Example usage for java.io DataInput readInt

Introduction

In this page you can find the example usage for java.io DataInput readInt.

Prototype

int readInt() throws IOException;

Source Link

Document

Reads four input bytes and returns an int value.

Usage

From source file:com.willetinc.hadoop.mapreduce.dynamodb.AttributeValueIOUtils.java

public static Collection<AttributeValue> readCollection(Types type, DataInput in) throws IOException {
    int size = in.readInt();
    List<AttributeValue> list = new ArrayList<AttributeValue>(size);
    for (int i = 0; i < size; i++) {
        list.add(read(type, in));/*from  w  w w. j  a  v  a2 s. c  o  m*/
    }

    return list;
}

From source file:org.lilyproject.repository.impl.id.AbsoluteRecordIdImpl.java

public static AbsoluteRecordId fromBytes(byte[] bytes, IdGenerator idGenerator) {
    ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);
    DataInput dataInput = new DataInputStream(byteArrayInputStream);

    byte[] tableBytes;
    byte[] recordIdBytes;

    try {//w  w w .  java2  s  . co  m
        tableBytes = new byte[dataInput.readInt()];
        dataInput.readFully(tableBytes, 0, tableBytes.length);
        recordIdBytes = new byte[dataInput.readInt()];
        dataInput.readFully(recordIdBytes, 0, recordIdBytes.length);
    } catch (IOException ioe) {
        throw new RuntimeException("Error while deserializing AbsoluteRecordId", ioe);
    }

    return new AbsoluteRecordIdImpl(new String(tableBytes), idGenerator.fromBytes(recordIdBytes));

}

From source file:org.apache.hadoop.hbase.util.BloomFilterFactory.java

/**
 * Instantiates the correct Bloom filter class based on the version provided
 * in the meta block data./* www.  j  a  va2s  .  c  om*/
 *
 * @param meta the byte array holding the Bloom filter's metadata, including
 *          version information
 * @param reader the {@link HFile} reader to use to lazily load Bloom filter
 *          blocks
 * @return an instance of the correct type of Bloom filter
 * @throws IllegalArgumentException
 */
public static BloomFilter createFromMeta(DataInput meta, HFile.Reader reader)
        throws IllegalArgumentException, IOException {
    int version = meta.readInt();
    switch (version) {
    case ByteBloomFilter.VERSION:
        // This is only possible in a version 1 HFile. We are ignoring the
        // passed comparator because raw byte comparators are always used
        // in version 1 Bloom filters.
        return new ByteBloomFilter(meta);

    case CompoundBloomFilterBase.VERSION:
        return new CompoundBloomFilter(meta, reader);

    default:
        throw new IllegalArgumentException("Bad bloom filter format version " + version);
    }
}

From source file:org.apache.pig.data.DataReaderWriter.java

public static String bytesToBigCharArray(DataInput in) throws IOException {
    int size = in.readInt();
    byte[] ba = new byte[size];
    in.readFully(ba);/* w  ww . j a  va2  s  . c om*/
    return new String(ba, DataReaderWriter.UTF8);
}

From source file:org.apache.pig.data.DataReaderWriter.java

public static Map<String, Object> bytesToMap(DataInput in) throws IOException {
    int size = in.readInt();
    Map<String, Object> m = new HashMap<String, Object>(size);
    for (int i = 0; i < size; i++) {
        String key = (String) readDatum(in);
        m.put(key, readDatum(in));/*from w w w . j a v  a  2 s.c o  m*/
    }
    return m;
}

From source file:org.apache.pig.data.DataReaderWriter.java

public static InternalMap bytesToInternalMap(DataInput in) throws IOException {
    int size = in.readInt();
    InternalMap m = new InternalMap(size);
    for (int i = 0; i < size; i++) {
        Object key = readDatum(in);
        m.put(key, readDatum(in));/*from w  ww  .  ja  v a2  s. c om*/
    }
    return m;
}

From source file:com.bah.culvert.util.Bytes.java

/**
 * Read a a byte [] written with {@link #writeByteArray(DataOutput, byte[])}
 * @param input to read from/*from w w  w .  j a  v a2s.  c  om*/
 * @return the first element in the input stream as a byte[]
 * @throws IOException on failure to read
 */
public static byte[] readByteArray(DataInput input) throws IOException {
    byte[] bytes = new byte[input.readInt()];
    input.readFully(bytes);
    return bytes;
}

From source file:com.icloud.framework.core.util.FBUtilities.java

public static ByteBuffer readByteArray(DataInput in) throws IOException {
    int length = in.readInt();
    if (length < 0) {
        throw new IOException("Corrupt (negative) value length encountered");
    }//from  ww  w.j  a  v a  2  s.  co m

    ByteBuffer bb = ByteBuffer.allocate(length);
    if (length > 0) {
        in.readFully(bb.array(), bb.position(), bb.remaining());
    }
    return bb;
}

From source file:com.wsc.myexample.decisionForest.MyDataset.java

public static String[] readStringArray(DataInput in) throws IOException {
    int len = in.readInt();
    if (len == -1)
        return null;
    String[] s = new String[len];
    for (int i = 0; i < len; i++) {
        s[i] = readString(in);/*from  w ww  . j ava2s .  c  o  m*/
    }
    return s;
}

From source file:com.wsc.myexample.decisionForest.MyDataset.java

public static String readString(DataInput in) throws IOException {
    int length = in.readInt();
    if (length == -1)
        return null;
    byte[] buffer = new byte[length];
    in.readFully(buffer); // could/should use readFully(buffer,0,length)?
    return new String(buffer, "UTF-8");
}