/*
* Copyright 2000-2003 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* 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).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package com.sun.corba.se.impl.encoding;
import com.sun.corba.se.spi.ior.iiop.GIOPVersion;
public class CDRInputStream_1_1 extends CDRInputStream_1_0
{
// See notes in CDROutputStream
protected int fragmentOffset = 0;
public GIOPVersion getGIOPVersion() {
return GIOPVersion.V1_1;
}
// Template method
public CDRInputStreamBase dup() {
CDRInputStreamBase result = super.dup();
((CDRInputStream_1_1)result).fragmentOffset = this.fragmentOffset;
return result;
}
protected int get_offset() {
return bbwi.position() + fragmentOffset;
}
protected void alignAndCheck(int align, int n) {
checkBlockLength(align, n);
// WARNING: Must compute real alignment after calling
// checkBlockLength since it may move the position
int alignment = computeAlignment(bbwi.position(), align);
if (bbwi.position() + n + alignment > bbwi.buflen) {
// Some other ORBs may have found a way to send 1.1
// fragments which put alignment bytes at the end
// of a fragment
if (bbwi.position() + alignment == bbwi.buflen)
{
bbwi.position(bbwi.position() + alignment);
}
grow(align, n);
// We must recalculate the alignment after a possible
// fragmentation since the new bbwi.position() (after the header)
// may require a different alignment.
alignment = computeAlignment(bbwi.position(), align);
}
bbwi.position(bbwi.position() + alignment);
}
//
// This can be overridden....
//
protected void grow(int align, int n) {
bbwi.needed = n;
// Save the size of the current buffer for
// possible fragmentOffset calculation
int oldSize = bbwi.position();
bbwi = bufferManagerRead.underflow(bbwi);
if (bbwi.fragmented) {
// By this point we should be guaranteed to have
// a new fragment whose header has already been
// unmarshalled. bbwi.position() should point to the
// end of the header.
fragmentOffset += (oldSize - bbwi.position());
markAndResetHandler.fragmentationOccured(bbwi);
// Clear the flag
bbwi.fragmented = false;
}
}
// Mark/reset ---------------------------------------
private class FragmentableStreamMemento extends StreamMemento
{
private int fragmentOffset_;
public FragmentableStreamMemento()
{
super();
fragmentOffset_ = fragmentOffset;
}
}
public java.lang.Object createStreamMemento() {
return new FragmentableStreamMemento();
}
public void restoreInternalState(java.lang.Object streamMemento)
{
super.restoreInternalState(streamMemento);
fragmentOffset
= ((FragmentableStreamMemento)streamMemento).fragmentOffset_;
}
// --------------------------------------------------
public char read_wchar() {
// In GIOP 1.1, interoperability with wchar is limited
// to 2 byte fixed width encodings. CORBA formal 99-10-07 15.3.1.6.
// WARNING: For UTF-16, this means that there can be no
// byte order marker, so it must default to big endian!
alignAndCheck(2, 2);
// Because of the alignAndCheck, we should be guaranteed
// 2 bytes of real data.
char[] result = getConvertedChars(2, 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 1.1, interoperability with wchar is limited
// to 2 byte fixed width encodings. CORBA formal 99-10-07 15.3.1.6.
int len = read_long();
// Workaround for ORBs which send string lengths of
// zero to mean empty string.
//
// 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);
// Don't include the two byte null for the
// following computations. Remember that since we're limited
// to a 2 byte fixed width code set, the "length" was the
// number of such 2 byte code points plus a 2 byte null.
len = len - 1;
char[] result = getConvertedChars(len * 2, getWCharConverter());
// Skip over the 2 byte null
read_short();
return new String(result, 0, getWCharConverter().getNumChars());
}
}
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