src/main/java/net/hostsharing/hsadminng/hs/office/contact/HsOfficeContactController.java

@@ -14,6 +14,9 @@ import org.springframework.web.servlet.mvc.method.annotation.MvcUriComponentsBui
 
 import java.util.List;
 import java.util.UUID;
+import java.util.function.BiConsumer;
+
+import static net.hostsharing.hsadminng.mapper.KeyValueMap.from;
 
 @RestController
 
@@ -51,7 +54,7 @@ public class HsOfficeContactController implements HsOfficeContactsApi {
 
         context.define(currentUser, assumedRoles);
 
-        final var entityToSave = mapper.map(body, HsOfficeContactEntity.class);
+        final var entityToSave = mapper.map(body, HsOfficeContactEntity.class, RESOURCE_TO_ENTITY_POSTMAPPER);
 
         final var saved = contactRepo.save(entityToSave);
 
@@ -108,10 +111,15 @@ public class HsOfficeContactController implements HsOfficeContactsApi {
 
         final var current = contactRepo.findByUuid(contactUuid).orElseThrow();
 
-        new HsOfficeContactEntityPatch(current).apply(body);
+        new HsOfficeContactEntityPatcher(current).apply(body);
 
         final var saved = contactRepo.save(current);
         final var mapped = mapper.map(saved, HsOfficeContactResource.class);
         return ResponseEntity.ok(mapped);
     }
+
+    @SuppressWarnings("unchecked")
+    final BiConsumer<HsOfficeContactInsertResource, HsOfficeContactEntity> RESOURCE_TO_ENTITY_POSTMAPPER = (resource, entity) -> {
+        entity.putEmailAdresses(from(resource.getEmailAddresses()));
+    };
 }

src/main/java/net/hostsharing/hsadminng/hs/office/contact/HsOfficeContactEntity.java

@@ -1,17 +1,22 @@
 package net.hostsharing.hsadminng.hs.office.contact;
 
+import io.hypersistence.utils.hibernate.type.json.JsonType;
 import lombok.*;
 import lombok.experimental.FieldNameConstants;
 import net.hostsharing.hsadminng.errors.DisplayName;
+import net.hostsharing.hsadminng.mapper.PatchableMapWrapper;
 import net.hostsharing.hsadminng.rbac.rbacobject.RbacObject;
 import net.hostsharing.hsadminng.rbac.rbacdef.RbacView;
 import net.hostsharing.hsadminng.rbac.rbacdef.RbacView.SQL;
 import net.hostsharing.hsadminng.stringify.Stringify;
 import net.hostsharing.hsadminng.stringify.Stringifyable;
 import org.hibernate.annotations.GenericGenerator;
+import org.hibernate.annotations.Type;
 
 import jakarta.persistence.*;
 import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.UUID;
 
 import static net.hostsharing.hsadminng.rbac.rbacdef.RbacView.GLOBAL;
@@ -48,13 +53,27 @@ public class HsOfficeContactEntity implements Stringifyable, RbacObject {
     private String label;
 
     @Column(name = "postaladdress")
-    private String postalAddress; // TODO.spec: check if we really want multiple, if so: JSON-Array or Postgres-Array?
+    private String postalAddress; // multiline free-format text
 
-    @Column(name = "emailaddresses", columnDefinition = "json")
+    @Builder.Default
-    private String emailAddresses; // TODO.spec: check if we can really add multiple. format: ["eins@...", "zwei@..."]
+    @Setter(AccessLevel.NONE)
+    @Type(JsonType.class)
+    @Column(name = "emailaddresses")
+    private Map<String, String> emailAddresses = new HashMap<>();
+
+    @Transient
+    private PatchableMapWrapper<String> emailAddressesWrapper;
+
+    public PatchableMapWrapper<String> getEmailAdresses() {
+        return PatchableMapWrapper.of(emailAddressesWrapper, (newWrapper) -> {emailAddressesWrapper = newWrapper; }, emailAddresses );
+    }
+
+    public void putEmailAdresses(Map<String, String> newEmailAddresses) {
+        getEmailAdresses().assign(newEmailAddresses);
+    }
 
     @Column(name = "phonenumbers", columnDefinition = "json")
-    private String phoneNumbers; // TODO.spec: check if we can really add multiple. format: { "office": "+49 40 12345-10", "fax": "+49 40 12345-05" }
+    private String phoneNumbers;
 
     @Override
     public String toString() {

src/main/java/net/hostsharing/hsadminng/hs/office/contact/HsOfficeContactEntityPatcher.java

@@ -1,14 +1,17 @@
 package net.hostsharing.hsadminng.hs.office.contact;
 
 import net.hostsharing.hsadminng.mapper.EntityPatcher;
+import net.hostsharing.hsadminng.mapper.KeyValueMap;
 import net.hostsharing.hsadminng.mapper.OptionalFromJson;
 import net.hostsharing.hsadminng.hs.office.generated.api.v1.model.HsOfficeContactPatchResource;
 
-class HsOfficeContactEntityPatch implements EntityPatcher<HsOfficeContactPatchResource> {
+import java.util.Optional;
+
+class HsOfficeContactEntityPatcher implements EntityPatcher<HsOfficeContactPatchResource> {
 
     private final HsOfficeContactEntity entity;
 
-    HsOfficeContactEntityPatch(final HsOfficeContactEntity entity) {
+    HsOfficeContactEntityPatcher(final HsOfficeContactEntity entity) {
         this.entity = entity;
     }
 
@@ -16,7 +19,8 @@ class HsOfficeContactEntityPatch implements EntityPatcher<HsOfficeContactPatchRe
     public void apply(final HsOfficeContactPatchResource resource) {
         OptionalFromJson.of(resource.getLabel()).ifPresent(entity::setLabel);
         OptionalFromJson.of(resource.getPostalAddress()).ifPresent(entity::setPostalAddress);
-        OptionalFromJson.of(resource.getEmailAddresses()).ifPresent(entity::setEmailAddresses);
+        Optional.ofNullable(resource.getEmailAddresses())
+                .ifPresent(r -> entity.getEmailAdresses().patch(KeyValueMap.from(resource.getEmailAddresses())));
         OptionalFromJson.of(resource.getPhoneNumbers()).ifPresent(entity::setPhoneNumbers);
     }
 }

src/main/java/net/hostsharing/hsadminng/mapper/KeyValueMap.java

@@ -5,9 +5,9 @@ import java.util.Map;
 public class KeyValueMap {
 
     @SuppressWarnings("unchecked")
-    public static Map<String, Object> from(final Object obj) {
+    public static <T> Map<String, T> from(final Object obj) {
         if (obj instanceof Map<?, ?>) {
-            return (Map<String, Object>) obj;
+            return (Map<String, T>) obj;
         }
         throw new ClassCastException("Map expected, but got: " + obj);
     }

src/main/java/net/hostsharing/hsadminng/mapper/PatchMap.java

@@ -12,19 +12,19 @@ import static java.util.Arrays.stream;
  * This is a map which can take key-value-pairs where the value can be null
  * thus JSON nullable object structures from HTTP PATCH can be represented.
  */
-public class PatchMap extends TreeMap<String, Object> {
+public class PatchMap<T> extends TreeMap<String, T> {
 
-    public PatchMap(final ImmutablePair<String, Object>[] entries) {
+    public PatchMap(final ImmutablePair<String, T>[] entries) {
         stream(entries).forEach(r -> put(r.getKey(), r.getValue()));
     }
 
     @SafeVarargs
-    public static Map<String, Object> patchMap(final ImmutablePair<String, Object>... entries) {
+    public static <T> Map<String, T> patchMap(final ImmutablePair<String, Object>... entries) {
         return new PatchMap(entries);
     }
 
     @NotNull
-    public static ImmutablePair<String, Object> entry(final String key, final Object value) {
+    public static <T> ImmutablePair<String, T> entry(final String key, final T value) {
         return new ImmutablePair<>(key, value);
     }
 }

src/main/java/net/hostsharing/hsadminng/stringify/Stringify.java

@@ -4,7 +4,9 @@ import net.hostsharing.hsadminng.errors.DisplayName;
 
 import jakarta.validation.constraints.NotNull;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.List;
+import java.util.Map;
 import java.util.Objects;
 import java.util.Optional;
 import java.util.function.Function;
@@ -62,6 +64,7 @@ public final class Stringify<B> {
         final var propValues = props.stream()
                 .map(prop -> PropertyValue.of(prop, prop.getter.apply(object)))
                 .filter(Objects::nonNull)
+                .filter(PropertyValue::nonEmpty)
                 .map(propVal -> {
                     if (propVal.rawValue instanceof Stringifyable stringifyable) {
                         return new PropertyValue<>(propVal.prop, propVal.rawValue, stringifyable.toShortString());
@@ -110,5 +113,12 @@ public final class Stringify<B> {
         static <B> PropertyValue<B> of(Property<B> prop, Object rawValue) {
             return rawValue != null ? new PropertyValue<>(prop, rawValue, rawValue.toString()) : null;
         }
+
+        boolean nonEmpty() {
+            return rawValue != null &&
+                    (!(rawValue instanceof Collection<?> c) || !c.isEmpty()) &&
+                    (!(rawValue instanceof Map<?,?> m) || !m.isEmpty()) &&
+                    (!(rawValue instanceof String s) || !s.isEmpty());
+        }
     }
 }

src/main/resources/api-definition/hs-office/hs-office-contact-schemas.yaml

@@ -14,7 +14,7 @@ components:
                 postalAddress:
                     type: string
                 emailAddresses:
-                    type: string
+                    $ref: '#/components/schemas/HsOfficeContactEmailAddresses'
                 phoneNumbers:
                     type: string
 
@@ -26,7 +26,7 @@ components:
                 postalAddress:
                     type: string
                 emailAddresses:
-                    type: string
+                    $ref: '#/components/schemas/HsOfficeContactEmailAddresses'
                 phoneNumbers:
                     type: string
             required:
@@ -42,8 +42,13 @@ components:
                     type: string
                     nullable: true
                 emailAddresses:
-                    type: string
+                    $ref: '#/components/schemas/HsOfficeContactEmailAddresses'
-                    nullable: true
                 phoneNumbers:
                     type: string
                     nullable: true
+
+        HsOfficeContactEmailAddresses:
+            # forces generating a java.lang.Object containing a Map, instead of class HsOfficeContactEmailAddresses
+            anyOf:
+                - type: object
+                  additionalProperties: true

src/main/resources/db/changelog/5-hs-office/501-contact/5010-hs-office-contact.sql

@@ -10,8 +10,8 @@ create table if not exists hs_office_contact
     version        int not null default 0,
     label          varchar(128) not null,
     postalAddress  text,
-    emailAddresses text, -- TODO.feat: change to json
+    emailAddresses jsonb not null,
-    phoneNumbers   text  -- TODO.feat: change to json
+    phoneNumbers   text
 );
 --//
 

src/main/resources/db/changelog/5-hs-office/501-contact/5018-hs-office-contact-test-data.sql

@@ -12,6 +12,7 @@ create or replace procedure createHsOfficeContactTestData(contLabel varchar)
     language plpgsql as $$
 declare
     currentTask     varchar;
+    postalAddr      varchar;
     emailAddr       varchar;
 begin
     currentTask = 'creating contact test-data ' || contLabel;
@@ -22,14 +23,17 @@ begin
     perform createRbacUser(emailAddr);
     call defineContext(currentTask, null, emailAddr);
 
+    postalAddr := E'Vorname Nachname\nStraße Hnr\nPLZ Stadt';
+
     raise notice 'creating test contact: %', contLabel;
     insert
         into hs_office_contact (label, postaladdress, emailaddresses, phonenumbers)
-        values (contLabel, $address$
+        values (
-Vorname Nachname
+            contLabel,
-Straße Hnr
+            postalAddr,
-PLZ Stadt
+            ('{ "main": "' || emailAddr || '" }')::jsonb,
-$address$, emailAddr, '+49 123 1234567');
+            '+49 123 1234567'
+        );
 end; $$;
 --//
 

src/test/java/net/hostsharing/hsadminng/hs/office/contact/HsOfficeContactControllerAcceptanceTest.java

@@ -19,6 +19,7 @@ import org.springframework.transaction.annotation.Transactional;
 
 import jakarta.persistence.EntityManager;
 import jakarta.persistence.PersistenceContext;
+import java.util.Map;
 import java.util.UUID;
 
 import static net.hostsharing.hsadminng.rbac.test.IsValidUuidMatcher.isUuidValid;
@@ -103,7 +104,9 @@ class HsOfficeContactControllerAcceptanceTest extends ContextBasedTestWithCleanu
                         .body("""
                                {
                                    "label": "Temp Contact",
-                                   "emailAddresses": "test@example.org"
+                                   "emailAddresses": {
+                                        "main": "test@example.org"
+                                   }
                                  }
                             """)
                         .port(port)
@@ -114,7 +117,7 @@ class HsOfficeContactControllerAcceptanceTest extends ContextBasedTestWithCleanu
                         .contentType(ContentType.JSON)
                         .body("uuid", isUuidValid())
                         .body("label", is("Temp Contact"))
-                        .body("emailAddresses", is("test@example.org"))
+                        .body("emailAddresses", is(Map.of("main", "test@example.org")))
                         .header("Location", startsWith("http://localhost"))
                     .extract().header("Location");  // @formatter:on
 
@@ -181,7 +184,9 @@ class HsOfficeContactControllerAcceptanceTest extends ContextBasedTestWithCleanu
                     .body("", lenientlyEquals("""
                     {
                         "label": "first contact",
-                         "emailAddresses": "contact-admin@firstcontact.example.com",
+                        "emailAddresses": {
+                            "main": "contact-admin@firstcontact.example.com"
+                        },
                         "phoneNumbers": "+49 123 1234567"
                      }
                     """)); // @formatter:on
@@ -204,7 +209,9 @@ class HsOfficeContactControllerAcceptanceTest extends ContextBasedTestWithCleanu
                     .body("""
                        {
                            "label": "Temp patched contact",
-                           "emailAddresses": "patched@example.org",
+                           "emailAddresses": {
+                                "main": "patched@example.org"
+                           },
                            "postalAddress": "Patched Address",
                            "phoneNumbers": "+01 100 123456"
                        }
@@ -217,7 +224,7 @@ class HsOfficeContactControllerAcceptanceTest extends ContextBasedTestWithCleanu
                     .contentType(ContentType.JSON)
                     .body("uuid", isUuidValid())
                     .body("label", is("Temp patched contact"))
-                    .body("emailAddresses", is("patched@example.org"))
+                    .body("emailAddresses", is(Map.of("main", "patched@example.org")))
                     .body("postalAddress", is("Patched Address"))
                     .body("phoneNumbers", is("+01 100 123456"));
                 // @formatter:on
@@ -227,7 +234,7 @@ class HsOfficeContactControllerAcceptanceTest extends ContextBasedTestWithCleanu
             assertThat(contactRepo.findByUuid(givenContact.getUuid())).isPresent().get()
                     .matches(person -> {
                         assertThat(person.getLabel()).isEqualTo("Temp patched contact");
-                        assertThat(person.getEmailAddresses()).isEqualTo("patched@example.org");
+                        assertThat(person.getEmailAddresses()).isEqualTo(Map.of("main", "patched@example.org"));
                         assertThat(person.getPostalAddress()).isEqualTo("Patched Address");
                         assertThat(person.getPhoneNumbers()).isEqualTo("+01 100 123456");
                         return true;
@@ -246,7 +253,9 @@ class HsOfficeContactControllerAcceptanceTest extends ContextBasedTestWithCleanu
                     .contentType(ContentType.JSON)
                     .body("""
                        {
-                           "emailAddresses": "patched@example.org",
+                           "emailAddresses": {
+                                "main": "patched@example.org"
+                           },
                            "phoneNumbers": "+01 100 123456"
                        }
                             """)
@@ -258,7 +267,7 @@ class HsOfficeContactControllerAcceptanceTest extends ContextBasedTestWithCleanu
                     .contentType(ContentType.JSON)
                     .body("uuid", isUuidValid())
                     .body("label", is(givenContact.getLabel()))
-                    .body("emailAddresses", is("patched@example.org"))
+                    .body("emailAddresses", is(Map.of("main", "patched@example.org")))
                     .body("postalAddress", is(givenContact.getPostalAddress()))
                     .body("phoneNumbers", is("+01 100 123456"));
             // @formatter:on
@@ -267,7 +276,7 @@ class HsOfficeContactControllerAcceptanceTest extends ContextBasedTestWithCleanu
             assertThat(contactRepo.findByUuid(givenContact.getUuid())).isPresent().get()
                     .matches(person -> {
                         assertThat(person.getLabel()).isEqualTo(givenContact.getLabel());
-                        assertThat(person.getEmailAddresses()).isEqualTo("patched@example.org");
+                        assertThat(person.getEmailAddresses()).isEqualTo(Map.of("main", "patched@example.org"));
                         assertThat(person.getPostalAddress()).isEqualTo(givenContact.getPostalAddress());
                         assertThat(person.getPhoneNumbers()).isEqualTo("+01 100 123456");
                         return true;
@@ -340,7 +349,7 @@ class HsOfficeContactControllerAcceptanceTest extends ContextBasedTestWithCleanu
             final var newContact = HsOfficeContactEntity.builder()
                     .uuid(UUID.randomUUID())
                     .label("Temp from " + Context.getCallerMethodNameFromStackFrame(1) )
-                    .emailAddresses(RandomStringUtils.randomAlphabetic(10) + "@example.org")
+                    .emailAddresses(Map.of("main", RandomStringUtils.randomAlphabetic(10) + "@example.org"))
                     .postalAddress("Postal Address " + RandomStringUtils.randomAlphabetic(10))
                     .phoneNumbers("+01 200 " + RandomStringUtils.randomNumeric(8))
                     .build();

src/test/java/net/hostsharing/hsadminng/hs/office/contact/HsOfficeContactEntityPatcherUnitTest.java

@@ -4,9 +4,12 @@ import net.hostsharing.hsadminng.rbac.test.PatchUnitTestBase;
 import net.hostsharing.hsadminng.hs.office.generated.api.v1.model.HsOfficeContactPatchResource;
 import org.junit.jupiter.api.TestInstance;
 
+import java.util.Map;
 import java.util.UUID;
 import java.util.stream.Stream;
 
+import static net.hostsharing.hsadminng.mapper.PatchMap.entry;
+import static net.hostsharing.hsadminng.mapper.PatchMap.patchMap;
 import static org.junit.jupiter.api.TestInstance.Lifecycle.PER_CLASS;
 
 @TestInstance(PER_CLASS)
@@ -16,13 +19,26 @@ class HsOfficeContactEntityPatcherUnitTest extends PatchUnitTestBase<
         > {
 
     private static final UUID INITIAL_CONTACT_UUID = UUID.randomUUID();
+    private static final  Map<String, String> PATCH_EMAIL_ADDRESSES = patchMap(
+            entry("main", "patched@example.com"),
+            entry("paul", null),
+            entry("suse", "suse@example.com")
+    );
+    private static final  Map<String, String> PATCHED_EMAIL_ADDRESSES = patchMap(
+            entry("main", "patched@example.com"),
+            entry("suse", "suse@example.com"),
+            entry("mila", "mila@example.com")
+    );
 
     @Override
     protected HsOfficeContactEntity newInitialEntity() {
         final var entity = new HsOfficeContactEntity();
         entity.setUuid(INITIAL_CONTACT_UUID);
         entity.setLabel("initial label");
-        entity.setEmailAddresses("initial@example.org");
+        entity.putEmailAdresses(Map.ofEntries(
+                entry("main", "initial@example.org"),
+                entry("paul", "paul@example.com"),
+                entry("mila", "mila@example.com")));
         entity.setPhoneNumbers("initial postal address");
         entity.setPostalAddress("+01 100 123456789");
         return entity;
@@ -34,8 +50,8 @@ class HsOfficeContactEntityPatcherUnitTest extends PatchUnitTestBase<
     }
 
     @Override
-    protected HsOfficeContactEntityPatch createPatcher(final HsOfficeContactEntity entity) {
+    protected HsOfficeContactEntityPatcher createPatcher(final HsOfficeContactEntity entity) {
-        return new HsOfficeContactEntityPatch(entity);
+        return new HsOfficeContactEntityPatcher(entity);
     }
 
     @Override
@@ -46,11 +62,13 @@ class HsOfficeContactEntityPatcherUnitTest extends PatchUnitTestBase<
                         HsOfficeContactPatchResource::setLabel,
                         "patched label",
                         HsOfficeContactEntity::setLabel),
-                new JsonNullableProperty<>(
+                new SimpleProperty<>(
-                        "emailAddresses",
+                        "resources",
                         HsOfficeContactPatchResource::setEmailAddresses,
-                        "patched trade name",
+                        PATCH_EMAIL_ADDRESSES,
-                        HsOfficeContactEntity::setEmailAddresses),
+                        HsOfficeContactEntity::putEmailAdresses,
+                        PATCHED_EMAIL_ADDRESSES)
+                        .notNullable(),
                 new JsonNullableProperty<>(
                         "phoneNumbers",
                         HsOfficeContactPatchResource::setPhoneNumbers,

src/test/java/net/hostsharing/hsadminng/hs/office/contact/TestHsOfficeContact.java

@@ -1,5 +1,6 @@
 package net.hostsharing.hsadminng.hs.office.contact;
 
+import java.util.Map;
 
 public class TestHsOfficeContact {
 
@@ -9,7 +10,7 @@ public class TestHsOfficeContact {
         return HsOfficeContactEntity.builder()
                 .label(label)
                 .postalAddress("address of " + label)
-                .emailAddresses(emailAddr)
+                .emailAddresses(Map.of("main", emailAddr))
                 .build();
     }
 }

src/test/java/net/hostsharing/hsadminng/hs/office/debitor/HsOfficeDebitorControllerAcceptanceTest.java

@@ -107,7 +107,7 @@ class HsOfficeDebitorControllerAcceptanceTest extends ContextBasedTestWithCleanu
                           "mark": null,
                           "contact": {
                             "label": "first contact",
-                            "emailAddresses": "contact-admin@firstcontact.example.com",
+                            "emailAddresses": { "main": "contact-admin@firstcontact.example.com" },
                             "phoneNumbers": "+49 123 1234567"
                           }
                         },
@@ -132,7 +132,7 @@ class HsOfficeDebitorControllerAcceptanceTest extends ContextBasedTestWithCleanu
                             "mark": null,
                             "contact": {
                               "label": "first contact",
-                              "emailAddresses": "contact-admin@firstcontact.example.com",
+                              "emailAddresses": { "main": "contact-admin@firstcontact.example.com" },
                               "phoneNumbers": "+49 123 1234567"
                             }
                           },
@@ -162,7 +162,9 @@ class HsOfficeDebitorControllerAcceptanceTest extends ContextBasedTestWithCleanu
                           "anchor": {"tradeName": "Second e.K."},
                           "holder": {"tradeName": "Second e.K."},
                           "type": "DEBITOR",
-                          "contact": {"emailAddresses": "contact-admin@secondcontact.example.com"}
+                          "contact": {
+                            "emailAddresses": { "main": "contact-admin@secondcontact.example.com" }
+                           }
                         },
                         "debitorNumber": 1000212,
                         "debitorNumberSuffix": 12,
@@ -172,7 +174,9 @@ class HsOfficeDebitorControllerAcceptanceTest extends ContextBasedTestWithCleanu
                             "anchor": {"tradeName": "Hostsharing eG"},
                             "holder": {"tradeName": "Second e.K."},
                             "type": "PARTNER",
-                            "contact": {"emailAddresses": "contact-admin@secondcontact.example.com"}
+                            "contact": {
+                                "emailAddresses": { "main": "contact-admin@secondcontact.example.com" }
+                            }
                           },
                           "details": {
                             "registrationOffice": "Hamburg",
@@ -192,7 +196,9 @@ class HsOfficeDebitorControllerAcceptanceTest extends ContextBasedTestWithCleanu
                           "anchor": {"tradeName": "Third OHG"},
                           "holder": {"tradeName": "Third OHG"},
                           "type": "DEBITOR",
-                          "contact": {"emailAddresses": "contact-admin@thirdcontact.example.com"}
+                          "contact": {
+                                "emailAddresses": { "main": "contact-admin@thirdcontact.example.com" }
+                            }
                         },
                         "debitorNumber": 1000313,
                         "debitorNumberSuffix": 13,
@@ -202,7 +208,9 @@ class HsOfficeDebitorControllerAcceptanceTest extends ContextBasedTestWithCleanu
                             "anchor": {"tradeName": "Hostsharing eG"},
                             "holder": {"tradeName": "Third OHG"},
                             "type": "PARTNER",
-                            "contact": {"emailAddresses": "contact-admin@thirdcontact.example.com"}
+                            "contact": {
+                                "emailAddresses": { "main": "contact-admin@thirdcontact.example.com" }
+                            }
                           },
                           "details": {
                             "registrationOffice": "Hamburg",
@@ -456,8 +464,8 @@ class HsOfficeDebitorControllerAcceptanceTest extends ContextBasedTestWithCleanu
                              "type": "DEBITOR",
                              "contact": {
                                  "label": "first contact",
-                                 "postalAddress": "\\nVorname Nachname\\nStraße Hnr\\nPLZ Stadt\\n",
+                                 "postalAddress": "Vorname Nachname\\nStraße Hnr\\nPLZ Stadt",
-                                 "emailAddresses": "contact-admin@firstcontact.example.com",
+                                 "emailAddresses": { "main": "contact-admin@firstcontact.example.com" },
                                  "phoneNumbers": "+49 123 1234567"
                              }
                          },
@@ -472,8 +480,8 @@ class HsOfficeDebitorControllerAcceptanceTest extends ContextBasedTestWithCleanu
                                  "mark": null,
                                  "contact": {
                                      "label": "first contact",
-                                     "postalAddress": "\\nVorname Nachname\\nStraße Hnr\\nPLZ Stadt\\n",
+                                     "postalAddress": "Vorname Nachname\\nStraße Hnr\\nPLZ Stadt",
-                                     "emailAddresses": "contact-admin@firstcontact.example.com",
+                                     "emailAddresses": { "main": "contact-admin@firstcontact.example.com" },
                                      "phoneNumbers": "+49 123 1234567"
                                  }
                              },