package com.publiccms.common.tools;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.List;

import javax.imageio.ImageIO;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.cos.COSObject;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.springframework.web.multipart.MultipartFile;

import com.drew.imaging.ImageProcessingException;
import com.publiccms.common.constants.Constants;
import com.publiccms.logic.component.template.TemplateComponent;
import com.publiccms.views.pojo.entities.FileUploadResult;

/**
 *
 * CmsFileUtils 文件操作组件
 *
 */
public class CmsFileUtils {
    private CmsFileUtils() {
    }

    public static final String UPLOAD_PATH = "upload/";
    public static final String USER_PRIVATE_PATH = "user/";

    public static final String HEADERS_SEND_CTRL = "Sendfile";
    public static final String HEADERS_SEND_NGINX = "X-Accel-Redirect";
    public static final String HEADERS_SEND_APACHE = "X-Sendfile";
    public static final String NGINX_PRIVATEFILE_PREFIX = "/privatefile/";

    public static final String ORDERFIELD_FILENAME = "fileName";
    public static final String ORDERFIELD_FILESIZE = "fileSize";
    public static final String ORDERFIELD_CREATEDATE = "createDate";
    public static final String ORDERFIELD_MODIFIEDDATE = "modifiedDate";

    private static final FileInfoComparator FILENAME_COMPARATOR = new FileInfoComparator();
    private static final FileInfoComparator FILESIZE_COMPARATOR = new FileInfoComparator(ORDERFIELD_FILESIZE);
    private static final FileInfoComparator CREATEDATE_COMPARATOR = new FileInfoComparator(ORDERFIELD_CREATEDATE);
    private static final FileInfoComparator MODIFIEDDATE_COMPARATOR = new FileInfoComparator(ORDERFIELD_MODIFIEDDATE);
    /**
     * 
     */
    public static final List<String> IMAGE_FILE_SUFFIXS_LIST = Arrays.asList(".png", ".jpg", ".jpeg", ".gif", ".bmp", ".svg");

    /**
     * 
     */
    /**
     * 
     */
    public static final String[] AUDIO_FILE_SUFFIXS = new String[] { ".mp3", ".wav", ".mid" };

    /**
     * 
     */
    public static final String[] IMAGE_FILE_SUFFIXS = new String[] { ".png", ".jpg", ".jpeg", ".gif", ".svg", ".bmp" };
    /**
     * 
     */
    public static final String[] DOCUMENT_FILE_SUFFIXS = new String[] { ".doc", ".docx", ".xls", ".xlsx", ".ppt", ".pptx", ".pdf",
            ".txt", ".md", ".ofd" };
    /**
     * 
     */
    public static final String[] VIDEO_FILE_SUFFIXS = new String[] { ".flv", ".swf", ".mkv", ".avi", ".rm", ".rmvb", ".mpeg",
            ".mpg", ".ogg", ".ogv", ".mov", ".wmv", ".mp4", ".webm" };
    /**
     * 
     */
    public static final String[] OTHER_FILE_SUFFIXS = new String[] { ".rar", ".zip", ".tar", ".gz", ".7z", ".bz2", ".cab", ".iso",
            ".psd" };
    /**
     * 
     */
    public static final String[] ALLOW_FILES = ArrayUtils.addAll(
            ArrayUtils.addAll(ArrayUtils.addAll(ArrayUtils.addAll(AUDIO_FILE_SUFFIXS, VIDEO_FILE_SUFFIXS), IMAGE_FILE_SUFFIXS),
                    DOCUMENT_FILE_SUFFIXS),
            OTHER_FILE_SUFFIXS);
    /**
     * 
     */
    public static final String[] IMAGE_FILETYPES = new String[] { CmsFileUtils.FILE_TYPE_IMAGE };
    /**
     * 
     */
    public static final String[] OTHER_FILETYPES = new String[] { CmsFileUtils.FILE_TYPE_VIDEO, CmsFileUtils.FILE_TYPE_AUDIO,
            CmsFileUtils.FILE_TYPE_DOCUMENT, CmsFileUtils.FILE_TYPE_OTHER };

    /**
     * 
     */
    public static final String[] VIDEO_FILETYPES = new String[] { CmsFileUtils.FILE_TYPE_VIDEO };
    /**
     * 
     */
    public static final String FILE_TYPE_IMAGE = "image";
    /**
     * 
     */
    public static final String FILE_TYPE_VIDEO = "video";
    /**
     * 
     */
    public static final String FILE_TYPE_DOCUMENT = "document";
    /**
     * 
     */
    public static final String FILE_TYPE_AUDIO = "audio";
    /**
     * 
     */
    public static final String FILE_TYPE_OTHER = "other";
    /**
     * 
     */
    public static final String FILE_TYPE_PDF = "pdf";

    /**
     * 获取目录下文件列表 Get file list in directory ディレクトリ内のファイルリストを取得します
     *
     * @param dirPath
     * @param orderField
     * @return file info list
     */
    public static List<FileInfo> getFileList(String dirPath, String orderField) {
        return getFileList(dirPath, true, orderField);
    }

    /**
     * 获取目录下文件列表 Get file list in directory ディレクトリ内のファイルリストを取得します
     *
     * @param dirPath
     * @param parentPath
     * @param word
     * @return file result list
     */
    public static List<FileSearchResult> searchFileList(String dirPath, String parentPath, String word) {
        List<FileSearchResult> fileList = new ArrayList<>();
        if (CommonUtils.notEmpty(word)) {
            searchFileList(Paths.get(dirPath), parentPath, word, fileList);
        }
        return fileList;
    }

    /**
     * 获取目录下文件列表 Get file list in directory ディレクトリ内のファイルリストを取得します
     *
     * @param dirPath
     * @param fileList
     * @param word
     * @param replace
     */
    public static void replaceFileList(String dirPath, List<FileReplaceResult> fileList, String word, String replace) {
        if (CommonUtils.notEmpty(fileList)) {
            for (FileReplaceResult result : fileList) {
                if (CommonUtils.notEmpty(result.getPath()) && null != result.getIndexs()) {
                    File file = Paths.get(dirPath, CmsFileUtils.getSafeFileName(result.getPath())).toFile();
                    try {
                        List<String> list = FileUtils.readLines(file, StandardCharsets.UTF_8);
                        int i = 0;
                        int j = 0;
                        int n = 0;
                        for (String line : list) {
                            if (line.contains(word)) {
                                if (result.getIndexs().length > j && j == result.getIndexs()[n]) {
                                    list.set(i, line.replace(word, replace));
                                    n++;
                                }
                                j++;
                            }
                            i++;
                        }
                        FileUtils.writeLines(file, StandardCharsets.UTF_8.name(), list);
                    } catch (IOException e) {
                    }
                }
            }
        }
    }

    /**
     * 获取目录下文件列表 Get file list in directory ディレクトリ内のファイルリストを取得します
     *
     * @param dirPath
     * @param parentPath
     * @param word
     * @param fileList
     */
    private static void searchFileList(Path dirPath, String parentPath, String word, List<FileSearchResult> fileList) {
        try (DirectoryStream<Path> stream = Files.newDirectoryStream(dirPath)) {
            for (Path entry : stream) {
                Path fileNamePath = entry.getFileName();
                if (null != fileNamePath) {
                    String fileName = fileNamePath.toString();
                    if (!parentPath.endsWith(Constants.SEPARATOR)) {
                        parentPath = CommonUtils.joinString(parentPath, Constants.SEPARATOR);
                    }
                    File file = entry.toFile();
                    if (file.isDirectory()) {
                        if (!TemplateComponent.INCLUDE_DIRECTORY.equalsIgnoreCase(fileName)) {
                            searchFileList(entry, CommonUtils.joinString(parentPath, fileName), word, fileList);
                        }
                    } else if (!fileName.endsWith(".data")) {
                        List<String> matchList = new ArrayList<>();
                        List<String> list = FileUtils.readLines(entry.toFile(), StandardCharsets.UTF_8.name());
                        for (String line : list) {
                            if (line.contains(word)) {
                                matchList.add(line);
                            }
                        }
                        if (!matchList.isEmpty()) {
                            FileSearchResult result = new FileSearchResult();
                            result.setPath(CommonUtils.joinString(parentPath, fileName));
                            result.setMatchList(matchList);
                            fileList.add(result);
                        }
                    }
                }
            }
        } catch (IOException e) {
        }
    }

    /**
     * 获取目录下文件列表 Get file list in directory ディレクトリ内のファイルリストを取得します
     *
     * @param dirPath
     * @param useFilter
     * @param orderField
     * @return file info list
     */
    public static List<FileInfo> getFileList(String dirPath, boolean useFilter, String orderField) {
        List<FileInfo> fileList = new ArrayList<>();
        try (DirectoryStream<Path> stream = Files.newDirectoryStream(Paths.get(dirPath))) {
            for (Path entry : stream) {
                Path fileNamePath = entry.getFileName();
                if (null != fileNamePath) {
                    String fileName = fileNamePath.toString();
                    if (!useFilter
                            || !fileName.endsWith(".data") && !TemplateComponent.INCLUDE_DIRECTORY.equalsIgnoreCase(fileName)) {
                        BasicFileAttributes attrs = Files.readAttributes(entry, BasicFileAttributes.class);
                        fileList.add(new FileInfo(fileName, attrs.isDirectory(), attrs));
                    }
                }
            }
            if (null == orderField) {
                orderField = ORDERFIELD_FILENAME;
            }
            Comparator<FileInfo> comparator;
            switch (orderField) {
            case ORDERFIELD_MODIFIEDDATE:
                comparator = MODIFIEDDATE_COMPARATOR;
                break;
            case ORDERFIELD_CREATEDATE:
                comparator = CREATEDATE_COMPARATOR;
                break;
            case ORDERFIELD_FILESIZE:
                comparator = FILESIZE_COMPARATOR;
                break;
            default:
                comparator = FILENAME_COMPARATOR;
            }
            Collections.sort(fileList, comparator);
        } catch (IOException e) {
        }
        return fileList;
    }

    /**
     * 将字节数组写入文件 Write byte array to file バイト配列をファイルに書き込みます
     *
     * @param filepath
     * @param data
     * @throws IOException
     */
    public static void writeByteArrayToFile(String filepath, byte[] data) throws IOException {
        FileUtils.writeByteArrayToFile(new File(filepath), data);
    }

    /**
     * 获取文件大小 Get file size ファイルサイズを取得します
     *
     * @param filepath
     * @param filename
     * @param suffix
     * @return uploadResult
     */
    public static FileUploadResult getFileSize(String filepath, String filename, String suffix) {
        return getFileSize(new File(filepath), filename, suffix);
    }

    /**
     * 获取文件大小 Get file size ファイルサイズを取得します
     *
     * @param file
     * @param suffix
     * @return uploadResult
     */
    private static FileUploadResult getFileSize(File file, String filename, String suffix) {
        FileUploadResult uploadResult = new FileUploadResult();
        uploadResult.setFileSize(file.length());
        uploadResult.setFilename(filename);

        if (null != suffix && !suffix.startsWith(Constants.DOT)) {
            suffix = CommonUtils.joinString(Constants.DOT, suffix);
        }
        if (ArrayUtils.contains(IMAGE_FILE_SUFFIXS, suffix)) {
            try {
                int angle = ImageUtils.getAngle(file);
                try (FileInputStream fis = new FileInputStream(file)) {
                    BufferedImage bufferedImg = ImageIO.read(fis);
                    if (null != bufferedImg) {
                        uploadResult.setImage(true);
                        if (90 == angle || 270 == angle) {
                            uploadResult.setWidth(bufferedImg.getHeight());
                            uploadResult.setHeight(bufferedImg.getWidth());
                        } else {
                            uploadResult.setWidth(bufferedImg.getWidth());
                            uploadResult.setHeight(bufferedImg.getHeight());
                        }
                    }
                }
            } catch (IOException | ImageProcessingException e) {
            }
        }
        return uploadResult;
    }

    /**
     * 将输入流复制到文件 Copy input stream to file 入力ストリームをファイルにコピーします
     *
     * @param source
     * @param destination
     * @throws IOException
     */
    public static void copyInputStreamToFile(InputStream source, String destination) throws IOException {
        File dest = new File(destination);
        FileUtils.copyInputStreamToFile(source, dest);
    }

    /**
     * 将文件复制到文件 Copy file to file ファイルをファイルにコピーします
     *
     * @param source
     * @param destination
     * @throws IOException
     */
    public static void copyFileToFile(String source, String destination) throws IOException {
        FileUtils.copyFile(new File(source), new File(destination));
    }

    /**
     * 将文件复制到输出流 Copy file to output stream ファイルを出力ストリームにコピーします
     *
     * @param filepath
     * @param outputStream
     * @throws IOException
     */
    public static void copyFileToOutputStream(String filepath, OutputStream outputStream) throws IOException {
        try (InputStream inputStream = new FileInputStream(filepath)) {
            IOUtils.copy(inputStream, outputStream);
        }
    }

    /**
     * 创建目录 Create directory ディレクトリを作成します
     *
     * @param filepath
     */
    public static void mkdirs(String filepath) {
        File file = new File(filepath);
        file.mkdirs();
    }

    /**
     * 创建父目录 Create parent directory 親ディレクトリを作成します
     *
     * @param filepath
     */
    public static void mkdirsParent(String filepath) {
        File file = new File(filepath);
        file.getParentFile().mkdirs();
    }

    /**
     * 判断是否为目录 Check if it is a directory ディレクトリであるかどうかを確認します
     *
     * @param filepath
     * @return
     */
    public static boolean isDirectory(String filepath) {
        File file = new File(filepath);
        return CommonUtils.notEmpty(file) && file.isDirectory();
    }

    /**
     * 判断是否为文件 Check if it is a file ファイルであるかどうかを確認します
     *
     * @param filepath
     * @return
     */
    public static boolean isFile(String filepath) {
        File file = new File(filepath);
        return CommonUtils.notEmpty(file) && file.isFile();
    }

    /**
     * 判断文件是否存在 Check if file exists ファイルが存在するかどうかを確認します
     *
     * @param filepath
     * @return
     */
    public static boolean exists(String filepath) {
        return CommonUtils.notEmpty(new File(filepath));
    }

    /**
     * 写入文件 Write to file ファイルに書き込みます
     *
     * @param filepath
     * @param content
     * @return whether to create successfully
     * @throws IOException
     */
    public static boolean createFile(String filepath, String content) throws IOException {
        File file = new File(filepath);
        if (CommonUtils.empty(file)) {
            FileUtils.writeStringToFile(file, content, StandardCharsets.UTF_8.name());
            return true;
        }
        return false;
    }

    /**
     * 移动文件或目录 Move file or directory ファイルまたはディレクトリを移動します
     *
     * @param filepath
     * @param backupFilePath
     * @return whether to move successfully
     */
    public static boolean moveFile(String filepath, String backupFilePath) {
        File file = new File(filepath);
        if (CommonUtils.notEmpty(file)) {
            File backupFile = new File(backupFilePath);
            try {
                if (file.isDirectory()) {
                    if (backupFile.exists()) {
                        FileUtils.copyDirectory(file, backupFile);
                        FileUtils.deleteQuietly(file);
                    } else {
                        FileUtils.moveDirectory(file, backupFile);
                    }
                } else {
                    if (backupFile.exists()) {
                        FileUtils.deleteQuietly(backupFile);
                    }
                    FileUtils.moveFile(file, backupFile);
                }
                return true;
            } catch (IOException e) {
            }
        }
        return false;
    }

    /**
     * 获取安全的文件名 Get safe file name セーフなファイル名を取得します
     *
     * @param path
     * @return safe file path
     */
    public static String getSafeFileName(String path) {
        if (CommonUtils.notEmpty(path) && path.contains("..")) {
            return path.replace("..", Constants.BLANK);
        } else {
            return path;
        }
    }

    /**
     * 删除文件或目录 Delete file or directory ファイルまたはディレクトリを削除します
     *
     * @param filepath
     * @return whether to move successfully
     */
    public static boolean delete(String filepath) {
        File file = new File(filepath);
        if (CommonUtils.notEmpty(file)) {
            FileUtils.deleteQuietly(file);
            return true;
        }
        return false;
    }

    /**
     * 修改文件内容 Update file content ファイルの内容を更新します
     * 
     * @param filepath
     * @param historyFilePath
     * @param content
     * @return whether to modify successfully
     * @throws IOException
     */
    public static boolean updateFile(String filepath, String historyFilePath, String content) throws IOException {
        File file = new File(filepath);
        if (CommonUtils.notEmpty(file) && null != content) {
            File history = new File(historyFilePath);
            if (null != history.getParentFile()) {
                history.getParentFile().mkdirs();
            }
            FileUtils.copyFile(file, history);
            try (FileOutputStream outputStream = new FileOutputStream(file)) {
                outputStream.write(content.getBytes(StandardCharsets.UTF_8));
            }
            return true;
        }
        return false;
    }

    /**
     * 判断文件是否安全 Check if file is safe ファイルが安全であるかどうかを確認します
     *
     * @param filepath
     * @param suffix
     * @return is safe
     */
    public static boolean isSafe(String filepath, String suffix) {
        File file = new File(filepath);
        if (CommonUtils.notEmpty(suffix) && file.isFile()) {
            if (suffix.endsWith(ImageUtils.FORMAT_NAME_SVG)) {
                try {
                    return ImageUtils.svgSafe(file);
                } catch (IOException e) {
                    return false;
                }
            } else if (suffix.endsWith(FILE_TYPE_PDF)) {
                try (PDDocument document = PDDocument.load(file)) {
                    return isSafe(document.getDocument().getObjects());
                } catch (IOException e) {
                    return false;
                }
            }
        }
        return true;
    }

    private static boolean isSafe(List<COSObject> pdfObjects) {
        for (COSObject object : pdfObjects) {
            if (isUnSafe(object)) {
                return false;
            }
        }
        return true;
    }

    private static boolean isUnSafe(Collection<COSBase> pdfObjects) {
        for (COSBase object : pdfObjects) {
            if (isUnSafe(object)) {
                return true;
            }
        }
        return false;
    }

    private static boolean isUnSafe(COSObject object) {
        return isUnSafe(object.getObject());
    }

    private static boolean isUnSafe(COSBase realObject) {
        if (realObject instanceof COSDictionary) {
            COSDictionary dic = (COSDictionary) realObject;
            if (null != dic.getDictionaryObject(COSName.JS) || null != dic.getDictionaryObject(COSName.JAVA_SCRIPT)) {
                return true;
            }
            return isUnSafe(dic.getValues());
        } else if (realObject instanceof COSArray) {
            COSArray array = (COSArray) realObject;
            for (COSBase object : array) {
                if (isUnSafe(object)) {
                    return true;
                }
            }
        } else if (realObject instanceof COSName && (COSName.JS.equals(realObject) || COSName.JAVA_SCRIPT.equals(realObject))) {
            return false;
        }
        return false;
    }

    /**
     * 获取文件内容 Get file content ファイルの内容を取得します
     *
     * @param filepath
     * @param suffix
     * @return file content
     */
    public static String getFileContent(String filepath) {
        File file = new File(filepath);
        try {
            if (file.isFile()) {
                return FileUtils.readFileToString(file, StandardCharsets.UTF_8.name());
            }
        } catch (IOException e) {
            return null;
        }
        return null;
    }

    /**
     * 获取上传文件名 Get upload file name アップロードファイル名を取得します
     *
     * @param suffix
     * @return upload file name
     */
    public static String getUploadFileName(String suffix) {
        StringBuilder sb = new StringBuilder(UPLOAD_PATH);
        sb.append(DateFormatUtils.getDateFormat(DateFormatUtils.UPLOAD_FILE_NAME_FORMAT_STRING).format(CommonUtils.getDate()));
        sb.append(Constants.random.nextInt());
        if (!suffix.contains(Constants.DOT)) {
            sb.append(Constants.DOT);
        }
        sb.append(suffix);
        return sb.toString();
    }

    /**
     * 获取私有文件签名字符串 Get private file sign string 私有ファイルの署名文字列を取得します
     * 
     * @param expiry
     * @param filepath
     * @return avatar file name
     */
    public static String getPrivateFileSignString(long expiry, String filepath) {
        return CommonUtils.joinString("expiry=", expiry, "&filePath=", filepath);
    }

    /**
     * 获取用户私有文件名 Get user private file name ユーザーのプライベートファイル名を取得します
     * 
     * @param userId
     * @param filepath
     * @return user private file name
     */
    public static String getUserPrivateFileName(long userId, String filepath) {
        return CommonUtils.joinString(USER_PRIVATE_PATH, userId, Constants.SEPARATOR, filepath);
    }

    /**
     * 获取文件名 Get file name ファイル名を取得します
     *
     * @param filePath
     * @return suffix
     */
    public static String getFileName(String filePath) {
        if (null != filePath) {
            int index = filePath.lastIndexOf(Constants.SEPARATOR);
            if (-1 < index) {
                return filePath.substring(filePath.lastIndexOf(Constants.SEPARATOR) + 1, filePath.length());
            }
        }
        return null;
    }

    /**
     * 获取文件后缀 Get file suffix ファイルのサフィックスを取得します
     *
     * @param originalFilename
     * @return suffix
     */
    public static String getSuffix(String originalFilename) {
        if (null != originalFilename) {
            int index = originalFilename.lastIndexOf(Constants.DOT);
            if (-1 < index) {
                return originalFilename.substring(originalFilename.lastIndexOf(Constants.DOT), originalFilename.length())
                        .toLowerCase();
            }
        }
        return null;
    }

    /**
     * 获取文件类型 Get file type ファイルタイプを取得します
     *
     * @param suffix
     * @return file type
     */
    public static String getFileType(String suffix) {
        if (null != suffix && !suffix.startsWith(Constants.DOT)) {
            suffix = CommonUtils.joinString(Constants.DOT, suffix);
        }
        if (ArrayUtils.contains(IMAGE_FILE_SUFFIXS, suffix)) {
            return FILE_TYPE_IMAGE;
        } else if (ArrayUtils.contains(VIDEO_FILE_SUFFIXS, suffix)) {
            return FILE_TYPE_VIDEO;
        } else if (ArrayUtils.contains(AUDIO_FILE_SUFFIXS, suffix)) {
            return FILE_TYPE_AUDIO;
        } else if (ArrayUtils.contains(DOCUMENT_FILE_SUFFIXS, suffix)) {
            return FILE_TYPE_DOCUMENT;
        } else {
            return FILE_TYPE_OTHER;
        }
    }

    /**
     * 上传文件 Upload file ファイルをアップロードします
     *
     * @param data
     * @param fileName
     * @return file name
     * @throws IllegalStateException
     * @throws IOException
     */
    public static String upload(byte[] data, String fileName) throws IllegalStateException, IOException {
        return upload(data, fileName, null, null);
    }

    /**
     * 上传文件 Upload file ファイルをアップロードします
     *
     * @param data
     * @param fileName
     * @param originalName
     * @param metadataPath
     * @return file name
     * @throws IllegalStateException
     * @throws IOException
     */
    public static String upload(byte[] data, String fileName, String originalName, String metadataPath)
            throws IllegalStateException, IOException {
        File dest = new File(fileName);
        dest.getParentFile().mkdirs();
        FileUtils.writeByteArrayToFile(dest, data);
        if (CommonUtils.notEmpty(originalName) && CommonUtils.notEmpty(metadataPath)) {
            try {
                FileUtils.writeStringToFile(new File(metadataPath), originalName, StandardCharsets.UTF_8.name());
            } catch (IOException e) {
            }
        }
        return dest.getName();
    }

    /**
     * 上传文件 Upload file ファイルをアップロードします
     *
     * @param file
     * @param fileName
     * @return file name
     * @throws IOException
     */
    public static Path upload(MultipartFile file, String fileName) throws IOException {
        File dest = new File(fileName);
        dest.getParentFile().mkdirs();
        file.transferTo(dest);
        return dest.toPath();
    }

    public static class FileInfoComparator implements Comparator<FileInfo> {
        private String mode = ORDERFIELD_FILENAME;

        public FileInfoComparator() {
        }

        public FileInfoComparator(String mode) {
            if (null != mode) {
                this.mode = mode;
            }
        }

        @Override
        public int compare(FileInfo o1, FileInfo o2) {
            if (o1.isDirectory() && !o2.isDirectory()) {
                return -1;
            } else if (!o1.isDirectory() && o2.isDirectory()) {
                return 1;
            } else {
                int result = 0;
                switch (mode) {
                case ORDERFIELD_MODIFIEDDATE:
                    result = o2.getLastModifiedTime().compareTo(o1.getLastModifiedTime());
                    break;
                case ORDERFIELD_CREATEDATE:
                    result = o2.getCreationTime().compareTo(o1.getCreationTime());
                    break;
                case ORDERFIELD_FILESIZE:
                    result = Long.compare(o2.getSize(), o1.getSize());
                    break;
                default:
                    result = o1.getFileName().toLowerCase().compareTo(o2.getFileName().toLowerCase());
                }
                return result;
            }
        }

    }

    /**
     * FileSearchResult 文件查找结果
     * 
     */
    public static class FileReplaceResult {
        private String path;
        private int[] indexs;

        /**
         * @return the path
         */
        public String getPath() {
            return path;
        }

        /**
         * @param path
         *            the path to set
         */
        public void setPath(String path) {
            this.path = path;
        }

        /**
         * @return the indexs
         */
        public int[] getIndexs() {
            return indexs;
        }

        /**
         * @param indexs
         *            the indexs to set
         */
        public void setIndexs(int[] indexs) {
            this.indexs = indexs;
        }

        @Override
        public String toString() {
            return CommonUtils.joinString("FileReplaceResult [path=", path, ", indexs=", Arrays.toString(indexs), "]");
        }
    }

    /**
     * FileSearchResult 文件查找結果
     * 
     */
    public static class FileSearchResult {
        private String path;
        private List<String> matchList;

        /**
         * @return the path
         */
        public String getPath() {
            return path;
        }

        /**
         * @param path
         *            the path to set
         */
        public void setPath(String path) {
            this.path = path;
        }

        /**
         * @return the matchList
         */
        public List<String> getMatchList() {
            return matchList;
        }

        /**
         * @param matchList
         *            the matchList to set
         */
        public void setMatchList(List<String> matchList) {
            this.matchList = matchList;
        }

        @Override
        public String toString() {
            return CommonUtils.joinString("FileSearchResult [path=", path, ", matchList=", matchList, "]");
        }
    }

    /**
     *
     * FileInfo ファイル情報封装クラス
     *
     */
    public static class FileInfo {
        private String fileName;
        private boolean directory;
        private Date lastModifiedTime;
        private Date lastAccessTime;
        private Date creationTime;
        private long size;

        /**
         * @param fileName
         * @param directory
         * @param attrs
         */
        public FileInfo(String fileName, boolean directory, BasicFileAttributes attrs) {
            this.fileName = fileName;
            this.directory = directory;
            this.lastModifiedTime = new Date(attrs.lastModifiedTime().toMillis());
            this.lastAccessTime = new Date(attrs.lastAccessTime().toMillis());
            this.creationTime = new Date(attrs.creationTime().toMillis());
            this.size = attrs.size();
        }

        /**
         * @return file name
         */
        public String getFileName() {
            return fileName;
        }

        /**
         * @param fileName
         */
        public void setFileName(String fileName) {
            this.fileName = fileName;
        }

        /**
         * @return directory
         */
        public boolean isDirectory() {
            return directory;
        }

        /**
         * @param directory
         */
        public void setDirectory(boolean directory) {
            this.directory = directory;
        }

        /**
         * @return last modified time
         */
        public Date getLastModifiedTime() {
            return lastModifiedTime;
        }

        /**
         * @param lastModifiedTime
         */
        public void setLastModifiedTime(Date lastModifiedTime) {
            this.lastModifiedTime = lastModifiedTime;
        }

        /**
         * @return last access time
         */
        public Date getLastAccessTime() {
            return lastAccessTime;
        }

        /**
         * @param lastAccessTime
         */
        public void setLastAccessTime(Date lastAccessTime) {
            this.lastAccessTime = lastAccessTime;
        }

        /**
         * @return creation time
         */
        public Date getCreationTime() {
            return creationTime;
        }

        /**
         * @param creationTime
         */
        public void setCreationTime(Date creationTime) {
            this.creationTime = creationTime;
        }

        /**
         * @return size
         */
        public long getSize() {
            return size;
        }

        /**
         * @param size
         */
        public void setSize(long size) {
            this.size = size;
        }
    }
}
