Merge pull request #14727 from parthiv39731/PR-6669

BAEL-6669, Passing Class Name as Parameter in Java

core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/createobject/basic/BronzeJobCard.java

@@ -0,0 +1,21 @@
+package com.baeldung.reflection.createobject.basic;
+
+import java.lang.reflect.InvocationTargetException;
+
+public class BronzeJobCard {
+    private Object jobType;
+    public void setJobType(String jobType) throws ClassNotFoundException,
+            NoSuchMethodException, InvocationTargetException, InstantiationException, IllegalAccessException {
+        Class jobTypeClass = Class.forName(jobType);
+        this.jobType = jobTypeClass.getDeclaredConstructor().newInstance();
+    }
+    public String startJob() {
+        if(this.jobType instanceof RepairJob) {
+            return "Start Bronze " + ((RepairJob) this.jobType).getJobType();
+        }
+        if(this.jobType instanceof MaintenanceJob) {
+            return "Start Bronze " + ((MaintenanceJob) this.jobType).getJobType();
+        }
+        return "Bronze Job Failed";
+    }
+}

core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/createobject/basic/GoldJobCard.java

@@ -0,0 +1,17 @@
+package com.baeldung.reflection.createobject.basic;
+
+import java.lang.reflect.InvocationTargetException;
+
+public class GoldJobCard<T> {
+    private T jobType;
+
+    public void setJobType(Class<T> jobTypeClass) throws
+            NoSuchMethodException, InvocationTargetException, InstantiationException, IllegalAccessException {
+        this.jobType = jobTypeClass.getDeclaredConstructor().newInstance();
+    }
+
+    public String startJob() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
+        return "Start Gold " + this.jobType.getClass().getMethod("getJobType")
+                .invoke(this.jobType).toString();
+    }
+}

core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/createobject/basic/MaintenanceJob.java

@@ -0,0 +1,7 @@
+package com.baeldung.reflection.createobject.basic;
+
+public class MaintenanceJob {
+    public String getJobType() {
+        return "Maintenance Job";
+    }
+}

core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/createobject/basic/PaintJob.java

@@ -0,0 +1,7 @@
+package com.baeldung.reflection.createobject.basic;
+
+public class PaintJob {
+    public String getJobType() {
+        return "Paint Job";
+    }
+}

core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/createobject/basic/RepairJob.java

@@ -0,0 +1,7 @@
+package com.baeldung.reflection.createobject.basic;
+
+public class RepairJob {
+    public String getJobType() {
+        return "Repair Job";
+    }
+}

core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/createobject/basic/SilverJobCard.java

@@ -0,0 +1,22 @@
+package com.baeldung.reflection.createobject.basic;
+
+import java.lang.reflect.InvocationTargetException;
+
+public class SilverJobCard {
+    private Object jobType;
+
+    public void setJobType(Class jobTypeClass) throws
+            NoSuchMethodException, InvocationTargetException, InstantiationException, IllegalAccessException {
+        this.jobType = jobTypeClass.getDeclaredConstructor().newInstance();
+    }
+
+    public String startJob() {
+        if (this.jobType instanceof RepairJob) {
+            return "Start Silver " + ((RepairJob) this.jobType).getJobType();
+        }
+        if (this.jobType instanceof MaintenanceJob) {
+            return "Start Silver " + ((MaintenanceJob) this.jobType).getJobType();
+        }
+        return "Silver Job Failed";
+    }
+}

core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/createobject/special/Job.java

@@ -0,0 +1,5 @@
+package com.baeldung.reflection.createobject.special;
+
+public interface Job {
+    String getJobType();
+}

core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/createobject/special/MaintenanceJob.java

@@ -0,0 +1,7 @@
+package com.baeldung.reflection.createobject.special;
+
+public class MaintenanceJob implements Job {
+    public String getJobType() {
+        return "Maintenance Job";
+    }
+}

core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/createobject/special/PaintJob.java

@@ -0,0 +1,8 @@
+package com.baeldung.reflection.createobject.special;
+
+public class PaintJob implements Job {
+    @Override
+    public String getJobType() {
+        return "Paint Job";
+    }
+}

core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/createobject/special/PlatinumJobCard.java

@@ -0,0 +1,16 @@
+package com.baeldung.reflection.createobject.special;
+
+import java.lang.reflect.InvocationTargetException;
+
+public class PlatinumJobCard<T extends Job> {
+    private T jobType;
+
+    public void setJobType(Class<T> jobTypeClass) throws
+            NoSuchMethodException, InvocationTargetException, InstantiationException, IllegalAccessException {
+        this.jobType = jobTypeClass.getDeclaredConstructor().newInstance();
+    }
+
+    public String startJob() {
+        return "Start Platinum " + this.jobType.getJobType();
+    }
+}

core-java-modules/core-java-reflection-2/src/main/java/com/baeldung/reflection/createobject/special/RepairJob.java

@@ -0,0 +1,7 @@
+package com.baeldung.reflection.createobject.special;
+
+public class RepairJob implements Job {
+    public String getJobType() {
+        return "Repair Job";
+    }
+}

core-java-modules/core-java-reflection-2/src/main/resources/Bronze.puml

@@ -0,0 +1,20 @@
+@startuml
+'https://plantuml.com/class-diagram
+
+class BronzeJobCard {
+ -Object jobType
+ +setJobType(String jobType)
+ +startJob()
+}
+
+class MaintenanceJob {
+ +getJobType()
+}
+class RepairJob {
+ +getJobType()
+}
+BronzeJobCard -left-> MaintenanceJob:creates
+BronzeJobCard -right-> RepairJob:creates
+
+
+@enduml

core-java-modules/core-java-reflection-2/src/main/resources/Gold.puml

@@ -0,0 +1,20 @@
+@startuml
+'https://plantuml.com/class-diagram
+
+class GoldJobCard<T> {
+ -T jobType
+ +setJobType(Class<T> jobTypeClass)
+ +startJob()
+}
+
+class MaintenanceJob {
+ +getJobType()
+}
+class RepairJob {
+ +getJobType()
+}
+GoldJobCard -left-> MaintenanceJob:creates
+GoldJobCard -right-> RepairJob:creates
+
+
+@enduml

core-java-modules/core-java-reflection-2/src/main/resources/Platinum.puml

@@ -0,0 +1,25 @@
+@startuml
+'https://plantuml.com/class-diagram
+interface Job {
++getJobType
+}
+class PlatinumJobCard <T extends Job> {
+ +setJobType(Class<T> jobTypeClass)
+ +startJob()
+}
+
+class MaintenanceJob implements Job {
+ +getJobType()
+}
+class RepairJob  implements Job {
+ +getJobType()
+}
+class PaintJob  implements Job {
+ +getJobType()
+}
+PlatinumJobCard -up-> MaintenanceJob:creates
+PlatinumJobCard -up-> RepairJob:creates
+PlatinumJobCard -up-> PaintJob:creates
+
+
+@enduml

core-java-modules/core-java-reflection-2/src/main/resources/Silver.puml

@@ -0,0 +1,20 @@
+@startuml
+'https://plantuml.com/class-diagram
+
+class SilverJobCard {
+ -Object jobType
+ +setJobType(Class jobTypeClass);
+ +startJob();
+}
+
+class MaintenanceJob {
+ +getJobType();
+}
+class RepairJob {
+ +getJobType();
+}
+SilverJobCard -left-> MaintenanceJob:creates
+SilverJobCard -right-> RepairJob:creates
+
+
+@enduml

core-java-modules/core-java-reflection-2/src/test/java/com/baeldung/reflection/createobject/CreateObjectBasicUnitTest.java

@@ -0,0 +1,67 @@
+package com.baeldung.reflection.createobject;
+
+import com.baeldung.reflection.createobject.basic.*;
+import org.junit.jupiter.api.Test;
+
+import java.lang.reflect.InvocationTargetException;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class CreateObjectBasicUnitTest {
+    @Test
+    public void givenBronzeJobCard_whenJobTypeRepairAndMaintenance_thenStartJob() throws ClassNotFoundException,
+            InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException {
+
+        BronzeJobCard bronzeJobCard1 = new BronzeJobCard();
+        bronzeJobCard1.setJobType("com.baeldung.reflection.createobject.basic.RepairJob");
+        assertEquals("Start Bronze Repair Job", bronzeJobCard1.startJob());
+
+        BronzeJobCard bronzeJobCard2 = new BronzeJobCard();
+        bronzeJobCard2.setJobType("com.baeldung.reflection.createobject.basic.MaintenanceJob");
+        assertEquals("Start Bronze Maintenance Job", bronzeJobCard2.startJob());
+    }
+    @Test
+    public void givenBronzeJobCard_whenJobTypePaint_thenFailJob() throws ClassNotFoundException,
+            InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException {
+
+        BronzeJobCard bronzeJobCard = new BronzeJobCard();
+        bronzeJobCard.setJobType("com.baeldung.reflection.createobject.basic.PaintJob");
+        assertEquals("Bronze Job Failed", bronzeJobCard.startJob());
+    }
+    @Test
+    public void givenSilverJobCard_whenJobTypeRepairAndMaintenance_thenStartJob() throws InvocationTargetException,
+            NoSuchMethodException, InstantiationException, IllegalAccessException {
+
+        SilverJobCard silverJobCard1 = new SilverJobCard();
+        silverJobCard1.setJobType(RepairJob.class);
+        assertEquals("Start Silver Repair Job", silverJobCard1.startJob());
+
+        SilverJobCard silverJobCard2 = new SilverJobCard();
+        silverJobCard2.setJobType(MaintenanceJob.class);
+        assertEquals("Start Silver Maintenance Job", silverJobCard2.startJob());
+    }
+    @Test
+    public void givenSilverJobCard_whenJobTypePaint_thenFailJob() throws ClassNotFoundException,
+            InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException {
+
+        SilverJobCard silverJobCard = new SilverJobCard();
+        silverJobCard.setJobType(PaintJob.class);
+        assertEquals("Silver Job Failed", silverJobCard.startJob());
+    }
+    @Test
+    public void givenGoldJobCard_whenJobTypeRepairMaintenanceAndPaint_thenStartJob() throws InvocationTargetException,
+            NoSuchMethodException, InstantiationException, IllegalAccessException {
+
+        GoldJobCard<RepairJob> goldJobCard1 = new GoldJobCard<RepairJob>();
+        goldJobCard1.setJobType(RepairJob.class);
+        assertEquals("Start Gold Repair Job", goldJobCard1.startJob());
+
+        GoldJobCard<MaintenanceJob> goldJobCard2 = new GoldJobCard<MaintenanceJob>();
+        goldJobCard2.setJobType(MaintenanceJob.class);
+        assertEquals("Start Gold Maintenance Job", goldJobCard2.startJob());
+
+        GoldJobCard<PaintJob> goldJobCard3 = new GoldJobCard<PaintJob>();
+        goldJobCard3.setJobType(PaintJob.class);
+        assertEquals("Start Gold Paint Job", goldJobCard3.startJob());
+    }
+}

core-java-modules/core-java-reflection-2/src/test/java/com/baeldung/reflection/createobject/CreateObjectSpecialUnitTest.java

@@ -0,0 +1,29 @@
+package com.baeldung.reflection.createobject;
+
+import com.baeldung.reflection.createobject.special.MaintenanceJob;
+import com.baeldung.reflection.createobject.special.PaintJob;
+import com.baeldung.reflection.createobject.special.PlatinumJobCard;
+import com.baeldung.reflection.createobject.special.RepairJob;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import org.junit.jupiter.api.Test;
+
+import java.lang.reflect.InvocationTargetException;
+
+public class CreateObjectSpecialUnitTest {
+    @Test
+    public void givenPlatinumJobCard_whenJobTypeRepairMaintenanceAndPaint_thenStartJob() throws InvocationTargetException,
+            NoSuchMethodException, InstantiationException, IllegalAccessException {
+
+        PlatinumJobCard<RepairJob> platinumJobCard1 = new PlatinumJobCard<RepairJob>();
+        platinumJobCard1.setJobType(RepairJob.class);
+        assertEquals("Start Platinum Repair Job", platinumJobCard1.startJob());
+
+        PlatinumJobCard<MaintenanceJob> platinumJobCard2 = new PlatinumJobCard<MaintenanceJob>();
+        platinumJobCard2.setJobType(MaintenanceJob.class);
+        assertEquals("Start Platinum Maintenance Job", platinumJobCard2.startJob());
+
+        PlatinumJobCard<PaintJob> platinumJobCard3 = new PlatinumJobCard<PaintJob>();
+        platinumJobCard3.setJobType(PaintJob.class);
+        assertEquals("Start Platinum Paint Job", platinumJobCard3.startJob());
+    }
+}