src/dochelper/util/FileUtils.java

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/*
 * FileUtils.java
 *
 * Created on November 12, 2008, 4:42 PM
 *
 * Copyright 2009 Online Nederland Breedband B.V.
 * See the COPYRIGHT file for redistribution and use restrictions.
 * Authors: Guillermo Christen <guillermo.christen@is.online.nl>
 */
package dochelper.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Stack;

public class FileUtils {

    public FileUtils() {
    }

    public static String globToRE(String glob) {
        final Object NEG = new Object();
        final Object GROUP = new Object();
        Stack<Object> state = new Stack<Object>();

        StringBuffer buf = new StringBuffer();
        boolean backslash = false;

        for (int i = 0;i < glob.length();i++) {
            char c = glob.charAt(i);
            if (backslash) {
                buf.append('\\');
                buf.append(c);
                backslash = false;
                continue;
            }

            switch (c) {
                case '\\':
                    backslash = true;
                    break;
                case '?':
                    buf.append('.');
                    break;
                case '.':
                case '+':
                case '(':
                case ')':
                    buf.append('\\');
                    buf.append(c);
                    break;
                case '*':
                    buf.append(".*");
                    break;
                case '|':
                    if (backslash)
                        buf.append("\\|");
                    else
                        buf.append('|');
                    break;
                case '{':
                    buf.append('(');
                    if (i + 1 != glob.length() && glob.charAt(i + 1) == '!') {
                        buf.append('?');
                        state.push(NEG);
                    }
                    else
                        state.push(GROUP);
                    break;
                case ',':
                    if (!state.isEmpty() && state.peek() == GROUP)
                        buf.append('|');
                    else
                        buf.append(',');
                    break;
                case '}':
                    if (!state.isEmpty()) {
                        buf.append(")");
                        if (state.pop() == NEG)
                            buf.append(".*");
                    }
                    else
                        buf.append('}');
                    break;
                default:
                    buf.append(c);
            }
        }

        return buf.toString();
    }

    public static File[] _listDirectory(String path) {

        File directory = new File(path);
        File[] list = directory.listFiles();
        if (list == null) {
            System.err.println("Error in listDirectory(3 param)");
            return null;
        }

        return list;
    }

    public static String FileToString(File file) throws FileNotFoundException, IOException {

        String fileStr = "";

        //Lazy read
        FileInputStream fis = new FileInputStream(file);
        BufferedReader d = new BufferedReader(new InputStreamReader(fis));
        String record = null;

        while ((record = d.readLine()) != null) {
            fileStr += record + "\n";
        }

        return fileStr;
    }
}

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