OpenClosedPrincipleproblem/ShapeStatisticsAnalyzer.java

import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class ShapeStatisticsAnalyzer {
    private List<Shape> shapes;
    
    public ShapeStatisticsAnalyzer(List<Shape> shapes) {
        this.shapes = shapes;
    }
    
    // Count shapes by their type
    public Map<String, Integer> countShapesByType() {
        Map<String, Integer> typeCount = new HashMap<>();
        
        for (Shape shape : shapes) {
            String typeName = shape.getClass().getSimpleName();
            typeCount.put(typeName, typeCount.getOrDefault(typeName, 0) + 1);
        }
        
        return typeCount;
    }
    
    // Count shapes by their color
    public Map<String, Integer> countShapesByColor() {
        Map<String, Integer> colorCount = new HashMap<>();
        
        for (Shape shape : shapes) {
            String color = shape.getColor().toLowerCase();
            colorCount.put(color, colorCount.getOrDefault(color, 0) + 1);
        }
        
        return colorCount;
    }
    
    // Calculate the total area of all shapes
    public double calculateTotalArea() {
        double totalArea = 0;
        
        for (Shape shape : shapes) {
            totalArea += shape.calculateArea();
        }
        
        return totalArea;
    }
    
    // Calculate area percentage by shape type
    public Map<String, Double> calculateAreaPercentageByType() {
        Map<String, Double> typeArea = new HashMap<>();
        double totalArea = calculateTotalArea();
        
        if (totalArea == 0) {
            return new HashMap<>();
        }
        
        // First calculate total area for each type
        for (Shape shape : shapes) {
            String typeName = shape.getClass().getSimpleName();
            double currentArea = typeArea.getOrDefault(typeName, 0.0);
            typeArea.put(typeName, currentArea + shape.calculateArea());
        }
        
        // Calculate percentages
        Map<String, Double> percentageMap = new HashMap<>();
        for (Map.Entry<String, Double> entry : typeArea.entrySet()) {
            percentageMap.put(entry.getKey(), (entry.getValue() / totalArea) * 100);
        }
        
        return percentageMap;
    }
    
    // Calculate area percentage by color
    public Map<String, Double> calculateAreaPercentageByColor() {
        Map<String, Double> colorArea = new HashMap<>();
        double totalArea = calculateTotalArea();
        
        if (totalArea == 0) {
            return new HashMap<>();
        }
        
        // First calculate total area for each color
        for (Shape shape : shapes) {
            String color = shape.getColor().toLowerCase();
            double currentArea = colorArea.getOrDefault(color, 0.0);
            colorArea.put(color, currentArea + shape.calculateArea());
        }
        
        // Calculate percentages
        Map<String, Double> percentageMap = new HashMap<>();
        for (Map.Entry<String, Double> entry : colorArea.entrySet()) {
            percentageMap.put(entry.getKey(), (entry.getValue() / totalArea) * 100);
        }
        
        return percentageMap;
    }
    
    // Get the shape with the largest area
    public Shape getLargestShape() {
        if (shapes == null || shapes.isEmpty()) {
            return null;
        }
        
        Shape largest = shapes.get(0);
        for (Shape shape : shapes) {
            if (shape.calculateArea() > largest.calculateArea()) {
                largest = shape;
            }
        }
        
        return largest;
    }
    
    // Get the shape with the smallest area
    public Shape getSmallestShape() {
        if (shapes == null || shapes.isEmpty()) {
            return null;
        }
        
        Shape smallest = shapes.get(0);
        for (Shape shape : shapes) {
            if (shape.calculateArea() < smallest.calculateArea()) {
                smallest = shape;
            }
        }
        
        return smallest;
    }
    
    // Print all statistics
    public void printStatistics() {
        System.out.println("=== Shape Statistics ===");
        
        // Print type statistics
        System.out.println("\nShape count by type:");
        for (Map.Entry<String, Integer> entry : countShapesByType().entrySet()) {
            System.out.println("  " + entry.getKey() + ": " + entry.getValue());
        }
        
        // Print color statistics
        System.out.println("\nShape count by color:");
        for (Map.Entry<String, Integer> entry : countShapesByColor().entrySet()) {
            System.out.println("  " + entry.getKey() + ": " + entry.getValue());
        }
        
        // Print total area
        System.out.println("\nTotal area: " + calculateTotalArea());
        
        // Print area percentage by type
        System.out.println("\nArea percentage by type:");
        for (Map.Entry<String, Double> entry : calculateAreaPercentageByType().entrySet()) {
            System.out.printf("  %s: %.2f%%\n", entry.getKey(), entry.getValue());
        }
        
        // Print area percentage by color
        System.out.println("\nArea percentage by color:");
        for (Map.Entry<String, Double> entry : calculateAreaPercentageByColor().entrySet()) {
            System.out.printf("  %s: %.2f%%\n", entry.getKey(), entry.getValue());
        }
        
        // Print largest and smallest shapes
        Shape largest = getLargestShape();
        Shape smallest = getSmallestShape();
        
        if (largest != null) {
            System.out.println("\nLargest shape:");
            System.out.printf("  Type: %s, Color: %s, Area: %.2f\n", 
                              largest.getClass().getSimpleName(), 
                              largest.getColor(), 
                              largest.calculateArea());
        }
        
        if (smallest != null) {
            System.out.println("\nSmallest shape:");
            System.out.printf("  Type: %s, Color: %s, Area: %.2f\n", 
                              smallest.getClass().getSimpleName(), 
                              smallest.getColor(), 
                              smallest.calculateArea());
        }
    }
}