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Apache Commons Compress software defines an API for working with compression and archive formats. These include: bzip2, gzip, pack200, lzma, xz, Snappy, traditional Unix Compress, DEFLATE, DEFLATE64, LZ4, Brotli, Zstandard and ar, cpio, jar, tar, zip, dump, 7z, arj.

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/*
 * DeltaEncoder
 *
 * Author: Lasse Collin 
 *
 * This file has been put into the public domain.
 * You can do whatever you want with this file.
 */

package org.tukaani.xz;

class DeltaEncoder extends DeltaCoder implements FilterEncoder {
    private final DeltaOptions options;
    private final byte[] props = new byte[1];

    DeltaEncoder(DeltaOptions options) {
        props[0] = (byte)(options.getDistance() - 1);
        this.options = (DeltaOptions)options.clone();
    }

    public long getFilterID() {
        return FILTER_ID;
    }

    public byte[] getFilterProps() {
        return props;
    }

    public boolean supportsFlushing() {
        return true;
    }

    public FinishableOutputStream getOutputStream(FinishableOutputStream out,
                                                  ArrayCache arrayCache) {
        return options.getOutputStream(out, arrayCache);
    }
}