BAEL-4848 Update "Java Adapter Pattern" article (#13624)

patterns-modules/design-patterns-structural/src/main/java/com/baeldung/adapter/AdapterPatternDriver.java

@@ -1,20 +0,0 @@
-package com.baeldung.adapter;
-
-import static com.baeldung.util.LoggerUtil.LOG;
-
-public class AdapterPatternDriver {
-    
-    public static void main(String args[]) {
-    	Movable bugattiVeyron = new BugattiVeyron();
-    	MovableAdapter bugattiVeyronAdapter = new MovableAdapterImpl(bugattiVeyron);
-        LOG.info("Bugatti Veyron Super Sport's top speed is " + bugattiVeyronAdapter.getSpeed() + " Kmph.");
-
-        Movable mcLaren = new McLaren();
-        MovableAdapter mcLarenAdapter = new MovableAdapterImpl(mcLaren);
-        LOG.info("McLaren F1 top speed is " + mcLarenAdapter.getSpeed() + " Kmph.");
-
-        Movable astonMartin = new AstonMartin();
-        MovableAdapter astonMartinAdapter = new MovableAdapterImpl(astonMartin);
-        LOG.info("McLaren F1 top speed is " + astonMartinAdapter.getSpeed() + " Kmph.");
-    }
-}

patterns-modules/design-patterns-structural/src/main/java/com/baeldung/adapter/AstonMartin.java

@@ -1,8 +0,0 @@
-package com.baeldung.adapter;
-
-public class AstonMartin implements Movable {
-    @Override
-    public double getSpeed() {
-        return 220;
-    }
-}

patterns-modules/design-patterns-structural/src/main/java/com/baeldung/adapter/BugattiVeyron.java

@@ -1,8 +0,0 @@
-package com.baeldung.adapter;
-
-public class BugattiVeyron implements Movable {
-    @Override
-    public double getSpeed() {
-        return 268;
-    }
-}

patterns-modules/design-patterns-structural/src/main/java/com/baeldung/adapter/IteratorAdapter.java

@@ -0,0 +1,24 @@
+package com.baeldung.adapter;
+
+import java.util.Enumeration;
+import java.util.Iterator;
+
+public class IteratorAdapter<E> implements Iterator<E> {
+
+    private Enumeration<E> enumeration;
+
+    public IteratorAdapter(Enumeration<E> enumeration) {
+        this.enumeration = enumeration;
+    }
+
+    @Override
+    public boolean hasNext() {
+        return enumeration.hasMoreElements();
+    }
+
+    @Override
+    public E next() {
+        return enumeration.nextElement();
+    }
+
+}

patterns-modules/design-patterns-structural/src/main/java/com/baeldung/adapter/McLaren.java

@@ -1,8 +0,0 @@
-package com.baeldung.adapter;
-
-public class McLaren implements Movable {
-    @Override
-    public double getSpeed() {
-        return 241;
-    }
-}

patterns-modules/design-patterns-structural/src/main/java/com/baeldung/adapter/Movable.java

@@ -1,6 +0,0 @@
-package com.baeldung.adapter;
-
-public interface Movable {
-    // returns speed in MPH 
-    double getSpeed();
-}

patterns-modules/design-patterns-structural/src/main/java/com/baeldung/adapter/MovableAdapter.java

@@ -1,6 +0,0 @@
-package com.baeldung.adapter;
-
-public interface MovableAdapter {
-    // returns speed in KMPH 
-    double getSpeed();
-}

patterns-modules/design-patterns-structural/src/main/java/com/baeldung/adapter/MovableAdapterImpl.java

@@ -1,19 +0,0 @@
-package com.baeldung.adapter;
-
-public class MovableAdapterImpl implements MovableAdapter {
-    private Movable luxuryCars;
-    
-    public MovableAdapterImpl(Movable luxuryCars) {
-        this.luxuryCars = luxuryCars;
-    }
-
-    @Override
-    public double getSpeed() {
-        double mph = luxuryCars.getSpeed();
-        return convertMPHtoKMPH(mph);
-    }
-    
-    private double convertMPHtoKMPH(double mph) {
-        return mph * 1.60934;
-    }
-}

patterns-modules/design-patterns-structural/src/main/java/com/baeldung/adapter/StringTokenizerIteratorAdapter.java

@@ -0,0 +1,29 @@
+package com.baeldung.adapter;
+
+import java.util.Iterator;
+import java.util.StringTokenizer;
+
+public class StringTokenizerIteratorAdapter extends StringTokenizer implements Iterator<String> {
+
+    public StringTokenizerIteratorAdapter(final String str, final String delim, final boolean returnDelims) {
+        super(str, delim, returnDelims);
+    }
+
+    public StringTokenizerIteratorAdapter(final String str, final String delim) {
+        super(str, delim);
+    }
+
+    public StringTokenizerIteratorAdapter(final String str) {
+        super(str);
+    }
+
+    @Override
+    public boolean hasNext() {
+        return hasMoreTokens();
+    }
+
+    @Override
+    public String next() {
+        return nextToken();
+    }
+}

patterns-modules/design-patterns-structural/src/test/java/com/baeldung/adapter/AdapterPatternIntegrationTest.java

@@ -1,23 +0,0 @@
-package com.baeldung.adapter;
-
-import static org.junit.Assert.assertEquals;
-
-import org.junit.Test;
-
-public class AdapterPatternIntegrationTest {
-    @Test
-    public void givenMovableAdapter_WhenConvertingMPHToKMPH_thenSuccessfullyConverted() {
-        Movable bugattiVeyron = new BugattiVeyron();
-        MovableAdapter bugattiVeyronAdapter = new MovableAdapterImpl(bugattiVeyron);
-        assertEquals(bugattiVeyronAdapter.getSpeed(), 431.30312, 0.00001);
-
-        Movable mcLaren = new McLaren();
-        MovableAdapter mcLarenAdapter = new MovableAdapterImpl(mcLaren);
-        assertEquals(mcLarenAdapter.getSpeed(), 387.85094, 0.00001);
-
-        Movable astonMartin = new AstonMartin();
-        MovableAdapter astonMartinAdapter = new MovableAdapterImpl(astonMartin);
-        assertEquals(astonMartinAdapter.getSpeed(), 354.0548, 0.00001);
-    }
-}
-

patterns-modules/design-patterns-structural/src/test/java/com/baeldung/adapter/IteratorAdapterUnitTest.java

@@ -0,0 +1,34 @@
+package com.baeldung.adapter;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+import java.util.StringTokenizer;
+import org.junit.jupiter.api.Test;
+
+class IteratorAdapterUnitTest {
+
+    public static final String STRING_DATA = "Welcome to baeldung.com";
+    private final StringTokenizer tokenizer = new StringTokenizer(STRING_DATA);
+    private final Iterator<String> tokenizerAdapter = new StringTokenizerIteratorAdapter(STRING_DATA);
+    private final List<String> expectedTokensForString = Arrays.asList("Welcome", "to", "baeldung.com");
+
+    @Test
+    void givenTokenizer_thenAdapterProducesCorrectResult() {
+        List<String> actualTokens = new ArrayList<>();
+        new IteratorAdapter(tokenizer).forEachRemaining(s -> actualTokens.add((String) s));
+        assertEquals(expectedTokensForString, actualTokens);
+    }
+
+    @Test
+    void givenTokenizerAdapter_thenIteratorProducesCorrectResult() {
+        List<String> actualTokens = new ArrayList<>();
+        tokenizerAdapter.forEachRemaining(actualTokens::add);
+        assertEquals(expectedTokensForString, actualTokens);
+    }
+
+
+}