From 11722db3c827227b666e25636db012f5b65df2f1 Mon Sep 17 00:00:00 2001
From: Alexander Nozik <altavir@gmail.com>
Date: Fri, 8 Mar 2024 10:04:37 +0300
Subject: [PATCH] Add Attributes container equality

---
 .../kotlin/space/kscience/attributes/Attributes.kt | 14 ++++++++++----
 .../space/kscience/attributes/AttributesBuilder.kt |  4 ++++
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/attributes-kt/src/commonMain/kotlin/space/kscience/attributes/Attributes.kt b/attributes-kt/src/commonMain/kotlin/space/kscience/attributes/Attributes.kt
index 86d196f74..ff5d7f145 100644
--- a/attributes-kt/src/commonMain/kotlin/space/kscience/attributes/Attributes.kt
+++ b/attributes-kt/src/commonMain/kotlin/space/kscience/attributes/Attributes.kt
@@ -5,8 +5,6 @@
 
 package space.kscience.attributes
 
-import kotlin.jvm.JvmInline
-
 /**
  * A set of attributes. The implementation must guarantee that [content] keys correspond to its value types.
  */
@@ -27,14 +25,22 @@ public interface Attributes {
     @Suppress("UNCHECKED_CAST")
     public operator fun <T> get(attribute: Attribute<T>): T? = content[attribute] as? T
 
+    override fun toString(): String
+    override fun equals(other: Any?): Boolean
+    override fun hashCode(): Int
+
     public companion object {
         public val EMPTY: Attributes = AttributesImpl(emptyMap())
+
+        public fun equals(a1: Attributes, a2: Attributes): Boolean =
+            a1.keys == a2.keys && a1.keys.all { a1[it] == a2[it] }
     }
 }
 
-@JvmInline
-internal value class AttributesImpl(override val content: Map<out Attribute<*>, Any?>) : Attributes {
+internal class AttributesImpl(override val content: Map<out Attribute<*>, Any?>) : Attributes {
     override fun toString(): String = "Attributes(value=${content.entries})"
+    override fun equals(other: Any?): Boolean = other is Attributes && Attributes.equals(this, other)
+    override fun hashCode(): Int = content.hashCode()
 }
 
 public fun Attributes.isEmpty(): Boolean = content.isEmpty()
diff --git a/attributes-kt/src/commonMain/kotlin/space/kscience/attributes/AttributesBuilder.kt b/attributes-kt/src/commonMain/kotlin/space/kscience/attributes/AttributesBuilder.kt
index 0acf4e004..0082ba143 100644
--- a/attributes-kt/src/commonMain/kotlin/space/kscience/attributes/AttributesBuilder.kt
+++ b/attributes-kt/src/commonMain/kotlin/space/kscience/attributes/AttributesBuilder.kt
@@ -16,6 +16,10 @@ public class AttributesBuilder<out O> internal constructor(
 
     public constructor() : this(mutableMapOf())
 
+    override fun toString(): String = "Attributes(value=${content.entries})"
+    override fun equals(other: Any?): Boolean = other is Attributes && Attributes.equals(this, other)
+    override fun hashCode(): Int = content.hashCode()
+
     override val content: Map<out Attribute<*>, Any?> get() = map
 
     public operator fun <T> set(attribute: Attribute<T>, value: T?) {