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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. The APIs are designed primarily to be used in conjunction with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified.

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package org.bouncycastle.operator;

import java.io.OutputStream;

import org.bouncycastle.asn1.x509.AlgorithmIdentifier;

/**
 * General interface for an operator that is able to produce
 * an OutputStream that will output compressed data.
 */
public interface OutputCompressor
{
    /**
     * Return the algorithm identifier describing the compression
     * algorithm and parameters this compressor uses.
     *
     * @return algorithm oid and parameters.
     */
    AlgorithmIdentifier getAlgorithmIdentifier();

    /**
     * Wrap the passed in output stream comOut, returning an output stream
     * that compresses anything passed in before sending on to comOut.
     *
     * @param comOut output stream for compressed output.
     * @return a compressing OutputStream
     */
    OutputStream getOutputStream(OutputStream comOut);
}