package com.facebook.presto.jdbc.internal.jackson.datatype.joda.deser;
import java.io.IOException;
import com.facebook.presto.jdbc.internal.joda.time.Instant;
import com.facebook.presto.jdbc.internal.jackson.core.JsonParser;
import com.facebook.presto.jdbc.internal.jackson.core.JsonProcessingException;
import com.facebook.presto.jdbc.internal.jackson.core.JsonToken;
import com.facebook.presto.jdbc.internal.jackson.databind.DeserializationContext;
/**
* Basic deserializer for {@link com.facebook.presto.jdbc.internal.joda.time.ReadableDateTime} and its subtypes.
* Accepts JSON String and Number values and passes those to single-argument constructor.
* Does not (yet?) support JSON object; support can be added if desired.
*/
public class InstantDeserializer
extends JodaDeserializerBase<Instant>
{
public InstantDeserializer() {
super(Instant.class);
}
@Override
public Instant deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException, JsonProcessingException
{
JsonToken t = jp.getCurrentToken();
if (t == JsonToken.VALUE_NUMBER_INT) {
return new Instant(jp.getLongValue());
}
if (t == JsonToken.VALUE_STRING) {
String str = jp.getText().trim();
if (str.length() == 0) { // [JACKSON-360]
return null;
}
return new Instant(str);
}
throw ctxt.mappingException(getValueClass());
}
}