Example usage for org.bouncycastle.cms CMSCompressedDataStreamGenerator CMSCompressedDataStreamGenerator

Introduction

In this page you can find the example usage for org.bouncycastle.cms CMSCompressedDataStreamGenerator CMSCompressedDataStreamGenerator.

Prototype

public CMSCompressedDataStreamGenerator() 

Source Link

Document

base constructor

Usage

From source file:de.mendelson.util.security.BCCryptoHelper.java

/**
 * Compress a data stream//from   ww w .j a  v  a2 s .  c  o  m
 */
public void compressCMS(InputStream uncompressed, OutputStream compressed, boolean inMemory) throws Exception {
    //streamed compression does not work without a stream buffer in bc 1.45 and before
    CMSCompressedDataStreamGenerator generator = new CMSCompressedDataStreamGenerator();
    if (inMemory) {
        ByteArrayOutputStream memBuffer = new ByteArrayOutputStream();
        OutputStream cOut = generator.open(memBuffer, new ZlibCompressor());
        this.copyStreams(uncompressed, cOut);
        cOut.flush();
        cOut.close();
        compressed.write(memBuffer.toByteArray());
    } else {
        File tempFile = File.createTempFile("compress", ".temp");
        FileOutputStream fileBuffer = null;
        try {
            fileBuffer = new FileOutputStream(tempFile);
            OutputStream cOut = generator.open(fileBuffer, new ZlibCompressor());
            this.copyStreams(uncompressed, cOut);
            cOut.flush();
            cOut.close();
        } finally {
            if (fileBuffer != null) {
                fileBuffer.flush();
                fileBuffer.close();
            }
        }
        FileInputStream fileIn = null;
        try {
            fileIn = new FileInputStream(tempFile);
            this.copyStreams(fileIn, compressed);
        } finally {
            if (fileIn != null) {
                fileIn.close();
            }
        }
        boolean deleted = tempFile.delete();
    }
}

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From source file:org.neociclo.odetteftp.util.EnvelopingUtil.java

License:Apache License

public static OutputStream openCompressedDataStreamGenerator(OutputStream outStream) throws IOException {

    CMSCompressedDataStreamGenerator gen = new CMSCompressedDataStreamGenerator();

    OutputStream compressed = gen.open(outStream, CMSCompressedDataGenerator.ZLIB);
    return compressed;

}

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