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IC_Selector.cpp：源码内容
							/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001 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
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 *    software without prior written permission. For written
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 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
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 *
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 * individuals on behalf of the Apache Software Foundation, and was
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/*
 * $Log: IC_Selector.cpp,v $
 * Revision 1.5  2003/05/15 18:59:34  knoaman
 * Partial implementation of the configurable memory manager.
 *
 * Revision 1.4  2003/01/13 16:30:19  knoaman
 * [Bug 14469] Validator doesn't enforce xsd:key.
 *
 * Revision 1.3  2002/11/04 14:47:41  tng
 * C++ Namespace Support.
 *
 * Revision 1.2  2002/08/27 05:56:19  knoaman
 * Identity Constraint: handle case of recursive elements.
 *
 * Revision 1.1.1.1  2002/02/01 22:22:50  peiyongz
 * sane_include
 *
 * Revision 1.3  2001/11/23 18:35:33  tng
 * Eliminate Warning from AIX xlC 3.6:1540-399: (W) "XMLAttr" is undefined.  The delete operator will not call a destructor.
 *
 * Revision 1.2  2001/11/15 17:10:19  knoaman
 * Particle derivation checking support.
 *
 * Revision 1.1  2001/11/02 14:08:40  knoaman
 * Add support for identity constraints.
 *
 */
// ---------------------------------------------------------------------------
//  Includes
// ---------------------------------------------------------------------------
#include <xercesc/framework/XMLAttr.hpp>
#include <xercesc/validators/schema/identity/IC_Selector.hpp>
#include <xercesc/validators/schema/identity/XercesXPath.hpp>
#include <xercesc/validators/schema/identity/IdentityConstraint.hpp>
#include <xercesc/validators/schema/identity/FieldActivator.hpp>
XERCES_CPP_NAMESPACE_BEGIN
// ---------------------------------------------------------------------------
//  SelectorMatcher: Constructors and Destructor
// ---------------------------------------------------------------------------
SelectorMatcher::SelectorMatcher(XercesXPath* const xpath,
                                 IC_Selector* const selector,
                                 FieldActivator* const fieldActivator,
                                 const int initialDepth,
                                 MemoryManager* const manager)
    : XPathMatcher(xpath, selector->getIdentityConstraint(), manager)
    , fInitialDepth(initialDepth)
    , fElementDepth(0)
    , fMatchedDepth(-1)
    , fSelector(selector)
    , fFieldActivator(fieldActivator)
{
}
// ---------------------------------------------------------------------------
//  FieldMatcher: XMLDocumentHandler methods
// ---------------------------------------------------------------------------
void SelectorMatcher::startDocumentFragment() {
    XPathMatcher::startDocumentFragment();
    fElementDepth = 0;
    fMatchedDepth = -1;
}
void SelectorMatcher::startElement(const XMLElementDecl& elemDecl,
                                   const unsigned int urlId,
                                   const XMLCh* const elemPrefix,
                                   const RefVectorOf<XMLAttr>& attrList,
                                   const unsigned int attrCount) {
    XPathMatcher::startElement(elemDecl, urlId, elemPrefix, attrList, attrCount);
    fElementDepth++;
    // activate the fields, if selector is matched
    int matched = isMatched();
    if ((fMatchedDepth == -1 && ((matched & XP_MATCHED) == XP_MATCHED))
        || ((matched & XP_MATCHED_D) == XP_MATCHED_D)) {
        IdentityConstraint* ic = fSelector->getIdentityConstraint();
        int count = ic->getFieldCount();
        fMatchedDepth = fElementDepth;
        fFieldActivator->startValueScopeFor(ic, fInitialDepth);
        for (int i = 0; i < count; i++) {
            XPathMatcher* matcher = fFieldActivator->activateField(ic->getFieldAt(i), fInitialDepth);
            matcher->startElement(elemDecl, urlId, elemPrefix, attrList, attrCount);
        }
    }
}
void SelectorMatcher::endElement(const XMLElementDecl& elemDecl,
                                 const XMLCh* const elemContent) {
    XPathMatcher::endElement(elemDecl, elemContent);
    if (fElementDepth-- == fMatchedDepth) {
        fMatchedDepth = -1;
        fFieldActivator->endValueScopeFor(fSelector->getIdentityConstraint(), fInitialDepth);
    }
}
// ---------------------------------------------------------------------------
//  IC_Selector: Constructors and Destructor
// ---------------------------------------------------------------------------
IC_Selector::IC_Selector(XercesXPath* const xpath,
                         IdentityConstraint* const identityConstraint)
    : fXPath(xpath)
    , fIdentityConstraint(identityConstraint)
{
}
IC_Selector::~IC_Selector()
{
    delete fXPath;
}
// ---------------------------------------------------------------------------
//  IC_Selector: operators
// ---------------------------------------------------------------------------
bool IC_Selector::operator ==(const IC_Selector& other) const {
    return (*fXPath == *(other.fXPath));
}
bool IC_Selector::operator !=(const IC_Selector& other) const {
    return !operator==(other);
}
// ---------------------------------------------------------------------------
//  IC_Selector: Factory methods
// ---------------------------------------------------------------------------
XPathMatcher* IC_Selector::createMatcher(FieldActivator* const fieldActivator,
                                         const int initialDepth,
                                         MemoryManager* const manager) {
    return new (manager) SelectorMatcher(fXPath, this, fieldActivator, initialDepth, manager);
}
XERCES_CPP_NAMESPACE_END
/**
  * End of file IC_Selector.cpp
  */

						