Use jackson for json serialization and parsing

1 files changed, 59 insertions, 0 deletions

diff --git a/core/src/main/kotlin/utilities/json.kt b/core/src/main/kotlin/utilities/json.kt
new file mode 100644
index 00000000..d2e70d75
--- /dev/null
+++ b/core/src/main/kotlin/utilities/json.kt
@@ -0,0 +1,59 @@
+package org.jetbrains.dokka.utilities
+
+import com.fasterxml.jackson.core.JsonGenerator
+import com.fasterxml.jackson.databind.*
+import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatVisitorWrapper
+import com.fasterxml.jackson.databind.module.SimpleModule
+import com.fasterxml.jackson.databind.ser.std.StdScalarSerializer
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.module.kotlin.jacksonTypeRef
+import java.io.File
+import java.lang.reflect.Type
+import com.fasterxml.jackson.core.type.TypeReference as JacksonTypeReference
+
+private val objectMapper = run {
+    val module = SimpleModule().apply {
+        addSerializer(FileSerializer)
+    }
+    jacksonObjectMapper()
+        .registerModule(module)
+        .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
+}
+
+@PublishedApi
+internal class TypeReference<T> private constructor(
+    internal val jackson: JacksonTypeReference<T>
+) {
+    companion object {
+        @OptIn(ExperimentalStdlibApi::class)
+        internal inline operator fun <reified T> invoke(): TypeReference<T> = TypeReference(jacksonTypeRef())
+    }
+}
+
+@PublishedApi
+internal fun toJsonString(value: Any): String = objectMapper.writeValueAsString(value)
+
+@PublishedApi
+internal inline fun <reified T : Any> parseJson(json: String): T {
+    return parseJson(json, TypeReference())
+}
+
+@PublishedApi
+internal fun <T : Any> parseJson(json: String, typeReference: TypeReference<T>): T {
+    return objectMapper.readValue(json, typeReference.jackson)
+}
+
+private object FileSerializer : StdScalarSerializer<File>(File::class.java) {
+    override fun serialize(value: File, g: JsonGenerator, provider: SerializerProvider) {
+        g.writeString(value.path)
+    }
+
+    override fun getSchema(provider: SerializerProvider, typeHint: Type): JsonNode {
+        return createSchemaNode("string", true)
+    }
+
+    @Throws(JsonMappingException::class)
+    override fun acceptJsonFormatVisitor(visitor: JsonFormatVisitorWrapper, typeHint: JavaType) {
+        visitStringFormat(visitor, typeHint)
+    }
+}