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/*
 * Copyright (C) 2015 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.
 */

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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;
    }
  }
}