refactor: Objectを継承するJSONマッピング用のPOJOをNull-safeに

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Accept.kt

@@ -1,41 +1,46 @@
 package dev.usbharu.hideout.activitypub.domain.model
 
+import com.fasterxml.jackson.annotation.JsonCreator
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize
 import dev.usbharu.hideout.activitypub.domain.model.objects.Object
 import dev.usbharu.hideout.activitypub.domain.model.objects.ObjectDeserializer
 
-open class Accept : Object {
+open class Accept @JsonCreator constructor(
+    type: List<String> = emptyList(),
+    override val name: String,
     @JsonDeserialize(using = ObjectDeserializer::class)
     @Suppress("VariableNaming")
-    var `object`: Object? = null
+    var `object`: Object?,
-
+    override val actor: String
-    protected constructor()
+) : Object(
-    constructor(
+    type = add(type, "Accept")
-        type: List<String> = emptyList(),
+),
-        name: String,
+    HasActor,
-        `object`: Object?,
+    HasName {
-        actor: String?
-    ) : super(
-        type = add(type, "Accept"),
-        name = name,
-        actor = actor
-    ) {
-        this.`object` = `object`
-    }
-
-    override fun toString(): String = "Accept(`object`=$`object`) ${super.toString()}"
 
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
-        if (other !is Accept) return false
+        if (javaClass != other?.javaClass) return false
         if (!super.equals(other)) return false
 
-        return `object` == other.`object`
+        other as Accept
+
+        if (`object` != other.`object`) return false
+        if (actor != other.actor) return false
+        if (name != other.name) return false
+
+        return true
     }
 
     override fun hashCode(): Int {
         var result = super.hashCode()
         result = 31 * result + (`object`?.hashCode() ?: 0)
+        result = 31 * result + actor.hashCode()
+        result = 31 * result + name.hashCode()
         return result
     }
+
+    override fun toString(): String {
+        return "Accept(" + "`object`=$`object`, " + "actor='$actor', " + "name='$name'" + ")" + " ${super.toString()}"
+    }
 }

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Create.kt

@@ -4,46 +4,51 @@ import com.fasterxml.jackson.databind.annotation.JsonDeserialize
 import dev.usbharu.hideout.activitypub.domain.model.objects.Object
 import dev.usbharu.hideout.activitypub.domain.model.objects.ObjectDeserializer
 
-open class Create : Object {
+open class Create(
+    type: List<String> = emptyList(),
+    override val name: String,
     @JsonDeserialize(using = ObjectDeserializer::class)
     @Suppress("VariableNaming")
-    var `object`: Object? = null
+    var `object`: Object?,
-    var to: List<String> = emptyList()
+    override val actor: String,
+    override val id: String,
+    var to: List<String> = emptyList(),
     var cc: List<String> = emptyList()
-
+) : Object(
-    protected constructor() : super()
+    type = add(type, "Create")
-    constructor(
+),
-        type: List<String> = emptyList(),
+    HasId,
-        name: String? = null,
+    HasName,
-        `object`: Object?,
+    HasActor {
-        actor: String? = null,
-        id: String? = null,
-        to: List<String> = emptyList(),
-        cc: List<String> = emptyList()
-    ) : super(
-        type = add(type, "Create"),
-        name = name,
-        actor = actor,
-        id = id
-    ) {
-        this.`object` = `object`
-        this.to = to
-        this.cc = cc
-    }
 
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
-        if (other !is Create) return false
+        if (javaClass != other?.javaClass) return false
         if (!super.equals(other)) return false
 
-        return `object` == other.`object`
+        other as Create
+
+        if (`object` != other.`object`) return false
+        if (to != other.to) return false
+        if (cc != other.cc) return false
+        if (name != other.name) return false
+        if (actor != other.actor) return false
+        if (id != other.id) return false
+
+        return true
     }
 
     override fun hashCode(): Int {
         var result = super.hashCode()
         result = 31 * result + (`object`?.hashCode() ?: 0)
+        result = 31 * result + to.hashCode()
+        result = 31 * result + cc.hashCode()
+        result = 31 * result + name.hashCode()
+        result = 31 * result + actor.hashCode()
+        result = 31 * result + id.hashCode()
         return result
     }
 
-    override fun toString(): String = "Create(`object`=$`object`) ${super.toString()}"
+    override fun toString(): String =
+        "Create(`object`=$`object`, to=$to, cc=$cc, name='$name', actor='$actor', id='$id') ${super.toString()}"
 }

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Delete.kt

@@ -4,33 +4,42 @@ import com.fasterxml.jackson.databind.annotation.JsonDeserialize
 import dev.usbharu.hideout.activitypub.domain.model.objects.Object
 import dev.usbharu.hideout.activitypub.domain.model.objects.ObjectDeserializer
 
-open class Delete : Object {
+open class Delete : Object, HasId, HasActor, HasName {
     @JsonDeserialize(using = ObjectDeserializer::class)
     @Suppress("VariableNaming")
     var `object`: Object? = null
     var published: String? = null
+    override val actor: String
+    override val id: String
+    override val name: String
 
     constructor(
         type: List<String> = emptyList(),
-        name: String? = "Delete",
+        name: String = "Delete",
         actor: String,
         id: String,
         `object`: Object,
         published: String?
-    ) : super(add(type, "Delete"), name, actor, id) {
+    ) : super(add(type, "Delete")) {
         this.`object` = `object`
         this.published = published
+        this.name = name
+        this.actor = actor
+        this.id = id
     }
 
-    protected constructor() : super()
-
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
-        if (other !is Delete) return false
+        if (javaClass != other?.javaClass) return false
         if (!super.equals(other)) return false
 
+        other as Delete
+
         if (`object` != other.`object`) return false
         if (published != other.published) return false
+        if (actor != other.actor) return false
+        if (id != other.id) return false
+        if (name != other.name) return false
 
         return true
     }
@@ -39,8 +48,12 @@ open class Delete : Object {
         var result = super.hashCode()
         result = 31 * result + (`object`?.hashCode() ?: 0)
         result = 31 * result + (published?.hashCode() ?: 0)
+        result = 31 * result + actor.hashCode()
+        result = 31 * result + id.hashCode()
+        result = 31 * result + name.hashCode()
         return result
     }
 
-    override fun toString(): String = "Delete(`object`=$`object`, published=$published) ${super.toString()}"
+    override fun toString(): String =
+        "Delete(`object`=$`object`, published=$published, actor='$actor', id='$id', name='$name') ${super.toString()}"
 }

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Document.kt

@@ -2,34 +2,35 @@ package dev.usbharu.hideout.activitypub.domain.model
 
 import dev.usbharu.hideout.activitypub.domain.model.objects.Object
 
-open class Document : Object {
+open class Document : Object, HasName {
 
     var mediaType: String? = null
     var url: String? = null
+    override val name: String
 
-    protected constructor() : super()
     constructor(
         type: List<String> = emptyList(),
-        name: String? = null,
+        name: String,
         mediaType: String,
         url: String
     ) : super(
-        type = add(type, "Document"),
+        type = add(type, "Document")
-        name = name,
-        actor = null,
-        id = null
     ) {
         this.mediaType = mediaType
         this.url = url
+        this.name = name
     }
 
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
-        if (other !is Document) return false
+        if (javaClass != other?.javaClass) return false
         if (!super.equals(other)) return false
 
+        other as Document
+
         if (mediaType != other.mediaType) return false
         if (url != other.url) return false
+        if (name != other.name) return false
 
         return true
     }
@@ -38,8 +39,9 @@ open class Document : Object {
         var result = super.hashCode()
         result = 31 * result + (mediaType?.hashCode() ?: 0)
         result = 31 * result + (url?.hashCode() ?: 0)
+        result = 31 * result + name.hashCode()
         return result
     }
 
-    override fun toString(): String = "Document(mediaType=$mediaType, url=$url) ${super.toString()}"
+    override fun toString(): String = "Document(mediaType=$mediaType, url=$url, name='$name') ${super.toString()}"
 }

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Emoji.kt

@@ -15,10 +15,7 @@ open class Emoji : Object {
         updated: String?,
         icon: Image?
     ) : super(
-        type = add(type, "Emoji"),
+        type = add(type, "Emoji")
-        name = name,
-        actor = actor,
-        id = id
     ) {
         this.updated = updated
         this.icon = icon

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Follow.kt

@@ -2,37 +2,42 @@ package dev.usbharu.hideout.activitypub.domain.model
 
 import dev.usbharu.hideout.activitypub.domain.model.objects.Object
 
-open class Follow : Object {
+open class Follow : Object, HasActor {
     @Suppress("VariableNaming")
     var `object`: String? = null
 
-    protected constructor() : super()
+    override val actor: String
+
     constructor(
         type: List<String> = emptyList(),
-        name: String?,
         `object`: String?,
-        actor: String?
+        actor: String
     ) : super(
-        type = add(type, "Follow"),
+        type = add(type, "Follow")
-        name = name,
-        actor = actor
     ) {
         this.`object` = `object`
+        this.actor = actor
     }
 
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
-        if (other !is Follow) return false
+        if (javaClass != other?.javaClass) return false
         if (!super.equals(other)) return false
 
-        return `object` == other.`object`
+        other as Follow
+
+        if (`object` != other.`object`) return false
+        if (actor != other.actor) return false
+
+        return true
     }
 
     override fun hashCode(): Int {
         var result = super.hashCode()
         result = 31 * result + (`object`?.hashCode() ?: 0)
+        result = 31 * result + actor.hashCode()
         return result
     }
 
-    override fun toString(): String = "Follow(`object`=$`object`) ${super.toString()}"
+    override fun toString(): String = "Follow(`object`=$`object`, actor='$actor') ${super.toString()}"
 }

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/HasActor.kt

@@ -0,0 +1,5 @@
+package dev.usbharu.hideout.activitypub.domain.model
+
+interface HasActor {
+    val actor: String
+}

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/HasId.kt

@@ -0,0 +1,5 @@
+package dev.usbharu.hideout.activitypub.domain.model
+
+interface HasId {
+    val id: String
+}

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/HasName.kt

@@ -0,0 +1,5 @@
+package dev.usbharu.hideout.activitypub.domain.model
+
+interface HasName {
+    val name: String
+}

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Image.kt

@@ -7,9 +7,8 @@ open class Image : Object {
     private var url: String? = null
 
     protected constructor() : super()
-    constructor(type: List<String> = emptyList(), name: String, mediaType: String?, url: String?) : super(
+    constructor(type: List<String> = emptyList(), mediaType: String?, url: String?) : super(
-        add(type, "Image"),
+        add(type, "Image")
-        name
     ) {
         this.mediaType = mediaType
         this.url = url
@@ -17,11 +16,15 @@ open class Image : Object {
 
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
-        if (other !is Image) return false
+        if (javaClass != other?.javaClass) return false
         if (!super.equals(other)) return false
 
+        other as Image
+
         if (mediaType != other.mediaType) return false
-        return url == other.url
+        if (url != other.url) return false
+
+        return true
     }
 
     override fun hashCode(): Int {
@@ -30,4 +33,6 @@ open class Image : Object {
         result = 31 * result + (url?.hashCode() ?: 0)
         return result
     }
+
+    override fun toString(): String = "Image(mediaType=$mediaType, url=$url) ${super.toString()}"
 }

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Key.kt

@@ -2,41 +2,45 @@ package dev.usbharu.hideout.activitypub.domain.model
 
 import dev.usbharu.hideout.activitypub.domain.model.objects.Object
 
-open class Key : Object {
+open class Key : Object, HasId {
     var owner: String? = null
     var publicKeyPem: String? = null
+    override val id: String
 
-    protected constructor() : super()
     constructor(
         type: List<String>,
-        name: String,
         id: String,
         owner: String?,
         publicKeyPem: String?
     ) : super(
-        type = add(list = type, type = "Key"),
+        type = add(list = type, type = "Key")
-        name = name,
-        id = id
     ) {
         this.owner = owner
         this.publicKeyPem = publicKeyPem
+        this.id = id
     }
 
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
-        if (other !is Key) return false
+        if (javaClass != other?.javaClass) return false
         if (!super.equals(other)) return false
 
+        other as Key
+
         if (owner != other.owner) return false
-        return publicKeyPem == other.publicKeyPem
+        if (publicKeyPem != other.publicKeyPem) return false
+        if (id != other.id) return false
+
+        return true
     }
 
     override fun hashCode(): Int {
         var result = super.hashCode()
         result = 31 * result + (owner?.hashCode() ?: 0)
         result = 31 * result + (publicKeyPem?.hashCode() ?: 0)
+        result = 31 * result + id.hashCode()
         return result
     }
 
-    override fun toString(): String = "Key(owner=$owner, publicKeyPem=$publicKeyPem) ${super.toString()}"
+    override fun toString(): String = "Key(owner=$owner, publicKeyPem=$publicKeyPem, id='$id') ${super.toString()}"
 }

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Like.kt

@@ -4,42 +4,47 @@ import com.fasterxml.jackson.databind.annotation.JsonDeserialize
 import dev.usbharu.hideout.activitypub.domain.model.objects.Object
 import dev.usbharu.hideout.activitypub.domain.model.objects.ObjectDeserializer
 
-open class Like : Object {
+open class Like : Object, HasId, HasActor {
     @Suppress("VariableNaming")
     var `object`: String? = null
     var content: String? = null
 
     @JsonDeserialize(contentUsing = ObjectDeserializer::class)
     var tag: List<Object> = emptyList()
+    override val actor: String
+    override val id: String
 
-    protected constructor() : super()
     constructor(
         type: List<String> = emptyList(),
-        name: String?,
+        actor: String,
-        actor: String?,
+        id: String,
-        id: String?,
         `object`: String?,
         content: String?,
         tag: List<Object> = emptyList()
     ) : super(
-        type = add(type, "Like"),
+        type = add(type, "Like")
-        name = name,
-        actor = actor,
-        id = id
     ) {
         this.`object` = `object`
         this.content = content
         this.tag = tag
+        this.actor = actor
+        this.id = id
     }
 
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
-        if (other !is Like) return false
+        if (javaClass != other?.javaClass) return false
         if (!super.equals(other)) return false
 
+        other as Like
+
         if (`object` != other.`object`) return false
         if (content != other.content) return false
-        return tag == other.tag
+        if (tag != other.tag) return false
+        if (actor != other.actor) return false
+        if (id != other.id) return false
+
+        return true
     }
 
     override fun hashCode(): Int {
@@ -47,8 +52,12 @@ open class Like : Object {
         result = 31 * result + (`object`?.hashCode() ?: 0)
         result = 31 * result + (content?.hashCode() ?: 0)
         result = 31 * result + tag.hashCode()
+        result = 31 * result + actor.hashCode()
+        result = 31 * result + id.hashCode()
         return result
     }
 
-    override fun toString(): String = "Like(`object`=$`object`, content=$content, tag=$tag) ${super.toString()}"
+    override fun toString(): String {
+        return "Like(`object`=$`object`, content=$content, tag=$tag, actor='$actor', id='$id') ${super.toString()}"
+    }
 }

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Note.kt

@@ -2,79 +2,58 @@ package dev.usbharu.hideout.activitypub.domain.model
 
 import dev.usbharu.hideout.activitypub.domain.model.objects.Object
 
-open class Note : Object {
+open class Note
-    lateinit var attributedTo: String
+@Suppress("LongParameterList")
-    var attachment: List<Document> = emptyList()
+constructor(
-    lateinit var content: String
-    lateinit var published: String
-    var to: List<String> = emptyList()
-    var cc: List<String> = emptyList()
-    var sensitive: Boolean = false
-    var inReplyTo: String? = null
-
-    protected constructor() : super()
-
-    @Suppress("LongParameterList")
-    constructor(
     type: List<String> = emptyList(),
-        name: String,
+    override val id: String,
-        id: String?,
+    var attributedTo: String,
-        attributedTo: String,
+    var content: String,
-        content: String,
+    var published: String,
-        published: String,
+    var to: List<String> = emptyList(),
-        to: List<String> = emptyList(),
+    var cc: List<String> = emptyList(),
-        cc: List<String> = emptyList(),
+    var sensitive: Boolean = false,
-        sensitive: Boolean = false,
+    var inReplyTo: String? = null,
-        inReplyTo: String? = null,
+    var attachment: List<Document> = emptyList()
-        attachment: List<Document> = emptyList()
+) : Object(
-    ) : super(
+    type = add(type, "Note")
-        type = add(type, "Note"),
+),
-        name = name,
+    HasId {
-        id = id
-    ) {
-        this.attributedTo = attributedTo
-        this.content = content
-        this.published = published
-        this.to = to
-        this.cc = cc
-        this.sensitive = sensitive
-        this.inReplyTo = inReplyTo
-        this.attachment = attachment
-    }
 
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
-        if (other !is Note) return false
+        if (javaClass != other?.javaClass) return false
         if (!super.equals(other)) return false
 
+        other as Note
+
+        if (id != other.id) return false
         if (attributedTo != other.attributedTo) return false
-        if (attachment != other.attachment) return false
         if (content != other.content) return false
         if (published != other.published) return false
         if (to != other.to) return false
         if (cc != other.cc) return false
         if (sensitive != other.sensitive) return false
         if (inReplyTo != other.inReplyTo) return false
+        if (attachment != other.attachment) return false
 
         return true
     }
 
     override fun hashCode(): Int {
         var result = super.hashCode()
-        result = 31 * result + (attributedTo?.hashCode() ?: 0)
+        result = 31 * result + id.hashCode()
-        result = 31 * result + attachment.hashCode()
+        result = 31 * result + attributedTo.hashCode()
-        result = 31 * result + (content?.hashCode() ?: 0)
+        result = 31 * result + content.hashCode()
-        result = 31 * result + (published?.hashCode() ?: 0)
+        result = 31 * result + published.hashCode()
         result = 31 * result + to.hashCode()
         result = 31 * result + cc.hashCode()
         result = 31 * result + sensitive.hashCode()
         result = 31 * result + (inReplyTo?.hashCode() ?: 0)
+        result = 31 * result + attachment.hashCode()
         return result
     }
 
-    override fun toString(): String {
+    override fun toString(): String =
-        return "Note(attributedTo=$attributedTo, attachment=$attachment, " +
+        "Note(id='$id', attributedTo='$attributedTo', content='$content', published='$published', to=$to, cc=$cc, sensitive=$sensitive, inReplyTo=$inReplyTo, attachment=$attachment) ${super.toString()}"
-            "content=$content, published=$published, to=$to, cc=$cc, sensitive=$sensitive," +
-            " inReplyTo=$inReplyTo) ${super.toString()}"
-    }
 }

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Person.kt

@@ -2,47 +2,23 @@ package dev.usbharu.hideout.activitypub.domain.model
 
 import dev.usbharu.hideout.activitypub.domain.model.objects.Object
 
-open class Person : Object {
+open class Person
-    var preferredUsername: String? = null
+@Suppress("LongParameterList")
-    var summary: String? = null
+constructor(
-    var inbox: String? = null
-    var outbox: String? = null
-    var url: String? = null
-    private var icon: Image? = null
-    var publicKey: Key? = null
-    var endpoints: Map<String, String> = emptyMap()
-    var following: String? = null
-    var followers: String? = null
-
-    protected constructor() : super()
-
-    @Suppress("LongParameterList")
-    constructor(
     type: List<String> = emptyList(),
-        name: String,
+    override val name: String,
-        id: String?,
+    override val id: String,
-        preferredUsername: String?,
+    var preferredUsername: String?,
-        summary: String?,
+    var summary: String?,
-        inbox: String?,
+    var inbox: String?,
-        outbox: String?,
+    var outbox: String?,
-        url: String?,
+    var url: String?,
-        icon: Image?,
+    private var icon: Image?,
-        publicKey: Key?,
+    var publicKey: Key?,
-        endpoints: Map<String, String> = emptyMap(),
+    var endpoints: Map<String, String> = emptyMap(),
-        followers: String?,
+    var followers: String?,
-        following: String?
+    var following: String?
-    ) : super(add(type, "Person"), name, id = id) {
+) : Object(add(type, "Person")), HasId, HasName {
-        this.preferredUsername = preferredUsername
-        this.summary = summary
-        this.inbox = inbox
-        this.outbox = outbox
-        this.url = url
-        this.icon = icon
-        this.publicKey = publicKey
-        this.endpoints = endpoints
-        this.followers = followers
-        this.following = following
-    }
 
     override fun equals(other: Any?): Boolean {
         if (this === other) return true

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Tombstone.kt

@@ -2,11 +2,24 @@ package dev.usbharu.hideout.activitypub.domain.model
 
 import dev.usbharu.hideout.activitypub.domain.model.objects.Object
 
-open class Tombstone : Object {
+open class Tombstone(type: List<String> = emptyList(), override val id: String) :
-    constructor(
+    Object(add(type, "Tombstone")),
-        type: List<String> = emptyList(),
+    HasId {
-        name: String = "Tombstone",
+    override fun equals(other: Any?): Boolean {
-        actor: String? = null,
+        if (this === other) return true
-        id: String
+        if (javaClass != other?.javaClass) return false
-    ) : super(add(type, "Tombstone"), name, actor, id)
+        if (!super.equals(other)) return false
+
+        other as Tombstone
+
+        return id == other.id
+    }
+
+    override fun hashCode(): Int {
+        var result = super.hashCode()
+        result = 31 * result + id.hashCode()
+        return result
+    }
+
+    override fun toString(): String = "Tombstone(id='$id') ${super.toString()}"
 }

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/Undo.kt

@@ -5,41 +5,53 @@ import dev.usbharu.hideout.activitypub.domain.model.objects.Object
 import dev.usbharu.hideout.activitypub.domain.model.objects.ObjectDeserializer
 import java.time.Instant
 
-open class Undo : Object {
+open class Undo : Object, HasId, HasActor {
 
     @JsonDeserialize(using = ObjectDeserializer::class)
     @Suppress("VariableNaming")
     var `object`: Object? = null
     var published: String? = null
+    override val actor: String
+    override val id: String
 
-    protected constructor() : super()
     constructor(
         type: List<String> = emptyList(),
-        name: String,
         actor: String,
-        id: String?,
+        id: String,
         `object`: Object,
         published: Instant
-    ) : super(add(type, "Undo"), name, actor, id) {
+    ) : super(add(type, "Undo")) {
         this.`object` = `object`
         this.published = published.toString()
+        this.id = id
+        this.actor = actor
     }
 
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
-        if (other !is Undo) return false
+        if (javaClass != other?.javaClass) return false
         if (!super.equals(other)) return false
 
+        other as Undo
+
         if (`object` != other.`object`) return false
-        return published == other.published
+        if (published != other.published) return false
+        if (actor != other.actor) return false
+        if (id != other.id) return false
+
+        return true
     }
 
     override fun hashCode(): Int {
         var result = super.hashCode()
         result = 31 * result + (`object`?.hashCode() ?: 0)
         result = 31 * result + (published?.hashCode() ?: 0)
+        result = 31 * result + actor.hashCode()
+        result = 31 * result + id.hashCode()
         return result
     }
 
-    override fun toString(): String = "Undo(`object`=$`object`, published=$published) ${super.toString()}"
+    override fun toString(): String {
+        return "Undo(`object`=$`object`, published=$published, actor='$actor', id='$id') ${super.toString()}"
+    }
 }

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/objects/Object.kt

@@ -12,41 +12,29 @@ open class Object : JsonLd {
         set(value) {
             field = value.filter { it.isNotBlank() }
         }
-    var name: String? = null
-    var actor: String? = null
-    var id: String? = null
 
     protected constructor()
-    constructor(type: List<String>, name: String? = null, actor: String? = null, id: String? = null) : super() {
+    constructor(type: List<String>) : super() {
         this.type = type.filter { it.isNotBlank() }
-        this.name = name
-        this.actor = actor
-        this.id = id
     }
 
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
-        if (other !is Object) return false
+        if (javaClass != other?.javaClass) return false
         if (!super.equals(other)) return false
 
-        if (type != other.type) return false
+        other as Object
-        if (name != other.name) return false
-        if (actor != other.actor) return false
-        if (id != other.id) return false
 
-        return true
+        return type == other.type
     }
 
     override fun hashCode(): Int {
         var result = super.hashCode()
         result = 31 * result + type.hashCode()
-        result = 31 * result + (name?.hashCode() ?: 0)
-        result = 31 * result + (actor?.hashCode() ?: 0)
-        result = 31 * result + (id?.hashCode() ?: 0)
         return result
     }
 
-    override fun toString(): String = "Object(type=$type, name=$name, actor=$actor, id=$id) ${super.toString()}"
+    override fun toString(): String = "Object(type=$type) ${super.toString()}"
 
     companion object {
         @JvmStatic

src/main/kotlin/dev/usbharu/hideout/activitypub/domain/model/objects/ObjectValue.kt

@@ -1,16 +1,15 @@
 package dev.usbharu.hideout.activitypub.domain.model.objects
 
+import com.fasterxml.jackson.annotation.JsonCreator
+
 @Suppress("VariableNaming")
 open class ObjectValue : Object {
 
-    var `object`: String? = null
+    lateinit var `object`: String
 
-    protected constructor() : super()
+    @JsonCreator
-    constructor(type: List<String>, name: String?, actor: String?, id: String?, `object`: String?) : super(
+    constructor(type: List<String>) : super(
-        type,
+        type
-        name,
-        actor,
-        id
     ) {
         this.`object` = `object`
     }