Java InetAddress readInetAddress(final DataInput in, final boolean fixedLength)

Description

read Inet Address

License

LGPL

Declaration

public static InetAddress readInetAddress(final DataInput in, final boolean fixedLength) throws IOException 

Method Source Code

//package com.java2s;
/*/*from  www. j  a v a 2s. co  m*/
 * Cacheonix Systems licenses this file to You under the LGPL 2.1
 * (the "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *      http://www.cacheonix.org/products/cacheonix/license-lgpl-2.1.htm
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.io.DataInput;
import java.io.DataInputStream;

import java.io.IOException;

import java.net.InetAddress;

public class Main {
    public static InetAddress readInetAddress(final DataInput in, final boolean fixedLength) throws IOException {

        // Read boolean null value marker
        if (in.readBoolean()) {

            // The address is null
            if (fixedLength) {

                // Read padded bytes
                in.readByte();
                in.readLong();
                in.readLong();
            }

            return null;
        }

        // Read the address
        final byte addrLength = in.readByte();
        switch (addrLength) {
        case 4:

            final int address = in.readInt();
            if (fixedLength) {

                // Pad 12 bytes
                in.readInt();
                in.readLong();
            }
            final byte[] addr = new byte[4];
            addr[0] = (byte) (address >>> 24 & 0xFF);
            addr[1] = (byte) (address >>> 16 & 0xFF);
            addr[2] = (byte) (address >>> 8 & 0xFF);
            addr[3] = (byte) (address & 0xFF);
            return InetAddress.getByAddress(addr);
        case 16:

            final byte[] result = new byte[16];
            in.readFully(result);
            return InetAddress.getByAddress(result);
        default:

            throw new IOException("Unknown address format, length: " + addrLength);
        }
    }

    public static Long readLong(final DataInputStream in) throws IOException {

        if (in.readBoolean()) {
            return null;
        }
        return in.readLong();
    }
}

Related

1. inetAddressGt(InetAddress a, InetAddress b)
2. inetAddrToByteArray(InetAddress a)
3. newInterfaceAddress(InetAddress inetAddress, short maskLength)
4. normalizeHostAddress(final InetAddress localHost)
5. parseInetAddressFromString(String input)
6. readInetAddress(final String stringInetAddress)
7. remove(InetAddress[] a_, InetAddress b)
8. removeNull(InetAddress addrs[])
9. serialize(InetAddress endpoint, DataOutput out)