1 files changed, 101 insertions, 0 deletions
diff --git a/runtime/commonMain/src/kotlinx/serialization/json/JsonElementBuilders.kt b/runtime/commonMain/src/kotlinx/serialization/json/JsonElementBuilders.kt
new file mode 100644
index 00000000..2f1f2598
--- /dev/null
+++ b/runtime/commonMain/src/kotlinx/serialization/json/JsonElementBuilders.kt
@@ -0,0 +1,101 @@
+/*
+ * Copyright 2017-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+@file:Suppress("RedundantVisibilityModifier")
+
+package kotlinx.serialization.json
+
+/**
+ * Builds [JsonObject] with given [init] builder.
+ */
+public fun json(init: JsonObjectBuilder.() -> Unit): JsonObject {
+    val builder = JsonObjectBuilder()
+    builder.init()
+    return JsonObject(builder.content)
+}
+
+/**
+ * Builds [JsonArray] with given [init] builder.
+ */
+public fun jsonArray(init: JsonArrayBuilder.() -> Unit): JsonArray {
+    val builder = JsonArrayBuilder()
+    builder.init()
+    return JsonArray(builder.content)
+}
+
+/**
+ * DSL builder for a [JsonArray].
+ */
+public class JsonArrayBuilder internal constructor() {
+
+    internal val content: MutableList<JsonElement> = mutableListOf()
+
+    /**
+     * Adds [this] value to the current [JsonArray] as [JsonPrimitive].
+     */
+    public operator fun String?.unaryPlus() {
+        content.add(JsonPrimitive(this))
+    }
+
+    /**
+     * Adds [this] value to the current [JsonArray] as [JsonPrimitive].
+     */
+    public operator fun Number?.unaryPlus() {
+        content.add(JsonPrimitive(this))
+    }
+
+    /**
+     * Adds [this] value to the current [JsonArray] as [JsonPrimitive].
+     */
+    public operator fun Boolean?.unaryPlus() {
+        content.add(JsonPrimitive(this))
+    }
+
+    /**
+     * Adds [this] value to the current [JsonArray].
+     */
+    public operator fun JsonElement.unaryPlus() {
+        this@JsonArrayBuilder.content.add(this)
+    }
+}
+
+/**
+ * DSL builder for a [JsonObject].
+ */
+public class JsonObjectBuilder internal constructor() {
+
+    internal val content: MutableMap<String, JsonElement> = linkedMapOf()
+
+    /**
+     * Adds given [value] to the current [JsonObject] with [this] as a key.
+     */
+    public infix fun String.to(value: JsonElement) {
+        require(content[this] == null) {"Key $this is already registered in builder"}
+        content[this] = value
+    }
+
+    /**
+     * Adds given [value] as [JsonPrimitive] to the current [JsonObject] with [this] as a key.
+     */
+    public infix fun String.to(value: Number?) {
+        require(content[this] == null) {"Key $this is already registered in builder"}
+        content[this] = JsonPrimitive(value)
+    }
+
+    /**
+     * Adds given [value] as [JsonPrimitive] to the current [JsonObject] with [this] as a key.
+     */
+    public infix fun String.to(value: Boolean?) {
+        require(content[this] == null) {"Key $this is already registered in builder"}
+        content[this] = JsonPrimitive(value)
+    }
+
+    /**
+     * Adds given [value] as [JsonPrimitive] to the current [JsonObject] with [this] as a key.
+     */
+    public infix fun String.to(value: String?) {
+        require(content[this] == null) {"Key $this is already registered in builder"}
+        content[this] = JsonPrimitive(value)
+    }
+}