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/*
* 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.google.zxing.multi.qrcode.detector;
import com.google.zxing.NotFoundException;
import com.google.zxing.ReaderException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.DetectorResult;
import com.google.zxing.qrcode.detector.Detector;
import com.google.zxing.qrcode.detector.FinderPatternInfo;
import java.util.Hashtable;
import java.util.Vector;
/**
* <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(Hashtable hints) throws NotFoundException {
BitMatrix image = getImage();
MultiFinderPatternFinder finder = new MultiFinderPatternFinder(image);
FinderPatternInfo[] info = finder.findMulti(hints);
if (info == null || info.length == 0) {
throw NotFoundException.getNotFoundInstance();
}
Vector result = new Vector();
for (int i = 0; i < info.length; i++) {
try {
result.addElement(processFinderPatternInfo(info[i]));
} catch (ReaderException e) {
// ignore
}
}
if (result.isEmpty()) {
return EMPTY_DETECTOR_RESULTS;
} else {
DetectorResult[] resultArray = new DetectorResult[result.size()];
for (int i = 0; i < result.size(); i++) {
resultArray[i] = (DetectorResult) result.elementAt(i);
}
return resultArray;
}
}
}
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