Add methods to create schema from JsonElement and from IS (jvm)

Author: Oleg

api/json-schema-validator.api

@@ -39,11 +39,17 @@ public final class com/github/optimumcode/json/schema/ErrorCollector$Companion {
 public final class com/github/optimumcode/json/schema/JsonSchema {
 	public static final field Companion Lcom/github/optimumcode/json/schema/JsonSchema$Companion;
 	public static final fun fromDefinition (Ljava/lang/String;)Lcom/github/optimumcode/json/schema/JsonSchema;
+	public static final fun fromJsonElement (Lkotlinx/serialization/json/JsonElement;)Lcom/github/optimumcode/json/schema/JsonSchema;
 	public final fun validate (Lkotlinx/serialization/json/JsonElement;Lcom/github/optimumcode/json/schema/ErrorCollector;)Z
 }
 
 public final class com/github/optimumcode/json/schema/JsonSchema$Companion {
 	public final fun fromDefinition (Ljava/lang/String;)Lcom/github/optimumcode/json/schema/JsonSchema;
+	public final fun fromJsonElement (Lkotlinx/serialization/json/JsonElement;)Lcom/github/optimumcode/json/schema/JsonSchema;
+}
+
+public final class com/github/optimumcode/json/schema/JsonSchemaStream {
+	public static final fun fromStream (Lcom/github/optimumcode/json/schema/JsonSchema$Companion;Ljava/io/InputStream;)Lcom/github/optimumcode/json/schema/JsonSchema;
 }
 
 public final class com/github/optimumcode/json/schema/ValidationError {

src/commonMain/kotlin/com/github/optimumcode/json/schema/JsonSchema.kt

@@ -36,6 +36,14 @@ public class JsonSchema internal constructor(
     @JvmStatic
     public fun fromDefinition(schema: String): JsonSchema {
       val schemaElement: JsonElement = Json.parseToJsonElement(schema)
+      return fromJsonElement(schemaElement)
+    }
+
+    /**
+     * Loads JSON schema from the [schemaElement] JSON element
+     */
+    @JvmStatic
+    public fun fromJsonElement(schemaElement: JsonElement): JsonSchema {
       return SchemaLoader().load(schemaElement)
     }
   }

src/jvmMain/kotlin/com/github/optimumcode/json/schema/JsonSchemaStream.kt

@@ -0,0 +1,19 @@
+@file:JvmName("JsonSchemaStream")
+
+package com.github.optimumcode.json.schema
+
+import kotlinx.serialization.ExperimentalSerializationApi
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.JsonElement
+import kotlinx.serialization.json.decodeFromStream
+import java.io.InputStream
+
+/**
+ * Loads JSON schema from provided [input]
+ */
+@ExperimentalSerializationApi
+public fun JsonSchema.Companion.fromStream(input: InputStream): JsonSchema {
+  // we do not close the IS. It is caller responsibility
+  val schemaElement = Json.decodeFromStream(JsonElement.serializer(), input)
+  return fromJsonElement(schemaElement)
+}

src/jvmTest/kotlin/com/github/optimumcode/json/schema/JsonSchemaStreamTest.kt

@@ -0,0 +1,20 @@
+package com.github.optimumcode.json.schema
+
+import io.kotest.assertions.throwables.shouldNotThrowAny
+import io.kotest.core.spec.style.FunSpec
+import kotlinx.serialization.ExperimentalSerializationApi
+import java.net.URL
+
+@OptIn(ExperimentalSerializationApi::class)
+@Suppress("unused")
+class JsonSchemaStreamTest : FunSpec() {
+  init {
+    test("definition is loaded from input stream") {
+      shouldNotThrowAny {
+        URL("https://json-schema.org/draft-07/schema#").openStream().use { input ->
+          JsonSchema.fromStream(input)
+        }
+      }
+    }
+  }
+}