Module ibm.jzos

Package com.ibm.jzos

Interface BufferCompressor

All Known Implementing Classes:

ZCompressor

public interface BufferCompressor

Implementors of the BufferCompressor interface may be used to compress or expand discrete buffers of data.

Since:

2.4.4

See Also:

• CompressionFactory

Method Summary

Modifier and Type	Method	Description
int	compressBuffer(byte[] output, int outoff, byte[] input, int inoff, int inlen)	Compress a discrete buffer.
int	expandBuffer(byte[] output, int outoff, byte[] input, int inoff, int inlen)	Expand a discrete buffer.

Method Details

compressBuffer

int compressBuffer(byte[] output,
 int outoff,
 byte[] input,
 int inoff,
 int inlen)
            throws RuntimeException

Compress a discrete buffer.

Parameters:

output - output buffer that will hold the compressed data

outoff - offset into the output buffer to write the compressed data

input - input buffer containing the data to be compressed

inoff - offset into the input buffer

inlen - the size of the data to be compressed

Returns:

If the entire input buffer was compressed, this method returns the number of bytes used in the compressed output buffer, including the last partial byte (if any). If the entire input buffer could not be compressed into the given output buffer, this method returns a negative integer. This is an error, indicating that the request must be retried completely with a larger output buffer.

Throws:

RuntimeException - depending on the implementation

expandBuffer

int expandBuffer(byte[] output,
 int outoff,
 byte[] input,
 int inoff,
 int inlen)
          throws RuntimeException

Expand a discrete buffer.

Parameters:

output - output buffer that will hold the expanded data

outoff - offset into the output buffer to write the expanded data

input - input buffer containing the data to be expanded

inoff - offset into the input buffer

inlen - the size of the data to be expanded

Returns:

If the entire input buffer was expanded, this method returns the number of bytes used in the expanded output buffer. If the entire input buffer could not be expanded into the given output buffer, this method returns a negative integer. This is an error, indicating that the request must be retried completely with a larger output buffer.

Throws:

RuntimeException - depending on the implementation