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Tool that generates code for RPC between the Kurento Media Server and remote libraries.

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/*
 * The MIT License
 *
 * Copyright 2012-2014 Zafar Khaja ([email protected]).
 *
 * 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 com.github.zafarkhaja.semver.expr;

import java.util.Arrays;

import com.github.zafarkhaja.semver.ParseException;
import com.github.zafarkhaja.semver.expr.Lexer.Token;
import com.github.zafarkhaja.semver.util.UnexpectedElementException;

/**
 * Thrown when a token of unexpected types is encountered during the parsing.
 *
 * @author Zafar Khaja ([email protected])
 * @since 0.7.0
 */
public class UnexpectedTokenException extends ParseException {

  private static final long serialVersionUID = -7063263679094551320L;

  /**
   * The unexpected token.
   */
  private final Token unexpected;

  /**
   * The array of the expected token types.
   */
  private final Token.Type[] expected;

  /**
   * Constructs a {@code UnexpectedTokenException} instance with the wrapped
   * {@code UnexpectedElementException} exception.
   *
   * @param cause
   *          the wrapped exception
   */
  UnexpectedTokenException(UnexpectedElementException cause) {
    unexpected = (Token) cause.getUnexpectedElement();
    expected = (Token.Type[]) cause.getExpectedElementTypes();
  }

  /**
   * Constructs a {@code UnexpectedTokenException} instance with the unexpected token and the
   * expected types.
   *
   * @param token
   *          the unexpected token
   * @param expected
   *          an array of the expected token types
   */
  UnexpectedTokenException(Token token, Token.Type... expected) {
    unexpected = token;
    this.expected = expected;
  }

  /**
   * Gets the unexpected token.
   *
   * @return the unexpected token
   */
  Token getUnexpectedToken() {
    return unexpected;
  }

  /**
   * Gets the expected token types.
   *
   * @return an array of expected token types
   */
  Token.Type[] getExpectedTokenTypes() {
    return expected;
  }

  /**
   * Returns the string representation of this exception containing the information about the
   * unexpected token and, if available, about the expected types.
   *
   * @return the string representation of this exception
   */
  @Override
  public String toString() {
    String message = String.format("Unexpected token '%s'", unexpected);
    if (expected.length > 0) {
      message += String.format(", expecting '%s'", Arrays.toString(expected));
    }
    return message;
  }
}