Fixed bug in LocalizedStringType for null values

ccm-core/src/main/java/org/libreccm/l10n/LocalizedStringType.java

@@ -91,6 +91,9 @@ public class LocalizedStringType implements UserType {
         final int index,
         final SharedSessionContractImplementor session
     ) throws HibernateException, SQLException {
+        if (value == null) {
+            statement.setObject(index, null, Types.OTHER);
+        } else {
             final JsonObject jsonObject = ((LocalizedString) value).toJson();
             try (StringWriter strWriter = new StringWriter();
                  JsonWriter jsonWriter = Json.createWriter(strWriter)) {
@@ -100,6 +103,7 @@ public class LocalizedStringType implements UserType {
                 throw new HibernateException(ex);
             }
         }
+    }
 
     @Override
     public Object deepCopy(final Object value) throws HibernateException {

ccm-core/src/main/java/org/libreccm/security/Role.java

@@ -40,16 +40,12 @@ import java.util.List;
 import java.util.Objects;
 import java.util.Set;
 
-import javax.persistence.AssociationOverride;
 import javax.persistence.Column;
-import javax.persistence.Embedded;
 import javax.persistence.Entity;
 import javax.persistence.FetchType;
 import javax.persistence.GeneratedValue;
 import javax.persistence.GenerationType;
 import javax.persistence.Id;
-import javax.persistence.JoinColumn;
-import javax.persistence.JoinTable;
 import javax.persistence.NamedAttributeNode;
 import javax.persistence.NamedEntityGraph;
 import javax.persistence.NamedEntityGraphs;
@@ -186,7 +182,7 @@ public class Role implements Serializable, Exportable {
     @Column(name = "DESCRIPTION")
     @Type(type = "org.libreccm.l10n.LocalizedStringType")
     @XmlElement(name = "description", namespace = CORE_XML_NS)
-    private LocalizedString description = new LocalizedString();
+    private LocalizedString description;
 
     /**
      * All memberships of the roles.
@@ -195,7 +191,7 @@ public class Role implements Serializable, Exportable {
     @XmlElementWrapper(name = "role-memberships", namespace = CORE_XML_NS)
     @XmlElement(name = "role-membership", namespace = CORE_XML_NS)
     @JsonIgnore
-    private Set<RoleMembership> memberships = new HashSet<>();
+    private Set<RoleMembership> memberships;
 
     /**
      * Permissions granted to the role.
@@ -205,14 +201,18 @@ public class Role implements Serializable, Exportable {
     @XmlElementWrapper(name = "permissions", namespace = CORE_XML_NS)
     @XmlElement(name = "permission", namespace = CORE_XML_NS)
     @JsonIgnore
-    private List<Permission> permissions = new ArrayList<>();
+    private List<Permission> permissions;
 
     @OneToMany(mappedBy = "role", fetch = FetchType.LAZY)
     @JsonIgnore
-    private List<TaskAssignment> assignedTasks = new ArrayList<>();
+    private List<TaskAssignment> assignedTasks;
 
     public Role() {
         super();
+        description = new LocalizedString();
+        memberships = new HashSet<>();
+        permissions = new ArrayList<>();
+        assignedTasks = new ArrayList<>();
     }
 
     public long getRoleId() {
@@ -249,7 +249,7 @@ public class Role implements Serializable, Exportable {
     }
 
     protected void setMemberships(final Set<RoleMembership> memberships) {
-        this.memberships = memberships;
+        this.memberships = new HashSet<>(memberships);
     }
 
     protected void addMembership(final RoleMembership membership) {
@@ -269,7 +269,7 @@ public class Role implements Serializable, Exportable {
     }
 
     protected void setPermissions(final List<Permission> permissions) {
-        this.permissions = permissions;
+        this.permissions = new ArrayList<>(permissions);
     }
 
     protected void addPermission(final Permission permission) {
@@ -289,7 +289,7 @@ public class Role implements Serializable, Exportable {
     }
 
     protected void setAssignedTasks(final List<TaskAssignment> assignedTasks) {
-        this.assignedTasks = assignedTasks;
+        this.assignedTasks = new ArrayList<>(assignedTasks);
     }
 
     public void addAssignedTask(final TaskAssignment taskAssignment) {
@@ -301,7 +301,7 @@ public class Role implements Serializable, Exportable {
     }
 
     public LocalizedString getDescription() {
-        return this.description;
+        return description;
     }
 
     public void setDescription(final LocalizedString description) {

ccm-core/src/test/java/org/libreccm/modules/ConfigurationLoaderTest.java

@@ -123,7 +123,7 @@ public class ConfigurationLoaderTest {
     @Test
     @ShouldMatchDataSet(
         value = "datasets/org/libreccm/modules/ConfigurationLoaderTest/"
-                    + "after-load.yml",
+                    + "after-load.xml",
         excludeColumns = {"setting_id", "entry_id"})
     public void loadConfiguration() {
         final ConfigurationLoader confLoader = new ConfigurationLoader(

ccm-core/src/test/resources/datasets/org/libreccm/modules/ConfigurationLoaderTest/after-load.xml

@@ -5,7 +5,7 @@
         setting_id="120"
         configuration_class="org.libreccm.configuration.ExampleConfiguration"
         name="title"
-        setting_value_localized_string="{'de': 'Versuch', 'en': 'Test'}"
+        setting_value_localized_string='{"de": "Versuch", "en": "Test"}'
     />
     <ccm_core.settings
         dtype="BooleanSetting"