content: /* Alloy Analyzer 4 -- Copyright (c) 2006-2009, Felix Chang
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files
   * (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify,
   * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
   * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
   * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
   * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  package edu.mit.csail.sdg.alloy4;
  
  /** Immutable; this represents an API usage error. */
  
  public final class ErrorAPI extends Err {
  
      /** This ensures this class can be serialized reliably. */
      private static final long serialVersionUID = 0;
  
      /**
       * Constructs a new API usage error.
       *
       * @param msg - the actual error message (can be null)
       */
      public ErrorAPI(String msg) {
          super(null, msg, null);
      }
  
      /**
       * Constructs a new API usage error with "cause" as the underlying cause.
       *
       * @param msg - the actual error message (can be null)
       * @param cause - if nonnull, it is the cause of this exception
       */
      public ErrorAPI(String msg, Throwable cause) {
          super(null, msg, cause);
      }
  
      /**
       * Constructs a new API usage error.
       *
       * @param pos - the filename/line/row information (can be null if unknown)
       * @param msg - the actual error message (can be null)
       */
      public ErrorAPI(Pos pos, String msg) {
          super(pos, msg, null);
      }
  
      /** Returns a textual description of the error. */
      @Override
      public String toString() {
          if (pos == Pos.UNKNOWN)
              return "API usage error:\n" + msg;
          if (pos.filename.length() > 0)
              return "API usage error in " + pos.filename + " at line " + pos.y + " column " + pos.x + ":\n" + msg;
          return "API usage error at line " + pos.y + " column " + pos.x + ":\n" + msg;
      }
  }
  