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.fiorano.openesb.application.DmiObject.java

/**
 * Utility method to read a list from input stream
 * @param list list/*from  ww  w .  j  a  va  2  s .c om*/
 * @param dmiType type of dmi object
 * @param in input stream
 * @param versionNo version
 * @throws IOException IOException
 */
public static void fromStream(List list, int dmiType, DataInput in, int versionNo) throws IOException {
    try {
        int size = in.readInt();
        for (int i = 0; i < size; i++) {
            DmiObject dmi = DmiObject.getDatamodelObject(dmiType);
            dmi.fromStream(in, versionNo);
            list.add(dmi);
        }
    } catch (FioranoException ex) {
        throw (IOException) new IOException().initCause(ex);
    }
}

From source file:org.apache.marmotta.kiwi.io.KiWiIO.java

/**
 * Read a potentially compressed string from the data input.
 *
 * @param in//from ww  w . ja  v a2s . co  m
 * @return
 * @throws IOException
 */
private static String readContent(DataInput in) throws IOException {
    int mode = in.readByte();

    if (mode == MODE_COMPRESSED) {
        try {
            int strlen = in.readInt();
            int buflen = in.readInt();

            byte[] buffer = new byte[buflen];
            in.readFully(buffer);

            Inflater decompressor = new Inflater(true);
            decompressor.setInput(buffer);

            byte[] data = new byte[strlen];
            decompressor.inflate(data);
            decompressor.end();

            return new String(data, "UTF-8");
        } catch (DataFormatException ex) {
            throw new IllegalStateException("input data is not valid", ex);
        }
    } else {
        return DataIO.readString(in);
    }
}

From source file:org.apache.hadoop.hbase.security.access.PermissionStorage.java

public static ListMultimap<String, Permission> readPermissions(byte[] data, Configuration conf)
        throws DeserializationException {
    if (ProtobufUtil.isPBMagicPrefix(data)) {
        int pblen = ProtobufUtil.lengthOfPBMagic();
        try {// w  w w  . j ava 2s  . co  m
            AccessControlProtos.UsersAndPermissions.Builder builder = AccessControlProtos.UsersAndPermissions
                    .newBuilder();
            ProtobufUtil.mergeFrom(builder, data, pblen, data.length - pblen);
            return AccessControlUtil.toPermission(builder.build());
        } catch (IOException e) {
            throw new DeserializationException(e);
        }
    } else {
        // TODO: We have to re-write non-PB data as PB encoded. Otherwise we will carry old Writables
        // forever (here and a couple of other places).
        ListMultimap<String, Permission> perms = ArrayListMultimap.create();
        try {
            DataInput in = new DataInputStream(new ByteArrayInputStream(data));
            int length = in.readInt();
            for (int i = 0; i < length; i++) {
                String user = Text.readString(in);
                perms.putAll(user, readWritableUserPermission(in, conf));
            }
        } catch (IOException | ClassNotFoundException e) {
            throw new DeserializationException(e);
        }
        return perms;
    }
}

From source file:org.apache.hadoop.hbase.security.access.PermissionStorage.java

@VisibleForTesting
public static ListMultimap<String, UserPermission> readUserPermission(byte[] data, Configuration conf)
        throws DeserializationException {
    if (ProtobufUtil.isPBMagicPrefix(data)) {
        int pblen = ProtobufUtil.lengthOfPBMagic();
        try {//from w  w  w .j  a v  a 2  s  . c  o m
            AccessControlProtos.UsersAndPermissions.Builder builder = AccessControlProtos.UsersAndPermissions
                    .newBuilder();
            ProtobufUtil.mergeFrom(builder, data, pblen, data.length - pblen);
            return AccessControlUtil.toUserPermission(builder.build());
        } catch (IOException e) {
            throw new DeserializationException(e);
        }
    } else {
        // TODO: We have to re-write non-PB data as PB encoded. Otherwise we will carry old Writables
        // forever (here and a couple of other places).
        ListMultimap<String, UserPermission> userPermission = ArrayListMultimap.create();
        try {
            DataInput in = new DataInputStream(new ByteArrayInputStream(data));
            int length = in.readInt();
            for (int i = 0; i < length; i++) {
                String user = Text.readString(in);
                List<Permission> perms = readWritableUserPermission(in, conf);
                for (Permission p : perms) {
                    userPermission.put(user, new UserPermission(user, p));
                }
            }
        } catch (IOException | ClassNotFoundException e) {
            throw new DeserializationException(e);
        }
        return userPermission;
    }
}

From source file:org.apache.hadoop.hbase.security.access.PermissionStorage.java

private static List<Permission> readWritableUserPermission(DataInput in, Configuration conf)
        throws IOException, ClassNotFoundException {
    assert WritableUtils.readVInt(in) == LIST_CODE;
    int length = in.readInt();
    List<Permission> list = new ArrayList<>(length);
    for (int i = 0; i < length; i++) {
        assert WritableUtils.readVInt(in) == WRITABLE_CODE;
        assert WritableUtils.readVInt(in) == WRITABLE_NOT_ENCODED;
        String className = Text.readString(in);
        Class<? extends Writable> clazz = conf.getClassByName(className).asSubclass(Writable.class);
        Writable instance = WritableFactories.newInstance(clazz, conf);
        instance.readFields(in);//from  w  ww  .j  av a 2s  .  com
        list.add((Permission) instance);
    }
    return list;
}

From source file:org.apache.marmotta.kiwi.io.KiWiIO.java

/**
 * Read a KiWiDateLiteral serialized with writeDateLiteral from a DataInput source
 *
 * @param input the source//from  w  w w  .ja  v a  2  s .  com
 * @return the de-serialized KiWiDateLiteral
 * @throws IOException
 */
public static KiWiDateLiteral readDateLiteral(DataInput input) throws IOException {
    long id = input.readLong();

    if (id == -1) {
        return null;
    } else {
        DateTime content = new DateTime(input.readLong(), DateTimeZone.forOffsetMillis(input.readInt()));

        KiWiUriResource dtype = readURI(input);

        Date created = new Date(input.readLong());

        KiWiDateLiteral r = new KiWiDateLiteral(content, dtype, created);
        r.setId(id);

        return r;
    }
}

From source file:org.apache.eagle.alert.engine.serialization.impl.JavaObjectSerializer.java

@Override
public Object deserialize(DataInput dataInput) throws IOException {
    int len = dataInput.readInt();
    byte[] bytes = new byte[len];
    dataInput.readFully(bytes);/* w w w  .  ja v  a2  s .c  o m*/
    return SerializationUtils.deserialize(bytes);
}

From source file:edu.iu.lda.TopicCountList.java

@Override
public void read(DataInput in) throws IOException {
    int size = in.readInt();
    for (int i = 0; i < size; i++) {
        topicCount.add(in.readLong());//from w w  w.  j ava2s.  com
    }
    topicCount.trim();
}

From source file:org.apache.sqoop.mapreduce.netezza.NetezzaExternalTableInputSplit.java

@Override
public void readFields(DataInput input) throws IOException {
    dataSliceId = input.readInt();
}

From source file:edu.iu.lda.TopicCount.java

@Override
public void read(DataInput in) throws IOException {
    int size = in.readInt();
    for (int i = 0; i < size; i++) {
        topicCount.put(in.readInt(), in.readInt());
    }/*from   ww w . j  av a  2  s .  c  o  m*/
    topicCount.trim();
}