Use the interface in the data beans.

Kitodo-DataManagement/src/main/java/org/kitodo/data/database/beans/BaseBean.java

@@ -23,22 +23,25 @@
 
 import org.hibernate.Hibernate;
 import org.kitodo.data.database.persistence.BaseDAO;
+import org.kitodo.data.interfaces.DataInterface;
 
 /**
  * Base bean class.
  */
 @MappedSuperclass
-public abstract class BaseBean implements Serializable {
+public abstract class BaseBean implements DataInterface, Serializable {
 
     @Id
     @Column(name = "id")
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     protected Integer id;
 
+    @Override
     public Integer getId() {
         return id;
     }
 
+    @Override
     public void setId(Integer id) {
         this.id = id;
     }

Kitodo-DataManagement/src/main/java/org/kitodo/data/database/beans/Batch.java

@@ -29,6 +29,8 @@
 
 import org.kitodo.data.database.enums.BatchType;
 import org.kitodo.data.database.persistence.BatchDAO;
+import org.kitodo.data.interfaces.BatchInterface;
+import org.kitodo.data.interfaces.ProcessInterface;
 
 /**
  * A user-definable, unordered collection of processes whose batch-type tasks
@@ -39,7 +41,7 @@
  */
 @Entity
 @Table(name = "batch")
-public class Batch extends BaseIndexedBean {
+public class Batch extends BaseIndexedBean implements BatchInterface {
 
     /**
      * The batch title. Using titles for batches is optional, the field may be
@@ -105,22 +107,12 @@ public Batch(String title, Collection<? extends Process> processes) {
         this.processes = new ArrayList<>(processes);
     }
 
-    /**
-     * Returns the batch title. Using titles for batches is optional, the field
-     * may be {@code null}. If so, the function returns null.
-     *
-     * @return the batch title
-     */
+    @Override
     public String getTitle() {
         return title;
     }
 
-    /**
-     * Sets a batch title.
-     *
-     * @param title
-     *            title of the batch
-     */
+    @Override
     public void setTitle(String title) {
         this.title = title;
     }
@@ -134,11 +126,7 @@ public BatchType getType() {
         return type;
     }
 
-    /**
-     * Return the processes that belong to the batch.
-     *
-     * @return the processes of the batch
-     */
+    @Override
     public List<Process> getProcesses() {
         initialize(new BatchDAO(), this.processes);
         if (Objects.isNull(this.processes)) {
@@ -147,18 +135,14 @@ public List<Process> getProcesses() {
         return this.processes;
     }
 
-    /**
-     * Sets the processes that belong to the batch.
-     *
-     * @param processes
-     *            processes of the batch
-     */
-    public void setProcesses(List<Process> processes) {
+    @Override
+    @SuppressWarnings("unchecked")
+    public void setProcesses(List<? extends ProcessInterface> processes) {
         if (this.processes == null) {
-            this.processes = processes;
+            this.processes = (List<Process>) processes;
         } else {
             this.processes.clear();
-            this.processes.addAll(processes);
+            this.processes.addAll((List<? extends Process>) processes);
         }
     }
 

Kitodo-DataManagement/src/main/java/org/kitodo/data/database/beans/Client.java

@@ -22,13 +22,17 @@
 import javax.persistence.JoinColumn;
 import javax.persistence.JoinTable;
 import javax.persistence.ManyToMany;
+import javax.persistence.OneToMany;
 import javax.persistence.Table;
 
 import org.kitodo.data.database.persistence.ClientDAO;
+import org.kitodo.data.interfaces.ClientInterface;
+import org.kitodo.data.interfaces.ProjectInterface;
+import org.kitodo.data.interfaces.UserInterface;
 
 @Entity
 @Table(name = "client")
-public class Client extends BaseBean {
+public class Client extends BaseBean implements ClientInterface {
 
     @Column(name = "name")
     private String name;
@@ -40,21 +44,18 @@ public class Client extends BaseBean {
                     foreignKey = @ForeignKey(name = "FK_column_id"))})
     private List<ListColumn> listColumns;
 
-    /**
-     * Gets name.
-     *
-     * @return The name.
-     */
+    @ManyToMany(mappedBy = "clients", cascade = CascadeType.PERSIST)
+    private List<User> users;
+
+    @OneToMany(mappedBy = "client", cascade = CascadeType.ALL, orphanRemoval = true)
+    private List<Project> projects;
+
+    @Override
     public String getName() {
         return name;
     }
 
-    /**
-     * Sets name.
-     *
-     * @param name
-     *            The name.
-     */
+    @Override
     public void setName(String name) {
         this.name = name;
     }
@@ -99,4 +100,26 @@ public List<ListColumn> getListColumns() {
     public void setListColumns(List<ListColumn> columns) {
         this.listColumns = columns;
     }
+
+    @Override
+    public List<User> getUsers() {
+        return users;
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public void setUsers(List<? extends UserInterface> users) {
+        this.users = (List<User>) users;
+    }
+
+    @Override
+    public List<Project> getProjects() {
+        return projects;
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public void setProjects(List<? extends ProjectInterface> projects) {
+        this.projects = (List<Project>) projects;
+    }
 }

Kitodo-DataManagement/src/main/java/org/kitodo/data/database/beans/Docket.java

@@ -20,9 +20,12 @@
 import javax.persistence.ManyToOne;
 import javax.persistence.Table;
 
+import org.kitodo.data.interfaces.ClientInterface;
+import org.kitodo.data.interfaces.DocketInterface;
+
 @Entity
 @Table(name = "docket")
-public class Docket extends BaseIndexedBean {
+public class Docket extends BaseIndexedBean implements DocketInterface {
 
     @Column(name = "title")
     private String title;
@@ -37,18 +40,22 @@ public class Docket extends BaseIndexedBean {
     @JoinColumn(name = "client_id", foreignKey = @ForeignKey(name = "FK_docket_client_id"))
     private Client client;
 
+    @Override
     public String getTitle() {
         return title;
     }
 
+    @Override
     public void setTitle(String title) {
         this.title = title;
     }
 
+    @Override
     public String getFile() {
         return file;
     }
 
+    @Override
     public void setFile(String file) {
         this.file = file;
     }
@@ -74,23 +81,14 @@ public void setActive(boolean active) {
         this.active = active;
     }
 
-    /**
-     * Get client.
-     *
-     * @return Client object
-     */
+    @Override
     public Client getClient() {
         return this.client;
     }
 
-    /**
-     * Set client.
-     *
-     * @param client
-     *            as Client object
-     */
-    public void setClient(Client client) {
-        this.client = client;
+    @Override
+    public void setClient(ClientInterface client) {
+        this.client = (Client) client;
     }
 
     @Override

Kitodo-DataManagement/src/main/java/org/kitodo/data/database/beans/Filter.java

@@ -21,12 +21,14 @@
 import javax.persistence.ManyToOne;
 import javax.persistence.Table;
 
+import org.kitodo.data.interfaces.FilterInterface;
+
 /**
  * Filter bean.
  */
 @Entity
 @Table(name = "filter")
-public class Filter extends BaseIndexedBean {
+public class Filter extends BaseIndexedBean implements FilterInterface {
 
     @Column(name = "value", columnDefinition = "longtext")
     private String value;
@@ -38,21 +40,12 @@ public class Filter extends BaseIndexedBean {
     @JoinColumn(name = "user_id", foreignKey = @ForeignKey(name = "FK_filter_user_id"))
     private User user;
 
-    /**
-     * Get filter value.
-     *
-     * @return filter value
-     */
+    @Override
     public String getValue() {
         return value;
     }
 
-    /**
-     * Set filter value.
-     *
-     * @param value
-     *            filter
-     */
+    @Override
     public void setValue(String value) {
         this.value = value;
     }