Implementing the Template Method Pattern with Java - BAEL-1289 (#3038)

* Initial Commit

* Update HighEndComputerBuilder.java

* Update HighEndComputerBuilder.java

* Update StandardComputerBuilder.java

* Update TemplateMethodPatternTest.java

* Update ComputerBuilder.java

* Delete HighEndComputer.java

* Delete StandardComputer.java

patterns/template-method/src/main/java/com/baeldung/templatemethodpattern/model/Computer.java

@@ -2,36 +2,16 @@ package com.baeldung.templatemethodpattern.model;
 
 import java.util.HashMap;
 import java.util.Map;
-import java.util.ArrayList;
-import java.util.List;
 
-public abstract class ComputerBuilder {
+public class Computer {
     
-    protected Map<String, String> computerParts = new HashMap<>();
+    private Map<String, String> computerParts = new HashMap<>();
-    protected List<String> moterboardSetupStatus = new ArrayList<>();
     
-    public final Computer buildComputer() {
+    public Computer(Map<String, String> computerParts) {
-        addMotherboard();
+        this.computerParts = computerParts;
-        setupMotherboard();
-        addProcessor();
-        return getComputer();
-    }
-    
-    public abstract void addMotherboard();
-    
-     public abstract void setupMotherboard();
-    
-    public abstract void addProcessor();
-    
-    public List<String> getMotherboardSetupStatus() {
-        return moterboardSetupStatus;
     }
     
     public Map<String, String> getComputerParts() {
         return computerParts;
     }
-     
-    private Computer getComputer() {
-        return new Computer(computerParts);
-    }
 }

patterns/template-method/src/main/java/com/baeldung/templatemethodpattern/model/ComputerBuilder.java

@@ -8,7 +8,7 @@ import java.util.Map;
 public abstract class ComputerBuilder {
 
     protected Map<String, String> computerParts = new HashMap<>();
-    protected List<String> moterboardSetupStatus = new ArrayList<>();
+    protected List<String> motherboardSetupStatus = new ArrayList<>();
     
     public final Computer buildComputer() {
         addMotherboard();
@@ -24,7 +24,7 @@ public abstract class ComputerBuilder {
     public abstract void addProcessor();
 
     public List<String> getMotherboardSetupStatus() {
-        return moterboardSetupStatus;
+        return motherboardSetupStatus;
     }
     
     public Map<String, String> getComputerParts() {

patterns/template-method/src/main/java/com/baeldung/templatemethodpattern/model/HighEndComputer.java

@@ -1,26 +0,0 @@
-package com.baeldung.templatemethodpattern.model;
-
-public class HighEndComputer extends Computer {
-
-    @Override
-    public void addMotherboard() {
-         computerParts.put("Motherboard", "High-end Motherboard");
-    }
-    
-    @Override
-    public void setupMotherboard() {
-        moterboardSetupStatus.add("Screwing the high-end motherboard to the case.");
-        moterboardSetupStatus.add("Pluging in the power supply connectors.");
-        moterboardSetupStatus.forEach(step -> System.out.println(step));
-    }
-    
-    @Override
-    public void addProcessor() {
-         computerParts.put("Processor", "High-end Processor");
-    }
-    
-    @Override
-    public void addMotherboard() {
-         computerParts.put("Motherboard", "High End Motherboard");
-    }
-}

patterns/template-method/src/main/java/com/baeldung/templatemethodpattern/model/HighEndComputerBuilder.java

@@ -9,9 +9,9 @@ public class HighEndComputerBuilder extends ComputerBuilder {
     
     @Override
     public void setupMotherboard() {
-        moterboardSetupStatus.add("Screwing the high-end motherboard to the case.");
+        motherboardSetupStatus.add("Screwing the high-end motherboard to the case.");
-        moterboardSetupStatus.add("Pluging in the power supply connectors.");
+        motherboardSetupStatus.add("Pluging in the power supply connectors.");
-        moterboardSetupStatus.forEach(step -> System.out.println(step));
+        motherboardSetupStatus.forEach(step -> System.out.println(step));
     }
     
     @Override

patterns/template-method/src/main/java/com/baeldung/templatemethodpattern/model/StandardComputer.java

@@ -1,25 +0,0 @@
-package com.baeldung.templatemethodpattern.model;
- 
-public class StandardComputer extends Computer {
-    
-    public void addMotherboard() {
-        computerParts.put("Motherboard", "Standard Motherboard");
-    }
-    
-    @Override
-    public void setupMotherboard() {
-        moterboardSetupStatus.add("Screwing the standard motherboard to the case.");
-        moterboardSetupStatus.add("Pluging in the power supply connectors.");
-        moterboardSetupStatus.forEach(step -> System.out.println(step));
-    }
-    
-    @Override
-    public void addProcessor() {
-        computerParts.put("Processor", "Standard Processor");
-    }
-
-    @Override
-    public void addMotherboard() {
-        computerParts.put("Motherboard", "Standard Motherboard");
-    }
-}

patterns/template-method/src/main/java/com/baeldung/templatemethodpattern/model/StandardComputerBuilder.java

@@ -9,9 +9,9 @@ public class StandardComputerBuilder extends ComputerBuilder {
     
     @Override
     public void setupMotherboard() {
-        moterboardSetupStatus.add("Screwing the standard motherboard to the case.");
+        motherboardSetupStatus.add("Screwing the standard motherboard to the case.");
-        moterboardSetupStatus.add("Pluging in the power supply connectors.");
+        motherboardSetupStatus.add("Pluging in the power supply connectors.");
-        moterboardSetupStatus.forEach(step -> System.out.println(step));
+        motherboardSetupStatus.forEach(step -> System.out.println(step));
     }
     
     @Override

patterns/template-method/src/test/java/com/baeldung/templatemethodpatterntest/TemplateMethodPatternTest.java

@@ -29,8 +29,8 @@ public class TemplateMethodPatternTest {
 
     @Test
     public void givenStandardMotherBoard_whenAddingMotherBoard_thenEqualAssertion() {
-        standardComputer.addMotherboard();
+        standardComputerBuilder.addMotherboard();
-        assertEquals("Standard Motherboard", standardComputer.getComputerParts().get("Motherboard"));
+        assertEquals("Standard Motherboard", standardComputerBuilder.getComputerParts().get("Motherboard"));
     }
 
     @Test
@@ -81,7 +81,6 @@ public class TemplateMethodPatternTest {
         highEndComputerBuilder.buildComputer();
         assertEquals(2, highEndComputerBuilder.getComputerParts().size());
     }
-    
     @Test
     public void givenAllHighEndParts_whenComputerisBuilt_thenComputerInstance() {
         assertThat(standardComputerBuilder.buildComputer(), instanceOf(Computer.class));