zxing/csharp/client/result/ISBNResultParser.cs

/*
 * Copyright 2008 ZXing authors
 *
 * 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.
 */

namespace com.google.zxing.client.result
{

	using BarcodeFormat = com.google.zxing.BarcodeFormat;
	using Result = com.google.zxing.Result;

	/// <summary>
	/// Parses strings of digits that represent a ISBN.
	/// 
	/// @author jbreiden@google.com (Jeff Breidenbach)
	/// </summary>
	public sealed class ISBNResultParser : ResultParser
	{

	  /// <summary>
	  /// See <a href="http://www.bisg.org/isbn-13/for.dummies.html">ISBN-13 For Dummies</a>
	  /// </summary>
	  public override ParsedResult parse(Result result)
	  {
		BarcodeFormat format = result.BarcodeFormat;
		if (format != BarcodeFormat.EAN_13)
		{
		  return null;
		}
		string rawText = getMassagedText(result);
		int length = rawText.Length;
		if (length != 13)
		{
		  return null;
		}
		if (!rawText.StartsWith("978") && !rawText.StartsWith("979"))
		{
		  return null;
		}

		return new ISBNParsedResult(rawText);
	  }

	}

}