Example usage for java.io ObjectInputStream available

Introduction

In this page you can find the example usage for java.io ObjectInputStream available.

Prototype

public int available() throws IOException 

Source Link

Document

Returns the number of bytes that can be read without blocking.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {

    FileOutputStream out = new FileOutputStream("test.txt");
    ObjectOutputStream oout = new ObjectOutputStream(out);

    oout.writeUTF("Hello World from java2s.com");
    oout.flush();/*  w  w w  .  ja  va2s.  c om*/
    oout.close();

    ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));

    for (int i = 0; i < ois.available();) {
        System.out.print((char) ois.read());
    }
    ois.close();
}

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From source file:Main.java

public static void main(String[] args) throws Exception {

    String s = "Hello World!";
    FileOutputStream out = new FileOutputStream("test.txt");
    ObjectOutputStream oout = new ObjectOutputStream(out);

    oout.writeUTF(s);//w w w .ja  va 2  s  .c  o  m
    oout.writeUTF("This is an example from java2s.com");
    oout.flush();
    oout.close();

    ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));

    ois.skipBytes(4);
    for (int i = 0; i < ois.available() - 4; i++) {
        System.out.print((char) ois.readByte());
    }
    ois.close();
}

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From source file:Main.java

public static void main(String[] args) throws Exception {

    FileOutputStream out = new FileOutputStream("test.txt");
    ObjectOutputStream oout = new ObjectOutputStream(out);

    // write something in the file
    oout.writeUTF("Hello World from java2s.com");
    oout.flush();// w ww  .j  a  v  a2s  . c o  m

    // create an ObjectInputStream for the file we created before
    ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));

    // read from the stream
    for (int i = 0; i < ois.available();) {
        System.out.print((char) ois.read());
    }

    ois.close();

}

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From source file:Main.java

public static void main(String[] args) throws Exception {

    FileOutputStream out = new FileOutputStream("test.txt");
    ObjectOutputStream oout = new ObjectOutputStream(out);

    // write something in the file
    oout.writeUTF("Hello World from java2s.com");
    oout.flush();//from   www . j a  va 2s  .c o m
    oout.close();
    // create an ObjectInputStream for the file we created before
    ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));

    // check how many bytes are available
    System.out.println(ois.available());
    ois.close();
}

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From source file:com.adobe.acs.commons.audit_log_search.impl.AuditLogSearchServlet.java

@SuppressWarnings("unchecked")
private JsonArray getModifiedProperties(ValueMap properties) throws IOException {
    JsonArray modifiedProperties = new JsonArray();
    InputStream is = properties.get("cq:properties", InputStream.class);
    if (is != null) {
        ObjectInputStream ois = new ObjectInputStream(is);
        ois.readInt();//from   w ww .j av  a2 s . c om

        while (ois.available() != -1) {
            try {
                Object obj = ois.readObject();
                if (obj instanceof HashSet) {
                    Set<String> propertiesSet = (Set<String>) obj;
                    for (String property : propertiesSet) {
                        modifiedProperties.add(new JsonPrimitive(property));
                    }
                    break;
                }
            } catch (Exception e) {
                break;
            }
        }
    }
    return modifiedProperties;
}

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From source file:com.bigdata.dastor.db.ColumnFamilyStore.java

protected Set<String> readSavedCache(File path, boolean sort) throws IOException {
    Set<String> keys;
    if (sort) {/*w  w  w . j a v a 2  s  .  com*/
        // sort the results on read because cache may be written many times during server lifetime,
        // so better to pay that price once on startup than sort at write time.
        keys = new TreeSet<String>(StorageProxy.keyComparator);
    } else {
        keys = new HashSet<String>();
    }

    long start = System.currentTimeMillis();
    if (path.exists()) {
        if (logger_.isDebugEnabled())
            logger_.debug("reading saved cache from " + path);
        ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(new FileInputStream(path)));
        Charset UTF8 = Charset.forName("UTF-8");
        while (in.available() > 0) {
            int size = in.readInt();
            byte[] bytes = new byte[size];
            in.readFully(bytes);
            keys.add(new String(bytes, UTF8));
        }
        in.close();
        if (logger_.isDebugEnabled())
            logger_.debug(String.format("completed reading (%d ms; %d keys) from saved cache at %s",
                    (System.currentTimeMillis() - start), keys.size(), path));
    }

    return keys;
}

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From source file:org.apache.hadoop.hive.ql.exec.spark.SparkDynamicPartitionPruner.java

private void processFiles(MapWork work, JobConf jobConf) throws HiveException {
    ObjectInputStream in = null;
    try {//from   ww w. j a  v  a 2s.  c om
        Path baseDir = work.getTmpPathForPartitionPruning();
        FileSystem fs = FileSystem.get(baseDir.toUri(), jobConf);

        // Find the SourceInfo to put values in.
        for (String name : sourceInfoMap.keySet()) {
            Path sourceDir = new Path(baseDir, name);
            for (FileStatus fstatus : fs.listStatus(sourceDir)) {
                LOG.info("Start processing pruning file: " + fstatus.getPath());
                in = new ObjectInputStream(fs.open(fstatus.getPath()));
                String columnName = in.readUTF();
                SourceInfo info = null;

                for (SourceInfo si : sourceInfoMap.get(name)) {
                    if (columnName.equals(si.columnName)) {
                        info = si;
                        break;
                    }
                }

                Preconditions.checkArgument(info != null,
                        "AssertionError: no source info for the column: " + columnName);

                // Read fields
                while (in.available() > 0) {
                    writable.readFields(in);

                    Object row = info.deserializer.deserialize(writable);
                    Object value = info.soi.getStructFieldData(row, info.field);
                    value = ObjectInspectorUtils.copyToStandardObject(value, info.fieldInspector);
                    info.values.add(value);
                }
            }
        }
    } catch (Exception e) {
        throw new HiveException(e);
    } finally {
        try {
            if (in != null) {
                in.close();
            }
        } catch (IOException e) {
            throw new HiveException("error while trying to close input stream", e);
        }
    }
}

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From source file:org.scantegrity.crypto.FlatFileTable.java

public FlatFileTable(String p_path) throws FileNotFoundException, IOException, ClassNotFoundException {
    ObjectInputStream l_in = new ObjectInputStream(new FileInputStream(p_path));
    int l_size = l_in.read();

    c_list = new ArrayList<ArrayList<Object>>();

    while (l_in.available() > 0) {
        ArrayList<Object> l_row = new ArrayList<Object>();
        for (int x = 0; x < l_size; x++)
            l_row.add(l_in.readObject());
        c_list.add(l_row);/* w ww.j  ava2 s.  c om*/
    }
}

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From source file:tvbrowser.core.Settings.java

private static void loadWindowSettings() {
    File windowSettingsFile = new File(Settings.getUserSettingsDirName(), WINDOW_SETTINGS_FILE);

    if (windowSettingsFile.isFile() && windowSettingsFile.canRead()) {
        try {//  w ww.  j a  v  a  2  s.  c om
            StreamUtilities.objectInputStream(windowSettingsFile, new ObjectInputStreamProcessor() {
                public void process(ObjectInputStream in) throws IOException {
                    if (in.available() > 0) {
                        in.readInt(); // read version

                        int n = in.readInt(); // read number of window settings

                        mWindowSettings = new HashMap<String, WindowSetting>(n);

                        for (int i = 0; i < n; i++) {
                            mWindowSettings.put(in.readUTF(), new WindowSetting(in));
                        }
                    }

                    in.close();
                }
            });
        } catch (Exception e) {
            // propably defect settings, create new settings
            mWindowSettings = null;
        }
    }

    if (mWindowSettings == null) {
        mWindowSettings = new HashMap<String, WindowSetting>(1);
    }
}

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