/*
    * Copyright 2002-2019 the original author or authors.
    *
    * 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
    *
    *      https://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.springframework.security.oauth2.common.util;
  
  import java.io.IOException;
  import java.text.ParseException;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  
  import com.fasterxml.jackson.core.JsonParseException;
  import com.fasterxml.jackson.core.JsonProcessingException;
  import com.fasterxml.jackson.databind.DeserializationContext;
  import com.fasterxml.jackson.databind.JsonDeserializer;
  
  /**
   * JSON deserializer for Jackson to handle regular date instances as timestamps in ISO format.
   * 
   * @author Dave Syer
   *
   */
  public class JsonDateDeserializer extends JsonDeserializer<Date> {
  	 
      private static final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
   
  	@Override
  	public Date deserialize(com.fasterxml.jackson.core.JsonParser parser, DeserializationContext context) throws IOException, JsonProcessingException {
  		try {
  			synchronized (dateFormat) {				
  				return dateFormat.parse(parser.getText());
  			}
  		}
  		catch (ParseException e) {
  			throw new JsonParseException("Could not parse date", parser.getCurrentLocation(), e);
  		}
  	}
  }