Java API: added support for read/write functions in features2d

modules/java/android_test/src/org/opencv/test/OpenCVTestRunner.java

@@ -5,10 +5,7 @@ import android.test.AndroidTestRunner;
 import android.test.InstrumentationTestRunner;
 import android.util.Log;
 
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
+import org.opencv.Android;
 
 /**
  * This only class is Android specific. The original idea about test order
@@ -22,6 +19,7 @@ public class OpenCVTestRunner extends InstrumentationTestRunner {
     public static String LENA_PATH;
     public static String CHESS_PATH;
     public static String LBPCASCADE_FRONTALFACE_PATH;
+    public static Context context;
 
     private AndroidTestRunner androidTestRunner;
     private static String TAG = "opencv_test_java";
@@ -32,9 +30,10 @@ public class OpenCVTestRunner extends InstrumentationTestRunner {
     
     @Override
     public void onStart() {
-        LENA_PATH = ExportResource(R.drawable.lena);
-        CHESS_PATH = ExportResource(R.drawable.chessboard);
-        LBPCASCADE_FRONTALFACE_PATH = ExportResource(R.raw.lbpcascade_frontalface);
+        context = getContext();
+        LENA_PATH = Android.ExportResource(context, R.drawable.lena);
+        CHESS_PATH = Android.ExportResource(context, R.drawable.chessboard);
+        LBPCASCADE_FRONTALFACE_PATH = Android.ExportResource(context, R.raw.lbpcascade_frontalface);
 
         // List<TestCase> testCases = androidTestRunner.getTestCases();
         // Collections.shuffle(testCases); //shuffle the tests order
@@ -47,32 +46,4 @@ public class OpenCVTestRunner extends InstrumentationTestRunner {
         androidTestRunner = super.getAndroidTestRunner();
         return androidTestRunner;
     }
-
-    private String ExportResource(int resourceId) {
-        String fullname = getContext().getResources().getString(resourceId);
-        String resName = fullname.substring(fullname.lastIndexOf("/") + 1);
-        try {
-            InputStream is = getContext().getResources().openRawResource(
-                    resourceId);
-            File resDir = getContext().getDir("testdata", Context.MODE_PRIVATE);
-            File resFile = new File(resDir, resName);
-
-            FileOutputStream os = new FileOutputStream(resFile);
-
-            byte[] buffer = new byte[4096];
-            int bytesRead;
-            while ((bytesRead = is.read(buffer)) != -1) {
-                os.write(buffer, 0, bytesRead);
-            }
-            is.close();
-            os.close();
-
-            return resFile.getAbsolutePath();
-        } catch (IOException e) {
-            e.printStackTrace();
-            Log("Failed to export resource " + resName + ". Exception thrown: "
-                    + e);
-        }
-        return null;
-    }
 }

modules/java/android_test/src/org/opencv/test/features2d/features2dTest.java

@@ -2,7 +2,5 @@ package org.opencv.test.features2d;
 
 import org.opencv.test.OpenCVTestCase;
 
-
 public class features2dTest extends OpenCVTestCase {
-
 }

modules/java/gen_javadoc.py

@@ -22,8 +22,14 @@ class JavadocGenerator(object):
         assert args_start * args_end > 0
         if args_start >= 0:
             assert args_start < args_end
-            return (line[:args_start].strip(), offset,  filter(None, list(arg.strip() for arg in line[args_start+1:args_end].split(","))))
-        return (line, offset, [])
+            name = line[:args_start].strip()
+            if name.startswith("java"):
+                name = name[4:]
+            return (name, offset,  filter(None, list(arg.strip() for arg in line[args_start+1:args_end].split(","))))
+        name = line.strip()
+        if name.startswith("java"):
+            name = name[4:]
+        return (name, offset, [])
 
     def document(self, infile, outfile):
         inf = open(infile, "rt")

modules/java/src/cpp/features2d_manual.hpp

@@ -12,8 +12,6 @@ public:
 #if 0
     CV_WRAP void detect( const Mat& image, vector<KeyPoint>& keypoints, const Mat& mask=Mat() ) const;
     CV_WRAP void detect( const vector<Mat>& images, vector<vector<KeyPoint> >& keypoints, const vector<Mat>& masks=vector<Mat>() ) const;
-    CV_WRAP virtual void read( const FileNode& );
-    CV_WRAP virtual void write( FileStorage& ) const;
     CV_WRAP virtual bool empty() const;
 #endif
 
@@ -25,6 +23,20 @@ public:
         detector.addref();
         return (javaFeatureDetector*)((FeatureDetector*) detector);
     }
+
+    CV_WRAP void write( const string& fileName ) const
+    {
+        FileStorage fs(fileName, FileStorage::WRITE);
+        ((FeatureDetector*)this)->write(fs);
+        fs.release();
+    }
+
+    CV_WRAP void read( const string& fileName )
+    {
+        FileStorage fs(fileName, FileStorage::READ);
+        ((FeatureDetector*)this)->read(fs.root());
+        fs.release();
+    }
 };
 
 class CV_EXPORTS_AS(DescriptorMatcher) javaDescriptorMatcher : public DescriptorMatcher
@@ -51,9 +63,6 @@ public:
            const vector<Mat>& masks=vector<Mat>(), bool compactResult=false );
     CV_WRAP void radiusMatch( const Mat& queryDescriptors, vector<vector<DMatch> >& matches, float maxDistance,
                    const vector<Mat>& masks=vector<Mat>(), bool compactResult=false );
-    CV_WRAP virtual void read( const FileNode& );
-    // Writes matcher object to a file storage
-    CV_WRAP virtual void write( FileStorage& ) const;
 #endif
 
     CV_WRAP_AS(clone) javaDescriptorMatcher* jclone( bool emptyTrainData=false ) const
@@ -70,6 +79,20 @@ public:
         matcher.addref();
         return (javaDescriptorMatcher*)((DescriptorMatcher*) matcher);
     }
+
+    CV_WRAP void write( const string& fileName ) const
+    {
+        FileStorage fs(fileName, FileStorage::WRITE);
+        ((DescriptorMatcher*)this)->write(fs);
+        fs.release();
+    }
+
+    CV_WRAP void read( const string& fileName )
+    {
+        FileStorage fs(fileName, FileStorage::READ);
+        ((DescriptorMatcher*)this)->read(fs.root());
+        fs.release();
+    }
 };
 
 class CV_EXPORTS_AS(DescriptorExtractor) javaDescriptorExtractor : public DescriptorExtractor
@@ -78,8 +101,6 @@ public:
 #if 0
     CV_WRAP void compute( const Mat& image, vector<KeyPoint>& keypoints, Mat& descriptors ) const;
     CV_WRAP void compute( const vector<Mat>& images, vector<vector<KeyPoint> >& keypoints, vector<Mat>& descriptors ) const;
-    CV_WRAP virtual void read( const FileNode& );
-    CV_WRAP virtual void write( FileStorage& ) const;
     CV_WRAP virtual int descriptorSize() const = 0;
     CV_WRAP virtual int descriptorType() const = 0;
 
@@ -94,6 +115,20 @@ public:
         extractor.addref();
         return (javaDescriptorExtractor*)((DescriptorExtractor*) extractor);
     }
+
+    CV_WRAP void write( const string& fileName ) const
+    {
+        FileStorage fs(fileName, FileStorage::WRITE);
+        ((DescriptorExtractor*)this)->write(fs);
+        fs.release();
+    }
+
+    CV_WRAP void read( const string& fileName )
+    {
+        FileStorage fs(fileName, FileStorage::READ);
+        ((DescriptorExtractor*)this)->read(fs.root());
+        fs.release();
+    }
 };
 
 #if 0

modules/java/src/java/Android.java

@@ -1,10 +1,48 @@
 package org.opencv;
 
+import org.opencv.core.CvException;
 import org.opencv.core.Mat;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import android.content.Context;
 import android.graphics.Bitmap;
 
 public class Android {
 
+    public static String ExportResource(Context context, int resourceId) {
+        return ExportResource(context, resourceId, "OpenCV_data");
+    }
+
+    public static String ExportResource(Context context, int resourceId, String dirname) {
+        String fullname = context.getResources().getString(resourceId);
+        String resName = fullname.substring(fullname.lastIndexOf("/") + 1);
+        try {
+            InputStream is = context.getResources().openRawResource(resourceId);
+            File resDir = context.getDir(dirname, Context.MODE_PRIVATE);
+            File resFile = new File(resDir, resName);
+
+            FileOutputStream os = new FileOutputStream(resFile);
+
+            byte[] buffer = new byte[4096];
+            int bytesRead;
+            while ((bytesRead = is.read(buffer)) != -1) {
+                os.write(buffer, 0, bytesRead);
+            }
+            is.close();
+            os.close();
+
+            return resFile.getAbsolutePath();
+        } catch (IOException e) {
+            e.printStackTrace();
+            throw new CvException("Failed to export resource " + resName
+                    + ". Exception thrown: " + e);
+        }
+    }
+
     public static Mat BitmapToMat(Bitmap b) {
         return new Mat(nBitmapToMat(b));
     }
@@ -14,7 +52,11 @@ public class Android {
     }
 
     // native stuff
-	static { System.loadLibrary("opencv_java"); }
+    static {
+        System.loadLibrary("opencv_java");
+    }
+
     private static native long nBitmapToMat(Bitmap b);
+
     private static native boolean nMatToBitmap(long m, Bitmap b);
 }

modules/java/src/java/core+CvException.java

@@ -1,6 +1,6 @@
 package org.opencv.core;
 
-public class CvException extends Exception {
+public class CvException extends RuntimeException {
 
 	private static final long serialVersionUID = 1L;