com.spotify.docker.client.jackson.UnixTimestampDeserializer Maven / Gradle / Ivy
/*-
* -\-\-
* docker-client
* --
* Copyright (C) 2016 Spotify AB
* --
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* -/-/-
*/
package com.spotify.docker.client.jackson;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.JsonToken;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import java.io.IOException;
import java.util.Date;
/**
* A deserializer for Dates where the source data is in seconds since the epoch rather than
* milliseconds as {@link Date} expects.
*/
public class UnixTimestampDeserializer extends JsonDeserializer {
public UnixTimestampDeserializer() {
}
@Override
public Date deserialize(final JsonParser parser, final DeserializationContext ctxt)
throws IOException, JsonProcessingException {
final JsonToken token = parser.getCurrentToken();
if (token == JsonToken.VALUE_STRING) {
final String str = parser.getText().trim();
return toDate(Long.parseLong(str));
} else if (token == JsonToken.VALUE_NUMBER_INT) {
return toDate(parser.getLongValue());
}
throw ctxt.wrongTokenException(parser, JsonToken.VALUE_STRING,
"Expected a string or numeric value");
}
private static Date toDate(long secondsSinceEpoch) {
return new Date(secondsSinceEpoch * 1000);
}
}