package com.atlassian.jira.rest.client.api.domain;
   
   import com.google.common.base.Objects;
   
   import javax.annotation.Nullable;
   
   /**
    * Represents a value that has changed in object related to Audit Record.
    *
   * @since v2.0
   */
  public class AuditChangedValue {
  
      private final String fieldName;
  
      @Nullable
      private final String changedTo;
  
      @Nullable
      private final String changedFrom;
  
      public AuditChangedValue(final String fieldName, @Nullable final String changedTo, @Nullable final String changedFrom) {
          this.fieldName = fieldName;
          this.changedTo = changedTo;
          this.changedFrom = changedFrom;
      }
  
      public String getFieldName() {
          return fieldName;
      }
  
      @Nullable
      public String getChangedTo() {
          return changedTo;
      }
  
      @Nullable
      public String getChangedFrom() {
          return changedFrom;
      }
  
      protected Objects.ToStringHelper getToStringHelper() {
          return Objects.toStringHelper(this).
                  add("fieldName", fieldName).
                  add("changedFrom", changedFrom).
                  add("changedTo", changedTo);
      }
  
      @Override
      public boolean equals(final Object o) {
          if (o instanceof AuditChangedValue) {
              final AuditChangedValue that = (AuditChangedValue) o;
              return Objects.equal(this.fieldName, that.fieldName)
                      && Objects.equal(this.changedFrom, that.changedFrom)
                      && Objects.equal(this.changedTo, that.changedTo);
          }
          return false;
      }
  
      @Override
      public int hashCode() {
          return Objects.hashCode(fieldName, changedFrom, changedTo);
      }
  
  }