language.

Requirements and Specifications

Source Code

CONTACT

/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package com.mycompany.contacttests; public class Contact { private String contactId; private String firstName; private String lastName; private String address; private String phoneNumber; public Contact(String contactId, String firstName, String lastName, String address, String phoneNumber) { //validate inputs against requirements boolean isValid = validateInput(contactId, 10); if(isValid) { this.contactId = contactId; } isValid = isValid && setContactFirstName(firstName); isValid = isValid && setContactLasttName(lastName); isValid = isValid && setAddress(address); isValid = isValid && setPhoneNumber(phoneNumber); if(!isValid) { throw new IllegalArgumentException("Invalid input"); } } public boolean setContactFirstName(String firstName) { boolean isValid = validateInput(firstName, 10); if(isValid) { this.firstName = firstName; } return isValid; } public boolean setContactLasttName(String lastName) { boolean isValid = validateInput(lastName, 10); if(isValid) { this.lastName = lastName; } return isValid; } public boolean setAddress(String address) { boolean isValid = validateInput(address, 20); if(isValid) { this.address = address; } return isValid; } public boolean setPhoneNumber(String phoneNumber) { boolean IsValid = phoneNumber.matches("\\d{10}"); if(IsValid) { this.phoneNumber = phoneNumber; } return IsValid; } public String getContactId() { return contactId; } public String getFirstName() { return firstName; } public String getLastName() { return lastName; } public String getAddress() { return address; } public String getPhoneNumber() { return phoneNumber; } private boolean validateInput(String item, int length) { return (item != null && item.length() <= length && item.length() > 0); } }

CONTACT SERVICE

package com.mycompany.contacttests; /* * To change this license header, choose License Headers in Project Properties. ;* To change this template file, choose Tools | Templates * and open the template in the editor. */ import java.util.HashMap; import java.util.Map; public class ContactService { private static ContactService reference = new ContactService(); private final Map contacts; ContactService() { this.contacts = new HashMap(); } //Create a singleton Contact Service public static ContactService getService() { return reference; } public boolean addContact(Contact contact) { boolean isSuccess = false; if(!contacts.containsKey(contact.getContactId())) { contacts.put(contact.getContactId(), contact); isSuccess = true; } return isSuccess; } public boolean deleteContact(String contactId) { return contacts.remove(contactId) != null; } public Contact getContact(String contactId) { return contacts.get(contactId); } }