/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.
 */
#if !defined(XALAN_SelectionEvent_HEADER_GUARD)
#define XALAN_SelectionEvent_HEADER_GUARD


// Base include file.  Must be first.
#include <xalanc/XSLT/XSLTDefinitions.hpp>


#include <xalanc/XalanDOM/XalanDOMString.hpp>


#include <xalanc/XPath/XObject.hpp>


namespace XALAN_CPP_NAMESPACE {


class XalanNode;
class ElemTemplateElement;
class StylesheetExecutionContext;
class XPath;


class XALAN_XSLT_EXPORT SelectionEvent
{
public:

    /**
     * Create an event originating at the given node of the style tree.
     *
     * @param executionContext The current execution context
     * @param sourceNode The source node selected.
     * @param styleNode The node in the style tree reference for the event
     * @param attributeName The attribute name where the XPath expression was supplied
     * @param xpath The XPath instance executed
     * @param selection The result of evaluating the XPath
     *
     */
    SelectionEvent(
            StylesheetExecutionContext&     executionContext,
            const XalanNode*                sourceNode,
            const ElemTemplateElement&      styleNode,
            const XalanDOMString&           attributeName,
            const XPath&                    xpath,
            const XObjectPtr                selection);

    /**
     * Create an event originating at the given node of the style tree.
     *
     * @param executionContext The current execution context
     * @param sourceNode The source node selected.
     * @param styleNode The node in the style tree reference for the event
     * @param attributeName The attribute name where the XPath expression was supplied
     * @param xpathExpression The XPath expression executed
     * @param selection The result of evaluating the XPath
     *
     */
    SelectionEvent(
            StylesheetExecutionContext&     executionContext,
            const XalanNode*                sourceNode,
            const ElemTemplateElement&      styleNode,
            const XalanDOMString&           attributeName,
            const XalanDOMString&           xpathExpression,
            const XObjectPtr                selection);

    /**
     * Create an event originating at the given node of the style tree.
     *
     * @param executionContext The current execution context
     * @param sourceNode The source node selected.
     * @param styleNode The node in the style tree reference for the event
     * @param attributeName The attribute name where the XPath expression was supplied
     * @param xpath The XPath instance executed
     * @param selection The result of evaluating the XPath
     *
     */
    SelectionEvent(
            StylesheetExecutionContext&     executionContext,
            const XalanNode*                sourceNode,
            const ElemTemplateElement&      styleNode,
            const XalanDOMString&           attributeName,
            const XPath&                    xpath,
            bool                            selection);

    /**
     * Create an event originating at the given node of the style tree.
     *
     * @param executionContext The current execution context
     * @param sourceNode The source node selected.
     * @param styleNode The node in the style tree reference for the event
     * @param attributeName The attribute name where the XPath expression was supplied
     * @param xpath The XPath instance executed
     * @param selection The result of evaluating the XPath
     *
     */
    SelectionEvent(
            StylesheetExecutionContext&     executionContext,
            const XalanNode*                sourceNode,
            const ElemTemplateElement&      styleNode,
            const XalanDOMString&           attributeName,
            const XPath&                    xpath,
            const NodeRefListBase&          selection);

    virtual
    ~SelectionEvent();

    enum eSelectionType { eNone, eBoolean, eNodeSet, eUnknown };

    /**
     * The executionContext instance.
     */
    const StylesheetExecutionContext&   m_executionContext;

    /**
     * The current context node.
     */
    const XalanNode*                    m_sourceNode;
  
    /**
     * The node in the style tree where the event occurs.
     */
    const ElemTemplateElement&          m_styleNode;

    /**
     * The attribute name from which the selection is made.
     */
    const XalanDOMString&               m_attributeName;

    /**
     * The XPath expression evaluated.
     */
    const XalanDOMString&               m_xpathExpression;
  
    /**
     * The result of the selection.  If it's null, m_sourceNode
     * was selected, or some specific type was selected.  See
     * the above enums.
     */
    const XObjectPtr                    m_selection;

    /**
     * The type of the selection.
     */
    const eSelectionType                m_type;

    bool                                m_boolean;

    const NodeRefListBase* const        m_nodeList;

private:

    // Unimplemented...
    SelectionEvent&
    operator=(const SelectionEvent& other);
};


}


#endif  //XALAN_SelectionEvent_HEADER_GUARD