Java Path File Name nio toClassName(String path)

Description

to Class Name

License

Open Source License

Declaration

public static String toClassName(String path) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;

public class Main {
    public static String toClassName(String path) {
        StringBuilder sb = new StringBuilder();
        sb.append(normalize(path).replace('-', '_').replace('.', '_').replace('/', '.'));
        return sb.toString();
    }//from w  w w  .ja v a2 s  . c om

    public static String normalize(String path) {
        if (path.contains(".")) {
            StringBuilder sb = new StringBuilder(path.length());
            for (String segment : path.split("/")) {
                if (segment.isEmpty() || segment.equals(".")) {
                    // skip
                } else if (segment.equals("..")) {
                    int sep = sb.lastIndexOf("/");
                    if (sep != -1) {
                        sb.setLength(sep);
                    } else {
                        return null;
                    }
                } else {
                    if (sb.length() > 0) {
                        sb.append("/");
                    }
                    sb.append(segment);
                }
            }
            path = sb.toString();
        }
        return path;
    }

    public static String normalize(String path, String subpath) {
        String result;
        if (path.isEmpty() || subpath.startsWith("/")) {
            result = subpath;
        } else if (path.endsWith("/")) {
            result = path + subpath;
        } else {
            result = path + "/" + subpath;
        }
        return normalize(result);
    }

    public static String toString(InputStream in) throws IOException {
        StringBuilder sb = new StringBuilder(1000);
        try (BufferedReader reader = new BufferedReader(new InputStreamReader(in, StandardCharsets.UTF_8))) {
            int n;
            while ((n = reader.read()) != -1) {
                sb.append((char) n);
            }
        }
        return sb.toString();
    }
}

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