Add initial files

Co-authored-by: LucasCatolino <lcatolino@fi.uba.ar>
Co-authored-by: KuJo7 <joel.k2010@gmail.com>

.gitignore

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+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+*/.idea/
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# AWS User-specific
+.idea/**/aws.xml
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# SonarLint plugin
+.idea/sonarlint/
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+replay_pid*
+
+##############################
+## Java
+##############################
+.mtj.tmp/
+*.class
+*.jar
+*.war
+*.ear
+*.nar
+hs_err_pid*
+replay_pid*
+
+##############################
+## Maven
+##############################
+target/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+pom.xml.bak
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+.mvn/wrapper/maven-wrapper.jar
+
+##############################
+## Gradle
+##############################
+bin/
+build/
+.gradle
+.gradletasknamecache
+gradle-app.setting
+!gradle-wrapper.jar
+
+##############################
+## IntelliJ
+##############################
+out/
+.idea/
+.idea_modules/
+*.iml
+*.ipr
+*.iws
+
+##############################
+## Eclipse
+##############################
+.settings/
+bin/
+tmp/
+.metadata
+.classpath
+.project
+*.tmp
+*.bak
+*.swp
+*~.nib
+local.properties
+.loadpath
+.factorypath
+
+##############################
+## NetBeans
+##############################
+nbproject/private/
+build/
+nbbuild/
+dist/
+nbdist/
+nbactions.xml
+nb-configuration.xml
+
+##############################
+## Visual Studio Code
+##############################
+.vscode/
+.code-workspace
+
+##############################
+## OS X
+##############################
+.DS_Store
+
+##############################
+## Miscellaneous
+##############################
+*.log

test/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>edu.uastw</groupId>
+    <artifactId>test</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+</project>

test/src/main/java/edu/uastw/Book.java

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+package edu.uastw;
+
+public class Book implements LibraryItem {
+    private final String title;
+    private final String author;
+
+    public Book(String title, String author) {
+        this.title = title;
+        this.author = author;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    @Override
+    public String getOwner() {
+        return author;
+    }
+}

test/src/main/java/edu/uastw/DecreaseBooksCapacityDecorator.java

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+package edu.uastw;
+
+class DecreaseBooksCapacityDecorator extends LibraryDecorator {
+    private final int reducedCapacity;
+
+    public DecreaseBooksCapacityDecorator(Library library, int reducedCapacity) {
+        super(library);
+        this.reducedCapacity = reducedCapacity;
+    }
+
+    @Override
+    public void extendedFunctionality() {
+        int newCapacity = library.getBooksCapacity() - reducedCapacity;
+        if (newCapacity >= 0) {
+            library.setBooksCapacity(newCapacity);
+            System.out.println("Books capacity decreased by " + reducedCapacity);
+        } else {
+            System.out.println("Cannot decrease capacity. New capacity would be negative.");
+        }
+    }
+}

test/src/main/java/edu/uastw/IncreaseBooksCapacityDecorator.java

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+package edu.uastw;
+
+class IncreaseBooksCapacityDecorator extends LibraryDecorator {
+    private final int additionalCapacity;
+
+    public IncreaseBooksCapacityDecorator(Library library, int additionalCapacity) {
+        super(library);
+        this.additionalCapacity = additionalCapacity;
+    }
+
+    @Override
+    public void extendedFunctionality() {
+        library.setBooksCapacity(library.getBooksCapacity() + additionalCapacity);
+        System.out.println("Books capacity increased by " + additionalCapacity);
+    }
+}

test/src/main/java/edu/uastw/Library.java

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+package edu.uastw;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Library {
+    private static Library instance;
+    private final List<LibraryItem> libraryItems;
+    private int booksCapacity = 100;
+
+    public Library() {
+        this.libraryItems = new ArrayList<>();
+    }
+
+    public static Library getInstance() {
+        if (instance == null) {
+            instance = new Library();
+        }
+        return instance;
+    }
+    public void setBooksCapacity(int capacity) {
+        this.booksCapacity = capacity;
+    }
+
+    public int getBooksCapacity() {
+        return booksCapacity;
+    }
+
+    public void addLibraryItem(LibraryItem libraryItem) {
+        if (libraryItems.size() < booksCapacity) {
+            libraryItems.add(libraryItem);
+        } else {
+            System.out.println("Library capacity reached. Cannot add more items.");
+        }
+    }
+
+    public void displayLibraryItems() {
+        System.out.println("Items available in the library:");
+        libraryItems.forEach(libraryItem ->
+                System.out.println(libraryItem.getTitle() + " by " + libraryItem.getOwner())
+        );
+    }
+}

test/src/main/java/edu/uastw/LibraryBuilder.java

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+package edu.uastw;
+
+public class LibraryBuilder {
+    private final Library library;
+
+    public LibraryBuilder() {
+        library = Library.getInstance();
+    }
+
+    public LibraryBuilder addLibraryItem(LibraryItem libraryItem) {
+        library.addLibraryItem(libraryItem);
+        return this;
+    }
+
+    public Library build() {
+        return library;
+    }
+}

test/src/main/java/edu/uastw/LibraryDecorator.java

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+package edu.uastw;
+
+abstract class LibraryDecorator extends Library {
+    protected Library library;
+
+    public LibraryDecorator(Library library) {
+        this.library = library;
+    }
+
+    public abstract void extendedFunctionality();
+}

test/src/main/java/edu/uastw/LibraryItem.java

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+package edu.uastw;
+
+interface LibraryItem {
+    String getTitle();
+    String getOwner();
+}

test/src/main/java/edu/uastw/Magazine.java

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+package edu.uastw;
+
+public class Magazine implements LibraryItem {
+    private final String title;
+    private final String publisher;
+
+    public Magazine(String title, String publisher) {
+        this.title = title;
+        this.publisher = publisher;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    @Override
+    public String getOwner() {
+        return publisher;
+    }
+}

test/src/main/java/edu/uastw/Test.java

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+package edu.uastw;
+
+public class Test {
+    public static void main(String[] args) {
+        LibraryItem book1 = new Book("The Great Gatsby", "F. Scott Fitzgerald");
+        LibraryItem book2 = new Book("To Kill a Mockingbird", "Harper Lee");
+        LibraryItem book3 = new Book("1984", "George Orwell");
+        LibraryItem magazine1 = new Magazine("National Geographic", "National Geographic Society");
+
+        Library library = new LibraryBuilder()
+                .addLibraryItem(book1)
+                .addLibraryItem(book2)
+                .addLibraryItem(book3)
+                .addLibraryItem(magazine1)
+                .build();
+
+        library.displayLibraryItems();
+
+        LibraryDecorator increasedCapacityLibrary = new IncreaseBooksCapacityDecorator(library, 50);
+        increasedCapacityLibrary.extendedFunctionality();
+
+        System.out.println("Modified books capacity: " + library.getBooksCapacity());
+
+        LibraryDecorator decreasedCapacityLibrary = new DecreaseBooksCapacityDecorator(library, 30);
+        decreasedCapacityLibrary.extendedFunctionality();
+
+        System.out.println("Modified books capacity: " + library.getBooksCapacity());
+    }
+}