com.germinus.easyconf.FileUtil.java Source code

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Here is the source code for com.germinus.easyconf.FileUtil.java

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/*
 * Copyright 2004-2005 Germinus XXI, Liferay LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License")
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * This is a derived work from source code taken from Liferay.
 */
package com.germinus.easyconf;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Reader;

import java.nio.channels.FileChannel;

import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.Properties;
import java.util.jar.JarEntry;
import java.util.jar.JarOutputStream;

import org.apache.commons.lang.StringUtils;

/**
 * File utility methods
 * @author  Brian Wing Shun Chan, Jorge Ferrer
 *
 */
public class FileUtil {

    public static void copyDirectory(String sourceDirName, String destinationDirName) {

        copyDirectory(new File(sourceDirName), new File(destinationDirName));
    }

    public static void copyDirectory(File source, File destination) {
        if (source.exists() && source.isDirectory()) {
            if (!destination.exists()) {
                destination.mkdirs();
            }

            File[] fileArray = source.listFiles();

            for (int i = 0; i < fileArray.length; i++) {
                if (fileArray[i].isDirectory()) {
                    copyDirectory(fileArray[i],
                            new File(destination.getPath() + File.separator + fileArray[i].getName()));
                } else {
                    copyFile(fileArray[i],
                            new File(destination.getPath() + File.separator + fileArray[i].getName()));
                }
            }
        }
    }

    public static void copyFile(String sourceFileName, String destinationFileName) {

        copyFile(new File(sourceFileName), new File(destinationFileName));
    }

    public static void copyFile(File source, File destination) {
        if (!source.exists()) {
            return;
        }

        if ((destination.getParentFile() != null) && (!destination.getParentFile().exists())) {

            destination.getParentFile().mkdirs();
        }

        try {
            FileChannel srcChannel = new FileInputStream(source).getChannel();
            FileChannel dstChannel = new FileOutputStream(destination).getChannel();

            dstChannel.transferFrom(srcChannel, 0, srcChannel.size());

            srcChannel.close();
            dstChannel.close();
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
    }

    public static void copyFileLazy(String source, String destination) throws IOException {

        String oldContent = null;
        try {
            oldContent = FileUtil.read(source);
        } catch (FileNotFoundException fnfe) {
            return;
        }

        String newContent = null;
        try {
            newContent = FileUtil.read(destination);
        } catch (FileNotFoundException fnfe) {
        }

        if (oldContent == null || !oldContent.equals(newContent)) {
            FileUtil.copyFile(source, destination);
        }
    }

    public static void deltree(String directory) {
        deltree(new File(directory));
    }

    public static void deltree(File directory) {
        if (directory.exists() && directory.isDirectory()) {
            File[] fileArray = directory.listFiles();

            for (int i = 0; i < fileArray.length; i++) {
                if (fileArray[i].isDirectory()) {
                    deltree(fileArray[i]);
                } else {
                    fileArray[i].delete();
                }
            }

            directory.delete();
        }
    }

    public static byte[] getBytes(File file) throws IOException {
        if (file == null || !file.exists()) {
            return null;
        }

        ByteArrayOutputStream out = new ByteArrayOutputStream();
        FileInputStream in = new FileInputStream(file);

        int c = in.read();

        while (c != -1) {
            out.write(c);
            c = in.read();
        }

        in.close();
        out.close();

        return out.toByteArray();
    }

    public static String getPath(String fullFileName) {
        int pos = fullFileName.lastIndexOf("/");

        if (pos == -1) {
            pos = fullFileName.lastIndexOf("\\");
        }

        String shortFileName = fullFileName.substring(0, pos);

        if (StringUtils.isEmpty(shortFileName)) {
            return "/";
        }

        return shortFileName;
    }

    public static String getShortFileName(String fullFileName) {
        int pos = fullFileName.lastIndexOf("/");

        if (pos == -1) {
            pos = fullFileName.lastIndexOf("\\");
        }

        String shortFileName = fullFileName.substring(pos + 1, fullFileName.length());

        return shortFileName;
    }

    public static boolean exists(String fileName) {
        File file = new File(fileName);

        return file.exists();
    }

    public static String[] listDirs(String fileName) throws IOException {
        return listDirs(new File(fileName));
    }

    public static String[] listDirs(File file) throws IOException {
        List dirs = new ArrayList();

        File[] fileArray = file.listFiles();

        for (int i = 0; i < fileArray.length; i++) {
            if (fileArray[i].isDirectory()) {
                dirs.add(fileArray[i].getName());
            }
        }

        return (String[]) dirs.toArray(new String[0]);
    }

    public static String[] listFiles(String fileName) throws IOException {
        return listFiles(new File(fileName));
    }

    public static String[] listFiles(File file) throws IOException {
        List files = new ArrayList();

        File[] fileArray = file.listFiles();

        for (int i = 0; i < fileArray.length; i++) {
            if (fileArray[i].isFile()) {
                files.add(fileArray[i].getName());
            }
        }

        return (String[]) files.toArray(new String[0]);
    }

    public static void mkdirs(String pathName) {
        File file = new File(pathName);
        file.mkdirs();
    }

    public static boolean move(String sourceFileName, String destinationFileName) {

        return move(new File(sourceFileName), new File(destinationFileName));
    }

    public static boolean move(File source, File destination) {
        if (!source.exists()) {
            return false;
        }

        destination.delete();

        return source.renameTo(destination);
    }

    public static String read(String fileName) throws IOException {
        return read(new File(fileName));
    }

    public static String read(File file) throws IOException {
        BufferedReader br = new BufferedReader(new FileReader(file));

        StringBuffer sb = new StringBuffer();
        String line = null;

        while ((line = br.readLine()) != null) {
            sb.append(line).append('\n');
        }

        br.close();

        return sb.toString().trim();
    }

    public static String replaceSeparator(String fileName) {
        return StringUtils.replace(fileName, "\\", "/");
    }

    public static List toList(Reader reader) {
        List list = new ArrayList();

        try {
            BufferedReader br = new BufferedReader(reader);

            StringBuffer sb = new StringBuffer();
            String line = null;

            while ((line = br.readLine()) != null) {
                list.add(line);
            }

            br.close();
        } catch (IOException ioe) {
        }

        return list;
    }

    public static List toList(String fileName) {
        try {
            return toList(new FileReader(fileName));
        } catch (IOException ioe) {
            return new ArrayList();
        }
    }

    public static Properties toProperties(FileInputStream fis) {
        Properties props = new Properties();

        try {
            props.load(fis);
        } catch (IOException ioe) {
        }

        return props;
    }

    public static Properties toProperties(String fileName) {
        try {
            return toProperties(new FileInputStream(fileName));
        } catch (IOException ioe) {
            return new Properties();
        }
    }

    public static void write(File file, String s) throws IOException {
        if (file.getParent() != null) {
            mkdirs(file.getParent());
        }

        BufferedWriter bw = new BufferedWriter(new FileWriter(file));

        bw.flush();
        bw.write(s);
        bw.flush();

        bw.close();
    }

    public static void write(String fileName, String s) throws IOException {
        write(new File(fileName), s);
    }

    public static void write(String pathName, String fileName, String s) throws IOException {

        write(new File(pathName, fileName), s);
    }

    public static void write(File dest, Properties props) throws IOException {
        write(dest, propertiesToString(props));
    }

    public static String propertiesToString(Properties p) {
        StringBuffer sb = new StringBuffer();

        Enumeration enu = p.propertyNames();

        while (enu.hasMoreElements()) {
            String key = (String) enu.nextElement();

            sb.append(key);
            sb.append("=");
            sb.append(p.getProperty(key));
            sb.append("\n");
        }

        return sb.toString();
    }

    public static void writeAsJAR(File dest, String propsFileName, Properties props)
            throws FileNotFoundException, IOException {
        JarOutputStream out = new JarOutputStream(new FileOutputStream(dest));
        JarEntry propertiesFile = new JarEntry(propsFileName);
        propertiesFile.setExtra(propertiesToString(props).getBytes());
        out.putNextEntry(propertiesFile);
        out.close();
    }

}