001package ball.databind;
002/*-
003 * ##########################################################################
004 * Data Binding Utilities
005 * $Id: UNIXTimeStampDeserializer.java 6118 2020-06-04 19:31:45Z ball $
006 * $HeadURL: svn+ssh://svn.hcf.dev/var/spool/scm/repository.svn/ball-databind/trunk/src/main/java/ball/databind/UNIXTimeStampDeserializer.java $
007 * %%
008 * Copyright (C) 2016 - 2020 Allen D. Ball
009 * %%
010 * Licensed under the Apache License, Version 2.0 (the "License");
011 * you may not use this file except in compliance with the License.
012 * You may obtain a copy of the License at
013 *
014 *      http://www.apache.org/licenses/LICENSE-2.0
015 *
016 * Unless required by applicable law or agreed to in writing, software
017 * distributed under the License is distributed on an "AS IS" BASIS,
018 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
019 * See the License for the specific language governing permissions and
020 * limitations under the License.
021 * ##########################################################################
022 */
023import com.fasterxml.jackson.core.JsonParser;
024import com.fasterxml.jackson.core.JsonProcessingException;
025import com.fasterxml.jackson.databind.DeserializationContext;
026import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
027import java.io.IOException;
028import java.util.Date;
029import lombok.ToString;
030
031/**
032 * UNIX Time Stamp (seconds since epoch)
033 * {@link com.fasterxml.jackson.databind.JsonDeserializer}.
034 *
035 * @author {@link.uri mailto:ball@hcf.dev Allen D. Ball}
036 * @version $Revision: 6118 $
037 */
038@ToString
039public class UNIXTimeStampDeserializer extends StdDeserializer<Long> {
040    private static final long serialVersionUID = 4297437977249133382L;
041
042    /**
043     * Sole constructor.
044     */
045    public UNIXTimeStampDeserializer() { super(Long.class); }
046
047    @Override
048    public Long deserialize(JsonParser parser,
049                            DeserializationContext context) throws IOException,
050                                                                   JsonProcessingException {
051        Date date = parser.getCodec().readValue(parser, Date.class);
052
053        return (date != null) ? (date.getTime() / 1000) : null;
054    }
055}
056