Example usage for java.io DataInput readByte

Introduction

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

Prototype

byte readByte() throws IOException;

Source Link

Document

Reads and returns one input byte.

Usage

From source file:Main.java

public static byte[] readByteBuffer(DataInput in) throws Exception {
    int b = in.readByte();
    if (b == 1) {
        b = in.readInt();//w w w . j  av a2 s.  c  om
        byte[] buf = new byte[b];
        in.readFully(buf, 0, buf.length);
        return buf;
    }
    return null;
}

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From source file:com.smartitengineering.cms.api.impl.Utils.java

public static String readStringInUTF8(DataInput in) throws IOException, UnsupportedEncodingException {
    int allocationBlockSize = 2000;
    int capacity = allocationBlockSize;
    int length = 0;
    ByteBuffer buffer = ByteBuffer.allocate(allocationBlockSize);
    boolean notEof = true;
    while (notEof) {
        try {/*from   w  ww  .  j  av  a  2 s  . com*/
            buffer.put(in.readByte());
            if (++length >= capacity) {
                capacity += allocationBlockSize;
                buffer.limit(capacity);
            }
        } catch (EOFException ex) {
            notEof = false;
        }
    }
    String string = StringUtils.newStringUtf8(Arrays.copyOf(buffer.array(), length));
    return string;
}

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

/** @return An unsigned short in an integer. */
private static int readShortLength(DataInput in) throws IOException {
    int length = (in.readByte() & 0xFF) << 8;
    return length | (in.readByte() & 0xFF);
}

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From source file:net.darkmist.alib.io.Slurp.java

public static byte[] slurp(DataInput din) throws IOException {
    ByteArrayOutputStream baos;//  ww  w .  ja v a2 s .c  o m
    int b;

    if (din instanceof InputStream)
        return IOUtils.toByteArray((InputStream) din);
    baos = new ByteArrayOutputStream();
    while (true) {
        try {
            b = din.readByte();
        } catch (EOFException e) {
            return baos.toByteArray();
        }
        baos.write(b);
    }
}

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From source file:com.aliyun.odps.io.TupleReaderWriter.java

/**
 * ????Tuple/*from   ww w .  j a  va  2s . c o m*/
 *
 * @param in
 *     ??Tuplefield
 * @param t
 *     ????Tuple
 * @throws IOException
 *     ???Tuple??
 */
public static void readTuple(DataInput in, Tuple t) throws IOException {
    // Make sure it's a tuple.
    byte b = in.readByte();
    if (b != TUPLE) {
        String msg = "Unexpected data while reading tuple from binary file.";
        throw new IOException(msg);
    }

    // Read the number of fields
    int sz = in.readInt();
    for (int i = 0; i < sz; i++) {
        byte type = in.readByte();
        t.append(readDatum(in, type));
    }
}

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From source file:hivemall.fm.FFMPredictionModel.java

@Nonnull
private static void readEntry(@Nonnull final DataInput in, final int factors, @Nonnull final float[] Vf,
        @Nonnull Entry dst) throws IOException {
    final byte type = in.readByte();
    switch (type) {
    case HALF_FLOAT_ENTRY: {
        float W = HalfFloat.halfFloatToFloat(in.readShort());
        dst.setW(W);// w w  w . ja  va2  s  .c  o m
        for (int i = 0; i < factors; i++) {
            Vf[i] = HalfFloat.halfFloatToFloat(in.readShort());
        }
        dst.setV(Vf);
        break;
    }
    case W_ONLY_HALF_FLOAT_ENTRY: {
        float W = HalfFloat.halfFloatToFloat(in.readShort());
        dst.setW(W);
        break;
    }
    case FLOAT_ENTRY: {
        float W = in.readFloat();
        dst.setW(W);
        IOUtils.readFloats(in, Vf);
        dst.setV(Vf);
        break;
    }
    case W_ONLY_FLOAT_ENTRY: {
        float W = in.readFloat();
        dst.setW(W);
        break;
    }
    default:
        throw new IOException("Unexpected Entry type: " + type);
    }
}

---

From source file:com.aliyun.odps.io.TupleReaderWriter.java

@SuppressWarnings("unchecked")
private static Writable readDatum(DataInput in, byte type) throws IOException {
    switch (type) {
    case TUPLE:/*from  www. j a v a 2  s. c  o m*/
        int sz = in.readInt();
        // if sz == 0, we construct an "empty" tuple -
        // presumably the writer wrote an empty tuple!
        if (sz < 0) {
            throw new IOException("Invalid size " + sz + " for a tuple");
        }
        Tuple tp = new Tuple(sz);
        for (int i = 0; i < sz; i++) {
            byte b = in.readByte();
            tp.set(i, readDatum(in, b));
        }

        return tp;

    case NULL:
        return null;

    case INTWRITABLE:
        IntWritable iw = new IntWritable();
        iw.readFields(in);
        return iw;

    case LONGWRITABLE:
        LongWritable lw = new LongWritable();
        lw.readFields(in);
        return lw;

    case DATETIMEWRITABLE:
        DatetimeWritable dtw = new DatetimeWritable();
        dtw.readFields(in);
        return dtw;

    case DOUBLEWRITABLE:
        DoubleWritable dw = new DoubleWritable();
        dw.readFields(in);
        return dw;

    case BOOLEANWRITABLE:
        BooleanWritable bw = new BooleanWritable();
        bw.readFields(in);
        return bw;

    case BYTESWRITABLE:
        BytesWritable bsw = new BytesWritable();
        bsw.readFields(in);
        return bsw;

    case TEXT:
        Text t = new Text();
        t.readFields(in);
        return t;

    case NULLWRITABLE:
        NullWritable nw = NullWritable.get();
        nw.readFields(in);
        return nw;

    case UNKNOWN:
        String clsName = in.readUTF();
        try {
            Class<? extends Writable> cls = (Class<? extends Writable>) Class.forName(clsName);
            Writable w = (Writable) ReflectionUtils.newInstance(cls, null);
            w.readFields(in);
            return w;
        } catch (RuntimeException re) {
            LOG.info(re.getMessage());
            throw new IOException(re);
        } catch (ClassNotFoundException cnfe) {
            throw new IOException(cnfe);
        }

    default:
        throw new RuntimeException("Unexpected data type " + type + " found in stream.");
    }
}

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From source file:com.iflytek.spider.parse.ParseText.java

public void readFields(DataInput in) throws IOException {
    byte version = in.readByte();
    switch (version) {
    case 1://from w  ww .  j  a v  a2 s .  c o m
        text = WritableUtils.readCompressedString(in);
        break;
    case VERSION:
        text = Text.readString(in);
        break;
    default:
        throw new VersionMismatchException(VERSION, version);
    }
}

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From source file:com.aliyun.openservices.tablestore.hadoop.MultiCriteria.java

@Override
public void readFields(DataInput in) throws IOException {
    byte tag = in.readByte();
    if (tag != WritableConsts.MULTI_CRITERIA) {
        throw new IOException("broken input stream");
    }/*  ww w . j  av a 2 s.c  om*/
    List<RangeRowQueryCriteria> newCriteria = new ArrayList<RangeRowQueryCriteria>();
    int sz = in.readInt();
    for (int i = 0; i < sz; ++i) {
        newCriteria.add(RangeRowQueryCriteriaWritable.read(in).getRangeRowQueryCriteria());
    }
    criteria = newCriteria;
}

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From source file:com.aliyun.openservices.tablestore.hadoop.Endpoint.java

@Override
public void readFields(DataInput in) throws IOException {
    byte tag = in.readByte();
    if (tag != WritableConsts.ENDPOINT) {
        throw new IOException("broken input stream");
    }//from  w  w  w  .  ja  va 2s .co m
    endpoint = null;
    instance = null;
    endpoint = in.readUTF();
    instance = in.readUTF();
}

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