FilePathFormatter.java

package util;

import java.io.File;


/**
 * This is a class that can switch between absolute and relative file paths,
 * and convert a filepath to a fully qualified java class name,
 * which can be used for reflection
 * 
 * @author Will Nance
 * 
 */
public class FilePathFormatter {
    public static final String SOURCE = "src";
    private String projectDir = System.getProperty("user.dir");

    public FilePathFormatter () {
    }

    public String relativeToAbsolute (String relativePath) {
        // this should be someone else's problem. deal with your own null pointer exceptions
        if (relativePath == null) return null;
        return projectDir + SOURCE + relativePath;
    }

    public String absoluteToRelative (String absolutePath) {
        if (absolutePath == null) return null;
        return makePathRelativeToSrc(absolutePath);
    }

    public String formatClassFilePath (String path) {
        if (path == null || path.equals("")) return null;
        return replaceFileSeparatorWithDots(makePathRelativeToSrc(removeFileExtension(path)));
    }

    private String removeFileExtension (String filepath) {
        System.out.println("this is the filepath" + filepath);
        System.out.println(filepath.indexOf('.'));
            return filepath.substring(0, filepath.indexOf("."));
    }

    private String makePathRelativeToSrc (String path) {
        while (path.contains(SOURCE)) {
            path = path.substring(path.indexOf(SOURCE) + SOURCE.length() + 1, path.length());
        }
        return path;
    }

    private String replaceFileSeparatorWithDots (String path) {
        char[] letters = path.toCharArray();
        String ret = "";
        for (int i = 0; i < letters.length; i++) {
            char c = letters[i];
            if (c == File.separatorChar) {
                letters[i] = '.';
            }
            ret += letters[i];
        }
        return ret;
    }

}