/*
    * 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 org.gbif.ws.client;
  
  import org.gbif.api.annotation.PartialDate;
  
  import java.lang.annotation.Annotation;
  import java.lang.reflect.Method;
  import java.util.Collection;
  
  import org.springframework.cloud.openfeign.AnnotatedParameterProcessor;
  
  import feign.MethodMetadata;
  import feign.Util;
  
  /**
   * Process method arguments annotated with annotation {@link PartialDate}.
   * Should be used instead of {@link org.springframework.web.bind.annotation.RequestParam}.
   * Only for date parameters!
   */
  public class PartialDateParameterProcessor implements AnnotatedParameterProcessor {
  
    private static final Class<PartialDate> ANNOTATION = PartialDate.class;
  
    private PartialDateExpandereExpander">PartialDateExpander partialDateExpander = new PartialDateExpander();
  
    @Override
    public Class<? extends Annotation> getAnnotationType() {
      return ANNOTATION;
    }
  
    @Override
    public boolean processArgument(
        AnnotatedParameterContext context, Annotation annotation, Method method) {
      int parameterIndex = context.getParameterIndex();
      MethodMetadata data = context.getMethodMetadata();
      PartialDate requestParam = ANNOTATION.cast(annotation);
      String name = requestParam.value();
  
      Util.checkState(Util.emptyToNull(name) != null, "PartialDate.value() was null");
  
      context.setParameterName(name);
  
      data.indexToExpander().put(parameterIndex, partialDateExpander);
      Collection<String> query =
          context.setTemplateParameter(name, data.template().queries().get(name));
      data.template().query(name, query);
  
      return true;
    }
  }