add duration to JSON auto-marshalling

http4k-core/src/test/kotlin/org/http4k/format/AutoMarshallingContract.kt

@@ -6,6 +6,7 @@ import com.natpryce.hamkrest.throws
 import org.http4k.core.Uri
 import org.junit.jupiter.api.Test
 import java.net.URL
+import java.time.Duration
 import java.time.Instant
 import java.time.LocalDate
 import java.time.LocalDateTime
@@ -14,7 +15,17 @@ import java.time.ZoneId
 import java.time.ZonedDateTime
 import java.util.UUID
 
-data class CommonJdkPrimitives(val localDate: LocalDate, val localTime: LocalTime, val localDateTime: LocalDateTime, val zonedDateTime: ZonedDateTime, val instant: Instant, val uuid: UUID, val uri: Uri, val url: URL)
+data class CommonJdkPrimitives(
+        val duration: Duration,
+        val localDate: LocalDate,
+        val localTime: LocalTime,
+        val localDateTime: LocalDateTime,
+        val zonedDateTime: ZonedDateTime,
+        val instant: Instant,
+        val uuid: UUID,
+        val uri: Uri,
+        val url: URL
+)
 
 data class ArbObject(val string: String, val child: ArbObject?, val numbers: List<Int>, val bool: Boolean)
 
@@ -23,7 +34,7 @@ data class RegexHolder(val regex: Regex)
 abstract class AutoMarshallingContract(private val j: AutoMarshallingJson) {
 
     protected open val expectedAutoMarshallingResult = """{"string":"hello","child":{"string":"world","child":null,"numbers":[1],"bool":true},"numbers":[],"bool":false}"""
-    protected open val expectedAutoMarshallingResultPrimitives = """{"localDate":"2000-01-01","localTime":"01:01:01","localDateTime":"2000-01-01T01:01:01","zonedDateTime":"2000-01-01T01:01:01Z[UTC]","instant":"1970-01-01T00:00:00Z","uuid":"1a448854-1687-4f90-9562-7d527d64383c","uri":"http://uri:8000","url":"http://url:9000"}"""
+    protected open val expectedAutoMarshallingResultPrimitives = """{"duration":"PT1S","localDate":"2000-01-01","localTime":"01:01:01","localDateTime":"2000-01-01T01:01:01","zonedDateTime":"2000-01-01T01:01:01Z[UTC]","instant":"1970-01-01T00:00:00Z","uuid":"1a448854-1687-4f90-9562-7d527d64383c","uri":"http://uri:8000","url":"http://url:9000"}"""
 
     val obj = ArbObject("hello", ArbObject("world", null, listOf(1), true), emptyList(), false)
 
@@ -43,7 +54,7 @@ abstract class AutoMarshallingContract(private val j: AutoMarshallingJson) {
     fun `roundtrip object with common java primitive types`() {
         val localDate = LocalDate.of(2000, 1, 1)
         val localTime = LocalTime.of(1, 1, 1)
-        val obj = CommonJdkPrimitives(localDate, localTime, LocalDateTime.of(localDate, localTime), ZonedDateTime.of(localDate, localTime, ZoneId.of("UTC")), Instant.EPOCH, UUID.fromString("1a448854-1687-4f90-9562-7d527d64383c"), Uri.of("http://uri:8000"), URL("http://url:9000"))
+        val obj = CommonJdkPrimitives(Duration.ofMillis(1000), localDate, localTime, LocalDateTime.of(localDate, localTime), ZonedDateTime.of(localDate, localTime, ZoneId.of("UTC")), Instant.EPOCH, UUID.fromString("1a448854-1687-4f90-9562-7d527d64383c"), Uri.of("http://uri:8000"), URL("http://url:9000"))
         val out = j.asJsonString(obj)
         assertThat(out, equalTo(expectedAutoMarshallingResultPrimitives))
         assertThat(j.asA(out, CommonJdkPrimitives::class), equalTo(obj))

http4k-format-gson/src/main/kotlin/org/http4k/format/Gson.kt

@@ -22,6 +22,7 @@ import java.lang.reflect.Type
 import java.math.BigDecimal
 import java.math.BigInteger
 import java.net.URL
+import java.time.Duration
 import java.time.Instant
 import java.time.LocalDate
 import java.time.LocalDateTime
@@ -101,6 +102,7 @@ open class ConfigurableGson(builder: GsonBuilder) : JsonLibAutoMarshallingJson<J
 }
 
 object Gson : ConfigurableGson(GsonBuilder()
+        .registerTypeAdapter(Duration::class.java, custom(Duration::parse))
         .registerTypeAdapter(LocalTime::class.java, custom({ LocalTime.parse(it, DateTimeFormatter.ISO_LOCAL_TIME) }, DateTimeFormatter.ISO_LOCAL_TIME::format))
         .registerTypeAdapter(LocalDate::class.java, custom({ LocalDate.parse(it, DateTimeFormatter.ISO_DATE) }, DateTimeFormatter.ISO_DATE::format))
         .registerTypeAdapter(LocalDateTime::class.java, custom({ LocalDateTime.parse(it, DateTimeFormatter.ISO_LOCAL_DATE_TIME) }, DateTimeFormatter.ISO_LOCAL_DATE_TIME::format))

http4k-format-jackson/src/main/kotlin/org/http4k/format/Jackson.kt

@@ -30,6 +30,7 @@ import org.http4k.websocket.WsMessage
 import java.math.BigDecimal
 import java.math.BigInteger
 import java.net.URL
+import java.time.Duration
 import java.time.Instant
 import java.time.LocalDate
 import java.time.LocalDateTime
@@ -97,6 +98,7 @@ open class ConfigurableJackson(private val mapper: ObjectMapper) : JsonLibAutoMa
 }
 
 val defaultKotlinModuleWithHttp4kSerialisers = KotlinModule()
+        .custom(Duration::parse)
         .custom({ LocalTime.parse(it, DateTimeFormatter.ISO_LOCAL_TIME) }, DateTimeFormatter.ISO_LOCAL_TIME::format)
         .custom({ LocalDate.parse(it, DateTimeFormatter.ISO_DATE) }, DateTimeFormatter.ISO_DATE::format)
         .custom({ LocalDateTime.parse(it, DateTimeFormatter.ISO_LOCAL_DATE_TIME) }, DateTimeFormatter.ISO_LOCAL_DATE_TIME::format)

http4k-format-moshi/src/main/kotlin/org/http4k/format/Moshi.kt

@@ -15,6 +15,7 @@ import org.http4k.lens.ContentNegotiation.Companion.None
 import org.http4k.lens.string
 import org.http4k.websocket.WsMessage
 import java.net.URL
+import java.time.Duration
 import java.time.Instant
 import java.time.LocalDate
 import java.time.LocalDateTime
@@ -46,6 +47,7 @@ open class ConfigurableMoshi(builder: Moshi.Builder) : AutoMarshallingJson() {
 }
 
 object Moshi : ConfigurableMoshi(Moshi.Builder()
+        .add(custom(Duration::parse))
         .add(custom({ LocalTime.parse(it, DateTimeFormatter.ISO_LOCAL_TIME) }, DateTimeFormatter.ISO_LOCAL_TIME::format))
         .add(custom({ LocalDate.parse(it, DateTimeFormatter.ISO_DATE) }, DateTimeFormatter.ISO_DATE::format))
         .add(custom({ LocalDateTime.parse(it, DateTimeFormatter.ISO_LOCAL_DATE_TIME) }, DateTimeFormatter.ISO_LOCAL_DATE_TIME::format))