Java Code Examples for android.text.TextUtils#safeIntern()

/**
 * Moves an existing temporary file to a new log filename.
 *
 * @param temp file to rename
 * @param dir to store file in
 * @param tag to use for new log file name
 * @param timestampMillis of log entry
 * @param flags for the entry data
 * @param blockSize to use for space accounting
 * @throws IOException if the file can't be moved
 */
public EntryFile(File temp, File dir, String tag,long timestampMillis,
                 int flags, int blockSize) throws IOException {
    if ((flags & DropBoxManager.IS_EMPTY) != 0) throw new IllegalArgumentException();

    this.tag = TextUtils.safeIntern(tag);
    this.timestampMillis = timestampMillis;
    this.flags = flags;

    final File file = this.getFile(dir);
    if (!temp.renameTo(file)) {
        throw new IOException("Can't rename " + temp + " to " + file);
    }
    this.blocks = (int) ((file.length() + blockSize - 1) / blockSize);
}
 

/**
 * Extracts metadata from an existing on-disk log filename.
 *
 * Note when a filename is not recognizable, it will create an instance that
 * {@link #hasFile()} would return false on, and also remove the file.
 *
 * @param file name of existing log file
 * @param blockSize to use for space accounting
 */
public EntryFile(File file, int blockSize) {

    boolean parseFailure = false;

    String name = file.getName();
    int flags = 0;
    String tag = null;
    long millis = 0;

    final int at = name.lastIndexOf('@');
    if (at < 0) {
        parseFailure = true;
    } else {
        tag = Uri.decode(name.substring(0, at));
        if (name.endsWith(".gz")) {
            flags |= DropBoxManager.IS_GZIPPED;
            name = name.substring(0, name.length() - 3);
        }
        if (name.endsWith(".lost")) {
            flags |= DropBoxManager.IS_EMPTY;
            name = name.substring(at + 1, name.length() - 5);
        } else if (name.endsWith(".txt")) {
            flags |= DropBoxManager.IS_TEXT;
            name = name.substring(at + 1, name.length() - 4);
        } else if (name.endsWith(".dat")) {
            name = name.substring(at + 1, name.length() - 4);
        } else {
            parseFailure = true;
        }
        if (!parseFailure) {
            try {
                millis = Long.parseLong(name);
            } catch (NumberFormatException e) {
                parseFailure = true;
            }
        }
    }
    if (parseFailure) {
        Slog.wtf(TAG, "Invalid filename: " + file);

        // Remove the file and return an empty instance.
        file.delete();
        this.tag = null;
        this.flags = DropBoxManager.IS_EMPTY;
        this.timestampMillis = 0;
        this.blocks = 0;
        return;
    }

    this.blocks = (int) ((file.length() + blockSize - 1) / blockSize);
    this.tag = TextUtils.safeIntern(tag);
    this.flags = flags;
    this.timestampMillis = millis;
}
 

/**
 * Creates a zero-length tombstone for a file whose contents were lost.
 *
 * @param dir to store file in
 * @param tag to use for new log file name
 * @param timestampMillis of log entry
 * @throws IOException if the file can't be created.
 */
public EntryFile(File dir, String tag, long timestampMillis) throws IOException {
    this.tag = TextUtils.safeIntern(tag);
    this.timestampMillis = timestampMillis;
    this.flags = DropBoxManager.IS_EMPTY;
    this.blocks = 0;
    new FileOutputStream(getFile(dir)).close();
}