/*
 * Copyright (C) 2018 Google, Inc.
 *
 * 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 com.google.escapevelocity;

/**
 * An exception that occurred while parsing a template.
 *
 * @author emcmanus@google.com (Éamonn McManus)
 */
public class ParseException extends RuntimeException {
  private static final long serialVersionUID = 1;

  ParseException(String message, String resourceName, int lineNumber) {
    super(message + ", " + where(resourceName, lineNumber));
  }

  ParseException(String message, String resourceName, int lineNumber, String context) {
    super(message + ", " + where(resourceName, lineNumber) + ", at text starting: " + context);
  }

  private static String where(String resourceName, int lineNumber) {
    if (resourceName == null) {
      return "on line " + lineNumber;
    } else {
      return "on line " + lineNumber + " of " + resourceName;
    }
  }
}