DGXMLScanner.cpp

/*
 * Copyright 2002, 2003,2004 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * $Id$
 */


// ---------------------------------------------------------------------------
//  Includes
// ---------------------------------------------------------------------------
#include <xercesc/internal/DGXMLScanner.hpp>
#include <xercesc/util/Janitor.hpp>
#include <xercesc/util/RuntimeException.hpp>
#include <xercesc/util/UnexpectedEOFException.hpp>
#include <xercesc/util/XMLUri.hpp>
#include <xercesc/framework/URLInputSource.hpp>
#include <xercesc/framework/LocalFileInputSource.hpp>
#include <xercesc/framework/XMLDocumentHandler.hpp>
#include <xercesc/framework/XMLEntityHandler.hpp>
#include <xercesc/framework/XMLPScanToken.hpp>
#include <xercesc/framework/XMLGrammarPool.hpp>
#include <xercesc/framework/XMLDTDDescription.hpp>
#include <xercesc/internal/EndOfEntityException.hpp>
#include <xercesc/validators/common/GrammarResolver.hpp>
#include <xercesc/validators/DTD/DocTypeHandler.hpp>
#include <xercesc/validators/DTD/DTDScanner.hpp>
#include <xercesc/validators/DTD/DTDValidator.hpp>
#include <xercesc/util/OutOfMemoryException.hpp>
#include <xercesc/util/XMLResourceIdentifier.hpp>
#include <xercesc/util/HashPtr.hpp>

XERCES_CPP_NAMESPACE_BEGIN

// ---------------------------------------------------------------------------
//  DGXMLScanner: Constructors and Destructor
// ---------------------------------------------------------------------------
DGXMLScanner::DGXMLScanner(XMLValidator* const valToAdopt
                         , GrammarResolver* const grammarResolver
                         , MemoryManager* const manager) :

    XMLScanner(valToAdopt, grammarResolver, manager)
    , fAttrNSList(0)
    , fDTDValidator(0)
    , fDTDGrammar(0)
    , fDTDElemNonDeclPool(0)
    , fElemCount(0)
    , fAttDefRegistry(0)
    , fUndeclaredAttrRegistry(0)
{
    try
    {
        commonInit();

        if (valToAdopt)
        {
            if (!valToAdopt->handlesDTD())
               ThrowXMLwithMemMgr(RuntimeException, XMLExcepts::Gen_NoDTDValidator, fMemoryManager);
        }
        else
        {
            fValidator = fDTDValidator;
        }
    }
    catch(const OutOfMemoryException&)
    {
        throw;
    }
    catch(...)
    {
        cleanUp();
        throw;
    }
}

DGXMLScanner::DGXMLScanner( XMLDocumentHandler* const docHandler
                          , DocTypeHandler* const     docTypeHandler
                          , XMLEntityHandler* const   entityHandler
                          , XMLErrorReporter* const   errHandler
                          , XMLValidator* const       valToAdopt
                          , GrammarResolver* const    grammarResolver
                          , MemoryManager* const      manager) :

    XMLScanner(docHandler, docTypeHandler, entityHandler, errHandler, valToAdopt, grammarResolver, manager)
    , fAttrNSList(0)
    , fDTDValidator(0)
    , fDTDGrammar(0)
    , fDTDElemNonDeclPool(0)
    , fElemCount(0)
    , fAttDefRegistry(0)
    , fUndeclaredAttrRegistry(0)
{
    try
    {	
        commonInit();

        if (valToAdopt)
        {
            if (!valToAdopt->handlesDTD())
               ThrowXMLwithMemMgr(RuntimeException, XMLExcepts::Gen_NoDTDValidator, fMemoryManager);
        }
        else
        {
            fValidator = fDTDValidator;
        }
    }
    catch(const OutOfMemoryException&)
    {
        throw;
    }
    catch(...)
    {
        cleanUp();
        throw;
    }
}

DGXMLScanner::~DGXMLScanner()
{
    cleanUp();
}

// ---------------------------------------------------------------------------
//  XMLScanner: Getter methods
// ---------------------------------------------------------------------------
NameIdPool<DTDEntityDecl>* DGXMLScanner::getEntityDeclPool()
{
    if(!fGrammar)
        return 0;
    return ((DTDGrammar*)fGrammar)->getEntityDeclPool();
}

const NameIdPool<DTDEntityDecl>* DGXMLScanner::getEntityDeclPool() const
{
    if(!fGrammar)
        return 0;
    return ((DTDGrammar*)fGrammar)->getEntityDeclPool();
}

// ---------------------------------------------------------------------------
//  DGXMLScanner: Main entry point to scan a document
// ---------------------------------------------------------------------------
void DGXMLScanner::scanDocument(const InputSource& src)
{
    //  Bump up the sequence id for this parser instance. This will invalidate
    //  any previous progressive scan tokens.
    fSequenceId++;

    try
    {
        //  Reset the scanner and its plugged in stuff for a new run. This
        //  resets all the data structures, creates the initial reader and
        //  pushes it on the stack, and sets up the base document path.
        scanReset(src);

        // If we have a document handler, then call the start document
        if (fDocHandler)
            fDocHandler->startDocument();

        //  Scan the prolog part, which is everything before the root element
        //  including the DTD subsets.
        scanProlog();

        //  If we got to the end of input, then its not a valid XML file.
        //  Else, go on to scan the content.
        if (fReaderMgr.atEOF())
        {
            emitError(XMLErrs::EmptyMainEntity);
        }
        else
        {
            // Scan content, and tell it its not an external entity
            if (scanContent())
            {
                // Do post-parse validation if required
                if (fValidate)
                {
                    //  We handle ID reference semantics at this level since
                    //  its required by XML 1.0.
                    checkIDRefs();

                    // Then allow the validator to do any extra stuff it wants
//                    fValidator->postParseValidation();
                }

                // That went ok, so scan for any miscellaneous stuff
                if (!fReaderMgr.atEOF())