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‎PULL_REQUEST_TEMPLATE.md

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Pull request title
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- Clearly and concisely describes what it does
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- Refer to the issue that it solves, if available
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Pull request description
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- Describes the main changes that come with the pull request
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- Any relevant additional information is provided
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> For detailed contributing instructions see https://github.com/iluwatar/java-design-patterns/wiki/01.-How-to-contribute

‎README.md

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[![License MIT](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/iluwatar/java-design-patterns/master/LICENSE.md)
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[![Join the chat at https://gitter.im/iluwatar/java-design-patterns](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/iluwatar/java-design-patterns?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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[![Quality Gate](https://sonarqube.com/api/badges/gate?key=com.iluwatar%3Ajava-design-patterns)](https://sonarqube.com/dashboard/index/com.iluwatar%3Ajava-design-patterns)
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[![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/1503/badge)](https://bestpractices.coreinfrastructure.org/projects/1503)
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# Introduction
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‎_scripts/postPumlsToServer.py

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‎abstract-document/README.md

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title: Abstract Document
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folder: abstract-document
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permalink: /patterns/abstract-document/
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pumlid: PSjB3eCm34NHhPG599vtDyQn85L-ifzX-p3lxEf8Twj3MXGDQvyJMFubChxpKN767gucSq07iinEjSNDOACVNvoAUZr6MWoe3QVE_WRnxZ0Mf38b-hkIGlurX_MyehS7
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categories: Structural
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tags:
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- Java

‎abstract-document/etc/abstract-document.urm.puml

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‎abstract-document/pom.xml

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<parent>
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<artifactId>java-design-patterns</artifactId>
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<groupId>com.iluwatar</groupId>
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<version>1.17.0-SNAPSHOT</version>
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<version>1.18.0-SNAPSHOT</version>
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</parent>
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<artifactId>abstract-document</artifactId>
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<dependencies>

‎abstract-factory/README.md

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title: Abstract Factory
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folder: abstract-factory
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permalink: /patterns/abstract-factory/
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pumlid: PSZB3OD034NHLa81Czwd6sCC39gVxEUWT1_ssLmTtQLqgR5fM7sTmFGtaV6TZu8prd0r6HtQaMKqAZLk1XjT_E6qgPUZfyc0MdTgx0-8LuUn8ErFXdr98NypXxKyezKV
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categories: Creational
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tags:
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- Java
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army.getDescription(); // Output: This is the Elven Army!
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```
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Now, we can design a factory for our different kingdom factories. In this example, we created FactoryMaker, responsible for returning an instance of either ElfKingdomFactory or OrcKingdomFactory.
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The client can use FactoryMaker to create the desired concrete factory which, in turn, will produce different concrete objects (Army, King, Castle).
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In this example, we also used an enum to parameterize which type of kingdom factory the client will ask for.
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```
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public static class FactoryMaker {
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public enum KingdomType {
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ELF, ORC
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}
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public static KingdomFactory makeFactory(KingdomType type) {
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switch (type) {
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case ELF:
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return new ElfKingdomFactory();
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case ORC:
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return new OrcKingdomFactory();
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default:
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throw new IllegalArgumentException("KingdomType not supported.");
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}
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}
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}
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public static void main(String[] args) {
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App app = new App();
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LOGGER.info("Elf Kingdom");
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app.createKingdom(FactoryMaker.makeFactory(KingdomType.ELF));
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LOGGER.info(app.getArmy().getDescription());
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LOGGER.info(app.getCastle().getDescription());
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LOGGER.info(app.getKing().getDescription());
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LOGGER.info("Orc Kingdom");
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app.createKingdom(FactoryMaker.makeFactory(KingdomType.ORC));
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-- similar use of the orc factory
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}
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```
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## Applicability
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Use the Abstract Factory pattern when
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* Dependency injection in java hides the service class dependencies that can lead to runtime errors that would have been caught at compile time.
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## Presentations
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* [Abstract Factory Pattern](etc/presentation.html)
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## Real world examples
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* [javax.xml.parsers.DocumentBuilderFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/parsers/DocumentBuilderFactory.html)

‎abstract-factory/etc/diagram1.png

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‎abstract-factory/etc/diagram2.png

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