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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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package org.jboss.com.sun.corba.se.impl.encoding;
import org.jboss.com.sun.corba.se.impl.orbutil.ORBConstants;
import org.jboss.com.sun.corba.se.spi.ior.iiop.GIOPVersion;
public class CDRInputStream_1_2 extends CDRInputStream_1_1
{
// Indicates whether the header is padded. In GIOP 1.2 and above,/ the body must be aligned on an 8-octet boundary,
// and so the header is padded appropriately. However, if there is no body to a request or reply message, there is
// no header padding, in the unfragmented case.
protected boolean headerPadding;
// used to remember headerPadding flag when mark() and restore() are used.
protected boolean restoreHeaderPadding;
// Called by RequestMessage_1_2 or ReplyMessage_1_2 classes only.
void setHeaderPadding(boolean headerPadding)
{
this.headerPadding = headerPadding;
}
// the mark and reset methods have been overridden to remember the headerPadding flag.
public void mark(int readlimit)
{
super.mark(readlimit);
restoreHeaderPadding = headerPadding;
}
public void reset()
{
super.reset();
headerPadding = restoreHeaderPadding;
restoreHeaderPadding = false;
}
// Template method
// This method has been overriden to ensure that the duplicated stream inherits the headerPadding flag, in case of
// GIOP 1.2 and above, streams.
public CDRInputStreamBase dup()
{
CDRInputStreamBase result = super.dup();
((CDRInputStream_1_2) result).headerPadding = this.headerPadding;
return result;
}
protected void alignAndCheck(int align, int n)
{
// headerPadding bit is set by read method of the RequestMessage_1_2 or ReplyMessage_1_2 classes. When set, the
// very first body read operation (from the stub code) would trigger an alignAndCheck method call, that would in
// turn skip the header padding that was inserted during the earlier write operation by the sender. The padding
// ensures that the body is aligned on an 8-octet boundary, for GIOP versions 1.2 and beyond.
if (headerPadding == true)
{
headerPadding = false;
alignOnBoundary(ORBConstants.GIOP_12_MSG_BODY_ALIGNMENT);
}
checkBlockLength(align, n);
// WARNING: Must compute real alignment after calling checkBlockLength since it may move the position
// In GIOP 1.2, a fragment may end with some alignment padding (which leads to all fragments ending perfectly on
// evenly divisible 8 byte boundaries). A new fragment never requires alignment with the header since it ends on
// an 8 byte boundary.
int alignIncr = computeAlignment(bbwi.position(), align);
bbwi.position(bbwi.position() + alignIncr);
if (bbwi.position() + n > bbwi.buflen)
{
grow(1, n);
}
}
public GIOPVersion getGIOPVersion()
{
return GIOPVersion.V1_2;
}
public char read_wchar()
{
// In GIOP 1.2, a wchar is encoded as an unsigned octet length followed by the octets of the converted wchar.
int numBytes = read_octet();
char[] result = getConvertedChars(numBytes, getWCharConverter());
// Did the provided bytes convert to more than one character? This may come up as more unicode values are
// assigned, and a single 16 bit Java char isn't enough. Better to use strings for i18n purposes.
if (getWCharConverter().getNumChars() > 1)
throw wrapper.btcResultMoreThanOneChar();
return result[0];
}
public String read_wstring()
{
// In GIOP 1.2, wstrings are not terminated by a null. The length is the number of octets in the converted
// format. A zero length string is represented with the 4 byte length value of 0.
int len = read_long();
//
// IMPORTANT: Do not replace 'new String("")' with "", it may result in a Serialization bug (See
// serialization.zerolengthstring) and bug id: 4728756 for details
if (len == 0)
return new String("");
checkForNegativeLength(len);
return new String(getConvertedChars(len, getWCharConverter()), 0, getWCharConverter().getNumChars());
}
}