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* #1299 IMPLEMENT IDENTITY MAP PATTERN. * #1299 Add docstrings, README, testCases and class diagram. * #1299 Update a comment string in DB implementation. * #1299 Fix code smells. * #1299 Fix code smells and add comments to App.java * #1299 Update constant name. * #1299 Remove java version dependency and update README.md. * #1299 Add lombok to PersonFinder.java. * #1299 Add dependency to maven-assembly-plugin. * #1299 Use java streams in PersonDbSimulatorImplementation.java. * #1299 Add print statements while returning the person object. * #1299 Update README.md. * #1299 Add puml file. * Update README.md
78 lines
2.5 KiB
Java
78 lines
2.5 KiB
Java
/*
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* This project is licensed under the MIT license. Module model-view-viewmodel is using ZK framework licensed under LGPL (see lgpl-3.0.txt).
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*
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* The MIT License
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* Copyright © 2014-2022 Ilkka Seppälä
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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package com.iluwatar.identitymap;
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import java.util.HashMap;
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import java.util.Map;
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import lombok.Getter;
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import lombok.extern.slf4j.Slf4j;
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/**
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* This class stores the map into which we will be caching records after loading them from a DataBase.
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* Stores the records as a Hash Map with the personNationalIDs as keys.
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*/
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@Slf4j
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@Getter
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public class IdentityMap {
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private Map<Integer, Person> personMap = new HashMap<>();
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/**
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* Add person to the map.
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*/
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public void addPerson(Person person) {
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if (!personMap.containsKey(person.getPersonNationalId())) {
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personMap.put(person.getPersonNationalId(), person);
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} else { // Ensure that addPerson does not update a record. This situation will never arise in our implementation. Added only for testing purposes.
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LOGGER.info("Key already in Map");
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}
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}
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/**
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* Get Person with given id.
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*
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* @param id : personNationalId as requested by user.
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*/
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public Person getPerson(int id) {
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Person person = personMap.get(id);
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if (person == null) {
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LOGGER.info("ID not in Map.");
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return null;
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}
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LOGGER.info(person.toString());
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return person;
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}
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/**
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* Get the size of the map.
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*/
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public int size() {
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if (personMap == null) {
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return 0;
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}
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return personMap.size();
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}
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}
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