OpenClosedPrincipleproblem/SquareToCircleConverter.java

public class SquareToCircleConverter implements ShapeConverter<Square, Circle> {
    @Override
    public Circle convert(Square source) {
        if (!canConvert(source)) {
            throw new IllegalArgumentException("Cannot convert null square");
        }
        
        // Calculate radius of circle with equal area to the square
        double squareArea = source.calculateArea();
        double circleRadius = Math.sqrt(squareArea / Math.PI);
        
        // Create circle with the same color as the square
        return new Circle(circleRadius, source.getColor());
    }
    
    @Override
    public boolean canConvert(Square source) {
        return source != null && source.getSide() > 0;
    }
    
    @Override
    public String getConversionDescription() {
        return "Converts a square to a circle with equal area and same color";
    }
}