XMLBufferMgr.hpp
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上传日期:2007-01-10
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文件大小:7k
源码类别:
xml/soap/webservice
开发平台:
C/C++
- /*
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 1999-2000 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Xerces" and "Apache Software Foundation" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * nor may "Apache" appear in their name, without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation, and was
- * originally based on software copyright (c) 1999, International
- * Business Machines, Inc., http://www.ibm.com . For more information
- * on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- /*
- * $Log: XMLBufferMgr.hpp,v $
- * Revision 1.5 2000/03/02 19:54:24 roddey
- * This checkin includes many changes done while waiting for the
- * 1.1.0 code to be finished. I can't list them all here, but a list is
- * available elsewhere.
- *
- * Revision 1.4 2000/02/24 20:00:23 abagchi
- * Swat for removing Log from API docs
- *
- * Revision 1.3 2000/02/15 01:21:30 roddey
- * Some initial documentation improvements. More to come...
- *
- * Revision 1.2 2000/02/06 07:47:47 rahulj
- * Year 2K copyright swat.
- *
- * Revision 1.1.1.1 1999/11/09 01:08:30 twl
- * Initial checkin
- *
- * Revision 1.2 1999/11/08 20:44:36 rahul
- * Swat for adding in Product name and CVS comment log variable.
- *
- */
- #if !defined(XMLBUFFERMGR_HPP)
- #define XMLBUFFERMGR_HPP
- #include <util/XercesDefs.hpp>
- #include <framework/XMLBuffer.hpp>
- class XMLBufBid;
- /**
- * There are many places where XMLBuffer objects are needed. In order to
- * avoid either constantly creating and destroying them or maintaining a
- * fixed set and worrying about accidental reuse, a buffer manager can
- * provide a pool of buffers which can be temporarily used and then put
- * back into the pool. This provides a good compromise between performance
- * and easier maintenance.
- */
- class XMLPARSER_EXPORT XMLBufferMgr
- {
- public :
- // -----------------------------------------------------------------------
- // Constructors and Destructor
- // -----------------------------------------------------------------------
- /** @name Constructor */
- //@{
- XMLBufferMgr();
- //@}
- /** @name Destructor */
- //@{
- ~XMLBufferMgr();
- //@}
- // -----------------------------------------------------------------------
- // Buffer management
- // -----------------------------------------------------------------------
- XMLBuffer& bidOnBuffer();
- void releaseBuffer(XMLBuffer& toRelease);
- private :
- // -----------------------------------------------------------------------
- // Private data members
- //
- // fBufCount
- // The count of buffers that have been allocated so far.
- //
- // fBufList;
- // The list of pointers to buffers that are loaned out. There will
- // never be a lot of them, so a flat list is good enough.
- // -----------------------------------------------------------------------
- unsigned int fBufCount;
- XMLBuffer** fBufList;
- };
- /**
- * XMLBufBid is a scoped based janitor that allows the scanner code to ask
- * for a buffer on a scoped basis and then insure that it gets freed back
- * into the pool no matter how the scope is exited (exception or normal exit.)
- */
- class XMLBufBid
- {
- public :
- // -----------------------------------------------------------------------
- // Constructors and Destructor
- // -----------------------------------------------------------------------
- XMLBufBid(XMLBufferMgr* const srcMgr) :
- fBuffer(srcMgr->bidOnBuffer())
- , fMgr(srcMgr)
- {
- }
- ~XMLBufBid()
- {
- fMgr->releaseBuffer(fBuffer);
- }
- // -----------------------------------------------------------------------
- // Buffer access
- // -----------------------------------------------------------------------
- void append(const XMLCh toAppend)
- {
- fBuffer.append(toAppend);
- }
- void append(const XMLCh* const toAppend, const unsigned int count = 0)
- {
- fBuffer.append(toAppend, count);
- }
- const XMLBuffer& getBuffer() const
- {
- return fBuffer;
- }
- XMLBuffer& getBuffer()
- {
- return fBuffer;
- }
- const XMLCh* getRawBuffer() const
- {
- fBuffer.fBuffer[fBuffer.fIndex] = 0;
- return fBuffer.fBuffer;
- }
- XMLCh* getRawBuffer()
- {
- fBuffer.fBuffer[fBuffer.fIndex] = 0;
- return fBuffer.fBuffer;
- }
- unsigned int getLen() const
- {
- return fBuffer.fIndex;
- }
- bool isEmpty()
- {
- return (fBuffer.fIndex == 0);
- }
- void reset()
- {
- fBuffer.reset();
- }
- void set(const XMLCh* const chars, const unsigned int count = 0)
- {
- fBuffer.set(chars, count);
- }
- private :
- // -----------------------------------------------------------------------
- // Private data members
- //
- // fBuffer
- // This is the buffer we got, and which we will release.
- //
- // fMgr
- // This is the buffer manager we got the buffer from. This is needed
- // to release the buffer later.
- // -----------------------------------------------------------------------
- XMLBuffer& fBuffer;
- XMLBufferMgr* const fMgr;
- };
- #endif