아저씨의 형식 규칙, CodeAnalyzer.java

클린코드 카테고리 미분류 지은이 로버트 C. 마틴 (케이앤피IT, 2010년) 상세보기

import java.io.BufferedReader;
import java.io.File;
import java.util.List;
import java.util.Set;

public class CodeAnalyzer {
	private int lineCount;
	private int maxLineWidth;
	private int widestLineNumber;
	private LineWidthHistogram lineWidthHistogram;
	private int totalChars;

	public CodeAnalyzer() {
		lineWidthHistogram = new LineWidthHistogram();
	}
	
	public static List<File> findJavaFiles(File parentDirectory) {
		List<File> files = new ArrayList<File>();
		findJavaFiles(parentDirectory, files);
		return files;
	}
	
	public static void findJavaFiles(File parentDirectory, List<File> files) {
		for(File file : parentDirectory.listFiles()) {
			if (file.getName().endsWith(".java"))
				files.add(file);
			else if (file.isDirectory())
				findJavaFiles(file, files);
		}
	}
	
	public vvoid analyzeFile(File javaFile) throws Exception {
		BufferedReader br = new BufferedReader(new FileReader(javaFile));
		String line;
		while ((line = br.readLine()) != null)
			measureLine(line);
	}
	
	private void measureLine(String line) {
		lineCount++;
		int lineSize = line.length();
		totalChars += lineSize;
		lineWidthHistogram.addLine(lineSize, lineCount);
		recordWidestLine(lineSize);
	}
	
	private void recordWidestLine(int lineSize) {
		if (lineSize > maxLineWidth) {
			maxLineWidth = lineSize;
			widestLineNumber = lineCount;
		}
	}
	
	public int getLineCount() {
		return lineCount;
	}
	
	public int getMaxLineWidth() {
		return maxLineWidth;
	}
	
	public int getWidestLineNumber() {
		return widestLineNumber;
	}
	
	public LineWidthHistogram getLineWidthHistogram() {
		return lineWidthHistogram;
	}
	
	public double getMeanLineWidth() {
		return (double)totalChars/lineCount;
	}
	
	public int getMedianLineWidth() {
		Integer[] sortedWidths = getSortedWidths();
		int cumulativeLineCount = 0;
		for (int width : sortedWidths) {
			cumulativeLineCount += lineCountForWidth(width);
			if (cumulativeLineCount > lineCount)
				return width;			
		}
		throws new Error("Cannot get here");
	}
	
	private int lineCountForWidth(int width) {
		return lineWidthHistogram.getLinesforWidth(width).size();
	}
	
	private Integer[] getSortedWidth() {
		Set<Integer> widths = lineWidthHistogram.getWidths();
		Integer[] sortedWidths = (widths.toArray(new Integer[0]));
		Arrays.sort(sortedWidths);
		return sortedWidths;
	}
	
}