TSK-1168: made interfaces of entities clonable

lib/taskana-core/src/main/java/pro/taskana/classification/api/models/Classification.java

@@ -177,4 +177,11 @@ public interface Classification extends ClassificationSummary {
    * @return the ClassificationSummary object for the current classification
    */
   ClassificationSummary asSummary();
+
+  /**
+   * Duplicates this Classification
+   *
+   * @return a copy of this Classification
+   */
+  Classification clone();
 }

lib/taskana-core/src/main/java/pro/taskana/classification/api/models/ClassificationSummary.java

@@ -4,7 +4,7 @@ package pro.taskana.classification.api.models;
  * Interface for ClassificationSummaries. This is a specific short model-object which only requieres
  * the most important informations. Specific ones can be load afterwards via ID.
  */
-public interface ClassificationSummary {
+public interface ClassificationSummary extends Cloneable {
 
   /**
    * Gets the id of the classification.
@@ -63,8 +63,8 @@ public interface ClassificationSummary {
   String getParentKey();
 
   /**
-   * Gets the service level of the classification. It is a String in ISO-8601 duration
-   * format. See the parse() method of {@code Duration} for details.
+   * Gets the service level of the classification. It is a String in ISO-8601 duration format. See
+   * the parse() method of {@code Duration} for details.
    *
    * @return the service level
    */
@@ -139,4 +139,11 @@ public interface ClassificationSummary {
    * @return custom8
    */
   String getCustom8();
+
+  /**
+   * Duplicates this ClassificationSummary
+   *
+   * @return a copy of this ClassificationSummary
+   */
+  ClassificationSummary clone();
 }

lib/taskana-core/src/main/java/pro/taskana/classification/internal/models/ClassificationImpl.java

@@ -16,30 +16,12 @@ public class ClassificationImpl extends ClassificationSummaryImpl implements Cla
 
   public ClassificationImpl() {}
 
-  public ClassificationImpl(ClassificationImpl classification) {
-    this.id = classification.getId();
-    this.key = classification.getKey();
-    this.parentId = classification.getParentId();
-    this.parentKey = classification.getParentKey();
-    this.category = classification.getCategory();
-    this.type = classification.getType();
-    this.domain = classification.getDomain();
-    this.isValidInDomain = classification.getIsValidInDomain();
-    this.created = classification.getCreated();
-    this.modified = classification.getModified();
-    this.name = classification.getName();
-    this.description = classification.getDescription();
-    this.priority = classification.getPriority();
-    this.serviceLevel = classification.getServiceLevel();
-    this.applicationEntryPoint = classification.getApplicationEntryPoint();
-    this.custom1 = classification.getCustom1();
-    this.custom2 = classification.getCustom2();
-    this.custom3 = classification.getCustom3();
-    this.custom4 = classification.getCustom4();
-    this.custom5 = classification.getCustom5();
-    this.custom6 = classification.getCustom6();
-    this.custom7 = classification.getCustom7();
-    this.custom8 = classification.getCustom8();
+  private ClassificationImpl(ClassificationImpl copyFrom) {
+    super(copyFrom);
+    isValidInDomain = copyFrom.isValidInDomain;
+    created = copyFrom.created;
+    modified = copyFrom.modified;
+    description = copyFrom.description;
   }
 
   @Override
@@ -119,10 +101,14 @@ public class ClassificationImpl extends ClassificationSummaryImpl implements Cla
     return (other instanceof ClassificationImpl);
   }
 
+  @Override
+  public ClassificationImpl clone() {
+    return new ClassificationImpl(this);
+  }
+
   @Override
   public int hashCode() {
-    return Objects.hash(
-        super.hashCode(), isValidInDomain, created, modified, description);
+    return Objects.hash(super.hashCode(), isValidInDomain, created, modified, description);
   }
 
   @Override

lib/taskana-core/src/main/java/pro/taskana/classification/internal/models/ClassificationSummaryImpl.java

@@ -29,6 +29,28 @@ public class ClassificationSummaryImpl implements ClassificationSummary {
 
   public ClassificationSummaryImpl() {}
 
+  protected ClassificationSummaryImpl(ClassificationSummaryImpl copyFrom) {
+    id = copyFrom.id;
+    applicationEntryPoint = copyFrom.applicationEntryPoint;
+    category = copyFrom.category;
+    domain = copyFrom.domain;
+    key = copyFrom.key;
+    name = copyFrom.name;
+    parentId = copyFrom.parentId;
+    parentKey = copyFrom.parentKey;
+    priority = copyFrom.priority;
+    serviceLevel = copyFrom.serviceLevel;
+    type = copyFrom.type;
+    custom1 = copyFrom.custom1;
+    custom2 = copyFrom.custom2;
+    custom3 = copyFrom.custom3;
+    custom4 = copyFrom.custom4;
+    custom5 = copyFrom.custom5;
+    custom6 = copyFrom.custom6;
+    custom7 = copyFrom.custom7;
+    custom8 = copyFrom.custom8;
+  }
+
   @Override
   public String getId() {
     return id;
@@ -97,16 +119,28 @@ public class ClassificationSummaryImpl implements ClassificationSummary {
     return parentKey;
   }
 
+  public void setParentKey(String parentKey) {
+    this.parentKey = parentKey;
+  }
+
   @Override
   public String getServiceLevel() {
     return serviceLevel;
   }
 
+  public void setServiceLevel(String serviceLevel) {
+    this.serviceLevel = serviceLevel;
+  }
+
   @Override
   public String getApplicationEntryPoint() {
     return this.applicationEntryPoint;
   }
 
+  public void setApplicationEntryPoint(String applicationEntryPoint) {
+    this.applicationEntryPoint = applicationEntryPoint;
+  }
+
   @Override
   public int getPriority() {
     return priority;
@@ -188,22 +222,15 @@ public class ClassificationSummaryImpl implements ClassificationSummary {
     this.custom8 = custom8;
   }
 
-  public void setApplicationEntryPoint(String applicationEntryPoint) {
-    this.applicationEntryPoint = applicationEntryPoint;
-  }
-
-  public void setServiceLevel(String serviceLevel) {
-    this.serviceLevel = serviceLevel;
-  }
-
-  public void setParentKey(String parentKey) {
-    this.parentKey = parentKey;
-  }
-
   protected boolean canEqual(Object other) {
     return (other instanceof ClassificationSummaryImpl);
   }
 
+  @Override
+  public ClassificationSummaryImpl clone() {
+    return new ClassificationSummaryImpl(this);
+  }
+
   @Override
   public int hashCode() {
     return Objects.hash(

lib/taskana-core/src/main/java/pro/taskana/task/api/models/Attachment.java

@@ -57,4 +57,11 @@ public interface Attachment extends AttachmentSummary {
    * @return the AttachmentSummary object for the current attachment
    */
   AttachmentSummary asSummary();
+
+  /**
+   * Duplicates this Attachment
+   *
+   * @return a copy of this Attachment
+   */
+  Attachment clone();
 }

lib/taskana-core/src/main/java/pro/taskana/task/api/models/AttachmentSummary.java

@@ -8,7 +8,7 @@ import pro.taskana.classification.api.models.ClassificationSummary;
  * Interface for AttachmentSummaries. This is a specific short model-object which only contains the
  * most important information.
  */
-public interface AttachmentSummary {
+public interface AttachmentSummary extends Cloneable {
 
   /**
    * Gets the id of the attachment.
@@ -65,4 +65,11 @@ public interface AttachmentSummary {
    * @return received Instant
    */
   Instant getReceived();
+
+  /**
+   * Duplicates this AttachmentSummary
+   *
+   * @return a copy of this AttachmentSummary
+   */
+  AttachmentSummary clone();
 }

lib/taskana-core/src/main/java/pro/taskana/task/api/models/ObjectReference.java

@@ -7,7 +7,7 @@ import org.slf4j.LoggerFactory;
 import pro.taskana.common.api.exceptions.InvalidArgumentException;
 
 /** ObjectReference entity. */
-public class ObjectReference {
+public class ObjectReference implements Cloneable {
   private static final Logger LOGGER = LoggerFactory.getLogger(ObjectReference.class);
   private String id;
   private String company;
@@ -16,6 +16,44 @@ public class ObjectReference {
   private String type;
   private String value;
 
+  public ObjectReference() {}
+
+  private ObjectReference(ObjectReference copyFrom) {
+    id = copyFrom.id;
+    company = copyFrom.company;
+    system = copyFrom.system;
+    systemInstance = copyFrom.systemInstance;
+    type = copyFrom.type;
+    value = copyFrom.value;
+  }
+
+  public static void validate(ObjectReference objectReference, String objRefType, String objName)
+      throws InvalidArgumentException {
+    LOGGER.debug("entry to validateObjectReference()");
+    // check that all values in the ObjectReference are set correctly
+    if (objectReference == null) {
+      throw new InvalidArgumentException(
+          String.format("ObectReferenc %s of %s must not be null.", objRefType, objName));
+    } else if (objectReference.getCompany() == null || objectReference.getCompany().length() == 0) {
+      throw new InvalidArgumentException(
+          String.format("Company of %s of %s must not be empty", objRefType, objName));
+    } else if (objectReference.getSystem() == null || objectReference.getSystem().length() == 0) {
+      throw new InvalidArgumentException(
+          String.format("System of %s of %s must not be empty", objRefType, objName));
+    } else if (objectReference.getSystemInstance() == null
+        || objectReference.getSystemInstance().length() == 0) {
+      throw new InvalidArgumentException(
+          String.format("SystemInstance of %s of %s must not be empty", objRefType, objName));
+    } else if (objectReference.getType() == null || objectReference.getType().length() == 0) {
+      throw new InvalidArgumentException(
+          String.format("Type of %s of %s must not be empty", objRefType, objName));
+    } else if (objectReference.getValue() == null || objectReference.getValue().length() == 0) {
+      throw new InvalidArgumentException(
+          String.format("Value of %s of %s must not be empty", objRefType, objName));
+    }
+    LOGGER.debug("exit from validateObjectReference()");
+  }
+
   public String getId() {
     return id;
   }
@@ -64,31 +102,9 @@ public class ObjectReference {
     this.value = value;
   }
 
-  public static void validate(ObjectReference objectReference, String objRefType, String objName)
-      throws InvalidArgumentException {
-    LOGGER.debug("entry to validateObjectReference()");
-    // check that all values in the ObjectReference are set correctly
-    if (objectReference == null) {
-      throw new InvalidArgumentException(
-          String.format("ObectReferenc %s of %s must not be null.", objRefType, objName));
-    } else if (objectReference.getCompany() == null || objectReference.getCompany().length() == 0) {
-      throw new InvalidArgumentException(
-          String.format("Company of %s of %s must not be empty", objRefType, objName));
-    } else if (objectReference.getSystem() == null || objectReference.getSystem().length() == 0) {
-      throw new InvalidArgumentException(
-          String.format("System of %s of %s must not be empty", objRefType, objName));
-    } else if (objectReference.getSystemInstance() == null
-        || objectReference.getSystemInstance().length() == 0) {
-      throw new InvalidArgumentException(
-          String.format("SystemInstance of %s of %s must not be empty", objRefType, objName));
-    } else if (objectReference.getType() == null || objectReference.getType().length() == 0) {
-      throw new InvalidArgumentException(
-          String.format("Type of %s of %s must not be empty", objRefType, objName));
-    } else if (objectReference.getValue() == null || objectReference.getValue().length() == 0) {
-      throw new InvalidArgumentException(
-          String.format("Value of %s of %s must not be empty", objRefType, objName));
-    }
-    LOGGER.debug("exit from validateObjectReference()");
+  @Override
+  protected ObjectReference clone() {
+    return new ObjectReference(this);
   }
 
   @Override

lib/taskana-core/src/main/java/pro/taskana/task/api/models/Task.java

@@ -187,4 +187,11 @@ public interface Task extends TaskSummary {
    * @return classificationCategory
    */
   String getClassificationCategory();
+
+  /**
+   * Duplicates this Task
+   *
+   * @return a copy of this Task
+   */
+  Task clone();
 }

lib/taskana-core/src/main/java/pro/taskana/task/api/models/TaskComment.java

@@ -3,7 +3,7 @@ package pro.taskana.task.api.models;
 import java.time.Instant;
 
 /** TaskComment-Interface to specify TaskComment Attributes. */
-public interface TaskComment {
+public interface TaskComment extends Cloneable {
 
   /**
    * Gets the id of the task comment.
@@ -33,11 +33,8 @@ public interface TaskComment {
    */
   String getTextField();
 
-  /**
-   * Sets the text field of the task comment.
-   *
+  /** Sets the text field of the task comment. */
    * @param textField the text field
-   */
   void setTextField(String textField);
 
   /**
@@ -54,6 +51,10 @@ public interface TaskComment {
    */
   Instant getModified();
 
-
-
+  /**
+   * Duplicates this TaskComment
+   *
+   * @return a copy of this TaskComment
+   */
+  TaskComment clone();
 }

lib/taskana-core/src/main/java/pro/taskana/task/api/models/TaskSummary.java

@@ -12,7 +12,7 @@ import pro.taskana.workbasket.api.models.WorkbasketSummary;
  * Interface for TaskSummary. This is a specific short model-object which only contains the most
  * important information.
  */
-public interface TaskSummary {
+public interface TaskSummary extends Cloneable {
 
   /**
    * Gets the id of the task.
@@ -192,4 +192,11 @@ public interface TaskSummary {
    * @throws InvalidArgumentException if num has not a value of "1", "2" ... "16"
    */
   String getCustomAttribute(String num) throws InvalidArgumentException;
+
+  /**
+   * Duplicates this TaskSummary
+   *
+   * @return a copy of this TaskSummary
+   */
+  TaskSummary clone();
 }

lib/taskana-core/src/main/java/pro/taskana/task/internal/models/AttachmentImpl.java

@@ -18,6 +18,11 @@ public class AttachmentImpl extends AttachmentSummaryImpl implements Attachment
 
   public AttachmentImpl() {}
 
+  private AttachmentImpl(AttachmentImpl copyFrom) {
+    super(copyFrom);
+    customAttributes = new HashMap<>(copyFrom.customAttributes);
+  }
+
   @Override
   public Map<String, String> getCustomAttributes() {
     if (customAttributes == null) {
@@ -49,6 +54,11 @@ public class AttachmentImpl extends AttachmentSummaryImpl implements Attachment
     return (!(other instanceof AttachmentImpl));
   }
 
+  @Override
+  public AttachmentImpl clone() {
+    return new AttachmentImpl(this);
+  }
+
   @Override
   public int hashCode() {
     return Objects.hash(super.hashCode(), customAttributes);

lib/taskana-core/src/main/java/pro/taskana/task/internal/models/AttachmentSummaryImpl.java

@@ -22,6 +22,17 @@ public class AttachmentSummaryImpl implements AttachmentSummary {
 
   AttachmentSummaryImpl() {}
 
+  protected AttachmentSummaryImpl(AttachmentSummaryImpl copyFrom) {
+    id = copyFrom.id;
+    taskId = copyFrom.taskId;
+    created = copyFrom.created;
+    modified = copyFrom.modified;
+    classificationSummary = copyFrom.classificationSummary;
+    objectReference = copyFrom.objectReference;
+    channel = copyFrom.channel;
+    received = copyFrom.received;
+  }
+
   /*
    * (non-Javadoc)
    * @see pro.taskana.impl.AttachmentSummary#getId()
@@ -96,6 +107,10 @@ public class AttachmentSummaryImpl implements AttachmentSummary {
     return channel;
   }
 
+  public void setChannel(String channel) {
+    this.channel = channel;
+  }
+
   /*
    * (non-Javadoc)
    * @see pro.taskana.impl.AttachmentSummary#getClassification()
@@ -122,10 +137,6 @@ public class AttachmentSummaryImpl implements AttachmentSummary {
     this.received = received;
   }
 
-  public void setChannel(String channel) {
-    this.channel = channel;
-  }
-
   // auxiliary method to enable MyBatis access to classificationSummary
   @SuppressWarnings("unused")
   public ClassificationSummaryImpl getClassificationSummaryImpl() {
@@ -142,6 +153,11 @@ public class AttachmentSummaryImpl implements AttachmentSummary {
     return (!(other instanceof AttachmentSummaryImpl));
   }
 
+  @Override
+  public AttachmentSummaryImpl clone() {
+    return new AttachmentSummaryImpl(this);
+  }
+
   @Override
   public int hashCode() {
     return Objects.hash(

lib/taskana-core/src/main/java/pro/taskana/task/internal/models/TaskCommentImpl.java

@@ -14,6 +14,17 @@ public class TaskCommentImpl implements TaskComment {
   private Instant created;
   private Instant modified;
 
+  public TaskCommentImpl() {}
+
+  private TaskCommentImpl(TaskCommentImpl copyFrom) {
+    id = copyFrom.id;
+    taskId = copyFrom.taskId;
+    textField = copyFrom.textField;
+    creator = copyFrom.creator;
+    created = copyFrom.created;
+    modified = copyFrom.modified;
+  }
+
   @Override
   public String getId() {
     return id;
@@ -45,6 +56,10 @@ public class TaskCommentImpl implements TaskComment {
     return textField;
   }
 
+  public void setTextField(String textField) {
+    this.textField = textField;
+  }
+
   @Override
   public Instant getCreated() {
     return created;
@@ -63,23 +78,18 @@ public class TaskCommentImpl implements TaskComment {
     this.modified = modified;
   }
 
-  public void setTextField(String textField) {
-    this.textField = textField;
-  }
-
   protected boolean canEqual(Object other) {
     return (other instanceof TaskCommentImpl);
   }
 
+  @Override
+  public TaskCommentImpl clone() {
+    return new TaskCommentImpl(this);
+  }
+
   @Override
   public int hashCode() {
-    return Objects.hash(
-        id,
-        taskId,
-        textField,
-        creator,
-        created,
-        modified);
+    return Objects.hash(id, taskId, textField, creator, created, modified);
   }
 
   @Override

lib/taskana-core/src/main/java/pro/taskana/task/internal/models/TaskImpl.java

@@ -29,6 +29,14 @@ public class TaskImpl extends TaskSummaryImpl implements Task {
 
   public TaskImpl() {}
 
+  private TaskImpl(TaskImpl copyFrom) {
+    super(copyFrom);
+    customAttributes = new HashMap<>(copyFrom.customAttributes);
+    callbackInfo = new HashMap<>(copyFrom.callbackInfo);
+    callbackState = copyFrom.callbackState;
+    attachments = new ArrayList<>(copyFrom.attachments);
+  }
+
   public CallbackState getCallbackState() {
     return callbackState;
   }
@@ -170,6 +178,14 @@ public class TaskImpl extends TaskSummaryImpl implements Task {
     return attachments;
   }
 
+  public void setAttachments(List<Attachment> attachments) {
+    if (attachments != null) {
+      this.attachments = attachments;
+    } else if (this.attachments == null) {
+      this.attachments = new ArrayList<>();
+    }
+  }
+
   @Override
   public TaskSummary asSummary() {
     TaskSummaryImpl taskSummary = new TaskSummaryImpl();
@@ -246,14 +262,6 @@ public class TaskImpl extends TaskSummaryImpl implements Task {
     ((ClassificationSummaryImpl) this.classificationSummary).setCategory(classificationCategory);
   }
 
-  public void setAttachments(List<Attachment> attachments) {
-    if (attachments != null) {
-      this.attachments = attachments;
-    } else if (this.attachments == null) {
-      this.attachments = new ArrayList<>();
-    }
-  }
-
   public String getClassificationId() {
     return classificationSummary == null ? null : classificationSummary.getId();
   }
@@ -262,6 +270,11 @@ public class TaskImpl extends TaskSummaryImpl implements Task {
     return (other instanceof TaskImpl);
   }
 
+  @Override
+  public TaskImpl clone() {
+    return new TaskImpl(this);
+  }
+
   @Override
   public int hashCode() {
     return Objects.hash(

lib/taskana-core/src/main/java/pro/taskana/task/internal/models/TaskSummaryImpl.java

@@ -64,6 +64,48 @@ public class TaskSummaryImpl implements TaskSummary {
 
   public TaskSummaryImpl() {}
 
+  protected TaskSummaryImpl(TaskSummaryImpl copyFrom) {
+    id = copyFrom.id;
+    externalId = copyFrom.externalId;
+    created = copyFrom.created;
+    claimed = copyFrom.claimed;
+    completed = copyFrom.completed;
+    modified = copyFrom.modified;
+    planned = copyFrom.planned;
+    due = copyFrom.due;
+    name = copyFrom.name;
+    creator = copyFrom.creator;
+    note = copyFrom.note;
+    description = copyFrom.description;
+    priority = copyFrom.priority;
+    state = copyFrom.state;
+    classificationSummary = copyFrom.classificationSummary;
+    workbasketSummary = copyFrom.workbasketSummary;
+    businessProcessId = copyFrom.businessProcessId;
+    parentBusinessProcessId = copyFrom.parentBusinessProcessId;
+    owner = copyFrom.owner;
+    primaryObjRef = copyFrom.primaryObjRef;
+    isRead = copyFrom.isRead;
+    isTransferred = copyFrom.isTransferred;
+    attachmentSummaries = new ArrayList<>(copyFrom.attachmentSummaries);
+    custom1 = copyFrom.custom1;
+    custom2 = copyFrom.custom2;
+    custom3 = copyFrom.custom3;
+    custom4 = copyFrom.custom4;
+    custom5 = copyFrom.custom5;
+    custom6 = copyFrom.custom6;
+    custom7 = copyFrom.custom7;
+    custom8 = copyFrom.custom8;
+    custom9 = copyFrom.custom9;
+    custom10 = copyFrom.custom10;
+    custom11 = copyFrom.custom11;
+    custom12 = copyFrom.custom12;
+    custom13 = copyFrom.custom13;
+    custom14 = copyFrom.custom14;
+    custom15 = copyFrom.custom15;
+    custom16 = copyFrom.custom16;
+  }
+
   /*
    * (non-Javadoc)
    * @see pro.taskana.TaskSummary#getTaskId()
@@ -99,6 +141,10 @@ public class TaskSummaryImpl implements TaskSummary {
     return creator;
   }
 
+  public void setCreator(String creator) {
+    this.creator = creator;
+  }
+
   /*
    * (non-Javadoc)
    * @see pro.taskana.TaskSummary#getCreated()
@@ -276,6 +322,10 @@ public class TaskSummaryImpl implements TaskSummary {
     return attachmentSummaries;
   }
 
+  public void setAttachmentSummaries(List<AttachmentSummary> attachmentSummaries) {
+    this.attachmentSummaries = attachmentSummaries;
+  }
+
   /*
    * (non-Javadoc)
    * @see pro.taskana.TaskSummary#getDomain()
@@ -422,14 +472,6 @@ public class TaskSummaryImpl implements TaskSummary {
     }
   }
 
-  public void setAttachmentSummaries(List<AttachmentSummary> attachmentSummaries) {
-    this.attachmentSummaries = attachmentSummaries;
-  }
-
-  public void setCreator(String creator) {
-    this.creator = creator;
-  }
-
   // utility method to allow mybatis access to workbasketSummary
   public WorkbasketSummaryImpl getWorkbasketSummaryImpl() {
     return (WorkbasketSummaryImpl) workbasketSummary;
@@ -605,6 +647,11 @@ public class TaskSummaryImpl implements TaskSummary {
     return (other instanceof TaskSummaryImpl);
   }
 
+  @Override
+  public TaskSummaryImpl clone() {
+    return new TaskSummaryImpl(this);
+  }
+
   @Override
   public int hashCode() {
     return Objects.hash(

lib/taskana-core/src/main/java/pro/taskana/workbasket/api/models/Workbasket.java

@@ -126,4 +126,11 @@ public interface Workbasket extends WorkbasketSummary {
    * @return the WorkbasketSummary object for the current work basket
    */
   WorkbasketSummary asSummary();
+
+  /**
+   * Duplicates this Workbasket
+   *
+   * @return a copy of this Workbasket
+   */
+  Workbasket clone();
 }

lib/taskana-core/src/main/java/pro/taskana/workbasket/api/models/WorkbasketAccessItem.java

@@ -6,7 +6,7 @@ package pro.taskana.workbasket.api.models;
  *
  * @author bbr
  */
-public interface WorkbasketAccessItem {
+public interface WorkbasketAccessItem extends Cloneable {
 
   /**
    * Returns the current id of the WorkbasketAccessItem.
@@ -315,4 +315,11 @@ public interface WorkbasketAccessItem {
    * @param permCustom12 specifies whether custom12 permission is granted
    */
   void setPermCustom12(boolean permCustom12);
+
+  /**
+   * Duplicates this WorkbasketAccessItem
+   *
+   * @return a copy of this WorkbasketAccessItem
+   */
+  WorkbasketAccessItem clone();
 }

lib/taskana-core/src/main/java/pro/taskana/workbasket/api/models/WorkbasketSummary.java

@@ -6,7 +6,7 @@ import pro.taskana.workbasket.api.WorkbasketType;
  * Interface for WorkbasketSummary. This is a specific short model-object which only contains the
  * most important information.
  */
-public interface WorkbasketSummary {
+public interface WorkbasketSummary extends Cloneable {
 
   /**
    * Gets the id of the workbasket.
@@ -119,4 +119,11 @@ public interface WorkbasketSummary {
    * @return the workbasket's markedForDeletion property
    */
   boolean isMarkedForDeletion();
+
+  /**
+   * Duplicates this WorkbasketSummary
+   *
+   * @return a copy of this WorkbasketSummary
+   */
+  WorkbasketSummary clone();
 }

lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/models/WorkbasketAccessItemImpl.java

@@ -30,8 +30,31 @@ public class WorkbasketAccessItemImpl implements WorkbasketAccessItem {
   private boolean permCustom11;
   private boolean permCustom12;
 
-  public WorkbasketAccessItemImpl() {
-    super();
+  public WorkbasketAccessItemImpl() {}
+
+  private WorkbasketAccessItemImpl(WorkbasketAccessItemImpl copyFrom) {
+    id = copyFrom.id;
+    workbasketId = copyFrom.workbasketId;
+    workbasketKey = copyFrom.workbasketKey;
+    accessId = copyFrom.accessId;
+    accessName = copyFrom.accessName;
+    permRead = copyFrom.permRead;
+    permOpen = copyFrom.permOpen;
+    permAppend = copyFrom.permAppend;
+    permTransfer = copyFrom.permTransfer;
+    permDistribute = copyFrom.permDistribute;
+    permCustom1 = copyFrom.permCustom1;
+    permCustom2 = copyFrom.permCustom2;
+    permCustom3 = copyFrom.permCustom3;
+    permCustom4 = copyFrom.permCustom4;
+    permCustom5 = copyFrom.permCustom5;
+    permCustom6 = copyFrom.permCustom6;
+    permCustom7 = copyFrom.permCustom7;
+    permCustom8 = copyFrom.permCustom8;
+    permCustom9 = copyFrom.permCustom9;
+    permCustom10 = copyFrom.permCustom10;
+    permCustom11 = copyFrom.permCustom11;
+    permCustom12 = copyFrom.permCustom12;
   }
 
   /*
@@ -406,6 +429,11 @@ public class WorkbasketAccessItemImpl implements WorkbasketAccessItem {
     this.permCustom12 = permCustom12;
   }
 
+  @Override
+  public WorkbasketAccessItemImpl clone() {
+    return new WorkbasketAccessItemImpl(this);
+  }
+
   @Override
   public int hashCode() {
     return Objects.hash(

lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/models/WorkbasketImpl.java

@@ -14,6 +14,12 @@ public class WorkbasketImpl extends WorkbasketSummaryImpl implements Workbasket
 
   public WorkbasketImpl() {}
 
+  private WorkbasketImpl(WorkbasketImpl copyFrom) {
+    super(copyFrom);
+    created = copyFrom.created;
+    modified = copyFrom.modified;
+  }
+
   @Override
   public Instant getCreated() {
     return created;
@@ -99,6 +105,11 @@ public class WorkbasketImpl extends WorkbasketSummaryImpl implements Workbasket
     return Objects.equals(created, other.created) && Objects.equals(modified, other.modified);
   }
 
+  @Override
+  public WorkbasketImpl clone() {
+    return new WorkbasketImpl(this);
+  }
+
   @Override
   public String toString() {
     return "WorkbasketImpl [id="

lib/taskana-core/src/main/java/pro/taskana/workbasket/internal/models/WorkbasketSummaryImpl.java

@@ -27,6 +27,25 @@ public class WorkbasketSummaryImpl implements WorkbasketSummary {
 
   public WorkbasketSummaryImpl() {}
 
+  protected WorkbasketSummaryImpl(WorkbasketSummaryImpl copyFrom) {
+    id = copyFrom.id;
+    key = copyFrom.key;
+    name = copyFrom.name;
+    description = copyFrom.description;
+    owner = copyFrom.owner;
+    domain = copyFrom.domain;
+    type = copyFrom.type;
+    custom1 = copyFrom.custom1;
+    custom2 = copyFrom.custom2;
+    custom3 = copyFrom.custom3;
+    custom4 = copyFrom.custom4;
+    orgLevel1 = copyFrom.orgLevel1;
+    orgLevel2 = copyFrom.orgLevel2;
+    orgLevel3 = copyFrom.orgLevel3;
+    orgLevel4 = copyFrom.orgLevel4;
+    markedForDeletion = copyFrom.markedForDeletion;
+  }
+
   /*
    * (non-Javadoc)
    * @see pro.taskana.impl.WorkbasketSummary#getId()
@@ -286,6 +305,11 @@ public class WorkbasketSummaryImpl implements WorkbasketSummary {
         && Objects.equals(orgLevel4, other.orgLevel4);
   }
 
+  @Override
+  public WorkbasketSummaryImpl clone() {
+    return new WorkbasketSummaryImpl(this);
+  }
+
   @Override
   public String toString() {
     return "WorkbasketSummaryImpl [id="