xercesxpath.cpp

来自「IBM的解析xml的工具Xerces的源代码」· C++ 代码 · 共 1,455 行 · 第 1/4 页

/*
 * Copyright 2001,2004 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.
 */

/*
 * $Log: XercesXPath.cpp,v $
 * Revision 1.14  2004/09/08 13:56:59  peiyongz
 * Apache License Version 2.0
 *
 * Revision 1.13  2004/01/29 11:52:32  cargilld
 * Code cleanup changes to get rid of various compiler diagnostic messages.
 *
 * Revision 1.12  2003/12/17 00:18:41  cargilld
 * Update to memory management so that the static memory manager (one used to call Initialize) is only for static data.
 *
 * Revision 1.11  2003/10/17 21:18:04  peiyongz
 * using XTemplateSerializer
 *
 * Revision 1.10  2003/10/14 15:24:23  peiyongz
 * Implementation of Serialization/Deserialization
 *
 * Revision 1.9  2003/10/01 16:32:42  neilg
 * improve handling of out of memory conditions, bug #23415.  Thanks to David Cargill.
 *
 * Revision 1.8  2003/05/18 14:02:09  knoaman
 * Memory manager implementation: pass per instance manager.
 *
 * Revision 1.7  2003/05/16 21:43:22  knoaman
 * Memory manager implementation: Modify constructors to pass in the memory manager.
 *
 * Revision 1.6  2003/05/15 18:59:34  knoaman
 * Partial implementation of the configurable memory manager.
 *
 * Revision 1.5  2002/12/20 22:10:48  tng
 * XML 1.1
 *
 * Revision 1.4  2002/12/04 18:21:23  knoaman
 * Identity constraint fix.
 *
 * Revision 1.3  2002/11/04 14:47:42  tng
 * C++ Namespace Support.
 *
 * Revision 1.2  2002/10/30 21:52:01  tng
 * [Bug 13641] compiler-generated copy-constructor for QName doesn't do the right thing.
 *
 * Revision 1.1.1.1  2002/02/01 22:22:51  peiyongz
 * sane_include
 *
 * Revision 1.3  2001/11/15 17:10:19  knoaman
 * Particle derivation checking support.
 *
 * Revision 1.2  2001/11/07 14:25:36  knoaman
 * Fix compliation error on Unix.
 *
 * Revision 1.1  2001/11/02 14:08:40  knoaman
 * Add support for identity constraints.
 *
 */

// ---------------------------------------------------------------------------
//  Includes
// ---------------------------------------------------------------------------
#include <xercesc/validators/schema/identity/XercesXPath.hpp>
#include <xercesc/validators/schema/identity/XPathSymbols.hpp>
#include <xercesc/validators/schema/identity/XPathException.hpp>
#include <xercesc/validators/schema/NamespaceScope.hpp>
#include <xercesc/util/StringPool.hpp>
#include <xercesc/util/Janitor.hpp>
#include <xercesc/framework/XMLBuffer.hpp>
#include <xercesc/internal/XMLReader.hpp>
#include <xercesc/util/RuntimeException.hpp>
#include <xercesc/util/OutOfMemoryException.hpp>

#include <xercesc/internal/XTemplateSerializer.hpp>

XERCES_CPP_NAMESPACE_BEGIN


// ---------------------------------------------------------------------------
//  Static data
// ---------------------------------------------------------------------------
const XMLByte XPathScanner::fASCIICharMap[128] =
{
    0,  0,  0,  0,  0,  0,  0,  0,  0,  2,  2,  0,  0,  2,  0,  0,
    0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
    2,  3,  4,  1,  5,  1,  1,  4,  6,  7,  8,  9, 10, 11, 12, 13,
    14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15,  1, 16, 17, 18,  1,
    19, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
    20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 21,  1, 22,  1, 23,
    1, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
    20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,  1, 24,  1,  1,  1
};


// ---------------------------------------------------------------------------
//  XercesNodeTest: Constructors and Destructor
// ---------------------------------------------------------------------------
XercesNodeTest::XercesNodeTest(const short aType,
                               MemoryManager* const manager)
    : fType(aType)
    , fName(new (manager) QName(manager))
{
}

XercesNodeTest::XercesNodeTest(const QName* const qName)
    : fType(QNAME)
    , fName(new (qName->getMemoryManager()) QName(*qName))
{
}

XercesNodeTest::XercesNodeTest(const XMLCh* const prefix,
                               const unsigned int uriId,
                               MemoryManager* const manager)
    : fType(NAMESPACE)
    , fName(new (manager) QName(manager))
{
    fName->setURI(uriId);
    fName->setPrefix(prefix);
}

XercesNodeTest::XercesNodeTest(const XercesNodeTest& other)
    : fType(other.fType)
    , fName(new ((other.fName)->getMemoryManager())QName(*other.fName))
{
}

/***
 * Support for Serialization/De-serialization
 ***/

IMPL_XSERIALIZABLE_TOCREATE(XercesNodeTest)

void XercesNodeTest::serialize(XSerializeEngine& serEng)
{

    if (serEng.isStoring())
    {
        serEng<<fType;
        serEng<<fName;
    }
    else
    {
        serEng>>fType;
        serEng>>fName;
    }
}

XercesNodeTest::XercesNodeTest(MemoryManager* const)
:fType(UNKNOWN)
,fName(0)
{
}

// ---------------------------------------------------------------------------
//  XercesNodeTest: Operators
// ---------------------------------------------------------------------------
XercesNodeTest& XercesNodeTest::operator=(const XercesNodeTest& other)
{
    if (this == &other)
        return *this;

    fType = other.fType;
    fName->setValues(*(other.fName));
    return *this;
}

bool XercesNodeTest::operator ==(const XercesNodeTest& other) const {

    if (this == &other)
        return true;

    if (fType != other.fType)
        return false;

    return (*fName == *(other.fName));
}


bool XercesNodeTest::operator !=(const XercesNodeTest& other) const {

    return !operator==(other);
}

// ---------------------------------------------------------------------------
//  XercesStep: Constructors and Destructor
// ---------------------------------------------------------------------------
XercesStep::XercesStep(const unsigned short axisType, XercesNodeTest* const nodeTest)
    : fAxisType(axisType)
    , fNodeTest(nodeTest)
{
}

XercesStep::XercesStep(const XercesStep& other)
    : fAxisType(other.fAxisType)
    , fNodeTest(0)
{
    fNodeTest = new (other.fNodeTest->getName()->getMemoryManager()) XercesNodeTest(*(other.fNodeTest));
}


// ---------------------------------------------------------------------------
//  XercesStep: Operators
// ---------------------------------------------------------------------------
XercesStep& XercesStep::operator=(const XercesStep& other)
{
    if (this == &other)
        return *this;

    fAxisType = other.fAxisType;
    *fNodeTest = *(other.fNodeTest);
    return *this;
}

bool XercesStep::operator==(const XercesStep& other) const {

    if (this == &other)
        return true;

    if (fAxisType != other.fAxisType)
        return false;

    if (fAxisType == XercesStep::CHILD ||
        fAxisType == XercesStep::ATTRIBUTE) {
        return (*fNodeTest == *(other.fNodeTest));
    }

    return true;
}

bool XercesStep::operator!=(const XercesStep& other) const {

    return !operator==(other);
}

/***
 * Support for Serialization/De-serialization
 ***/

IMPL_XSERIALIZABLE_TOCREATE(XercesStep)

void XercesStep::serialize(XSerializeEngine& serEng)
{
    if (serEng.isStoring())
    {
        serEng<<fAxisType;
        serEng<<fNodeTest;
    }
    else
    {
        serEng>>fAxisType;
        serEng>>fNodeTest;
    }
}

XercesStep::XercesStep(MemoryManager* const)
:fAxisType(UNKNOWN)
,fNodeTest(0)
{
}

// ---------------------------------------------------------------------------
//  XercesLocationPath: Constructors and Destructor
// ---------------------------------------------------------------------------
XercesLocationPath::XercesLocationPath(RefVectorOf<XercesStep>* const steps)
    : fSteps(steps)
{
}

// ---------------------------------------------------------------------------
//  XercesLocationPath: Operators
// ---------------------------------------------------------------------------
bool XercesLocationPath::operator==(const XercesLocationPath& other) const {

    unsigned int stepsSize = fSteps->size();

    if (stepsSize != other.fSteps->size())
        return false;

    for (unsigned int i=0; i < stepsSize; i++) {
        if (*(fSteps->elementAt(i)) != *(other.fSteps->elementAt(i)))
            return false;
    }

    return true;
}

bool XercesLocationPath::operator!=(const XercesLocationPath& other) const {

    return !operator==(other);
}

/***
 * Support for Serialization/De-serialization
 ***/

IMPL_XSERIALIZABLE_TOCREATE(XercesLocationPath)

void XercesLocationPath::serialize(XSerializeEngine& serEng)
{
    if (serEng.isStoring())
    {
        /***
         * Serialize RefVectorOf<XercesStep>* fSteps;
         ***/
        XTemplateSerializer::storeObject(fSteps, serEng);
    }
    else
    {
        /***
         * Deserialize RefVectorOf<XercesStep>* fSteps;
         ***/
        XTemplateSerializer::loadObject(&fSteps, 8, true, serEng);
    }
}

XercesLocationPath::XercesLocationPath(MemoryManager* const)
:fSteps(0)
{
}

// ---------------------------------------------------------------------------
//  XercesPath: Constructors and Destructor
// ---------------------------------------------------------------------------
XercesXPath::XercesXPath(const XMLCh* const xpathExpr,
                         XMLStringPool* const stringPool,
                         NamespaceScope* const scopeContext,
                         const unsigned int emptyNamespaceId,
                         const bool isSelector,
                         MemoryManager* const manager)
    : fEmptyNamespaceId(emptyNamespaceId)
    , fExpression(0)
    , fLocationPaths(0)
    , fMemoryManager(manager)
{
    try
    {
        fExpression = XMLString::replicate(xpathExpr, fMemoryManager);
        parseExpression(stringPool, scopeContext);

        if (isSelector) {
            checkForSelectedAttributes();
        }
    }
    catch(const OutOfMemoryException&)
    {
        throw;
    }
    catch(...) {

        cleanUp();
        throw;
    }