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java.lang.Objectjava.io.OutputStream
net.rim.device.api.crypto.cms.CMSOutputStream
net.rim.device.api.crypto.cms.CMSCompressedDataOutputStream
public final class CMSCompressedDataOutputStream
Implements a CMS Compressed data output stream so that outgoing data can be compressed and formatted as per CMS compressed data messages.
CMSCompressedDataInputStream
Field Summary | ||
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static int |
ZLIB_COMPRESSION
A constant representing the ZLIB form of compression. |
Fields inherited from class net.rim.device.api.crypto.cms.CMSOutputStream |
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_contentType, _dataOut, _out, _outer |
Constructor Summary | ||
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CMSCompressedDataOutputStream(OutputStream out,
int contentType,
boolean outer)
Creates a compressed data output stream using ZLIB_COMPRESSION. |
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CMSCompressedDataOutputStream(OutputStream out,
int contentType,
int compressionType,
boolean outer)
Creates a compressed data output stream. |
Method Summary | ||
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void |
close()
Closes this output stream and releases any system resources associated with this stream. |
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void |
write(byte[] data,
int offset,
int length)
Writes len bytes from the specified byte array
starting at offset off to this output stream. |
Methods inherited from class net.rim.device.api.crypto.cms.CMSOutputStream |
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flush, write, write |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final int ZLIB_COMPRESSION
Constructor Detail |
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public CMSCompressedDataOutputStream(OutputStream out, int contentType, boolean outer)
out
- The output stream to write data too.contentType
- The type of data being compressed.outer
- A boolean to determine if this is the outer CMS stream, since CMS streams
can be nested within themselves. The stream needs to know if it is the "outer" layer so it can do some extra
processing. For example, if you wish to sign and then encrypt a message, the CMSSignedDataOutputStream will
be the "outer" layer.public CMSCompressedDataOutputStream(OutputStream out, int contentType, int compressionType, boolean outer)
out
- The output stream to write data too.contentType
- The type of data being compressed.compressionType
- an integer constant representing the compression type to use.
Note that only ZLIB_COMPRESSION
is currently supported.outer
- A boolean to determine if this is the outer CMS stream, since CMS streams
can be nested within themselves. The stream needs to know if it is the "outer" layer so it can do some extra
processing. For example, if you wish to sign and then encrypt a message, the CMSSignedDataOutputStream will
be the "outer" layer.Method Detail |
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public void write(byte[] data, int offset, int length) throws IOException
OutputStream
len
bytes from the specified byte array
starting at offset off
to this output stream.
The general contract for write(b, off, len)
is that
some of the bytes in the array b
are written to the
output stream in order; element b[off]
is the first
byte written and b[off+len-1]
is the last byte written
by this operation.
The write
method of OutputStream
calls
the write method of one argument on each of the bytes to be
written out. Subclasses are encouraged to override this method and
provide a more efficient implementation.
If b
is null
, a
NullPointerException
is thrown.
If off
is negative, or len
is negative, or
off+len
is greater than the length of the array
b
, then an IndexOutOfBoundsException is thrown.
write
in class CMSOutputStream
data
- the data.offset
- the start offset in the data.length
- the number of bytes to write.
IOException
- if an I/O error occurs. In particular,
an IOException
is thrown if the output
stream is closed.public void close() throws IOException
OutputStream
close
is that it closes the output stream. A closed stream cannot perform
output operations and cannot be reopened.
The close
method of OutputStream
does nothing.
close
in class CMSOutputStream
IOException
- if an I/O error occurs.
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