package com.atlassian.jira.rest.client.internal.json.gen;
   
   import com.atlassian.jira.rest.client.api.domain.input.FieldInput;
   import org.codehaus.jettison.json.JSONException;
   import org.codehaus.jettison.json.JSONObject;
   
   public class IssueUpdateJsonGenerator implements JsonGenerator<Iterable<FieldInput>> {
       private final ComplexIssueInputFieldValueJsonGenerator generator = new ComplexIssueInputFieldValueJsonGenerator();
   
      @Override
      public JSONObject generate(Iterable<FieldInput> fieldInputs) throws JSONException {
          final JSONObject fields = new JSONObject();
          if (fieldInputs != null) {
              for (final FieldInput field : fieldInputs) {
                  final Object fieldValue = (field.getValue() == null) ? JSONObject.NULL
                          : generator.generateFieldValueForJson(field.getValue());
  
                  fields.put(field.getId(), fieldValue);
              }
          }
          return fields;
      }
  }