ReaderMgr.hpp
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上传日期:2007-01-10
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xml/soap/webservice
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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: ReaderMgr.hpp,v $
- * Revision 1.13 2001/07/12 18:50:08 tng
- * Some performance modification regarding standalone check and xml decl check.
- *
- * Revision 1.12 2000/09/09 00:18:18 andyh
- * Reordered member variables in ThrowEOEJanitor. Patch submitted
- * by Kirk Wylie.
- *
- * Revision 1.11 2000/07/08 00:17:13 andyh
- * Cleanup of yesterday's speedup changes. Merged new bit into the
- * scanner character properties table.
- *
- * Revision 1.10 2000/07/07 01:08:44 andyh
- * Parser speed up in scan of XML content.
- *
- * Revision 1.9 2000/03/02 19:54:29 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 1.8 2000/02/24 20:18:07 abagchi
- * Swat for removing Log from API docs
- *
- * Revision 1.7 2000/02/24 02:12:53 aruna1
- * ReaderMgr:;getReaderDepth() added
- *
- * Revision 1.6 2000/02/06 07:47:53 rahulj
- * Year 2K copyright swat.
- *
- * Revision 1.5 2000/01/25 01:04:21 roddey
- * Fixes a bogus error about ]]> in char data.
- *
- * Revision 1.4 2000/01/24 20:40:43 roddey
- * Exposed the APIs to get to the byte offset in the source XML buffer. This stuff
- * is not tested yet, but I wanted to get the API changes in now so that the API
- * can be stablized.
- *
- * Revision 1.3 2000/01/12 00:15:04 roddey
- * Changes to deal with multiply nested, relative pathed, entities and to deal
- * with the new URL class changes.
- *
- * Revision 1.2 1999/12/15 19:48:03 roddey
- * Changed to use new split of transcoder interfaces into XML transcoders and
- * LCP transcoders, and implementation of intrinsic transcoders as pluggable
- * transcoders, and addition of Latin1 intrinsic support.
- *
- * Revision 1.1.1.1 1999/11/09 01:08:13 twl
- * Initial checkin
- *
- * Revision 1.4 1999/11/08 20:56:54 droddey
- * If the main xml entity does not exist, we need to get the error handling for that
- * inside the main XMLScanner::scanDocument() try block so that it gets reported
- * in the normal way. We have to add a little extra safety code because, when this
- * happens, there is no reader on the reader stack to get position ino from.
- *
- * Revision 1.3 1999/11/08 20:44:43 rahul
- * Swat for adding in Product name and CVS comment log variable.
- *
- */
- #if !defined(READERMGR_HPP)
- #define READERMGR_HPP
- #include <util/RefStackOf.hpp>
- #include <util/XMLString.hpp>
- #include <sax/Locator.hpp>
- #include <framework/XMLBuffer.hpp>
- #include <internal/XMLReader.hpp>
- class XMLBuffer;
- class XMLEntityDecl;
- class XMLEntityHandler;
- class XMLDocumentHandler;
- class XMLScanner;
- // ---------------------------------------------------------------------------
- // This class is used by the scanner. The scanner must deal with expansion
- // of entities, some of which are totally different files (external parsed
- // entities.) It does so by pushing readers onto a stack. The top reader is
- // the one it wants to read out of, but that one must be popped when it is
- // empty. To keep that logic from being all over the place, the scanner
- // talks to the reader manager, which handles the stack and popping off
- // used up readers.
- // ---------------------------------------------------------------------------
- class XMLPARSER_EXPORT ReaderMgr : public Locator
- {
- public :
- // -----------------------------------------------------------------------
- // Class specific types
- // -----------------------------------------------------------------------
- struct LastExtEntityInfo
- {
- const XMLCh* systemId;
- const XMLCh* publicId;
- unsigned int lineNumber;
- unsigned int colNumber;
- };
- // -----------------------------------------------------------------------
- // Constructors and Destructor
- // -----------------------------------------------------------------------
- ReaderMgr();
- ~ReaderMgr();
- // -----------------------------------------------------------------------
- // Convenience scanning methods
- //
- // This are all convenience methods that work in terms of the core
- // character spooling methods.
- // -----------------------------------------------------------------------
- bool atEOF() const;
- bool getName(XMLBuffer& toFill);
- bool getNameToken(XMLBuffer& toFill);
- XMLCh getNextChar();
- bool getNextCharIfNot(const XMLCh chNotToGet, XMLCh& chGotten);
- void movePlainContentChars(XMLBuffer &dest);
- void getSpaces(XMLBuffer& toFill);
- void getUpToCharOrWS(XMLBuffer& toFill, const XMLCh toCheck);
- bool isEmpty() const;
- bool lookingAtChar(const XMLCh toCheck);
- bool lookingAtSpace();
- XMLCh peekNextChar();
- bool skipIfQuote(XMLCh& chGotten);
- void skipPastChar(const XMLCh toSkip);
- bool skipPastSpaces();
- void skipToChar(const XMLCh toSkipTo);
- bool skippedChar(const XMLCh toSkip);
- bool skippedSpace();
- bool skippedString(const XMLCh* const toSkip);
- void skipQuotedString(const XMLCh quoteCh);
- XMLCh skipUntilIn(const XMLCh* const listToSkip);
- XMLCh skipUntilInOrWS(const XMLCh* const listToSkip);
- bool peekString(const XMLCh* const toPeek);
- // -----------------------------------------------------------------------
- // Control methods
- // -----------------------------------------------------------------------
- void cleanStackBackTo(const unsigned int readerNum);
- XMLReader* createReader
- (
- const InputSource& src
- , const bool xmlDecl
- , const XMLReader::RefFrom refFrom
- , const XMLReader::Types type
- , const XMLReader::Sources source
- );
- XMLReader* createReader
- (
- const XMLCh* const sysId
- , const XMLCh* const pubId
- , const bool xmlDecl
- , const XMLReader::RefFrom refFrom
- , const XMLReader::Types type
- , const XMLReader::Sources source
- , InputSource*& srcToFill
- );
- XMLReader* createIntEntReader
- (
- const XMLCh* const sysId
- , const XMLReader::RefFrom refFrom
- , const XMLReader::Types type
- , const XMLCh* const dataBuf
- , const unsigned int dataLen
- , const bool copyBuf
- );
- bool isScanningPERefOutOfLiteral() const;
- bool pushReader
- (
- XMLReader* const reader
- , XMLEntityDecl* const entity
- );
- void reset();
- // -----------------------------------------------------------------------
- // Getter methods
- // -----------------------------------------------------------------------
- const XMLCh* getCurrentEncodingStr() const;
- const XMLEntityDecl* getCurrentEntity() const;
- XMLEntityDecl* getCurrentEntity();
- const XMLReader* getCurrentReader() const;
- XMLReader* getCurrentReader();
- unsigned int getCurrentReaderNum() const;
- unsigned int getReaderDepth() const;
- void getLastExtEntityInfo(LastExtEntityInfo& lastInfo) const;
- unsigned int getSrcOffset() const;
- bool getThrowEOE() const;
- // -----------------------------------------------------------------------
- // Setter methods
- // -----------------------------------------------------------------------
- void setEntityHandler(XMLEntityHandler* const newHandler);
- void setThrowEOE(const bool newValue);
- // -----------------------------------------------------------------------
- // Implement the SAX Locator interface
- // -----------------------------------------------------------------------
- virtual const XMLCh* getPublicId() const;
- virtual const XMLCh* getSystemId() const;
- virtual int getLineNumber() const;
- virtual int getColumnNumber() const;
- private :
- // -----------------------------------------------------------------------
- // Private helper methods
- // -----------------------------------------------------------------------
- const XMLReader* getLastExtEntity(const XMLEntityDecl*& itsEntity) const;
- bool popReader();
- // -----------------------------------------------------------------------
- // Private data members
- //
- // fCurEntity
- // This is the current top of stack entity. We pull it off the stack
- // and store it here for efficiency.
- //
- // fCurReader
- // This is the current top of stack reader. We pull it off the
- // stack and store it here for efficiency.
- //
- // fEntityHandler
- // This is the installed entity handler. Its installed via the
- // scanner but he passes it on to us since we need it the most, in
- // process of creating external entity readers.
- //
- // fEntityStack
- // We need to keep up with which of the pushed readers are pushed
- // entity values that are being spooled. This is done to avoid the
- // problem of recursive definitions. This stack consists of refs to
- // EntityDecl objects for the pushed entities.
- //
- // fNextReaderNum
- // This is the reader serial number value. Each new reader that is
- // created from this reader is given a successive number. This lets
- // us catch things like partial markup errors and such.
- //
- // fReaderStack
- // This is the stack of reader references. We own all the readers
- // and destroy them when they are used up.
- //
- // fThrowEOE
- // This flag controls whether we throw an exception when we hit an
- // end of entity. The scanner doesn't really need to know about ends
- // of entities in the int/ext subsets, so it will turn this flag off
- // until it gets into the content usually.
- // -----------------------------------------------------------------------
- XMLEntityDecl* fCurEntity;
- XMLReader* fCurReader;
- XMLEntityHandler* fEntityHandler;
- RefStackOf<XMLEntityDecl>* fEntityStack;
- unsigned int fNextReaderNum;
- RefStackOf<XMLReader>* fReaderStack;
- bool fThrowEOE;
- };
- // ---------------------------------------------------------------------------
- // ReaderMgr: Inlined methods
- //
- // NOTE: We cannot put these in alphabetical and type order as we usually
- // do because some of the compilers we have to support are too stupid to
- // understand out of order inlines!
- // ---------------------------------------------------------------------------
- inline unsigned int ReaderMgr::getCurrentReaderNum() const
- {
- return fCurReader->getReaderNum();
- }
- inline bool ReaderMgr::getName(XMLBuffer& toFill)
- {
- toFill.reset();
- return fCurReader->getName(toFill, false);
- }
- inline bool ReaderMgr::getNameToken(XMLBuffer& toFill)
- {
- toFill.reset();
- return fCurReader->getName(toFill, true);
- }
- inline bool ReaderMgr::getNextCharIfNot(const XMLCh chNotToGet, XMLCh& chGotten)
- {
- return fCurReader->getNextCharIfNot(chNotToGet, chGotten);
- }
- inline void ReaderMgr::movePlainContentChars(XMLBuffer &dest)
- {
- fCurReader->movePlainContentChars(dest);
- }
- inline bool ReaderMgr::getThrowEOE() const
- {
- return fThrowEOE;
- }
- inline unsigned int ReaderMgr::getSrcOffset() const
- {
- return fCurReader->getSrcOffset();
- }
- inline bool ReaderMgr::lookingAtChar(const XMLCh chToCheck)
- {
- return (chToCheck == peekNextChar());
- }
- inline bool ReaderMgr::lookingAtSpace()
- {
- return XMLReader::isWhitespace(peekNextChar());
- }
- inline void ReaderMgr::setThrowEOE(const bool newValue)
- {
- fThrowEOE = newValue;
- }
- inline bool ReaderMgr::skippedString(const XMLCh* const toSkip)
- {
- return fCurReader->skippedString(toSkip);
- }
- inline void ReaderMgr::skipToChar(const XMLCh toSkipTo)
- {
- while (true)
- {
- // Get chars until we find the one to skip
- const XMLCh nextCh = getNextChar();
- // Break out at end of input or the char to skip
- if ((nextCh == toSkipTo) || !nextCh)
- break;
- }
- }
- inline void ReaderMgr::skipPastChar(const XMLCh toSkipPast)
- {
- while (true)
- {
- // Get chars until we find the one to skip
- const XMLCh nextCh = getNextChar();
- if ((nextCh == toSkipPast) || !nextCh)
- break;
- }
- }
- inline bool ReaderMgr::peekString(const XMLCh* const toPeek)
- {
- return fCurReader->peekString(toPeek);
- }
- inline void ReaderMgr::setEntityHandler(XMLEntityHandler* const newHandler)
- {
- fEntityHandler = newHandler;
- }
- //
- // This is a simple class to temporarily change the 'throw at end of entity'
- // flag of the reader manager. There are some places where we need to
- // turn this on and off on a scoped basis.
- //
- class XMLPARSER_EXPORT ThrowEOEJanitor
- {
- public :
- // -----------------------------------------------------------------------
- // Constructors and destructor
- // -----------------------------------------------------------------------
- ThrowEOEJanitor(ReaderMgr* mgrTarget, const bool newValue) :
- fOld(mgrTarget->getThrowEOE())
- , fMgr(mgrTarget)
- {
- mgrTarget->setThrowEOE(newValue);
- }
- ~ThrowEOEJanitor()
- {
- fMgr->setThrowEOE(fOld);
- };
- private :
- // -----------------------------------------------------------------------
- // Private data members
- //
- // fOld
- // The previous value of the flag, which we replaced during ctor,
- // and will replace during dtor.
- //
- // fMgr
- // A pointer to the reader manager we are going to set/reset the
- // flag on.
- // -----------------------------------------------------------------------
- bool fOld;
- ReaderMgr* fMgr;
- };
- #endif