Implement addAll functions for JsonArrayBuilder (#2156)

Fixes #2127

Author: aSemy

formats/json-tests/commonTest/src/kotlinx/serialization/json/JsonBuildersTest.kt

@@ -43,4 +43,105 @@ class JsonBuildersTest {
         }
         assertEquals("""[true,[1,2,3,4,5,6,7,8,9,10],null,{"stringKey":"stringValue"}]""", json.toString())
     }
+
+    @Test
+    fun testBuildJsonArrayAddAll() {
+        assertEquals(
+            """[1,2,3,4,5,null]""",
+            buildJsonArray {
+                assertTrue { addAll(listOf(1, 2, 3, 4, 5, null)) }
+            }.toString()
+        )
+
+        assertEquals(
+            """["a","b","c",null]""",
+            buildJsonArray {
+                assertTrue { addAll(listOf("a", "b", "c", null)) }
+            }.toString()
+        )
+
+        assertEquals(
+            """[true,false,null]""",
+            buildJsonArray {
+                assertTrue { addAll(listOf(true, false, null)) }
+            }.toString()
+        )
+
+        assertEquals(
+            """[2,"b",true,null]""",
+            buildJsonArray {
+                assertTrue {
+                    addAll(
+                        listOf(
+                            JsonPrimitive(2),
+                            JsonPrimitive("b"),
+                            JsonPrimitive(true),
+                            JsonNull,
+                        )
+                    )
+                }
+            }.toString()
+        )
+
+        assertEquals(
+            """[{},{},{},null]""",
+            buildJsonArray {
+                assertTrue {
+                    addAll(
+                        listOf(
+                            JsonObject(emptyMap()),
+                            JsonObject(emptyMap()),
+                            JsonObject(emptyMap()),
+                            JsonNull
+                        )
+                    )
+                }
+            }.toString()
+        )
+
+        assertEquals(
+            """[[],[],[],null]""",
+            buildJsonArray {
+                assertTrue {
+                    addAll(
+                        listOf(
+                            JsonArray(emptyList()),
+                            JsonArray(emptyList()),
+                            JsonArray(emptyList()),
+                            JsonNull
+                        )
+                    )
+                }
+            }.toString()
+        )
+
+        assertEquals(
+            """[null,null]""",
+            buildJsonArray {
+                assertTrue {
+                    addAll(listOf(JsonNull, JsonNull))
+                }
+            }.toString()
+        )
+    }
+
+    @Test
+    fun testBuildJsonArrayAddAllNotModified() {
+        assertEquals(
+            """[]""",
+            buildJsonArray {
+                // add collections
+                assertFalse { addAll(listOf<Number>()) }
+                assertFalse { addAll(listOf<String>()) }
+                assertFalse { addAll(listOf<Boolean>()) }
+
+                // add json elements
+                assertFalse { addAll(listOf()) }
+                assertFalse { addAll(listOf<JsonNull>()) }
+                assertFalse { addAll(listOf<JsonObject>()) }
+                assertFalse { addAll(listOf<JsonArray>()) }
+                assertFalse { addAll(listOf<JsonPrimitive>()) }
+            }.toString()
+        )
+    }
 }

formats/json/api/kotlinx-serialization-json.api

@@ -70,6 +70,7 @@ public final class kotlinx/serialization/json/JsonArray$Companion {
 public final class kotlinx/serialization/json/JsonArrayBuilder {
 	public fun <init> ()V
 	public final fun add (Lkotlinx/serialization/json/JsonElement;)Z
+	public final fun addAll (Ljava/util/Collection;)Z
 	public final fun build ()Lkotlinx/serialization/json/JsonArray;
 }
 
@@ -173,6 +174,9 @@ public final class kotlinx/serialization/json/JsonElementBuildersKt {
 	public static final fun add (Lkotlinx/serialization/json/JsonArrayBuilder;Ljava/lang/Number;)Z
 	public static final fun add (Lkotlinx/serialization/json/JsonArrayBuilder;Ljava/lang/String;)Z
 	public static final fun add (Lkotlinx/serialization/json/JsonArrayBuilder;Ljava/lang/Void;)Z
+	public static final fun addAllBooleans (Lkotlinx/serialization/json/JsonArrayBuilder;Ljava/util/Collection;)Z
+	public static final fun addAllNumbers (Lkotlinx/serialization/json/JsonArrayBuilder;Ljava/util/Collection;)Z
+	public static final fun addAllStrings (Lkotlinx/serialization/json/JsonArrayBuilder;Ljava/util/Collection;)Z
 	public static final fun addJsonArray (Lkotlinx/serialization/json/JsonArrayBuilder;Lkotlin/jvm/functions/Function1;)Z
 	public static final fun addJsonObject (Lkotlinx/serialization/json/JsonArrayBuilder;Lkotlin/jvm/functions/Function1;)Z
 	public static final fun buildJsonArray (Lkotlin/jvm/functions/Function1;)Lkotlinx/serialization/json/JsonArray;

formats/json/commonMain/src/kotlinx/serialization/json/JsonElementBuilders.kt

@@ -7,6 +7,7 @@ package kotlinx.serialization.json
 
 import kotlinx.serialization.ExperimentalSerializationApi
 import kotlin.contracts.*
+import kotlin.jvm.JvmName
 
 /**
  * Builds [JsonObject] with the given [builderAction] builder.
@@ -136,6 +137,15 @@ public class JsonArrayBuilder @PublishedApi internal constructor() {
         return true
     }
 
+    /**
+     * Adds the given JSON [elements] to a resulting JSON array.
+     *
+     * @return `true` if the list was changed as the result of the operation.
+     */
+    @ExperimentalSerializationApi
+    public fun addAll(elements: Collection<JsonElement>): Boolean =
+        content.addAll(elements)
+
     @PublishedApi
     internal fun build(): JsonArray = JsonArray(content)
 }
@@ -186,6 +196,35 @@ public fun JsonArrayBuilder.addJsonObject(builderAction: JsonObjectBuilder.() ->
 public fun JsonArrayBuilder.addJsonArray(builderAction: JsonArrayBuilder.() -> Unit): Boolean =
     add(buildJsonArray(builderAction))
 
+/**
+ * Adds the given string [values] to a resulting JSON array.
+ *
+ * @return `true` if the list was changed as the result of the operation.
+ */
+@JvmName("addAllStrings")
+@ExperimentalSerializationApi
+public fun JsonArrayBuilder.addAll(values: Collection<String?>): Boolean =
+    addAll(values.map(::JsonPrimitive))
+
+/**
+ * Adds the given boolean [values] to a resulting JSON array.
+ *
+ * @return `true` if the list was changed as the result of the operation.
+ */
+@JvmName("addAllBooleans")
+@ExperimentalSerializationApi
+public fun JsonArrayBuilder.addAll(values: Collection<Boolean?>): Boolean =
+    addAll(values.map(::JsonPrimitive))
+
+/**
+ * Adds the given numeric [values] to a resulting JSON array.
+ *
+ * @return `true` if the list was changed as the result of the operation.
+ */
+@JvmName("addAllNumbers")
+@ExperimentalSerializationApi
+public fun JsonArrayBuilder.addAll(values: Collection<Number?>): Boolean =
+    addAll(values.map(::JsonPrimitive))
 
 @DslMarker
 internal annotation class JsonDslMarker