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https://github.com/tiennm99/java-design-patterns.git
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BAGHDAD MohamedandGitHub
5d6ff2f0c4
Add an educational rule-engine module demonstrating the Rule Engine pattern. Each business rule is an independent object exposing evaluate (decision) and execute (action); a RuleEngine evaluates a collection of rules against an immutable loan-application context in insertion order, runs the passing rules, and reports every passed and failed rule via an immutable RuleEngineResult. Includes three concrete rules, an App demo, unit tests, README, and class diagram.
39 lines
1.8 KiB
Java
39 lines
1.8 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.ruleengine;
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/**
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* Immutable context that the loan {@link Rule rules} are evaluated against.
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*
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* <p>Using a record keeps the domain object immutable and free of behaviour, so the business logic
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* lives entirely inside the rules rather than being scattered across the data it operates on.
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*
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* @param age applicant age in years
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* @param monthlyIncome applicant net monthly income
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* @param loanAmount requested loan amount
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* @param creditScore applicant credit score
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*/
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public record LoanApplication(int age, double monthlyIncome, double loanAmount, int creditScore) {}
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