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  package org.apache.cayenne;
  
  /**
   * An exception thrown during an attempt to delete an object that has a relationship to a
   * non-null related object, that has a DENY delete rule.
   * 
   * @since 1.2
   */
  public class DeleteDenyException extends CayenneRuntimeException {
  
      protected Persistent object;
      protected String relationship;
  
      public DeleteDenyException() {
      }
  
      public DeleteDenyException(String message) {
          super(message);
      }
  
      /**
       * @since 1.2
       */
      public DeleteDenyException(Persistent object, String relationship, String reason) {
          super(reason);
  
          this.object = object;
          this.relationship = relationship;
      }
  
      /**
       * @since 1.2
       */
      public Persistent getObject() {
          return object;
      }
  
      /**
       * @since 1.2
       */
      public String getRelationship() {
          return relationship;
      }
  
      @Override
      public String getMessage() {
          StringBuilder buffer = new StringBuilder();
          buffer.append("Can't delete object");
  
          if (object != null && object.getObjectId() != null) {
              buffer.append(" with OID ").append(object.getObjectId());
          }
  
          if (relationship != null) {
              buffer.append(". Reason: relationship '").append(relationship).append(
                      "' has 'deny' delete rule");
          }
  
          String message = super.getUnlabeledMessage();
          if (message != null) {
              buffer.append(". Details: ").append(message);
          }
  
          return buffer.toString();
      }
  }
  