kaljurand_at_gmail_dot_com.diktofon.MyFileUtils.java Source code

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Here is the source code for kaljurand_at_gmail_dot_com.diktofon.MyFileUtils.java

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/*
 * Copyright 2011, Institute of Cybernetics at Tallinn University of Technology
 *
 * 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.
 */

package kaljurand_at_gmail_dot_com.diktofon;

import org.apache.commons.io.FileUtils;

import java.io.File;
import java.io.IOException;

public class MyFileUtils {

    public static String getSizeAsString(long size) {
        String sizeAsString;
        if (size > FileUtils.ONE_MB) {
            sizeAsString = (long) (size / FileUtils.ONE_MB) + "MB";
        } else if (size > FileUtils.ONE_KB) {
            sizeAsString = (long) (size / FileUtils.ONE_KB) + "kB";
        } else {
            sizeAsString = size + "b";
        }
        if (size > NetSpeechApiUtils.MAX_AUDIO_FILE_LENGTH) {
            sizeAsString += " !!!";
        }
        return sizeAsString;
    }

    public static String getSizeAsStringExact(long size) {
        String sizeAsString;
        if (size > FileUtils.ONE_MB) {
            sizeAsString = String.format("%.1fMB", (float) size / FileUtils.ONE_MB);
        } else if (size > FileUtils.ONE_KB) {
            sizeAsString = String.format("%.1fkB", (float) size / FileUtils.ONE_KB);
        } else {
            sizeAsString = size + "b";
        }
        if (size > NetSpeechApiUtils.MAX_AUDIO_FILE_LENGTH) {
            sizeAsString += " !!!";
        }
        return sizeAsString;
    }

    public static void createNomedia() {
        File f = Dirs.getNomediaFile();
        if (!f.exists()) {
            try {
                FileUtils.touch(f);
            } catch (IOException e) {
            }
        }
    }

    public static void saveFile(File f, String content) throws IOException {
        File dir = f.getParentFile();
        if (!dir.exists() && !dir.mkdirs()) {
            throw new IOException("Cannot create directory: " + dir);
        }
        FileUtils.writeStringToFile(f, content, "UTF8");
    }

    public static String loadFile(File f) throws IOException {
        return FileUtils.readFileToString(f, "UTF8");
    }

    public static void deleteFile(File f) throws IOException {
        FileUtils.forceDelete(f);
    }

    // TODO: could also use: File.renameTo(File)
    public static File moveFileToRecordingsDir(File file) throws IOException {
        String ext = getExtension(file.getName());
        String newFileName = String.valueOf(System.currentTimeMillis()) + ext;
        String newPath = Dirs.getRecordingsDir().getAbsolutePath() + "/" + newFileName;
        File newFile = new File(newPath);
        if (newFile.exists()) {
            throw new IOException("Not overwriting existing file: " + newFileName);
        }
        FileUtils.moveFile(file, newFile);
        return newFile;
    }

    // TODO: share code with moveFile...
    public static File copyFileToRecordingsDir(File file) throws IOException {
        String ext = getExtension(file.getName());
        String newFileName = String.valueOf(System.currentTimeMillis()) + ext;
        String newPath = Dirs.getRecordingsDir().getAbsolutePath() + "/" + newFileName;
        File newFile = new File(newPath);
        if (newFile.exists()) {
            throw new IOException("Not overwriting existing file: " + newFileName);
        }
        FileUtils.copyFile(file, newFile);
        return newFile;
    }

    // Doesn't seem to work... :(
    /*
    public static String guessMime(String url) {
       String mime = URLConnection.guessContentTypeFromName(url);
       if (mime == null) {
     return "audio/wav";
       }
       return mime;
    }
     */

    /**
     * TODO: use something more official, e.g. URLConnection.guessContentTypeFromName
     * 
     * Note that "audio/amr" does not work with the transcription server (2011-04-05)
     */
    public static String guessMime(String path) {
        String ext = getExtension(path);
        if (".aac".equals(ext))
            return "audio/aac";
        if (".flac".equals(ext))
            return "audio/flac";
        if (".aiff".equals(ext))
            return "audio/aiff";
        if (".aif".equals(ext))
            return "audio/aiff";
        if (".mka".equals(ext))
            return "audio/x-matroska";
        if (".mkv".equals(ext))
            return "video/x-matroska";
        if (".ogg".equals(ext))
            return "audio/ogg";
        if (".mp2".equals(ext))
            return "audio/mpeg";
        if (".mp3".equals(ext))
            return "audio/mpeg";
        if (".mp4".equals(ext))
            return "audio/mp4";
        if (".amr".equals(ext))
            return "audio/AMR";
        if (".3gpp".equals(ext))
            return "audio/3gpp";
        return "audio/wav";
    }

    private static String getExtension(String path) {
        int dot = path.lastIndexOf('.');
        if (dot == -1) {
            return "";
        }
        return path.substring(dot);
    }
}