XMLGrammarPoolImpl.cpp

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/*
 * $Log$
 * Revision 1.6  2003/10/09 13:54:25  neilg
 * modify grammar pool implementation to that, once locked, a thread-safe StringPool is used
 *
 * Revision 1.5  2003/09/16 18:30:54  neilg
 * make Grammar pool be responsible for creating and owning URI string pools.  This is one more step towards having grammars be independent of the parsers involved in their creation
 *
 * Revision 1.4  2003/09/02 08:59:02  gareth
 * Added API to get enumerator of grammars.
 *
 * Revision 1.3  2003/07/31 17:05:03  peiyongz
 * Grammar embed Grammar Description
 * using getGrammar(URI)
 * update GrammarDescription info
 *
 * Revision 1.2  2003/06/20 22:19:30  peiyongz
 * Stateless Grammar Pool :: Part I
 *
 * Revision 1.1  2003/06/20 18:38:39  peiyongz
 * Stateless Grammar Pool :: Part I
 *
 * $Id$
 *
 */


// ---------------------------------------------------------------------------
//  Includes
// ---------------------------------------------------------------------------
#include <xercesc/internal/XMLGrammarPoolImpl.hpp>
#include <xercesc/validators/DTD/DTDGrammar.hpp>
#include <xercesc/validators/DTD/XMLDTDDescriptionImpl.hpp>
#include <xercesc/validators/schema/SchemaGrammar.hpp>
#include <xercesc/validators/schema/XMLSchemaDescriptionImpl.hpp>

XERCES_CPP_NAMESPACE_BEGIN

// ---------------------------------------------------------------------------
//  XMLGrammarPoolImpl: constructor and destructor
// ---------------------------------------------------------------------------
XMLGrammarPoolImpl::~XMLGrammarPoolImpl()
{
    delete fGrammarRegistry;
    delete fStringPool;
    if(fSynchronizedStringPool)
        delete fSynchronizedStringPool;
}

XMLGrammarPoolImpl::XMLGrammarPoolImpl(MemoryManager* const memMgr)
:XMLGrammarPool(memMgr)
,fGrammarRegistry(0)
,fStringPool(0)
,fSynchronizedStringPool(0)
,fLocked(false)
{
    fGrammarRegistry = new (memMgr) RefHashTableOf<Grammar>(29, true, memMgr);
    fStringPool = new (memMgr) XMLStringPool(109, memMgr);
}

// -----------------------------------------------------------------------
// Implementation of Grammar Pool Interface 
// -----------------------------------------------------------------------
void XMLGrammarPoolImpl::cacheGrammar(Grammar* const               gramToCache )
{
    if (!gramToCache )
        return;

    const XMLCh* grammarKey = gramToCache->getGrammarDescription()->getGrammarKey();

    if (fGrammarRegistry->containsKey(grammarKey)) 
    {
        ThrowXML(RuntimeException, XMLExcepts::GC_ExistingGrammar);
    }

    fGrammarRegistry->put((void*) grammarKey, gramToCache); 

}

Grammar* XMLGrammarPoolImpl::retrieveGrammar(XMLGrammarDescription* const gramDesc)
{
    if (!gramDesc)
        return 0;

    /***
     * This implementation simply use GrammarKey
     */
    return fGrammarRegistry->get(gramDesc->getGrammarKey());
    
}

Grammar* XMLGrammarPoolImpl::orphanGrammar(const XMLCh* const nameSpaceKey)
{
    return fGrammarRegistry->orphanKey(nameSpaceKey); 
}

RefHashTableOfEnumerator<Grammar>
XMLGrammarPoolImpl::getGrammarEnumerator() const
{
    return RefHashTableOfEnumerator<Grammar>(fGrammarRegistry);
}


void XMLGrammarPoolImpl::clear()
{
    fGrammarRegistry->removeAll();
}

void XMLGrammarPoolImpl::lockPool()
{
    fLocked = true;
    if(!fSynchronizedStringPool)
    {
        MemoryManager *memMgr = getMemoryManager();
        fSynchronizedStringPool = new (memMgr) XMLSynchronizedStringPool(fStringPool, 109, memMgr);
    }
}

void XMLGrammarPoolImpl::unlockPool()
{
    fLocked = false;
    if(fSynchronizedStringPool)
        fSynchronizedStringPool->flushAll();
}

// -----------------------------------------------------------------------
// Implementation of Factory Interface 
// -----------------------------------------------------------------------
DTDGrammar*  XMLGrammarPoolImpl::createDTDGrammar()
{ 
	return new (getMemoryManager()) DTDGrammar(getMemoryManager());
}                                    

SchemaGrammar* XMLGrammarPoolImpl::createSchemaGrammar()
{
	return new (getMemoryManager()) SchemaGrammar(getMemoryManager()); 
}

XMLDTDDescription*  XMLGrammarPoolImpl::createDTDDescription(const XMLCh* const rootName)
{ 
	return new (getMemoryManager()) XMLDTDDescriptionImpl(rootName, getMemoryManager()); 
}
								   
XMLSchemaDescription* XMLGrammarPoolImpl::createSchemaDescription(const XMLCh* const targetNamespace)
{
	return new (getMemoryManager()) XMLSchemaDescriptionImpl(targetNamespace, getMemoryManager()); 
}

inline XMLStringPool *XMLGrammarPoolImpl::getURIStringPool() 
{
    if(fLocked)
        return fSynchronizedStringPool;
    return fStringPool;
}

XERCES_CPP_NAMESPACE_END