StreamsTwitterMapper.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 *
 *   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 org.apache.streams.twitter.converter;

import org.apache.streams.data.util.RFC3339Utils;
import org.apache.streams.jackson.StreamsJacksonMapper;
import org.apache.streams.twitter.converter.util.TwitterActivityUtil;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.fasterxml.jackson.databind.module.SimpleModule;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;

/**
 * This class assist with handling twitter's date-time format during conversion
 *
 * <p/>
 * Deprecated: use StreamsJacksonMapper.getInstance() with TwitterDateTimeFormat on the classpath instead
 */
@Deprecated
public class StreamsTwitterMapper extends StreamsJacksonMapper {

  private static final Logger LOGGER = LoggerFactory.getLogger(TwitterActivityUtil.class);

  public static final String TWITTER_FORMAT = "EEE MMM dd HH:mm:ss Z yyyy";

  public static final DateTimeFormatter TWITTER_FORMATTER = DateTimeFormat.forPattern(TWITTER_FORMAT);

  /**
   * Convert to millis with TWITTER_FORMATTER.
   * @param dateTime dateTime as String
   * @return millis as Long
   */
  public static Long getMillis(String dateTime) {

    // this function is for pig which doesn't handle exceptions well
    try {
      return TWITTER_FORMATTER.parseMillis(dateTime);
    } catch ( Exception ex ) {
      return null;
    }

  }

  private static final StreamsTwitterMapper INSTANCE = new StreamsTwitterMapper();

  public static StreamsTwitterMapper getInstance() {
    return INSTANCE;
  }

  /**
   * StreamsTwitterMapper constructor.
   */
  public StreamsTwitterMapper() {
    super();
    registerModule(new SimpleModule() {
      {
        addDeserializer(DateTime.class, new StdDeserializer<DateTime>(DateTime.class) {
          @Override
          public DateTime deserialize(JsonParser jpar, DeserializationContext context) throws IOException, JsonProcessingException {
            DateTime result = null;
            try {
              result = TWITTER_FORMATTER.parseDateTime(jpar.getValueAsString());
            } catch ( Exception ignored ) {
              LOGGER.trace("ignored", ignored);
            }
            try {
              result = RFC3339Utils.getInstance().parseToUTC(jpar.getValueAsString());
            } catch ( Exception ignored ) {
              LOGGER.trace("ignored", ignored);
            }
            return result;
          }
        });
      }
    });

  }

}