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jlechner |
/* EncapsulationOutput.java --
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Copyright (C) 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.CORBA.CDR;
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import java.io.IOException;
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/**
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* The encapsulated data, as they are defined by CORBA specification.
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* This includes the extra 0 byte (Big endian) in the beginning.
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* When written to the parent steam, the encapsulated data are preceeded
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* by the data length in bytes.
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*
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* @author Audrius Meskauskas (AudriusA@Bioinformatics.org)
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*/
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public class EncapsulationStream
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extends AbstractCdrOutput
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{
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/**
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* The Big Endian (most siginificant byte first flag).
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*/
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public static final byte BIG_ENDIAN = 0;
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/**
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* The Little Endian (least siginificant byte first flag).
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*/
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public static final byte LITTLE_ENDIAN = 1;
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/**
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* The byte buffer.
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*/
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public final AligningOutput buffer;
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/**
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* The stream, where the data are being encapsulated.
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*/
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public final org.omg.CORBA.portable.OutputStream parent;
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/**
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* Create the EncapsulationOutput with the given parent stream
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* and the specified encoding.
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*/
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public EncapsulationStream(org.omg.CORBA.portable.OutputStream _parent,
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boolean use_big_endian)
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{
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super();
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buffer = new AligningOutput();
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setOutputStream(buffer);
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parent = _parent;
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write(use_big_endian?BIG_ENDIAN:LITTLE_ENDIAN);
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}
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/**
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* Set the alignment offset, if the index of the first byte in the
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* stream is different from 0.
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*/
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public void setOffset(int an_offset)
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{
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buffer.setOffset(an_offset);
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}
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/**
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* Align the curretn position at the given natural boundary.
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*/
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public void align(int boundary)
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{
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buffer.align(boundary);
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}
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/**
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* Writes the content of the encapsulated output into the parent
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* buffer.
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*/
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public void close()
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{
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try
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{
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parent.write_long(buffer.size());
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buffer.writeTo(parent);
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}
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catch (IOException ex)
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{
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InternalError err = new InternalError();
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err.initCause(ex);
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throw err;
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}
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}
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/**
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* Return the input stream that reads the previously written values.
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*/
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public org.omg.CORBA.portable.InputStream create_input_stream()
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{
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BufferredCdrInput in = new BufferredCdrInput(buffer.toByteArray());
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in.setOrb(orb);
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in.setVersion(giop);
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in.setCodeSet(getCodeSet());
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return in;
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}
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/**
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* Resets (clears) the buffer.
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*/
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public void reset()
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{
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buffer.reset();
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setOutputStream(buffer);
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}
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}
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