Example why Kotlin is not the holy grail and why Lombok is not bad

src/main/java/hattrickdata/HattrickDataInfoKotlin.kt

@@ -0,0 +1,121 @@
+package hattrickdata
+
+import core.util.HODateTime
+
+open class HattrickDataInfoKotlin {
+    var fileName: String? = null
+        private set
+    var version: String? = null
+        private set
+    var userId: Int = 0
+        private set
+    var fetchedDate: HODateTime? = null
+        private set
+
+    constructor(fileName: String?, version: String?, userId: Int, fetchedDate: HODateTime?) {
+        this.fileName = fileName
+        this.version = version
+        this.userId = userId
+        this.fetchedDate = fetchedDate
+    }
+
+    constructor()
+
+    protected constructor(b: HattrickDataInfoKotlinBuilder<*, *>) {
+        this.fileName = b.fileName
+        this.version = b.version
+        this.userId = b.userId
+        this.fetchedDate = b.fetchedDate
+    }
+
+    override fun equals(o: Any?): Boolean {
+        if (o === this) return true
+        if (o !is HattrickDataInfoKotlin) return false
+        val other = o
+        if (!other.canEqual(this as Any)) return false
+        val `this$fileName`: Any? = this.fileName
+        val `other$fileName`: Any? = other.fileName
+        if (if (`this$fileName` == null) `other$fileName` != null else (`this$fileName` != `other$fileName`)) return false
+        val `this$version`: Any? = this.version
+        val `other$version`: Any? = other.version
+        if (if (`this$version` == null) `other$version` != null else (`this$version` != `other$version`)) return false
+        if (this.userId != other.userId) return false
+        val `this$fetchedDate`: Any? = this.fetchedDate
+        val `other$fetchedDate`: Any? = other.fetchedDate
+        if (if (`this$fetchedDate` == null) `other$fetchedDate` != null else (`this$fetchedDate` != `other$fetchedDate`)) return false
+        return true
+    }
+
+    protected fun canEqual(other: Any?): Boolean {
+        return other is HattrickDataInfoKotlin
+    }
+
+    override fun hashCode(): Int {
+        val PRIME = 59
+        var result = 1
+        val `$fileName`: Any? = this.fileName
+        result = result * PRIME + (`$fileName`?.hashCode() ?: 43)
+        val `$version`: Any? = this.version
+        result = result * PRIME + (`$version`?.hashCode() ?: 43)
+        result = result * PRIME + this.userId
+        val `$fetchedDate`: Any? = this.fetchedDate
+        result = result * PRIME + (`$fetchedDate`?.hashCode() ?: 43)
+        return result
+    }
+
+    override fun toString(): String {
+        return "HattrickDataInfoKotlin(fileName=" + this.fileName + ", version=" + this.version + ", userId=" + this.userId + ", fetchedDate=" + this.fetchedDate + ")"
+    }
+
+    abstract class HattrickDataInfoKotlinBuilder<C : HattrickDataInfoKotlin?, B : HattrickDataInfoKotlinBuilder<C, B>?> {
+        internal var fileName: String? = null
+        var version: String? = null
+        var userId: Int = 0
+        var fetchedDate: HODateTime? = null
+
+        fun fileName(fileName: String?): B {
+            this.fileName = fileName
+            return self()
+        }
+
+        fun version(version: String?): B {
+            this.version = version
+            return self()
+        }
+
+        fun userId(userId: Int): B {
+            this.userId = userId
+            return self()
+        }
+
+        fun fetchedDate(fetchedDate: HODateTime?): B {
+            this.fetchedDate = fetchedDate
+            return self()
+        }
+
+        protected abstract fun self(): B
+
+        abstract fun build(): C
+
+        override fun toString(): String {
+            return "HattrickDataInfoKotlin.HattrickDataInfoKotlinBuilder(fileName=" + this.fileName + ", version=" + this.version + ", userId=" + this.userId + ", fetchedDate=" + this.fetchedDate + ")"
+        }
+    }
+
+    private class HattrickDataInfoKotlinBuilderImpl :
+        HattrickDataInfoKotlinBuilder<HattrickDataInfoKotlin?, HattrickDataInfoKotlinBuilderImpl?>() {
+        override fun self(): HattrickDataInfoKotlinBuilderImpl {
+            return this
+        }
+
+        override fun build(): HattrickDataInfoKotlin {
+            return HattrickDataInfoKotlin(this)
+        }
+    }
+
+    companion object {
+        fun builder(): HattrickDataInfoKotlinBuilder<*, *> {
+            return HattrickDataInfoKotlinBuilderImpl()
+        }
+    }
+}

src/main/java/hattrickdata/HattrickDataInfoKotlin2.kt

@@ -0,0 +1,121 @@
+package hattrickdata
+
+import core.util.HODateTime
+
+open class HattrickDataInfoKotlin2 {
+    var fileName: String? = null
+        private set
+    var version: String? = null
+        private set
+    var userId: Int = 0
+        private set
+    var fetchedDate: HODateTime? = null
+        private set
+
+    constructor(fileName: String?, version: String?, userId: Int, fetchedDate: HODateTime?) {
+        this.fileName = fileName
+        this.version = version
+        this.userId = userId
+        this.fetchedDate = fetchedDate
+    }
+
+    constructor()
+
+    protected constructor(b: HattrickDataInfoKotlinBuilder<*, *>) {
+        this.fileName = b.fileName
+        this.version = b.version
+        this.userId = b.userId
+        this.fetchedDate = b.fetchedDate
+    }
+
+//    override fun equals(o: Any?): Boolean {
+//        if (o === this) return true
+//        if (o !is HattrickDataInfoKotlin2) return false
+//        val other = o
+//        if (!other.canEqual(this as Any)) return false
+//        val `this$fileName`: Any? = this.fileName
+//        val `other$fileName`: Any? = other.fileName
+//        if (if (`this$fileName` == null) `other$fileName` != null else (`this$fileName` != `other$fileName`)) return false
+//        val `this$version`: Any? = this.version
+//        val `other$version`: Any? = other.version
+//        if (if (`this$version` == null) `other$version` != null else (`this$version` != `other$version`)) return false
+//        if (this.userId != other.userId) return false
+//        val `this$fetchedDate`: Any? = this.fetchedDate
+//        val `other$fetchedDate`: Any? = other.fetchedDate
+//        if (if (`this$fetchedDate` == null) `other$fetchedDate` != null else (`this$fetchedDate` != `other$fetchedDate`)) return false
+//        return true
+//    }
+//
+//    protected fun canEqual(other: Any?): Boolean {
+//        return other is HattrickDataInfoKotlin2
+//    }
+//
+//    override fun hashCode(): Int {
+//        val PRIME = 59
+//        var result = 1
+//        val `$fileName`: Any? = this.fileName
+//        result = result * PRIME + (`$fileName`?.hashCode() ?: 43)
+//        val `$version`: Any? = this.version
+//        result = result * PRIME + (`$version`?.hashCode() ?: 43)
+//        result = result * PRIME + this.userId
+//        val `$fetchedDate`: Any? = this.fetchedDate
+//        result = result * PRIME + (`$fetchedDate`?.hashCode() ?: 43)
+//        return result
+//    }
+
+    override fun toString(): String {
+        return "HattrickDataInfoKotlin2(fileName=" + this.fileName + ", version=" + this.version + ", userId=" + this.userId + ", fetchedDate=" + this.fetchedDate + ")"
+    }
+
+    abstract class HattrickDataInfoKotlinBuilder<C : HattrickDataInfoKotlin2?, B : HattrickDataInfoKotlinBuilder<C, B>?> {
+        internal var fileName: String? = null
+        var version: String? = null
+        var userId: Int = 0
+        var fetchedDate: HODateTime? = null
+
+        fun fileName(fileName: String?): B {
+            this.fileName = fileName
+            return self()
+        }
+
+        fun version(version: String?): B {
+            this.version = version
+            return self()
+        }
+
+        fun userId(userId: Int): B {
+            this.userId = userId
+            return self()
+        }
+
+        fun fetchedDate(fetchedDate: HODateTime?): B {
+            this.fetchedDate = fetchedDate
+            return self()
+        }
+
+        protected abstract fun self(): B
+
+        abstract fun build(): C
+
+        override fun toString(): String {
+            return "HattrickDataInfoKotlin2.HattrickDataInfoKotlinBuilder(fileName=" + this.fileName + ", version=" + this.version + ", userId=" + this.userId + ", fetchedDate=" + this.fetchedDate + ")"
+        }
+    }
+
+    private class HattrickDataInfoKotlinBuilderImpl :
+        HattrickDataInfoKotlinBuilder<HattrickDataInfoKotlin2?, HattrickDataInfoKotlinBuilderImpl?>() {
+        override fun self(): HattrickDataInfoKotlinBuilderImpl {
+            return this
+        }
+
+        override fun build(): HattrickDataInfoKotlin2 {
+            return HattrickDataInfoKotlin2(this)
+        }
+    }
+
+    companion object {
+        fun builder(): HattrickDataInfoKotlinBuilder<*, *> {
+            return HattrickDataInfoKotlinBuilderImpl()
+        }
+    }
+}

src/test/java/hattrickdata/HattrickDataInfoTest.java

@@ -0,0 +1,78 @@
+package hattrickdata;
+
+import core.util.HODateTime;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+class HattrickDataInfoTest {
+
+    private static final class ValueFactory {
+
+        public static String createFileName() {
+            return "ValueFactory.createFileName()";
+        }
+
+        public static String createVersion() {
+            return "1.2";
+        }
+
+        public static HODateTime createFetchedDate() {
+            return HODateTime.fromHT("2024-09-03 09:00:00");
+        }
+    }
+
+    @Test
+    void testEquals_HattrickDataInfo() {
+        final HattrickDataInfo hattrickDataInfo = HattrickDataInfo.builder()
+                .fileName(ValueFactory.createFileName())
+                .version(ValueFactory.createVersion())
+                .fetchedDate(ValueFactory.createFetchedDate())
+                .build();
+        final HattrickDataInfo hattrickDataInfoEqual = HattrickDataInfo.builder()
+                .fileName(ValueFactory.createFileName())
+                .version(ValueFactory.createVersion())
+                .fetchedDate(ValueFactory.createFetchedDate())
+                .build();
+
+        assertThat(hattrickDataInfo).isEqualTo(hattrickDataInfo);
+        assertThat(hattrickDataInfoEqual).isEqualTo(hattrickDataInfoEqual);
+        assertThat(hattrickDataInfo).isEqualTo(hattrickDataInfoEqual);
+    }
+
+    @Test
+    void testEquals_HattrickDataInfoKotlin() {
+        final HattrickDataInfoKotlin hattrickDataInfo = HattrickDataInfoKotlin.Companion.builder()
+                .fileName(ValueFactory.createFileName())
+                .version(ValueFactory.createVersion())
+                .fetchedDate(ValueFactory.createFetchedDate())
+                .build();
+        final HattrickDataInfoKotlin hattrickDataInfoEqual = HattrickDataInfoKotlin.Companion.builder()
+                .fileName(ValueFactory.createFileName())
+                .version(ValueFactory.createVersion())
+                .fetchedDate(ValueFactory.createFetchedDate())
+                .build();
+
+        assertThat(hattrickDataInfo).isEqualTo(hattrickDataInfo);
+        assertThat(hattrickDataInfoEqual).isEqualTo(hattrickDataInfoEqual);
+        assertThat(hattrickDataInfo).isEqualTo(hattrickDataInfoEqual);
+    }
+
+    @Test
+    void testEquals_HattrickDataInfoKotlin2() {
+        final HattrickDataInfoKotlin2 hattrickDataInfo = HattrickDataInfoKotlin2.Companion.builder()
+                .fileName(ValueFactory.createFileName())
+                .version(ValueFactory.createVersion())
+                .fetchedDate(ValueFactory.createFetchedDate())
+                .build();
+        final HattrickDataInfoKotlin2 hattrickDataInfoEqual = HattrickDataInfoKotlin2.Companion.builder()
+                .fileName(ValueFactory.createFileName())
+                .version(ValueFactory.createVersion())
+                .fetchedDate(ValueFactory.createFetchedDate())
+                .build();
+
+        assertThat(hattrickDataInfo).isEqualTo(hattrickDataInfo);
+        assertThat(hattrickDataInfoEqual).isEqualTo(hattrickDataInfoEqual);
+        assertThat(hattrickDataInfo).isEqualTo(hattrickDataInfoEqual);
+    }
+}