/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001-2003 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) 2001, International
 * Business Machines, Inc., http://www.ibm.com .  For more information
 * on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

/*
 * $Id: XPathMatcherStack.hpp,v 1.4 2003/05/22 02:10:52 knoaman Exp $
 */

#if !defined(XPATHMATCHERSTACK_HPP)
#define XPATHMATCHERSTACK_HPP


// ---------------------------------------------------------------------------
//  Includes
// ---------------------------------------------------------------------------
#include <xercesc/validators/schema/identity/XPathMatcher.hpp>

XERCES_CPP_NAMESPACE_BEGIN

class VALIDATORS_EXPORT XPathMatcherStack : public XMemory
{
public:
    // -----------------------------------------------------------------------
    //  Constructors/Destructor
    // -----------------------------------------------------------------------
    XPathMatcherStack(MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager);
	~XPathMatcherStack();

	// -----------------------------------------------------------------------
    //  Getter methods
    // -----------------------------------------------------------------------
    XPathMatcher* getMatcherAt(const unsigned int index) const;
    unsigned int  getMatcherCount() const;
    unsigned int  size() const;

	// -----------------------------------------------------------------------
    //  Access methods
    // -----------------------------------------------------------------------
    void addMatcher(XPathMatcher* const matcher);

	// -----------------------------------------------------------------------
    //  Stack methods
    // -----------------------------------------------------------------------
    void pushContext();
    void popContext();

	// -----------------------------------------------------------------------
    //  Reset methods
    // -----------------------------------------------------------------------
    void clear();

private:
    // -----------------------------------------------------------------------
    //  Unimplemented contstructors and operators
    // -----------------------------------------------------------------------
    XPathMatcherStack(const XPathMatcherStack& other);
    XPathMatcherStack& operator= (const XPathMatcherStack& other);

    // -----------------------------------------------------------------------
    //  Data members
    // -----------------------------------------------------------------------
    unsigned int                fMatchersCount;
    ValueStackOf<int>*          fContextStack;
    RefVectorOf<XPathMatcher>*  fMatchers;
};

// ---------------------------------------------------------------------------
//  XPathMatcherStack: Getter methods
// ---------------------------------------------------------------------------
inline unsigned int XPathMatcherStack::size() const {

    return fContextStack->size();
}

inline unsigned int XPathMatcherStack::getMatcherCount() const {

    return fMatchersCount;
}

inline XPathMatcher*
XPathMatcherStack::getMatcherAt(const unsigned int index) const {

    return fMatchers->elementAt(index);
}

// ---------------------------------------------------------------------------
//  XPathMatcherStack: Stack methods
// ---------------------------------------------------------------------------
inline void XPathMatcherStack::pushContext() {

    fContextStack->push(fMatchersCount);
}

inline void XPathMatcherStack::popContext() {

    fMatchersCount = fContextStack->pop();
}

// ---------------------------------------------------------------------------
//  XPathMatcherStack: Access methods
// ---------------------------------------------------------------------------
inline void XPathMatcherStack::addMatcher(XPathMatcher* const matcher) {

    if (fMatchersCount == fMatchers->size()) {

        fMatchers->addElement(matcher);
        fMatchersCount++;
    }
    else {
        fMatchers->setElementAt(matcher, fMatchersCount++);
    }
}

XERCES_CPP_NAMESPACE_END

#endif

/**
  * End of file XPathMatcherStack.hpp
  */