/*
* Copyright 2010 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.
*/
package com.google.zxing.aztec;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.FormatException;
import com.google.zxing.NotFoundException;
import com.google.zxing.Reader;
import com.google.zxing.Result;
import com.google.zxing.ResultMetadataType;
import com.google.zxing.ResultPoint;
import com.google.zxing.ResultPointCallback;
import com.google.zxing.common.DecoderResult;
import com.google.zxing.aztec.decoder.Decoder;
import com.google.zxing.aztec.detector.Detector;
import java.util.List;
import java.util.Map;
/**
* This implementation can detect and decode Aztec codes in an image.
*
* @author David Olivier
*/
public final class AztecReader implements Reader {
/**
* Locates and decodes a Data Matrix code in an image.
*
* @return a String representing the content encoded by the Data Matrix code
* @throws NotFoundException if a Data Matrix code cannot be found
* @throws FormatException if a Data Matrix code cannot be decoded
* @throws com.google.zxing.ChecksumException if error correction fails
*/
@Override
public Result decode(BinaryBitmap image) throws NotFoundException, FormatException {
return decode(image, null);
}
@Override
public Result decode(BinaryBitmap image, Map<DecodeHintType,?> hints)
throws NotFoundException, FormatException {
AztecDetectorResult detectorResult = new Detector(image.getBlackMatrix()).detect();
ResultPoint[] points = detectorResult.getPoints();
if (hints != null) {
ResultPointCallback rpcb = (ResultPointCallback) hints.get(DecodeHintType.NEED_RESULT_POINT_CALLBACK);
if (rpcb != null) {
for (ResultPoint point : points) {
rpcb.foundPossibleResultPoint(point);
}
}
}
DecoderResult decoderResult = new Decoder().decode(detectorResult);
Result result = new Result(decoderResult.getText(), decoderResult.getRawBytes(), points, BarcodeFormat.AZTEC);
List<byte[]> byteSegments = decoderResult.getByteSegments();
if (byteSegments != null) {
result.putMetadata(ResultMetadataType.BYTE_SEGMENTS, byteSegments);
}
String ecLevel = decoderResult.getECLevel();
if (ecLevel != null) {
result.putMetadata(ResultMetadataType.ERROR_CORRECTION_LEVEL, ecLevel);
}
return result;
}
@Override
public void reset() {
// do nothing
}
}