oracle.security.crypto.cms

Class CMSCompressedDataInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

oracle.security.crypto.cms.CMSInputStream

oracle.security.crypto.cms.CMSCompressedDataInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class CMSCompressedDataInputStream
extends CMSInputStream

A CMSCompressedDataInputStream is used to read compressed-data CMS objects.

A CMSCompressedDataInputStream is essentially a input stream filter that unwraps the CMS compressed-data structure from the data read in.

You will be able to read a detached digested-data object using the CMSCompressedDataInputStream class but you will not be able to verify the digest.

IMPORTANT: This class processes large CMS compressed-data Objects more efficiently (Java VM memory usage) than the CMSCompressedDataContentInfo class.

See Also:

CMSInputConnector, CMSCompressedDataInputConnector, CMSCompressedDataContentInfo

Field Summary

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Constructors

Constructor and Description
CMSCompressedDataInputStream(CMSInputConnector conn) Creates a CMSCompressedDataInputStream.
CMSCompressedDataInputStream(java.io.InputStream in) Creates a CMSCompressedDataInputStream.

Method Summary

Modifier and Type	Method and Description
int	available()
AlgorithmIdentifier	getCompressionAlgID() Returns the message compressed algorithm.
ASN1ObjectID	getEnclosedContentType() Returns the content type of the digested content.
ASN1Integer	getVersion() Deprecated. As of Phaos CMS 2.0.1, replaced by getVersionNumber()
java.math.BigInteger	getVersionNumber() Returns the version number of this CMS Object.
void	mark(int readlimit) Not supported.
boolean	markSupported() Always returns false.
int	read()
int	read(byte[] buffer, int offset, int len)
void	reset() Not supported.
long	skip(long n)
void	terminate() Finish reading the digested-data structure.

Methods inherited from class java.io.FilterInputStream

close, read

Methods inherited from class java.lang.Object

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

Constructor Detail

CMSCompressedDataInputStream

public CMSCompressedDataInputStream(java.io.InputStream in)

Creates a CMSCompressedDataInputStream.

Parameters:

in - The underlying input stream.

CMSCompressedDataInputStream

public CMSCompressedDataInputStream(CMSInputConnector conn)

Creates a CMSCompressedDataInputStream.

Parameters:

conn - The underlying input connector.

Method Detail

terminate

public void terminate()
               throws java.io.IOException

Finish reading the digested-data structure.

Invoke this method only after all the underlying content has been read.

Specified by:

terminate in class CMSInputStream

Throws:

java.io.IOException - An I/O error occurred or some of the underlying content is still present in the input stream.

getVersionNumber

public java.math.BigInteger getVersionNumber()
                                      throws java.io.IOException

Returns the version number of this CMS Object.

Returns:

The version number.

Throws:

java.io.IOException - An I/O error occurred or the input is incorrectly encoded.

getVersion

public ASN1Integer getVersion()
                       throws java.io.IOException

Deprecated. As of Phaos CMS 2.0.1, replaced by getVersionNumber()

Returns the version number of this CMS Object.

Returns:

The version number.

Throws:

java.io.IOException - An I/O error occurred or the input is incorrectly encoded.

getCompressionAlgID

public AlgorithmIdentifier getCompressionAlgID()
                                        throws java.io.IOException

Returns the message compressed algorithm.

Returns:

The compressed algorithm identifier.

Throws:

java.io.IOException - An I/O error occurred or the input is incorrectly encoded.

getEnclosedContentType

public ASN1ObjectID getEnclosedContentType()
                                    throws java.io.IOException

Returns the content type of the digested content.

Specified by:

getEnclosedContentType in class CMSInputStream

Returns:

The content type identifier.

Throws:

java.io.IOException - An I/O error occurred or no input has been read.

read

public int read()
         throws java.io.IOException

Overrides:

read in class java.io.FilterInputStream

Throws:

java.io.IOException

read

public int read(byte[] buffer,
                int offset,
                int len)
         throws java.io.IOException

Overrides:

read in class java.io.FilterInputStream

Throws:

java.io.IOException

available

public int available()
              throws java.io.IOException

Overrides:

available in class java.io.FilterInputStream

Throws:

java.io.IOException

skip

public long skip(long n)
          throws java.io.IOException

Overrides:

skip in class java.io.FilterInputStream

Throws:

java.io.IOException

markSupported

public boolean markSupported()

Always returns false.

Overrides:

markSupported in class java.io.FilterInputStream

Returns:

false (not supported)

mark

public void mark(int readlimit)

Not supported.

Overrides:

mark in class java.io.FilterInputStream

reset

public void reset()
           throws java.io.IOException

Not supported.

Overrides:

reset in class java.io.FilterInputStream

Throws:

java.io.IOException - always(not supported)