using System.Collections.Generic;
/*
* Copyright 2007 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
{
using AztecReader = com.google.zxing.aztec.AztecReader;
using DataMatrixReader = com.google.zxing.datamatrix.DataMatrixReader;
using MaxiCodeReader = com.google.zxing.maxicode.MaxiCodeReader;
using MultiFormatOneDReader = com.google.zxing.oned.MultiFormatOneDReader;
using PDF417Reader = com.google.zxing.pdf417.PDF417Reader;
using QRCodeReader = com.google.zxing.qrcode.QRCodeReader;
/// <summary>
/// MultiFormatReader is a convenience class and the main entry point into the library for most uses.
/// By default it attempts to decode all barcode formats that the library supports. Optionally, you
/// can provide a hints object to request different behavior, for example only decoding QR codes.
///
/// @author Sean Owen
/// @author dswitkin@google.com (Daniel Switkin)
/// </summary>
public sealed class MultiFormatReader : Reader
{
//JAVA TO C# CONVERTER TODO TASK: Java wildcard generics are not converted to .NET:
//ORIGINAL LINE: private java.util.Map<DecodeHintType,?> hints;
private IDictionary<DecodeHintType, object> hints;
private Reader[] readers;
/// <summary>
/// This version of decode honors the intent of Reader.decode(BinaryBitmap) in that it
/// passes null as a hint to the decoders. However, that makes it inefficient to call repeatedly.
/// Use setHints() followed by decodeWithState() for continuous scan applications.
/// </summary>
/// <param name="image"> The pixel data to decode </param>
/// <returns> The contents of the image </returns>
/// <exception cref="NotFoundException"> Any errors which occurred </exception>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: public Result decode(BinaryBitmap image) throws NotFoundException
public Result decode(BinaryBitmap image)
{
Hints = null;
return decodeInternal(image);
}
/// <summary>
/// Decode an image using the hints provided. Does not honor existing state.
/// </summary>
/// <param name="image"> The pixel data to decode </param>
/// <param name="hints"> The hints to use, clearing the previous state. </param>
/// <returns> The contents of the image </returns>
/// <exception cref="NotFoundException"> Any errors which occurred </exception>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: public Result decode(BinaryBitmap image, java.util.Map<DecodeHintType,?> hints) throws NotFoundException
public Result decode(BinaryBitmap image, IDictionary<DecodeHintType, object> hints)
{
Hints = hints;
return decodeInternal(image);
}
/// <summary>
/// Decode an image using the state set up by calling setHints() previously. Continuous scan
/// clients will get a <b>large</b> speed increase by using this instead of decode().
/// </summary>
/// <param name="image"> The pixel data to decode </param>
/// <returns> The contents of the image </returns>
/// <exception cref="NotFoundException"> Any errors which occurred </exception>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: public Result decodeWithState(BinaryBitmap image) throws NotFoundException
public Result decodeWithState(BinaryBitmap image)
{
// Make sure to set up the default state so we don't crash
if (readers == null)
{
Hints = null;
}
return decodeInternal(image);
}
/// <summary>
/// This method adds state to the MultiFormatReader. By setting the hints once, subsequent calls
/// to decodeWithState(image) can reuse the same set of readers without reallocating memory. This
/// is important for performance in continuous scan clients.
/// </summary>
/// <param name="hints"> The set of hints to use for subsequent calls to decode(image) </param>
public IDictionary<DecodeHintType, object> Hints
{
set
{
this.hints = value;
bool tryHarder = value != null && value.ContainsKey(DecodeHintType.TRY_HARDER);
//ICollection<BarcodeFormat> formats = value == null ? null : (ICollection<BarcodeFormat>) value[DecodeHintType.POSSIBLE_FORMATS];
ICollection<BarcodeFormat> formats = null;
if (value != null && value.ContainsKey(DecodeHintType.POSSIBLE_FORMATS))
{
formats = (ICollection<BarcodeFormat>)value[DecodeHintType.POSSIBLE_FORMATS];
}
List<Reader> readers = new List<Reader>();
if (formats != null)
{
bool addOneDReader = formats.Contains(BarcodeFormat.UPC_A) || formats.Contains(BarcodeFormat.UPC_E) || formats.Contains(BarcodeFormat.EAN_13) || formats.Contains(BarcodeFormat.EAN_8) || formats.Contains(BarcodeFormat.CODABAR) || formats.Contains(BarcodeFormat.CODE_39) || formats.Contains(BarcodeFormat.CODE_93) || formats.Contains(BarcodeFormat.CODE_128) || formats.Contains(BarcodeFormat.ITF) || formats.Contains(BarcodeFormat.RSS_14) || formats.Contains(BarcodeFormat.RSS_EXPANDED);
// Put 1D readers upfront in "normal" mode
if (addOneDReader && !tryHarder)
{
readers.Add(new MultiFormatOneDReader(value));
}
if (formats.Contains(BarcodeFormat.QR_CODE))
{
readers.Add(new QRCodeReader());
}
if (formats.Contains(BarcodeFormat.DATA_MATRIX))
{
readers.Add(new DataMatrixReader());
}
if (formats.Contains(BarcodeFormat.AZTEC))
{
readers.Add(new AztecReader());
}
if (formats.Contains(BarcodeFormat.PDF_417))
{
readers.Add(new PDF417Reader());
}
if (formats.Contains(BarcodeFormat.MAXICODE))
{
readers.Add(new MaxiCodeReader());
}
// At end in "try harder" mode
if (addOneDReader && tryHarder)
{
readers.Add(new MultiFormatOneDReader(value));
}
}
if (readers.Count == 0)
{
if (!tryHarder)
{
readers.Add(new MultiFormatOneDReader(value));
}
readers.Add(new QRCodeReader());
readers.Add(new DataMatrixReader());
readers.Add(new AztecReader());
readers.Add(new PDF417Reader());
readers.Add(new MaxiCodeReader());
if (tryHarder)
{
readers.Add(new MultiFormatOneDReader(value));
}
}
this.readers = readers.ToArray(/*new Reader[readers.Count]*/);
}
}
public void reset()
{
if (readers != null)
{
foreach (Reader reader in readers)
{
reader.reset();
}
}
}
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: private Result decodeInternal(BinaryBitmap image) throws NotFoundException
private Result decodeInternal(BinaryBitmap image)
{
if (readers != null)
{
foreach (Reader reader in readers)
{
try
{
return reader.decode(image, hints);
}
catch (ReaderException re)
{
// continue
}
}
}
throw NotFoundException.NotFoundInstance;
}
}
}