Example usage for java.io ObjectInputStream readFully

Introduction

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

Prototype

public void readFully(byte[] buf) throws IOException 

Source Link

Document

Reads bytes, blocking until all bytes are read.

Usage

From source file:Main.java

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

    String s = "Hello World from java2s.com";

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

    // write something in the file
    oout.writeUTF(s);//  w w  w .  j a  v a  2  s .  c  o  m
    oout.flush();
    oout.close();
    // create an ObjectInputStream for the file we created before
    ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));

    // read and print the whole content
    byte[] b = new byte[13];
    ois.readFully(b);
    String array = new String(b);
    System.out.println(array);
    ois.close();
}

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From source file:net.sf.jasperreports.engine.base.JRVirtualPrintPage.java

private void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException {
    Object object = in.readObject();
    if (object instanceof VirtualizableElementList) {
        elements = (VirtualizableElementList) object;
    } else {/* www.j  a va  2  s  . c  o  m*/
        // page serialized by old version
        String oldUid = (String) object;
        if (log.isDebugEnabled()) {
            log.debug("Original page uid " + oldUid);
        }

        JRVirtualizationContext virtualizationContext = (JRVirtualizationContext) in.readObject();

        int length = in.readInt();
        byte[] buffer = new byte[length];
        in.readFully(buffer);
        ByteArrayInputStream inputStream = new ByteArrayInputStream(buffer, 0, buffer.length);
        VirtualizationObjectInputStream elementsStream = new VirtualizationObjectInputStream(inputStream,
                virtualizationContext);
        try {
            @SuppressWarnings("unchecked")
            List<JRPrintElement> elementsList = (List<JRPrintElement>) elementsStream.readObject();

            // create a new list for the elements
            elements = new VirtualizableElementList(virtualizationContext, this);
            elements.addAll(elementsList);
        } finally {
            elementsStream.close();
        }
    }
}

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From source file:net.sf.jasperreports.engine.base.ElementsBlock.java

@SuppressWarnings("unchecked")
private void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException {
    // we do not use the original ID as the source object might still be
    // alive in the JVM
    String oldUid = (String) in.readObject();
    uid = makeUID();/* w  w w . j  a v a2s.co  m*/
    if (log.isDebugEnabled()) {
        log.debug("Original uid " + oldUid + "; new uid " + uid);
    }

    context = (JRVirtualizationContext) in.readObject();

    int length = in.readInt();
    //FIXME put a limit on the buffer
    byte[] buffer = new byte[length];
    in.readFully(buffer);
    ByteArrayInputStream inputStream = new ByteArrayInputStream(buffer, 0, buffer.length);
    VirtualizationObjectInputStream elementsStream = new VirtualizationObjectInputStream(inputStream, context);
    elements = (List<JRPrintElement>) elementsStream.readObject();
    size = elements.size();

    if (!elements.isEmpty()) {
        register();
    }
}

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From source file:mitm.application.djigzo.james.Certificates.java

private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
    try {//w w  w . j ava 2 s.  c om
        CertificateFactory certificateFactory = SecurityFactoryFactory.getSecurityFactory()
                .createCertificateFactory("X.509");

        certificates = new HashSet<X509Certificate>();

        long version = in.readLong();

        if (version != serialVersionUID) {
            throw new SerializationException("Version expected '" + serialVersionUID + "' but got '" + version);
        }

        /*
         * Read how many certificates we have to read.
         */
        int nrOfCertificates = in.readInt();

        for (int i = 0; i < nrOfCertificates; i++) {
            int encodedSize = in.readInt();

            byte[] encoded = new byte[encodedSize];

            in.readFully(encoded);

            X509Certificate certificate = (X509Certificate) certificateFactory
                    .generateCertificate(new ByteArrayInputStream(encoded));

            certificates.add(certificate);
        }
    } catch (NoSuchProviderException e) {
        throw new NoSuchProviderRuntimeException(e);
    } catch (CertificateException e) {
        throw new IOException(e);
    } catch (SecurityFactoryFactoryException e) {
        throw new IOException(e);
    }
}

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From source file:com.github.jsonj.JsonObject.java

void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException {
    // when deserializing, parse the json string
    try {/* w ww. j av a 2s .co m*/
        int length = in.readInt();
        byte[] buf = new byte[length];
        in.readFully(buf);
        if (parser == null) {
            // create it lazily, static so won't increase object size
            parser = new JsonParser();
        }
        JsonElement o = parser.parse(new String(buf, UTF8));
        Field f = getClass().getDeclaredField("intMap");
        f.setAccessible(true);
        f.set(this, new SimpleIntKeyMap<>());

        for (Entry<String, JsonElement> e : o.asObject().entrySet()) {
            put(e.getKey(), e.getValue());
        }
    } catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException e) {
        throw new IllegalStateException(e);
    }
}

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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) {/*from  ww  w.j  a  v a2  s . c  o  m*/
        // 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.eclipse.wb.internal.core.utils.IOUtils2.java

/**
 * @return the byte[] array, read length and then bytes.
 *///from   w  w w .  j a v a 2s .  co  m
public static byte[] readByteArray(ObjectInputStream ois) throws IOException {
    int length = ois.readInt();
    byte[] bytes = new byte[length];
    ois.readFully(bytes);
    return bytes;
}

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