Add implements Serializable to all model classes to support native image (GraalVM) (#1074)

---------

Co-authored-by: Jeremie Bresson <jeremie.bresson@unblu.com>

src/main/java/org/gitlab4j/api/models/Link.java

@@ -2,10 +2,10 @@ package org.gitlab4j.api.models;
 
 import org.gitlab4j.api.utils.JacksonJson;
 
-import java.util.Date;
-import java.util.List;
+import java.io.Serializable;
 
-public class Link {
+public class Link implements Serializable{
+    private static final long serialVersionUID = 1L;
 
     private Integer id;
     private String name;

src/main/java/org/gitlab4j/api/models/Markdown.java

@@ -2,7 +2,10 @@ package org.gitlab4j.api.models;
 
 import org.gitlab4j.api.utils.JacksonJson;
 
-public class Markdown {
+import java.io.Serializable;
+
+public class Markdown implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private String html;
 

src/main/java/org/gitlab4j/api/models/MarkdownRequest.java

 package org.gitlab4j.api.models;
 
-public class MarkdownRequest {
+import java.io.Serializable;
+
+public class MarkdownRequest implements Serializable {
+    private static final long serialVersionUID = 1L;
+
     private String text;
     private boolean gfm;
 

src/main/java/org/gitlab4j/api/models/Member.java

 
 package org.gitlab4j.api.models;
 
-import java.util.Date;
-
 import org.gitlab4j.api.utils.JacksonJson;
 
+import java.util.Date;
+
 public class Member extends AbstractUser<Member> {
+    private static final long serialVersionUID = 1L;
 
     private AccessLevel accessLevel;
     private Date expiresAt;

src/main/java/org/gitlab4j/api/models/Membership.java

@@ -2,7 +2,10 @@ package org.gitlab4j.api.models;
 
 import org.gitlab4j.api.utils.JacksonJson;
 
-public class Membership {
+import java.io.Serializable;
+
+public class Membership implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private Long sourceId;
     private String sourceName;

src/main/java/org/gitlab4j/api/models/MergeRequest.java

 package org.gitlab4j.api.models;
 
-import java.util.Date;
-import java.util.List;
-
-import org.gitlab4j.api.utils.JacksonJson;
-
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import org.gitlab4j.api.utils.JacksonJson;
+
+import java.io.Serializable;
+import java.util.Date;
+import java.util.List;
 
-public class MergeRequest {
+public class MergeRequest implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private Boolean allowCollaboration;
     private Boolean allowMaintainerToPush;

src/main/java/org/gitlab4j/api/models/MergeRequestDiff.java

@@ -5,6 +5,7 @@ import java.util.List;
 import org.gitlab4j.api.utils.JacksonJson;
 
 public class MergeRequestDiff extends MergeRequestVersion {
+    private static final long serialVersionUID = 1L;
 
     private List<Commit> commits;
     private List<Diff> diffs;

src/main/java/org/gitlab4j/api/models/MergeRequestFilter.java

@@ -3,6 +3,7 @@ package org.gitlab4j.api.models;
 import static org.gitlab4j.api.Constants.MergeRequestScope.ALL;
 import static org.gitlab4j.api.Constants.MergeRequestScope.ASSIGNED_TO_ME;
 
+import java.io.Serializable;
 import java.util.Date;
 import java.util.List;
 
@@ -20,7 +21,8 @@ import com.fasterxml.jackson.annotation.JsonIgnore;
 /**
  * This class is used to filter merge requests when getting lists of them.
  */
-public class MergeRequestFilter {
+public class MergeRequestFilter implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private Long projectId;
     private Long groupId;

src/main/java/org/gitlab4j/api/models/MergeRequestParams.java

 package org.gitlab4j.api.models;
 
+import java.io.Serializable;
 import java.util.Arrays;
 import java.util.List;
 
@@ -9,7 +10,8 @@ import org.gitlab4j.api.GitLabApiForm;
 /**
  * This class provides the form parameters for creating and updating merge requests.
  */
-public class MergeRequestParams {
+public class MergeRequestParams implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private String sourceBranch;
     private String targetBranch;

src/main/java/org/gitlab4j/api/models/MergeRequestVersion.java

 package org.gitlab4j.api.models;
 
+import java.io.Serializable;
 import java.util.Date;
 
 import org.gitlab4j.api.utils.JacksonJson;
 
-public class MergeRequestVersion {
+public class MergeRequestVersion implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private Long id;
     private String headCommitSha;

src/main/java/org/gitlab4j/api/models/Metadata.java

@@ -3,7 +3,10 @@ package org.gitlab4j.api.models;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import org.gitlab4j.api.utils.JacksonJson;
 
-public class Metadata {
+import java.io.Serializable;
+
+public class Metadata implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private String version;
     private String revision;

src/main/java/org/gitlab4j/api/models/Milestone.java

 package org.gitlab4j.api.models;
 
-import java.util.Date;
-
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import org.gitlab4j.api.utils.JacksonJson;
 
-import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import java.io.Serializable;
+import java.util.Date;
 
-public class Milestone {
+public class Milestone implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private Date createdAt;
     private String description;

src/main/java/org/gitlab4j/api/models/Namespace.java

@@ -2,7 +2,10 @@ package org.gitlab4j.api.models;
 
 import org.gitlab4j.api.utils.JacksonJson;
 
-public class Namespace {
+import java.io.Serializable;
+
+public class Namespace implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private Long id;
     private String name;

src/main/java/org/gitlab4j/api/models/Note.java

 package org.gitlab4j.api.models;
 
-import java.util.Date;
-
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
 import org.gitlab4j.api.utils.JacksonJson;
 import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
 
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonValue;
+import java.io.Serializable;
+import java.util.Date;
 
-public class Note {
+public class Note implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     /** Enum to use for ordering the results. */
     public static enum OrderBy {

src/main/java/org/gitlab4j/api/models/NotificationSettings.java

 package org.gitlab4j.api.models;
 
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
 import org.gitlab4j.api.utils.JacksonJson;
 import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
 
-import com.fasterxml.jackson.annotation.JsonCreator;
-import com.fasterxml.jackson.annotation.JsonValue;
+import java.io.Serializable;
 
-public class NotificationSettings {
+public class NotificationSettings implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     /** Notification level */
     public static enum Level {
@@ -31,7 +33,8 @@ public class NotificationSettings {
         }
     }
 
-    public static class Events {
+    public static class Events implements Serializable {
+        private static final long serialVersionUID = 1L;
 
         private Boolean newNote;
         private Boolean newIssue;
@@ -180,4 +183,4 @@ public class NotificationSettings {
     public String toString() {
         return (JacksonJson.toJsonString(this));
     }
-}
+}
\ No newline at end of file

src/main/java/org/gitlab4j/api/models/OauthTokenResponse.java

 package org.gitlab4j.api.models;
 
-public class OauthTokenResponse {
+import java.io.Serializable;
+
+public class OauthTokenResponse implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private String accessToken;
     private String tokenType;

src/main/java/org/gitlab4j/api/models/Owner.java

 package org.gitlab4j.api.models;
 
 public class Owner extends AbstractUser<Owner> {
+    private static final long serialVersionUID = 1L;
 }

src/main/java/org/gitlab4j/api/models/Package.java

 package org.gitlab4j.api.models;
 
-import java.util.Date;
-
 import org.gitlab4j.api.utils.JacksonJson;
 
-public class Package {
+import java.io.Serializable;
+import java.util.Date;
+
+public class Package implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private Long id;
     private String name;
@@ -56,4 +58,4 @@ public class Package {
     public String toString() {
         return (JacksonJson.toJsonString(this));
     }
-}
+}
\ No newline at end of file

src/main/java/org/gitlab4j/api/models/PackageFile.java

 package org.gitlab4j.api.models;
 
+import java.io.Serializable;
 import java.util.Date;
 
 import org.gitlab4j.api.utils.JacksonJson;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
 
-public class PackageFile {
+public class PackageFile implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private Long id;
     private Long packageId;

src/main/java/org/gitlab4j/api/models/PackageFilter.java

 package org.gitlab4j.api.models;
 
-import org.gitlab4j.api.Constants.PackageStatus;
 import org.gitlab4j.api.Constants.PackageOrderBy;
+import org.gitlab4j.api.Constants.PackageStatus;
 import org.gitlab4j.api.Constants.SortOrder;
 import org.gitlab4j.api.GitLabApiForm;
 
+import java.io.Serializable;
+
 /**
  *  This class is used to filter Projects when getting lists of projects for a specified group.
  */
-public class PackageFilter {
+public class PackageFilter implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private Boolean excludeSubgroups;
     private PackageOrderBy orderBy;