/*
    * 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
    * 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 org.apache.syncope.fit.buildtools.cxf;
  
  import java.lang.annotation.Annotation;
  import java.lang.reflect.Type;
  import java.util.Date;
  import javax.ws.rs.ext.ParamConverter;
  import javax.ws.rs.ext.ParamConverterProvider;
  import org.springframework.util.StringUtils;
  
  public class DateParamConverterProvider implements ParamConverterProvider {
  
      private static class DateParamConverter implements ParamConverter<Date> {
  
          @Override
          public Date fromString(final String value) {
              if (!StringUtils.hasText(value)) {
                  return null;
              }
              try {
                  return new Date(Long.parseLong(value));
              } catch (final NumberFormatException e) {
                  throw new IllegalArgumentException("Unparsable date: " + value, e);
              }
          }
  
          @Override
          public String toString(final Date value) {
              return value == null ? null : String.valueOf(value.getTime());
          }
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public <T> ParamConverter<T> getConverter(
              final Class<T> rawType, final Type genericType, final Annotation[] annotations) {
  
          if (Date.class.equals(rawType)) {
              return (ParamConverter<T>) new DateParamConverter();
          }
  
          return null;
      }
  }