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/GitLabApiException.java

@@ -22,8 +22,8 @@ import com.fasterxml.jackson.databind.JsonNode;
  * with a GitLab API endpoint.
  */
 public class GitLabApiException extends Exception {
-
     private static final long serialVersionUID = 1L;
+
     private StatusType statusInfo;
     private int httpStatus;
     private String message;

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

 package org.gitlab4j.api.models;
 
-import java.util.Date;
-import java.util.List;
-import java.util.Map;
-
-import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
-import org.gitlab4j.api.utils.JacksonJson;
-
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonValue;
+import org.gitlab4j.api.utils.JacksonJson;
+import org.gitlab4j.api.utils.JacksonJsonEnumHelper;
+
+import java.io.Serializable;
+import java.util.Date;
+import java.util.List;
+import java.util.Map;
 
-public class AbstractEpic<E extends AbstractEpic<E>> extends AbstractMinimalEpic<E> {
+public class AbstractEpic<E extends AbstractEpic<E>> extends AbstractMinimalEpic<E> implements Serializable {
+    private static final long serialVersionUID = 1L;
 
-   public enum EpicState {
+    public enum EpicState {
         OPENED, CLOSED, ALL;
 
        private static JacksonJsonEnumHelper<EpicState> enumHelper = new JacksonJsonEnumHelper<>(EpicState.class);

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

 
 package org.gitlab4j.api.models;
 
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import org.gitlab4j.api.utils.JacksonJson;
 
-import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import java.io.Serializable;
 
 @JsonIgnoreProperties(ignoreUnknown = true)
-public abstract class AbstractGroup<G extends AbstractGroup<G>> {
+public abstract class AbstractGroup<G extends AbstractGroup<G>> implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private Long id;
     private String name;

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

 
 package org.gitlab4j.api.models;
 
-import java.util.Date;
-import java.util.List;
-
-import org.gitlab4j.api.Constants.IssueState;
-import org.gitlab4j.api.utils.JacksonJson;
-
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.databind.node.IntNode;
 import com.fasterxml.jackson.databind.node.LongNode;
 import com.fasterxml.jackson.databind.node.TextNode;
 import com.fasterxml.jackson.databind.node.ValueNode;
+import org.gitlab4j.api.Constants.IssueState;
+import org.gitlab4j.api.utils.JacksonJson;
+
+import java.io.Serializable;
+import java.util.Date;
+import java.util.List;
 
-public abstract class AbstractIssue {
+public abstract class AbstractIssue implements Serializable {
+    private static final long serialVersionUID = 1L;
 
-    public static class TaskCompletionStatus {
+    public static class TaskCompletionStatus implements Serializable {
+        private static final long serialVersionUID = 1L;
 
         private Integer count;
         private Integer completedCount;

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

@@ -2,7 +2,10 @@ package org.gitlab4j.api.models;
 
 import org.gitlab4j.api.utils.JacksonJson;
 
-public class AbstractMinimalEpic<E extends AbstractMinimalEpic<E>> {
+import java.io.Serializable;
+
+public class AbstractMinimalEpic<E extends AbstractMinimalEpic<E>> implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private Long id;
     private Long iid;

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

 package org.gitlab4j.api.models;
 
-import java.util.Date;
-
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import org.gitlab4j.api.utils.JacksonJson;
 
-import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import java.io.Serializable;
+import java.util.Date;
 
 @JsonIgnoreProperties(ignoreUnknown = true)
-public abstract class AbstractUser<U extends AbstractUser<U>> {
+public abstract class AbstractUser<U extends AbstractUser<U>> implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private String avatarUrl;
     private Date createdAt;

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

@@ -2,7 +2,10 @@ package org.gitlab4j.api.models;
 
 import org.gitlab4j.api.GitLabApiForm;
 
-public class AcceptMergeRequestParams {
+import java.io.Serializable;
+
+public class AcceptMergeRequestParams implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private String mergeCommitMessage;
     private Boolean mergeWhenPipelineSucceeds;

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

@@ -3,6 +3,7 @@ package org.gitlab4j.api.models;
 import java.util.Date;
 
 public class AccessRequest extends AbstractUser<AccessRequest> {
+    private static final long serialVersionUID = 1L;
 
     private Date requestedAt;
     private AccessLevel accessLevel;

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

@@ -2,11 +2,14 @@ package org.gitlab4j.api.models;
 
 import org.gitlab4j.api.GitLabApiForm;
 
+import java.io.Serializable;
+
 /**
  * This class is used by the ProtectedBranchesAPi to set up the
  * allowed_to_push, allowed_to_merge, and allowed_to_unprotect values.
  */
-public class AllowedTo {
+public class AllowedTo implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private AccessLevel accessLevel;
     private Long userId;

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

 package org.gitlab4j.api.models;
 
-public class Application {
+import java.io.Serializable;
+
+public class Application implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private Long id;
     private String applicationId;

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

 package org.gitlab4j.api.models;
 
+import java.io.Serializable;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.Map;
@@ -17,7 +18,8 @@ import com.fasterxml.jackson.databind.node.IntNode;
 import com.fasterxml.jackson.databind.node.NullNode;
 import com.fasterxml.jackson.databind.node.TextNode;
 
-public class ApplicationSettings {
+public class ApplicationSettings implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private Long id;
     private Date createdAt;

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

@@ -2,9 +2,11 @@ package org.gitlab4j.api.models;
 
 import org.gitlab4j.api.utils.JacksonJson;
 
+import java.io.Serializable;
 import java.util.List;
 
-public class ApprovalRule {
+public class ApprovalRule implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private Long id;
     private String name;

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

 package org.gitlab4j.api.models;
 
+import java.io.Serializable;
 import java.util.List;
 
 import org.gitlab4j.api.GitLabApiForm;
 
-public class ApprovalRuleParams {
+public class ApprovalRuleParams implements Serializable {
+    private static final long serialVersionUID = 1L;
 
-	private Integer approvalsRequired;
+    private Integer approvalsRequired;
     private String name;
     private Boolean appliesToAllProtectedBranches;
     private List<Long> groupIds;

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

 package org.gitlab4j.api.models;
 
-import java.util.List;
-
 import org.gitlab4j.api.utils.JacksonJson;
 
-public class ApprovalState {
+import java.io.Serializable;
+import java.util.List;
+
+public class ApprovalState implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private Boolean approvalRulesOverwritten;
     private List<ApprovalRule> rules;

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

 
 package org.gitlab4j.api.models;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import org.gitlab4j.api.utils.JacksonJson;
 
-import com.fasterxml.jackson.annotation.JsonIgnore;
+import java.io.Serializable;
 
 /**
  * This class is used by various models to represent the approved_by property,
@@ -11,7 +12,8 @@ import com.fasterxml.jackson.annotation.JsonIgnore;
  *
  * @since 4.19.0
  */
-public class ApprovedBy {
+public class ApprovedBy implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     private User user;
     private Group group;

src/main/java/org/gitlab4j/api/models/Artifact.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 Artifact {
+public class Artifact implements Serializable {
+    private static final long serialVersionUID = 1L;
 
     public enum FileType {
         ARCHIVE, METADATA, TRACE, JUNIT;

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

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

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

 package org.gitlab4j.api.models;
 
-import java.util.List;
-
 import org.gitlab4j.api.Constants.ArchiveFormat;
 import org.gitlab4j.api.utils.JacksonJson;
 
+import java.io.Serializable;
+import java.util.List;
+
 /**
  * This class is part of the Release class model.
  */
-public class Assets {
+public class Assets implements Serializable {
+    private static final long serialVersionUID = 1L;
 
-    public static class Source {
+    public static class Source implements Serializable {
+        private static final long serialVersionUID = 1L;
 
         private ArchiveFormat format;
         private String url;
@@ -37,7 +40,8 @@ public class Assets {
         }
     }
 
-    public static class Link {
+    public static class Link implements Serializable {
+        private static final long serialVersionUID = 1L;
 
         private Long id;
         private String name;

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

@@ -4,6 +4,7 @@ package org.gitlab4j.api.models;
 import org.gitlab4j.api.utils.JacksonJson;
 
 public class Assignee extends AbstractUser<Assignee> {
+    private static final long serialVersionUID = 1L;
 
     @Override
     public String toString() {

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

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