Example usage for java.nio.channels FileChannel size

List of usage examples for java.nio.channels FileChannel size

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Introduction

In this page you can find the example usage for java.nio.channels FileChannel size.

Prototype

public abstract long size() throws IOException;

Source Link

Document

Returns the current size of this channel's file.

Usage

From source file:org.sleuthkit.autopsy.recentactivity.Util.java

public static String readFile(String path) throws IOException {
    FileInputStream stream = new FileInputStream(new File(path));
    try {/*from   ww  w .  j a va  2s  .c  om*/
        FileChannel fc = stream.getChannel();
        MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
        /*
         * Instead of using default, pass in a decoder.
         */
        return Charset.defaultCharset().decode(bb).toString();
    } finally {
        stream.close();
    }
}

From source file:nl.b3p.applet.local.Shapefiles.java

/** Returns a JSON object with shapefile and DBF metadata.
 * /*from ww w.ja  va2s  .  c  o  m*/
 * @param file the shapefile to read
 * @return a JSON object, read the code to find out which properties
 */
public static String getMetadata(String file) throws IOException, JSONException {

    if (!file.toLowerCase().endsWith(".shp")) {
        throw new IllegalArgumentException("File does not end with .shp: " + file);
    }

    FileChannel channel = new FileInputStream(file).getChannel();
    ShapefileHeader header = new ShapefileHeader();
    ByteBuffer bb = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
    header.read(bb, true);
    channel.close();
    channel = null;
    file = file.substring(0, file.length() - 4) + ".dbf";

    JSONObject j = new JSONObject();
    j.put("type", header.getShapeType().name);
    j.put("version", header.getVersion());
    j.put("minX", header.minX());
    j.put("minY", header.minY());
    j.put("maxX", header.maxX());
    j.put("maxY", header.maxY());

    JSONObject dbf = new JSONObject();
    j.put("dbf", dbf);
    try {
        channel = new FileInputStream(file).getChannel();
        DbaseFileHeader dheader = new DbaseFileHeader();
        bb = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
        dheader.readHeader(bb);
        dbf.put("numRecords", dheader.getNumRecords());
        JSONArray fields = new JSONArray();
        dbf.put("fields", fields);
        for (int i = 0; i < dheader.getNumFields(); i++) {
            JSONObject field = new JSONObject();
            fields.put(field);
            field.put("name", dheader.getFieldName(i));
            field.put("length", dheader.getFieldLength(i));
            field.put("decimalCount", dheader.getFieldDecimalCount(i));
            field.put("class", dheader.getFieldClass(i).getName().toString());
            field.put("type", dheader.getFieldType(i) + "");
        }
    } catch (Exception e) {
        dbf.put("error", e.toString());
    } finally {
        if (channel != null) {
            channel.close();
        }
    }

    file = file.substring(0, file.length() - 4) + ".prj";
    File f = new File(file);
    String prj = null;
    if (f.exists()) {
        Scanner s = new Scanner(f);
        prj = "";
        try {
            while (s.hasNextLine()) {
                if (prj.length() > 0) {
                    prj += "\n";
                }
                prj += s.nextLine();
            }
        } finally {
            s.close();
        }
    }
    j.put("prj", prj);

    return j.toString();
}

From source file:org.apache.solr.util.FileUtils.java

public static void copyFile(File src, File destination) throws IOException {
    FileChannel in = null;
    FileChannel out = null;/* w w w . j  av  a 2 s . c om*/
    try {
        in = new FileInputStream(src).getChannel();
        out = new FileOutputStream(destination).getChannel();
        in.transferTo(0, in.size(), out);
    } finally {
        try {
            if (in != null)
                in.close();
        } catch (IOException e) {
        }
        try {
            if (out != null)
                out.close();
        } catch (IOException e) {
        }
    }
}

From source file:com.project.utilities.Utilities.java

public static ArrayList<ViolationDataModel> readViolationJSONFileToArray() {
    ArrayList<ViolationDataModel> violation = new ArrayList<ViolationDataModel>();
    Gson gson = new Gson();
    String jsonStr = "";
    try {//from  w  ww  . j ava  2 s.c om
        File jsonFile = new File(Constants.EXTERNAL_DIRECTORY + "/" + Constants.FILENAME_VIOLATION_JSON);

        if (!jsonFile.exists()) {
            Log.e("VIOLATION_JSON_LIST", "Error reading file");
        } else {
            Log.e("readJsonFile", "File Found");
        }

        FileInputStream stream = new FileInputStream(jsonFile);
        try {
            FileChannel fc = stream.getChannel();
            MappedByteBuffer byteBuffer = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
            jsonStr = Charset.defaultCharset().decode(byteBuffer).toString();
        } finally {
            stream.close();
        }
    } catch (Exception e) {
        Log.e("readJsonFile", e.getMessage());
    }

    try {
        JSONObject jsonContent = new JSONObject(jsonStr);
        violation = gson.fromJson(jsonContent.getString("data"),
                new TypeToken<ArrayList<ViolationDataModel>>() {
                }.getType());
    } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        Log.e("Error GSON", e.getMessage().toString());
    }
    return violation;
}

From source file:Main.java

private static void copy(File srcFile, File targetFile) throws IOException {
    FileChannel src = null, dst = null;
    try {/*from w w  w  .ja v  a  2 s. com*/
        if (srcFile.exists() && (!targetFile.exists() || targetFile.delete())) {
            src = new FileInputStream(srcFile).getChannel();
            dst = new FileOutputStream(targetFile).getChannel();
            dst.transferFrom(src, 0, src.size());
            src.close();
            dst.close();
        }
    } finally {
        try {
            if (src != null)
                src.close();
        } catch (IOException e) {
            Log.e("DIARY", "Failed to close resource.", e);
        }
        try {
            if (dst != null)
                src.close();
        } catch (IOException e) {
            Log.e("DIARY", "Failed to close resource.", e);
        }
    }
}

From source file:com.bazaarvoice.seo.sdk.util.BVUtility.java

public static String readFile(String path) throws IOException {
    FileInputStream stream = new FileInputStream(new File(path));
    try {/*from   ww w  .  j  a v a  2  s .com*/
        FileChannel fc = stream.getChannel();
        MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
        return Charset.forName("UTF-8").decode(bb).toString();
    } finally {
        stream.close();
    }
}

From source file:org.nuclos.common2.File.java

/**
 * Simple Method for copying files with FileChannel
 * FIX ELISA-6498/*  ww w. j av a  2  s  . c  o  m*/
 * 
 * @param in
 * @param out
 * @throws IOException
 */
public static void copyFile(java.io.File in, java.io.File out) throws IOException {
    FileChannel inChannel = new FileInputStream(in).getChannel();
    FileChannel outChannel = new FileOutputStream(out).getChannel();
    try {
        inChannel.transferTo(0, inChannel.size(), outChannel);
    } catch (IOException e) {
        throw e;
    } finally {
        if (inChannel != null)
            inChannel.close();
        if (outChannel != null)
            outChannel.close();
    }
}

From source file:nl.b3p.catalog.arcgis.Shapefiles.java

/** Returns a JSON object with shapefile and DBF metadata.
 *
 * @param file the shapefile to read//from  w  w  w .  j  ava 2s  . c om
 * @return a JSON object, read the code to find out which properties
 */
public static String getMetadata(String file) throws IOException, JSONException {

    if (!file.toLowerCase().endsWith(".shp")) {
        throw new IllegalArgumentException("File does not end with .shp: " + file);
    }

    JSONObject j = new JSONObject();

    String localFilename = new File(file).getName();
    String title = "";
    int dotIndex = localFilename.lastIndexOf(".");
    if (dotIndex > 0) {
        title = localFilename.substring(0, dotIndex);
    } else if (dotIndex == 0) {
        title = localFilename.substring(1);
    }
    j.put("title", title);

    FileChannel channel = new FileInputStream(file).getChannel();
    ShapefileHeader header = new ShapefileHeader();
    ByteBuffer bb = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
    header.read(bb, true);
    channel.close();
    channel = null;
    file = file.substring(0, file.length() - 4) + ".dbf";

    j.put("type", header.getShapeType().name);
    j.put("version", header.getVersion());
    j.put("minX", header.minX());
    j.put("minY", header.minY());
    j.put("maxX", header.maxX());
    j.put("maxY", header.maxY());

    JSONObject dbf = new JSONObject();
    j.put("dbf", dbf);
    try {
        channel = new FileInputStream(file).getChannel();
        DbaseFileHeader dheader = new DbaseFileHeader();
        bb = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
        dheader.readHeader(bb);
        dbf.put("numRecords", dheader.getNumRecords());
        JSONArray fields = new JSONArray();
        dbf.put("fields", fields);
        for (int i = 0; i < dheader.getNumFields(); i++) {
            JSONObject field = new JSONObject();
            fields.put(field);
            field.put("name", dheader.getFieldName(i));
            field.put("length", dheader.getFieldLength(i));
            field.put("decimalCount", dheader.getFieldDecimalCount(i));
            field.put("class", dheader.getFieldClass(i).getName().toString());
            field.put("type", dheader.getFieldType(i) + "");
        }
    } catch (Exception e) {
        dbf.put("error", e.toString());
    } finally {
        if (channel != null) {
            channel.close();
        }
    }

    file = file.substring(0, file.length() - 4) + ".prj";
    File f = new File(file);
    String prj = null;
    if (f.exists()) {
        Scanner s = new Scanner(f);
        prj = "";
        try {
            while (s.hasNextLine()) {
                if (prj.length() > 0) {
                    prj += "\n";
                }
                prj += s.nextLine();
            }
        } finally {
            s.close();
        }
    }
    j.put("prj", prj);

    return j.toString();
}

From source file:edu.clemson.cs.nestbed.server.util.FileUtils.java

public static void copyFile(File in, File out) throws FileNotFoundException, IOException {
    FileChannel sourceChannel = null;
    FileChannel destinationChannel = null;

    try {//from   ww w  .j  a  va2s.  c  o  m
        sourceChannel = new FileInputStream(in).getChannel();
        destinationChannel = new FileOutputStream(out).getChannel();
        sourceChannel.transferTo(0, sourceChannel.size(), destinationChannel);
    } finally {
        try {
            sourceChannel.close();
        } catch (Exception ex) {
        }
        try {
            destinationChannel.close();
        } catch (Exception ex) {
        }
    }
}

From source file:Main.java

/**
 * /*from  w  w  w . j a v  a2 s  .com*/
 * copy file
 * 
 * @param src
 *            source file
 * @param dest
 *            target file
 * @throws IOException
 */
public static void copyFile(File src, File dest) throws IOException {
    FileChannel inChannel = null;
    FileChannel outChannel = null;
    try {
        if (!dest.exists()) {
            dest.createNewFile();
        }
        inChannel = new FileInputStream(src).getChannel();
        outChannel = new FileOutputStream(dest).getChannel();
        inChannel.transferTo(0, inChannel.size(), outChannel);
    } finally {
        if (inChannel != null) {
            inChannel.close();
        }
        if (outChannel != null) {
            outChannel.close();
        }
    }
}