package com.facebook.presto.jdbc.internal.jackson.datatype.joda.deser;
import java.io.IOException;
import com.facebook.presto.jdbc.internal.joda.time.Duration;
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.databind.DeserializationContext;
import com.facebook.presto.jdbc.internal.jackson.databind.deser.std.StdScalarDeserializer;
/**
* Deserializes a Duration from either an int number of millis or using the {@link Duration#Duration(Object)}
* constructor on a JSON string. By default the only supported string format is that used by {@link
* Duration#toString()}. (That format for a 3,248 millisecond duration is "PT3.248S".)
*/
public final class DurationDeserializer extends StdScalarDeserializer<Duration>
{
public DurationDeserializer() { super(Duration.class); }
@Override
public Duration deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws
IOException, JsonProcessingException
{
switch (jsonParser.getCurrentToken()) {
case VALUE_NUMBER_INT: // assume it's millisecond count
return new Duration(jsonParser.getLongValue());
case VALUE_STRING:
return new Duration(jsonParser.getText());
}
throw deserializationContext.mappingException("expected JSON Number or String");
}
}