Init Commit

.gitignore

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+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
+/.idea/

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>org.example</groupId>
+    <artifactId>canva-interview</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>5.10.0</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-junit-jupiter</artifactId>
+            <version>5.5.0</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>

src/main/java/org/example/Main.java

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+package org.example;
+
+public class Main {
+    public static void main(String[] args) {
+        System.out.println("Hello world!");
+    }
+}

src/main/java/org/example/VideoCache.java

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+package org.example;
+
+import org.example.data.VideoMap;
+
+public interface VideoCache {
+    void set(String videoId, String videoContent);
+
+    String get(String videoId);
+
+    VideoMap getData();
+}

src/main/java/org/example/VideoCache2.java

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+package org.example;
+
+import org.example.data.VideoMap2;
+
+public interface VideoCache2 {
+    void set(String videoId, String videoContent);
+
+    String get(String videoId);
+
+    VideoMap2 getData();
+}

src/main/java/org/example/VideoCacheImpl.java

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+package org.example;
+
+import org.example.data.VideoMap;
+
+public class VideoCacheImpl implements VideoCache {
+    private VideoMap data;
+
+    public VideoCacheImpl() {
+        data = new VideoMap();
+    }
+
+    public void set(String videoId, String videoContent) {
+        data.put(videoId, videoContent);
+    }
+
+    public String get(String videoId) {
+        return data.get(videoId);
+    }
+
+    public VideoMap getData() {
+        return data;
+    }
+}

src/main/java/org/example/VideoCacheImpl2.java

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+package org.example;
+
+import org.example.data.VideoMap2;
+
+public class VideoCacheImpl2 implements VideoCache2 {
+    private VideoMap2 data;
+
+    public VideoCacheImpl2() {
+        data = new VideoMap2();
+    }
+
+    public void set(String videoId, String videoContent) {
+        data.put(videoId, videoContent);
+    }
+
+    public String get(String videoId) {
+        return data.get(videoId);
+    }
+
+    public VideoMap2 getData() {
+        return data;
+    }
+}

src/main/java/org/example/data/VideoMap.java

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+package org.example.data;
+
+public class VideoMap {
+    String[] data;
+    String[] keys;
+    int size;
+
+    public VideoMap() {
+        data = new String[1000];
+        keys = new String[1000];
+        size = 0;
+    }
+
+    public void put(String key, String value) {
+        keys[size] = key;
+        data[size] = value;
+        size++;
+    }
+
+    public String get(String key) {
+        for (int i = 0; i < size; i++) {
+            if (keys[i].equals(key)) {
+                return data[i];
+            }
+        }
+        return null;
+    }
+
+    public String[] getData() {
+        return data;
+    }
+
+    public String[] getKeys() {
+        return keys;
+    }
+
+    public int getSize() {
+        return size;
+    }
+}

src/main/java/org/example/data/VideoMap2.java

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+package org.example.data;
+
+import java.util.HashMap;
+import java.util.Hashtable;
+import java.util.Map;
+
+public class VideoMap2 {
+    private Entry[] data;
+    private int size;
+
+    public VideoMap2() {
+        data = new Entry[1000];
+        size = 0;
+    }
+
+    public void put(String key, String value) {
+        int index = getIndexFromKey(key);
+        Entry entry = new Entry(key, value);
+        data[index] = entry;
+        size++;
+    }
+
+    public String get(String key) {
+        int index = getIndexFromKey(key);
+        Entry entry = data[index];
+        if (entry != null && entry.getKey().equals(key)) {
+            return entry.getValue();
+        }
+        return null;
+    }
+
+    public int getSize() {
+        return size;
+    }
+
+    public Entry[] getData() {
+        return data;
+    }
+
+    private int getIndexFromKey(String key) {
+        int hashCode = key.hashCode();
+        return (hashCode & 0x7FFFFFFF) % data.length;
+    }
+
+    public static class Entry {
+        String key;
+        String value;
+
+        public Entry(String key, String value) {
+            this.key = key;
+            this.value = value;
+        }
+
+        public String getKey() {
+            return key;
+        }
+
+        public void setKey(String key) {
+            this.key = key;
+        }
+
+        public String getValue() {
+            return value;
+        }
+
+        public void setValue(String value) {
+            this.value = value;
+        }
+    }
+}

src/test/java/org/example/VideoCacheTest.java

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+package org.example;
+
+import org.example.data.VideoMap;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+public class VideoCacheTest {
+    private VideoCache videoCache = new VideoCacheImpl();
+
+    @Test
+    public void testSet() {
+        videoCache.set("0001", "content0001");
+
+        VideoMap data = videoCache.getData();
+
+        assertEquals(1, data.getSize());
+        assertEquals("0001", data.getKeys()[0]);
+        assertEquals("content0001", data.getData()[0]);
+    }
+
+    @Test
+    public void testGet() {
+        String value = videoCache.get("0001");
+        String value2 = videoCache.get("0002");
+
+//        assertEquals("content0001", value);
+        assertNull(value);
+        assertNull(value2);
+    }
+
+    @Test
+    public void testGetWithData() {
+        String value = videoCache.get("0001");
+        String value2 = videoCache.get("0002");
+
+//        assertEquals("content0001", value);
+        assertNull(value);
+        assertNull(value2);
+    }
+}

src/test/java/org/example/VideoCacheTest2.java

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+package org.example;
+
+import org.example.data.VideoMap2;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+public class VideoCacheTest2 {
+    private VideoCache2 videoCache = new VideoCacheImpl2();
+
+    @Test
+    public void testSet() {
+        videoCache.set("0001", "content0001");
+
+        VideoMap2 data = videoCache.getData();
+        int index = ("0001".hashCode() & 0x7FFFFFFF) % data.getData().length;
+
+                assertEquals(1, data.getSize());
+        assertEquals("0001", data.getData()[index].getKey());
+        assertEquals("content0001", data.getData()[index].getValue());
+    }
+
+    @Test
+    public void testGet() {
+        String value = videoCache.get("0001");
+        String value2 = videoCache.get("0002");
+
+        assertNull(value);
+        assertNull(value2);
+    }
+
+//    @Test
+//    public void testGetWithData() {
+//        String value = videoCache.get("0001");
+//        String value2 = videoCache.get("0002");
+//
+////        assertEquals("content0001", value);
+//        assertNull(value);
+//        assertNull(value2);
+//    }
+}