45 lines
1.6 KiB
Kotlin
45 lines
1.6 KiB
Kotlin
import com.squareup.moshi.JsonAdapter
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import com.squareup.moshi.JsonEncodingException
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import com.squareup.moshi.JsonReader
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import com.squareup.moshi.JsonWriter
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import org.joda.time.format.DateTimeFormat
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import org.joda.time.format.DateTimeFormatter
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import java.util.Arrays
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abstract class AbstractDateJsonAdapter<T>(
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private val formats: Array<String>
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) : JsonAdapter<T>() {
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companion object {
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private const val CANT_FIND_ANY_FORMATTERS = "Can't find any DateTimeFormatter"
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}
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private val formatters = formats.map(DateTimeFormat::forPattern)
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override fun fromJson(reader: JsonReader): T? {
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val dateTimeString = reader.nextString()
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formatters.forEachIndexed { index, dateTimeFormatter ->
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try {
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return fromJsonInner(dateTimeString, dateTimeFormatter)
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} catch (e: IllegalArgumentException) {
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if (index == formatters.lastIndex) {
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throw JsonEncodingException("$dateTimeString doesn't fit any of the formats ${Arrays.toString(formats)}")
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}
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}
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}
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throw IllegalArgumentException(CANT_FIND_ANY_FORMATTERS)
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}
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override fun toJson(writer: JsonWriter, value: T?) {
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if (formatters.isEmpty()) throw IllegalArgumentException(CANT_FIND_ANY_FORMATTERS)
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value?.let {
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writer.value(toJsonInner(value, formatters.first()))
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} ?: throw JsonEncodingException("Value can't be null")
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}
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abstract fun fromJsonInner(value: String, dateTimeFormatter: DateTimeFormatter): T
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abstract fun toJsonInner(value: T?, dateTimeFormatter: DateTimeFormatter) : String?
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}
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