package org.jeecg.modules.dnc.utils;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

public class CompressionUtils {
    public static byte[] gzipCompress(byte[] data) {
        try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
             GZIPOutputStream gzip = new GZIPOutputStream(bos)) {
            gzip.write(data);
            gzip.finish();
            return bos.toByteArray();
        } catch (IOException e) {
            throw new RuntimeException("GZIP压缩失败", e);
        }
    }

    public static byte[] gzipDecompress(byte[] compressed) {
        try (ByteArrayInputStream bis = new ByteArrayInputStream(compressed);
             GZIPInputStream gzip = new GZIPInputStream(bis);
             ByteArrayOutputStream bos = new ByteArrayOutputStream()) {
            byte[] buffer = new byte[1024];
            int len;
            while ((len = gzip.read(buffer)) > 0) {
                bos.write(buffer, 0, len);
            }
            return bos.toByteArray();
        } catch (IOException e) {
            throw new RuntimeException("GZIP解压失败", e);
        }
    }
}