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(Java) Compress String Feed to Base64

This example receives incoming text data in chunks, compresses as a stream, and accumulates the compressed data in base64.

The purpose is to demonstrate the BeginCompressStringENC, MoreCompressStringENC, and EndCompressStringENC methods.

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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Compression UnlockComponent for sample code.

    boolean success;
    CkStringBuilder sbCompressedBase64 = new CkStringBuilder();

    CkCompression compress = new CkCompression();
    compress.put_Algorithm("deflate");
    compress.put_Charset("utf-8");
    compress.put_EncodingMode("base64");

    CkStringBuilder sbIndex = new CkStringBuilder();

    int i;
    for (i = 0; i <= 24; i++) {
        //  Note: It is possible (and normal) for a BeginCompress* or MoreCompress* method to return
        //  an empty string (or 0 bytes).  When this happens, the input data is not lost.  It will be flushed
        //  in a subsequent call.
        sbIndex.Clear();
        sbIndex.AppendInt(i);
        if (i == 0) {
            sbCompressedBase64.Append(compress.beginCompressStringENC(sbIndex.getAsString()));
            }
        else {
            sbCompressedBase64.Append(compress.moreCompressStringENC(sbIndex.getAsString()));
            }

        sbCompressedBase64.Append(compress.moreCompressStringENC(": This is a line of data to be compressed...\r\n"));
        }

    //  Flush any remaining output.
    sbCompressedBase64.Append(compress.endCompressStringENC());

    System.out.println("The base64 encoded compressed text:");
    System.out.println(sbCompressedBase64.getAsString());

    //  Now decompress in one call:
    String originalText = compress.decompressStringENC(sbCompressedBase64.getAsString());
    System.out.println(originalText);
  }
}

 

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