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author | Benoit Foucher <benoit@zeroc.com> | 2009-03-24 11:45:18 +0100 |
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committer | Benoit Foucher <benoit@zeroc.com> | 2009-03-24 11:45:18 +0100 |
commit | 06a08ecf28e205277336a97a6173db7ccbed1adc (patch) | |
tree | a369a5044a63f8cdba9e7c0a461e24ae344486b4 /java/src/IceInternal/OutputStreamWrapper.java | |
parent | Merge branch 'R3_3_branch' (diff) | |
parent | Bug 3924: slice2py missing from VC60 installer (diff) | |
download | ice-06a08ecf28e205277336a97a6173db7ccbed1adc.tar.bz2 ice-06a08ecf28e205277336a97a6173db7ccbed1adc.tar.xz ice-06a08ecf28e205277336a97a6173db7ccbed1adc.zip |
Merge commit 'origin/R3_3_branch'
Conflicts:
CHANGES
cpp/demo/Freeze/backup/.depend
cpp/demo/Freeze/bench/.depend
cpp/demo/Freeze/casino/.depend
cpp/demo/Freeze/customEvictor/.depend
cpp/demo/Freeze/library/.depend
cpp/demo/Freeze/phonebook/.depend
cpp/demo/Freeze/transform/.depend
cpp/demo/Glacier2/callback/.depend
cpp/demo/Glacier2/chat/.depend
cpp/demo/Ice/async/.depend
cpp/demo/Ice/bidir/.depend
cpp/demo/Ice/callback/.depend
cpp/demo/Ice/converter/.depend
cpp/demo/Ice/hello/.depend
cpp/demo/Ice/invoke/.depend
cpp/demo/Ice/latency/.depend
cpp/demo/Ice/minimal/.depend
cpp/demo/Ice/multicast/.depend
cpp/demo/Ice/nested/.depend
cpp/demo/Ice/nrvo/.depend
cpp/demo/Ice/session/.depend
cpp/demo/Ice/throughput/.depend
cpp/demo/Ice/value/.depend
cpp/demo/IceBox/hello/.depend
cpp/demo/IceGrid/allocate/.depend
cpp/demo/IceGrid/icebox/.depend
cpp/demo/IceGrid/replication/.depend
cpp/demo/IceGrid/sessionActivation/.depend
cpp/demo/IceGrid/simple/.depend
cpp/demo/IceStorm/clock/.depend
cpp/demo/IceStorm/counter/.depend
cpp/demo/IceStorm/replicated/.depend
cpp/demo/IceStorm/replicated2/.depend
cpp/demo/book/freeze_filesystem/.depend
cpp/demo/book/lifecycle/.depend
cpp/demo/book/printer/.depend
cpp/demo/book/simple_filesystem/.depend
cpp/src/Freeze/.depend
cpp/src/FreezeScript/.depend
cpp/src/Ice/.depend
cpp/src/Ice/UdpTransceiver.cpp
cpp/src/Ice/UdpTransceiver.h
cpp/src/IceBox/.depend
cpp/src/IceGrid/.depend
cpp/src/IceGridLib/.depend
cpp/src/IcePatch2/.depend
cpp/src/IceStorm/.depend
cpp/src/slice2freeze/.depend
cpp/test/Freeze/complex/.depend
cpp/test/Freeze/dbmap/.depend
cpp/test/Freeze/evictor/.depend
cpp/test/Freeze/oldevictor/.depend
cpp/test/FreezeScript/dbmap/.depend
cpp/test/FreezeScript/evictor/.depend
cpp/test/Glacier2/attack/.depend
cpp/test/Glacier2/dynamicFiltering/.depend
cpp/test/Glacier2/router/.depend
cpp/test/Glacier2/sessionControl/.depend
cpp/test/Glacier2/ssl/.depend
cpp/test/Glacier2/staticFiltering/.depend
cpp/test/Ice/adapterDeactivation/.depend
cpp/test/Ice/background/.depend
cpp/test/Ice/binding/.depend
cpp/test/Ice/checksum/.depend
cpp/test/Ice/checksum/server/.depend
cpp/test/Ice/custom/.depend
cpp/test/Ice/exceptions/.depend
cpp/test/Ice/facets/.depend
cpp/test/Ice/faultTolerance/.depend
cpp/test/Ice/gc/.depend
cpp/test/Ice/hold/.depend
cpp/test/Ice/inheritance/.depend
cpp/test/Ice/interceptor/.depend
cpp/test/Ice/location/.depend
cpp/test/Ice/objects/.depend
cpp/test/Ice/operations/.depend
cpp/test/Ice/proxy/.depend
cpp/test/Ice/retry/.depend
cpp/test/Ice/servantLocator/.depend
cpp/test/Ice/slicing/exceptions/.depend
cpp/test/Ice/slicing/objects/.depend
cpp/test/Ice/stream/.depend
cpp/test/Ice/stringConverter/.depend
cpp/test/Ice/timeout/.depend
cpp/test/Ice/udp/.depend
cpp/test/IceBox/configuration/.depend
cpp/test/IceGrid/activation/.depend
cpp/test/IceGrid/allocation/.depend
cpp/test/IceGrid/deployer/.depend
cpp/test/IceGrid/distribution/.depend
cpp/test/IceGrid/replicaGroup/.depend
cpp/test/IceGrid/replication/.depend
cpp/test/IceGrid/session/.depend
cpp/test/IceGrid/simple/.depend
cpp/test/IceGrid/update/.depend
cpp/test/IceSSL/configuration/.depend
cpp/test/IceStorm/federation/.depend
cpp/test/IceStorm/federation2/.depend
cpp/test/IceStorm/rep1/.depend
cpp/test/IceStorm/repgrid/.depend
cpp/test/IceStorm/repstress/.depend
cpp/test/IceStorm/single/.depend
cpp/test/IceStorm/stress/.depend
cpp/test/Slice/keyword/.depend
cs/src/Ice/Instance.cs
cs/src/IceSSL/ConnectorI.cs
java/demo/book/simple_filesystem/Filesystem/DirectoryI.java
java/demo/book/simple_filesystem/Filesystem/FileI.java
java/src/IceInternal/TcpConnector.java
java/src/IceSSL/ConnectorI.java
py/modules/IcePy/.depend
rb/src/IceRuby/.depend
Diffstat (limited to 'java/src/IceInternal/OutputStreamWrapper.java')
-rw-r--r-- | java/src/IceInternal/OutputStreamWrapper.java | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/java/src/IceInternal/OutputStreamWrapper.java b/java/src/IceInternal/OutputStreamWrapper.java new file mode 100644 index 00000000000..471eef7358c --- /dev/null +++ b/java/src/IceInternal/OutputStreamWrapper.java @@ -0,0 +1,173 @@ +// ********************************************************************** +// +// Copyright (c) 2003-2008 ZeroC, Inc. All rights reserved. +// +// This copy of Ice is licensed to you under the terms described in the +// ICE_LICENSE file included in this distribution. +// +// ********************************************************************** + +package IceInternal; + +import java.io.*; + +// +// Class to provide a java.io.OutputStream on top of a BasicStream. +// We use this to serialize arbitrary Java serializable classes into +// +// Slice sequences are encoded on the wire as a count of elements, followed +// by the sequence contents. For arbitrary Java classes, we do not know how +// big the sequence that is eventually written will be. To avoid excessive +// data copying, this class mantains a private _bytes array of 254 bytes and, +// initially, writes data into that array. If more than 254 bytes end up being +// written, we write a dummy sequence size of 255 (which occupies five bytes +// on the wire) into the BasicStream and, once this stream is closed, patch +// that size to match the actual size. Otherwise, if the _bytes buffer contains +// fewer than 255 bytes when this stream is closed, we write the sequence size +// as a single byte, followed by the contents of the _bytes buffer. +// + +public class OutputStreamWrapper extends java.io.OutputStream +{ + public + OutputStreamWrapper(BasicStream s) + { + _s = s; + _spos = s.pos(); + _bytes = new byte[254]; + _pos = 0; + } + + public void + write(int b) throws IOException + { + try + { + if(_bytes != null) + { + // + // If we can fit the data into the first 254 bytes, write it to _bytes. + // + if(_pos < _bytes.length) + { + _bytes[_pos++] = (byte)b; + return; + } + + _s.writeSize(255); // Dummy size, until we know how big the stream + // really is and can patch the size. + + if(_pos > 0) + { + // + // Write the current contents of _bytes. + // + _s.expand(_pos); + _s.getBuffer().b.put(_bytes, 0, _pos); + } + _bytes = null; + } + + // + // Write data passed by caller. + // + _s.expand(1); + _s.getBuffer().b.put((byte)b); + _pos += 1; + } + catch(java.lang.Exception ex) + { + throw new IOException(ex.toString()); + } + } + + public void + write(byte[] b) throws IOException + { + write(b, 0, b.length); + } + + public void + write(byte[] bytes, int offset, int count) throws IOException + { + try + { + if(_bytes != null) + { + // + // If we can fit the data into the first 254 bytes, write it to _bytes. + // + if(count <= _bytes.length - _pos) + { + System.arraycopy(bytes, offset, _bytes, _pos, count); + _pos += count; + return; + } + + _s.writeSize(255); // Dummy size, until we know how big the stream + // really is and can patch the size. + + if(_pos > 0) + { + // + // Write the current contents of _bytes. + // + _s.expand(_pos); + _s.getBuffer().b.put(_bytes, 0, _pos); + } + _bytes = null; + } + + // + // Write data passed by caller. + // + _s.expand(count); + _s.getBuffer().b.put(bytes, offset, count); + _pos += count; + } + catch(java.lang.Exception ex) + { + throw new IOException(ex.toString()); + } + } + + public void + flush() throws IOException + { + // This does nothing because we do not know the final size of a writable stream until it is closed, + // and we cannot write to the BasicStream until we know whether the final size is < 255 or not. + } + + public void + close() throws IOException + { + try + { + if(_bytes != null) + { + assert(_pos <= _bytes.length); + _s.pos(_spos); + _s.writeSize(_pos); + _s.expand(_pos); + _s.getBuffer().b.put(_bytes, 0, _pos); + _bytes = null; + } + else + { + int currentPos = _s.pos(); + _s.pos(_spos); + _s.writeSize(_pos); // Patch previously-written dummy value. + _s.pos(currentPos); + } + } + catch(java.lang.Exception ex) + { + throw new IOException(ex.toString()); + } + } + + private BasicStream _s; + private int _spos; + private byte[] _bytes; + private int _pos; +} |