Example usage for java.io File length

List of usage examples for java.io File length

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Introduction

In this page you can find the example usage for java.io File length.

Prototype

public long length()

Source Link

Document

Returns the length of the file denoted by this abstract pathname.

Usage

From source file:Main.java

public static int checkFileStatus(String dirPath, String fileName, String suffix) {
    int fileStatus;
    String filePath = checkFilePath(dirPath, fileName, suffix);

    if (filePath == null) {
        return fileStatus = FILE_ERROR;
    }//from  w  ww.  j a v a 2  s  . co m

    try {
        File dirFile = new File(dirPath);
        if (!dirFile.exists()) {
            dirFile.mkdirs();
        }
        File mFile = new File(filePath);
        if (!mFile.exists()) {
            fileStatus = FILE_CREATE;
            mFile.createNewFile();
        } else {
            long size = mFile.length();
            if (size > 0) {
                fileStatus = FILE_EXISTS;
            } else {

                fileStatus = FILE_EXISTS_NULL;
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
        return FILE_ERROR;
    }
    return fileStatus;

}

From source file:jease.site.Streams.java

/**
 * Write given file to response./*from   w  ww.  ja va 2 s  .c o m*/
 * 
 * If the given content type denotes a browser supported image, the image
 * will be automatically scaled if either "scale" is present as request
 * paramter or JEASE_IMAGE_LIMIT is set in Registry.
 */
public static void write(HttpServletRequest request, HttpServletResponse response, File file,
        String contentType) throws IOException {
    if (Images.isBrowserCompatible(contentType)) {
        int scale = NumberUtils.toInt(request.getParameter("scale"));
        if (scale > 0) {
            java.io.File scaledImage = Images.scale(file, scale);
            scaledImage.deleteOnExit();
            response.setContentType(contentType);
            response.setContentLength((int) scaledImage.length());
            Files.copy(scaledImage.toPath(), response.getOutputStream());
            return;
        }
        int limit = NumberUtils.toInt(Registry.getParameter(Names.JEASE_IMAGE_LIMIT));
        if (limit > 0) {
            java.io.File scaledImage = Images.limit(file, limit);
            scaledImage.deleteOnExit();
            response.setContentType(contentType);
            response.setContentLength((int) scaledImage.length());
            Files.copy(scaledImage.toPath(), response.getOutputStream());
            return;
        }

    }
    response.setContentType(contentType);
    response.setContentLength((int) file.length());
    Files.copy(file.toPath(), response.getOutputStream());
}

From source file:org.openmrs.module.omodexport.util.OmodExportUtil.java

/**
 * Utility method for exporting a single module
 * /* w  w w.ja  va 2s .  com*/
 * @param module -The module to export
 * @param response
 */
public static void exportSingleModule(Module module, HttpServletResponse response) {
    File file = module.getFile();
    response.setContentLength(new Long(file.length()).intValue());
    response.setContentType("application/zip");
    response.setHeader("Content-Disposition", "attachment; filename=\"" + file.getName() + "\"");
    try {
        FileCopyUtils.copy(new FileInputStream(file), response.getOutputStream());
    } catch (IOException e) {
        e.printStackTrace();
    }

}

From source file:ca.rmen.android.networkmonitor.app.email.Emailer.java

/**
 * Append the given attachments to the message which is being written by the given writer.
 *
 * @param boundary separates each file attachment
 *//*w  w w  .ja  va2 s  .  com*/
private static void appendAttachments(Writer writer, String boundary, Collection<File> attachments)
        throws IOException {
    for (File attachment : attachments) {
        ByteArrayOutputStream fileOs = new ByteArrayOutputStream((int) attachment.length());
        FileInputStream fileIs = new FileInputStream(attachment);
        try {
            IoUtil.copy(fileIs, fileOs);
        } finally {
            IoUtil.closeSilently(fileIs, fileOs);
        }
        final String mimeType = attachment.getName().substring(attachment.getName().indexOf(".") + 1);
        writer.write("--" + boundary + "\n");
        writer.write("Content-Type: application/" + mimeType + "; name=\"" + attachment.getName() + "\"\n");
        writer.write("Content-Disposition: attachment; filename=\"" + attachment.getName() + "\"\n");
        writer.write("Content-Transfer-Encoding: base64\n\n");
        String encodedFile = Base64.encodeToString(fileOs.toByteArray(), Base64.DEFAULT);
        writer.write(encodedFile);
        writer.write("\n");
    }
}

From source file:edu.coeia.reports.IndexUtil.java

public static List<String> getAllFilesBetweenSize(final CaseFacade caseFacade, final long from, final long to)
        throws IOException {
    List<String> files = new ArrayList<String>();

    for (String fileName : getAllFilePaths(caseFacade)) {
        File file = new File(fileName);
        long length = file.length();

        if (length >= from && length <= to) {
            files.add(fileName);/*from w  ww  .  j  av a 2  s .c o  m*/
        }
    }

    return files;
}

From source file:Main.java

public static byte[] encryptMD5File(File file) {
    FileInputStream in = null;/* ww  w  .  j  av a 2  s.c o m*/
    try {
        in = new FileInputStream(file);
        FileChannel channel = in.getChannel();
        MappedByteBuffer buffer = channel.map(FileChannel.MapMode.READ_ONLY, 0, file.length());
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(buffer);
        return md.digest();
    } catch (NoSuchAlgorithmException | IOException e) {
        e.printStackTrace();
    } finally {
        if (in != null) {
            try {
                in.close();
            } catch (IOException ignored) {
            }
        }
    }
    return null;
}

From source file:org.eclipse.oomph.setup.internal.sync.SyncUtil.java

public static void inititalizeFile(File file, EClass eClass, ResourceSet resourceSet) {
    if (file.length() == 0) {
        EObject rootObject = EcoreUtil.create(eClass);

        Resource resource = resourceSet
                .createResource(org.eclipse.emf.common.util.URI.createFileURI(file.getAbsolutePath()));
        resource.getContents().add(rootObject);
        BaseUtil.saveEObject(rootObject);
    }/*from   w  ww .jav  a 2 s .co  m*/
}

From source file:Main.java

public static byte[] readFromFile(String fileName, int offset, int len) {
    if (fileName == null) {
        return null;
    }/* w  w  w.  ja v a2s . co m*/

    File file = new File(fileName);
    if (!file.exists()) {
        Log.i(TAG, "readFromFile: file not found");
        return null;
    }

    if (len == -1) {
        len = (int) file.length();
    }

    Log.d(TAG, "readFromFile : offset = " + offset + " len = " + len + " offset + len = " + (offset + len));

    if (offset < 0) {
        Log.e(TAG, "readFromFile invalid offset:" + offset);
        return null;
    }
    if (len <= 0) {
        Log.e(TAG, "readFromFile invalid len:" + len);
        return null;
    }
    if (offset + len > (int) file.length()) {
        Log.e(TAG, "readFromFile invalid file len:" + file.length());
        return null;
    }

    byte[] b = null;
    try {
        RandomAccessFile in = new RandomAccessFile(fileName, "r");
        b = new byte[len]; //
        in.seek(offset);
        in.readFully(b);
        in.close();

    } catch (Exception e) {
        Log.e(TAG, "readFromFile : errMsg = " + e.getMessage());
        e.printStackTrace();
    }
    return b;
}

From source file:Main.java

public static byte[] readFromFile(String fileName, int offset, int len) {
    if (fileName == null) {
        return null;
    }/* ww  w  .j av  a2 s . c  o  m*/

    File file = new File(fileName);
    if (!file.exists()) {
        Log.i(TAG, "readFromFile: file not found");
        return null;
    }

    if (len == -1) {
        len = (int) file.length();
    }

    Log.d(TAG, "readFromFile : offset = " + offset + " len = " + len + " offset + len = " + (offset + len));

    if (offset < 0) {
        Log.e(TAG, "readFromFile invalid offset:" + offset);
        return null;
    }
    if (len <= 0) {
        Log.e(TAG, "readFromFile invalid len:" + len);
        return null;
    }
    if (offset + len > (int) file.length()) {
        Log.e(TAG, "readFromFile invalid file len:" + file.length());
        return null;
    }

    byte[] b = null;
    try {
        RandomAccessFile in = new RandomAccessFile(fileName, "r");
        b = new byte[len];
        in.seek(offset);
        in.readFully(b);
        in.close();

    } catch (Exception e) {
        Log.e(TAG, "readFromFile : errMsg = " + e.getMessage());
        e.printStackTrace();
    }
    return b;
}

From source file:edu.unc.lib.dl.util.FileUtils.java

public static byte[] readFileToByteArray(File file) throws IOException {
    byte[] buffer = new byte[(int) file.length()];
    InputStream ios = null;/*from   w w w . ja  v a2  s  .c  o m*/
    try {
        ios = new FileInputStream(file);
        if (ios.read(buffer) == -1) {
            throw new IOException("EOF reached while trying to read the whole file");
        }
        return buffer;
    } finally {
        if (ios != null)
            ios.close();
    }
}