/*
 * Copyright 1999-2004 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.
 */
// Class header file.
#include "NodeRefList.hpp"


#include <cassert>
#include <algorithm>

#if !defined(NDEBUG)
#include <xalanc/Include/XalanSet.hpp>
#endif


XALAN_CPP_NAMESPACE_BEGIN


NodeRefList::NodeRefList() :
	NodeRefListBase(),
	m_nodeList()
{
}


NodeRefList::NodeRefList(const NodeRefList&		theSource) :
	NodeRefListBase(theSource),
	m_nodeList(theSource.m_nodeList)
{
}


NodeRefList::NodeRefList(const NodeRefListBase&		theSource) :
	NodeRefListBase(theSource),
	m_nodeList()
{
	*this = theSource;
}


NodeRefList::~NodeRefList()
{
}


NodeRefList&
NodeRefList::operator=(const NodeRefListBase&	theRHS)
{
	if (&theRHS != this)
	{
		m_nodeList.clear();

		const size_type		theLength = theRHS.getLength();

		m_nodeList.reserve(theLength);

		for(size_type i = 0; i < theLength; i++)
		{
			XalanNode* const	theNode = theRHS.item(i);

			if (theNode != 0)
			{
				m_nodeList.push_back(theNode);
			}
		}

		// Chain up...
		NodeRefListBase::operator=(theRHS);
	}

	return *this;
}


NodeRefList&
NodeRefList::operator=(const NodeRefList&	theRHS)
{
	if (&theRHS != this)
	{
		m_nodeList = theRHS.m_nodeList;

		// Chain up...
		NodeRefListBase::operator=(theRHS);
	}

	return *this;
}


XalanNode*
NodeRefList::item(size_type		index) const
{
	assert(index < m_nodeList.size());

	return m_nodeList[index];
}


NodeRefList::size_type
NodeRefList::getLength() const
{
    assert(size_type(m_nodeList.size()) == m_nodeList.size());

	return size_type(m_nodeList.size());
}


NodeRefList::size_type
NodeRefList::indexOf(const XalanNode*	theNode) const
{
	XALAN_USING_STD(find)

	// Look for the node in the list.
	NodeListVectorType::const_iterator	i =
		find(
			m_nodeList.begin(),
			m_nodeList.end(),
			theNode);

	// If not found, return npos.  Otherwise, subtract the iterator
	// from the first iterator to get the distance between them.
	return i == m_nodeList.end() ? npos : i - m_nodeList.begin();
}


#if !defined(NDEBUG)
bool
NodeRefList::checkForDuplicates() const
{
	typedef XalanSet<const XalanNode*>	NodeSetType;

	bool	fResult = false;

	const size_type		theLength = getLength();

	if (theLength > 0)
	{
		NodeSetType		theNodes;

		for (size_type i = 0; i < theLength && fResult == false; ++i)
		{
			const XalanNode* const	theNode = item(i);

			if (theNodes.find(theNode) != theNodes.end())
			{
				fResult = true;
			}
			else
			{
				theNodes.insert(theNode);
			}
		}
	}

	return fResult;
}
#endif


XALAN_CPP_NAMESPACE_END