content: /*
   * Copyright 2009 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.ailiwean.core.zxing.core.multi.qrcode.detector;
  
  import com.ailiwean.core.zxing.core.DecodeHintType;
  import com.ailiwean.core.zxing.core.NotFoundException;
  import com.ailiwean.core.zxing.core.ReaderException;
  import com.ailiwean.core.zxing.core.ResultPointCallback;
  import com.ailiwean.core.zxing.core.common.BitMatrix;
  import com.ailiwean.core.zxing.core.common.DetectorResult;
  import com.ailiwean.core.zxing.core.qrcode.detector.Detector;
  import com.ailiwean.core.zxing.core.qrcode.detector.FinderPatternInfo;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  
  /**
   * <p>Encapsulates logic that can detect one or more QR Codes in an image, even if the QR Code
   * is rotated or skewed, or partially obscured.</p>
   *
   * @author Sean Owen
   * @author Hannes Erven
   */
  public final class MultiDetector extends Detector {
  
    private static final DetectorResult[] EMPTY_DETECTOR_RESULTS = new DetectorResult[0];
  
    public MultiDetector(BitMatrix image) {
      super(image);
    }
  
    public DetectorResult[] detectMulti(Map<DecodeHintType,?> hints) throws NotFoundException {
      BitMatrix image = getImage();
      ResultPointCallback resultPointCallback =
          hints == null ? null : (ResultPointCallback) hints.get(DecodeHintType.NEED_RESULT_POINT_CALLBACK);
      MultiFinderPatternFinder finder = new MultiFinderPatternFinder(image, resultPointCallback);
      FinderPatternInfo[] infos = finder.findMulti(hints);
  
      if (infos.length == 0) {
        throw NotFoundException.getNotFoundInstance();
      }
  
      List<DetectorResult> result = new ArrayList<>();
      for (FinderPatternInfo info : infos) {
        try {
          result.add(processFinderPatternInfo(info));
        } catch (ReaderException e) {
          // ignore
        }
      }
      if (result.isEmpty()) {
        return EMPTY_DETECTOR_RESULTS;
      } else {
        return result.toArray(EMPTY_DETECTOR_RESULTS);
      }
    }
  
  }
  