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The Bouncy Castle Java API for handling the OpenPGP protocol. This jar contains the OpenPGP API for JDK 1.5 to JDK 1.7. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.bcpg;

import java.io.IOException;

/**
 * generic compressed data object.
 */
public class CompressedDataPacket 
    extends InputStreamPacket
{
    int    algorithm;
    
    CompressedDataPacket(
        BCPGInputStream    in)
        throws IOException
    {
        super(in);
        
        algorithm = in.read();    
    }
    
    /**
     * return the algorithm tag value.
     * 
     * @return algorithm tag value.
     */
    public int getAlgorithm()
    {
        return algorithm;
    }
}