Begin porting multi code finder

src/multi/qrcode/detector/multi_detector.rs

@@ -0,0 +1,62 @@
+/*
+ * 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.
+ */
+
+use crate::{qrcode::detector::{Detector, QRCodeDetectorResult}, common::{BitMatrix, DetectorRXingResult}, DecodingHintDictionary, Exceptions, DecodeHintType};
+
+use super::MultiFinderPatternFinder;
+
+/**
+ * <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
+ */
+pub struct MultiDetector(Detector);
+impl MultiDetector {
+  pub fn new(image: BitMatrix) -> Self {
+    Self(Detector::new(image))
+  }
+
+  // private static final DetectorRXingResult[] EMPTY_DETECTOR_RESULTS = new DetectorRXingResult[0];
+
+  pub fn detectMulti(&self,  hints:&DecodingHintDictionary) -> Result<Vec<QRCodeDetectorResult>,Exceptions> {
+    let image = self.0.getImage();
+    let resultPointCallback =
+         hints.get(&DecodeHintType::NEED_RESULT_POINT_CALLBACK);
+    let finder =  MultiFinderPatternFinder::new(image, resultPointCallback);
+    let infos = finder.findMulti(hints)?;
+
+    if infos.len() == 0 {
+      return Err(Exceptions::NotFoundException("".to_owned()))
+    }
+
+    let result = Vec::new();
+    for  info in infos {
+      if let Ok(potential) = self.0.processFinderPatternInfo(info){
+        result.push(potential);
+      }
+      // try {
+      //   result.add(processFinderPatternInfo(info));
+      // } catch (ReaderException e) {
+      //   // ignore
+      // }
+    }
+    
+    Ok(result)
+  }
+
+}