#10 effective java: item 5

effective-java/src/main/java/com/example/effectivejava/chapter01/item05/DefaultDictionary.java

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+package com.example.effectivejava.chapter01.item05;
+
+import java.util.List;
+
+public class DefaultDictionary implements Dictionary{
+
+    @Override
+    public boolean contains(String word) {
+        return false;
+    }
+
+    @Override
+    public List<String> closeWordsTo(String typo) {
+        return null;
+    }
+}

effective-java/src/main/java/com/example/effectivejava/chapter01/item05/Dictionary.java

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+package com.example.effectivejava.chapter01.item05;
+
+import java.util.List;
+
+public interface Dictionary {
+
+    boolean contains(String word);
+
+    List<String> closeWordsTo(String typo);
+}

effective-java/src/main/java/com/example/effectivejava/chapter01/item05/dependencyinjection/SpellChecker.java

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+package com.example.effectivejava.chapter01.item05.dependencyinjection;
+
+import com.example.effectivejava.chapter01.item05.Dictionary;
+
+import java.util.List;
+
+public class SpellChecker {
+
+    private final Dictionary dictionary;
+
+    public SpellChecker(Dictionary dictionary) {
+        this.dictionary = dictionary;
+    }
+
+    public boolean isValid(String word) {
+        // TODO 여기 SpellChecker 코드
+        return dictionary.contains(word);
+    }
+
+    public List<String> suggestions(String typo) {
+        // TODO 여기 SpellChecker 코드
+        return dictionary.closeWordsTo(typo);
+    }
+}

effective-java/src/main/java/com/example/effectivejava/chapter01/item05/singleton/SpellChecker.java

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+package com.example.effectivejava.chapter01.item05.singleton;
+
+import com.example.effectivejava.chapter01.item05.DefaultDictionary;
+import com.example.effectivejava.chapter01.item05.Dictionary;
+
+import java.util.List;
+
+public class SpellChecker {
+
+    private final Dictionary dictionary = new DefaultDictionary();
+
+    private SpellChecker() {}
+
+    public static final SpellChecker INSTANCE = new SpellChecker();
+
+    public boolean isValid(String word) {
+        // TODO 여기 SpellChecker 코드
+        return dictionary.contains(word);
+    }
+
+    public List<String> suggestions(String typo) {
+        // TODO 여기 SpellChecker 코드
+        return dictionary.closeWordsTo(typo);
+    }
+}

effective-java/src/main/java/com/example/effectivejava/chapter01/item05/staticutils/SpellChecker.java

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+package com.example.effectivejava.chapter01.item05.staticutils;
+
+import com.example.effectivejava.chapter01.item05.DefaultDictionary;
+import com.example.effectivejava.chapter01.item05.Dictionary;
+
+import java.util.List;
+
+public class SpellChecker {
+
+    private static final Dictionary dictionary = new DefaultDictionary();
+
+    private SpellChecker() {
+    }
+
+    public static boolean isValid(String word) {
+        // TODO 여기 SpellChecker 코드
+        return dictionary.contains(word);
+    }
+
+    public static List<String> suggestions(String typo) {
+        // TODO 여기 SpellChecker 코드
+        return dictionary.closeWordsTo(typo);
+    }
+}

effective-java/src/test/java/com/example/effectivejava/chapter01/item05/dependencyinjection/SpellCheckerTest.java

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+package com.example.effectivejava.chapter01.item05.dependencyinjection;
+
+import com.example.effectivejava.chapter01.item05.DefaultDictionary;
+import org.junit.jupiter.api.Test;
+
+class SpellCheckerTest {
+
+    @Test
+    void isValid() {
+        SpellChecker spellChecker = new SpellChecker(new DefaultDictionary());
+        spellChecker.isValid("test");
+    }
+
+}

effective-java/src/test/java/com/example/effectivejava/chapter01/item05/staticutils/SpellCheckerTest.java

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+package com.example.effectivejava.chapter01.item05.staticutils;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class SpellCheckerTest {
+
+    @Test
+    void isValid() {
+        assertTrue(SpellChecker.isValid("test"));
+    }
+
+}