Package com.oss.util

Class DecompressInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

java.util.zip.InflaterInputStream

com.oss.util.DecompressInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class DecompressInputStream
extends InflaterInputStream

This class class provides the same functionality as the InflaterInputStream but skips the encoding prefix before data decompression.

Since:

ASN.1/Java 5.1.0

Constructor Summary

Constructors

Constructor	Description
DecompressInputStream(InputStream in)	Constructs DecompressInputStream from an InputStream with the default decompressor and buffer size.
DecompressInputStream(InputStream in, Inflater inflater)	Constructs DecompressInputStream from an InputStream with the specified decompressor and default buffer size.
DecompressInputStream(InputStream in, Inflater inflater, int size)	Constructs DecompressInputStream from an InputStream with the specified decompressor and buffer size.

Method Summary

Modifier and Type	Method	Description
int	read(byte[] b, int off, int len)	Reads uncompressed data into an array of bytes.
void	setSizeoflong(int value)	Sets the mSizeoflong to the specified value if the compression have been by ASN1/C tools.

Methods inherited from class java.util.zip.InflaterInputStream

available, close, mark, markSupported, read, reset, skip

Methods inherited from class java.io.FilterInputStream

read

Methods inherited from class java.io.InputStream

nullInputStream, readAllBytes, readNBytes, readNBytes, skipNBytes, transferTo

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DecompressInputStream

public DecompressInputStream(InputStream in,
 Inflater inflater,
 int size)

Constructs DecompressInputStream from an InputStream with the specified decompressor and buffer size.

Parameters:

in - the input stream

inflater - the decompressor

size - the input buffer size

Throws:

IllegalArgumentException - if size is <= 0

DecompressInputStream

public DecompressInputStream(InputStream in,
 Inflater inflater)

Constructs DecompressInputStream from an InputStream with the specified decompressor and default buffer size.

Parameters:

in - the input stream

inflater - the decompressor

DecompressInputStream

public DecompressInputStream(InputStream in)

Constructs DecompressInputStream from an InputStream with the default decompressor and buffer size.

Parameters:

in - the input stream

Method Details

setSizeoflong

public void setSizeoflong(int value)

Sets the mSizeoflong to the specified value if the compression have been by ASN1/C tools.

Parameters:

value - - the sizeof(long)

read

public int read(byte[] b,
 int off,
 int len)
         throws IOException

Reads uncompressed data into an array of bytes. This method will block until some input can be decompressed.

Overrides:

read in class InflaterInputStream

Parameters:

b - the buffer into which the data is read

off - the start offset of the data

len - the maximum number of bytes read

Returns:

the actual number of bytes read, or -1 if the end of the compressed input is reached or a preset dictionary is needed

Throws:

IOException - if an I/O error has occurred