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package org.opencv.core;

import java.util.Arrays;
import java.util.List;

import org.opencv.features2d.KeyPoint;

public class MatOfKeyPoint extends Mat {
    // 32FC7
    private static final int _depth = CvType.CV_32F;
    private static final int _channels = 7;

    public MatOfKeyPoint() {
        super();
    }

    protected MatOfKeyPoint(long addr) {
        super(addr);
        if( !empty() && checkVector(_channels, _depth) < 0 )
            throw new IllegalArgumentException("Incompatible Mat");
        //FIXME: do we need release() here?
    }

    public static MatOfKeyPoint fromNativeAddr(long addr) {
        return new MatOfKeyPoint(addr);
    }

    public MatOfKeyPoint(Mat m) {
        super(m, Range.all());
        if( !empty() && checkVector(_channels, _depth) < 0 )
            throw new IllegalArgumentException("Incompatible Mat");
        //FIXME: do we need release() here?
    }

    public MatOfKeyPoint(KeyPoint...a) {
        super();
        fromArray(a);
    }

    public void alloc(int elemNumber) {
        if(elemNumber>0)
            super.create(elemNumber, 1, CvType.makeType(_depth, _channels));
    }

    public void fromArray(KeyPoint...a) {
        if(a==null || a.length==0)
            return;
        int num = a.length;
        alloc(num);
        float buff[] = new float[num * _channels];
        for(int i=0; i lkp) {
        KeyPoint akp[] = lkp.toArray(new KeyPoint[0]);
        fromArray(akp);
    }

    public List toList() {
        KeyPoint[] akp = toArray();
        return Arrays.asList(akp);
    }
}