com.alachisoft.ncache.serialization.standard.io.surrogates.BigIntegerSerializationSurrogate Maven / Gradle / Ivy

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Internal package of Alachisoft.
There is a newer version: 5.3.3
/*
 * @(#)BigIntegerSerializationSurrogate.java	1.0
 *
 * Created on September 18, 2008, 12:59 PM
 *
 * Copyright 2008 NeXtreme Innovations, Inc. All rights reserved.
 * "NeXtreme Innovations" PROPRIETARY/CONFIDENTIAL. Use is subject
 * to license terms.
 */
package com.alachisoft.ncache.serialization.standard.io.surrogates;

import com.alachisoft.ncache.serialization.core.io.NCacheObjectInput;
import com.alachisoft.ncache.serialization.core.io.NCacheObjectOutput;
import com.alachisoft.ncache.serialization.core.io.surrogates.*;

import java.io.IOException;
import java.math.BigInteger;

/**
 * BigIntegerSerializationSurrogate is responsible for writing and reading
 * instances of BitInteger class.
 *
 * @version 1.0, September 18, 2008
 */
public class BigIntegerSerializationSurrogate extends SerializationSurrogateBase implements SerializationSurrogate, BuiltinSerializationSurrogate {

    /**
     * Creates a new instance of BigIntegerSerializationSurrogate
     */
    public BigIntegerSerializationSurrogate() {
        super(BigInteger.class);
    }

    /**
     * Read and return an object. The class that implements this interface
     * defines where the object is "read" from.
     *
     * @param input the stream to read data from in order to restore the object.
     * @return the object read from the stream
     * @throws java.lang.ClassNotFoundException If the class of a serialized
     *                                          object cannot be found.
     * @throws NCacheIOException                If any of the usual Input/Output
     *                                          related exceptions occur.
     */
    public Object readObject(NCacheObjectInput input)
            throws NCacheInstantiationException, NCacheIOException {
        try {
            int len = input.readInt();
            byte[] bytes = new byte[len];
            input.readFully(bytes);

            return new BigInteger(bytes);
        } catch (IOException ex) {
            throw new NCacheIOException(ex);
        }
    }

    /**
     * Write an object to the underlying storage or stream.  The
     * class that implements this interface defines how the object is
     * written.
     *
     * @param output the stream to write the object to.
     * @param graph  the object to write .
     * @throws NCacheIOException Any of the usual Input/Output related exceptions.
     */
    public void writeObject(NCacheObjectOutput output, Object graph)
            throws NCacheIOException {
        try {
            BigInteger i = (BigInteger) graph;
            byte[] bits = i.toByteArray();

            output.writeInt(bits.length);
            output.write(bits);
        } catch (IOException ex) {
            throw new NCacheIOException(ex);
        }
    }

    public void skipObject(NCacheObjectInput input) throws NCacheInstantiationException, NCacheIOException {
        try {
            int len = input.readInt();
            input.skipBytes(len);
        } catch (IOException ex) {
            throw new NCacheIOException(ex);
        }
    }
}