Changed the logic of Value::isList for serialization

CHANGELOG.md

@@ -4,6 +4,8 @@
 ### Added
 
 ### Changed
+- `ListValue` and `DoubleArrayValue` implement `Iterable`.
+- Changed the logic of `Value::isList` to check for type instead of size
 
 ### Deprecated
 
@@ -12,6 +14,7 @@
 ### Fixed
 
 ### Security
+
 ## [0.2.0]
 ### Added
 

build.gradle.kts

@@ -2,7 +2,7 @@ plugins {
     id("ru.mipt.npm.project")
 }
 
-val dataforgeVersion by extra("0.2.0")
+val dataforgeVersion by extra("0.2.1-dev-1")
 
 val bintrayRepo by extra("dataforge")
 val githubProject by extra("dataforge-core")

dataforge-meta/api/dataforge-meta.api

@@ -813,7 +813,7 @@ public final class hep/dataforge/names/NameTokenKt {
 	public static final fun withIndex (Lhep/dataforge/names/NameToken;Ljava/lang/String;)Lhep/dataforge/names/NameToken;
 }
 
-public final class hep/dataforge/values/DoubleArrayValue : hep/dataforge/values/Value {
+public final class hep/dataforge/values/DoubleArrayValue : hep/dataforge/values/Value, java/lang/Iterable, kotlin/jvm/internal/markers/KMappedMarker {
 	public fun <init> ([D)V
 	public fun equals (Ljava/lang/Object;)Z
 	public fun getList ()Ljava/util/List;
@@ -824,6 +824,7 @@ public final class hep/dataforge/values/DoubleArrayValue : hep/dataforge/values/
 	public synthetic fun getValue ()Ljava/lang/Object;
 	public fun getValue ()[D
 	public fun hashCode ()I
+	public fun iterator ()Ljava/util/Iterator;
 	public fun toString ()Ljava/lang/String;
 }
 
@@ -869,7 +870,7 @@ public final class hep/dataforge/values/LazyParsedValue : hep/dataforge/values/V
 	public fun toString ()Ljava/lang/String;
 }
 
-public final class hep/dataforge/values/ListValue : hep/dataforge/values/Value {
+public final class hep/dataforge/values/ListValue : hep/dataforge/values/Value, java/lang/Iterable, kotlin/jvm/internal/markers/KMappedMarker {
 	public fun <init> (Ljava/util/List;)V
 	public fun equals (Ljava/lang/Object;)Z
 	public fun getList ()Ljava/util/List;
@@ -879,6 +880,7 @@ public final class hep/dataforge/values/ListValue : hep/dataforge/values/Value {
 	public synthetic fun getValue ()Ljava/lang/Object;
 	public fun getValue ()Ljava/util/List;
 	public fun hashCode ()I
+	public fun iterator ()Ljava/util/Iterator;
 	public fun toString ()Ljava/lang/String;
 }
 

dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/Value.kt

@@ -105,7 +105,7 @@ public object Null : Value {
  * Singleton true value
  */
 public object True : Value {
-    override val value: Any? get() = true
+    override val value: Any get() = true
     override val type: ValueType get() = ValueType.BOOLEAN
     override val number: Number get() = 1.0
     override val string: String get() = "true"
@@ -120,7 +120,7 @@ public object True : Value {
  * Singleton false value
  */
 public object False : Value {
-    override val value: Any? get() = false
+    override val value: Any get() = false
     override val type: ValueType get() = ValueType.BOOLEAN
     override val number: Number get() = -1.0
     override val string: String get() = "false"
@@ -132,7 +132,7 @@ public object False : Value {
 }
 
 public class NumberValue(override val number: Number) : Value {
-    override val value: Any? get() = number
+    override val value: Any get() = number
     override val type: ValueType get() = ValueType.NUMBER
     override val string: String get() = number.toString()
 
@@ -155,7 +155,7 @@ public class NumberValue(override val number: Number) : Value {
 }
 
 public class StringValue(override val string: String) : Value {
-    override val value: Any? get() = string
+    override val value: Any get() = string
     override val type: ValueType get() = ValueType.STRING
     override val number: Number get() = string.toDouble()
 
@@ -182,7 +182,7 @@ public class EnumValue<E : Enum<*>>(override val value: E) : Value {
     override fun toString(): String = value.toString()
 }
 
-public class ListValue(override val list: List<Value>) : Value {
+public class ListValue(override val list: List<Value>) : Value, Iterable<Value> {
     init {
         require(list.isNotEmpty()) { "Can't create list value from empty list" }
     }
@@ -194,6 +194,8 @@ public class ListValue(override val list: List<Value>) : Value {
 
     override fun toString(): String = list.joinToString(prefix = "[", postfix = "]")
 
+    override fun iterator(): Iterator<Value> = list.iterator()
+
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
         if (other !is Value) return false

dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/exoticValues.kt

@@ -23,7 +23,7 @@ public fun String.lazyParseValue(): LazyParsedValue = LazyParsedValue(this)
 /**
  * A performance optimized version of list value for doubles
  */
-public class DoubleArrayValue(override val value: DoubleArray) : Value {
+public class DoubleArrayValue(override val value: DoubleArray) : Value, Iterable<Double> {
     override val type: ValueType get() = ValueType.NUMBER
     override val number: Double get() = value.first()
     override val string: String get() = value.first().toString()
@@ -44,6 +44,8 @@ public class DoubleArrayValue(override val value: DoubleArray) : Value {
     }
 
     override fun toString(): String = list.joinToString(prefix = "[", postfix = "]")
+
+    override fun iterator(): Iterator<Double> = value.iterator()
 }
 
 public fun DoubleArray.asValue(): Value = if (isEmpty()) Null else DoubleArrayValue(this)

dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/valueExtensions.kt

@@ -9,9 +9,10 @@ import hep.dataforge.meta.MetaBuilder
 public fun Value.isNull(): Boolean = this == Null
 
 /**
- * Check if value is list
+ * Check if value is list. This method checks the type of the value, not the number of the elements.
+ * So it will return `true` for empty lists and lists of one elements.
  */
-public fun Value.isList(): Boolean = this.list.size > 1
+public fun Value.isList(): Boolean = this is Iterable<*>
 
 public val Value.boolean: Boolean
     get() = this == True