/*
 * 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.
 */

// Class header file...
#include "Function.hpp"


#include "XalanXPathException.hpp"
#include "XObjectFactory.hpp"


namespace XALAN_CPP_NAMESPACE {


Function::Function()
{
}


Function::~Function()
{
}


XObjectPtr
Function::execute(
            XPathExecutionContext&          executionContext,
            XalanNode*                      context,
            const XObjectArgVectorType&     args,
            const Locator*                  locator) const
{
    const XObjectArgVectorType::size_type   theArgCount = args.size();

    if (theArgCount == 0)
    {
        return execute(executionContext, context, locator);
    }
    else if (theArgCount == 1)
    {
        return execute(executionContext, context, args[0], locator);
    }
    else if (theArgCount == 2)
    {
        return execute(executionContext, context, args[0], args[1], locator);
    }
    else if (theArgCount == 3)
    {
        return execute(executionContext, context, args[0], args[1], args[2], locator);
    }
    else
    {
        generalError(
            executionContext,
            context,
            locator);

        return XObjectPtr(0);
    }
}


XObjectPtr
Function::execute(
            XPathExecutionContext&  executionContext,
            XalanNode*              context,            
            const Locator*          locator) const
{
    generalError(
        executionContext,
        context,
        locator);

    return XObjectPtr(0);
}


XObjectPtr
Function::execute(
            XPathExecutionContext&  executionContext,
            XalanNode*              context,            
            const XObjectPtr        /* arg1 */,
            const Locator*          locator) const
{
    generalError(
        executionContext,
        context,
        locator);

    return XObjectPtr(0);
}


XObjectPtr
Function::execute(
            XPathExecutionContext&  executionContext,
            XalanNode*              context,            
            const XObjectPtr        /* arg1 */,
            const XObjectPtr        /* arg2 */,
            const Locator*          locator) const
{
    generalError(
        executionContext,
        context,
        locator);

    return XObjectPtr(0);
}


XObjectPtr
Function::execute(
            XPathExecutionContext&  executionContext,
            XalanNode*              context,            
            const XObjectPtr        /* arg1 */,
            const XObjectPtr        /* arg2 */,
            const XObjectPtr        /* arg3 */,
            const Locator*          locator) const
{
    generalError(
        executionContext,
        context,
        locator);

    return XObjectPtr(0);
}


void
Function::generalError(
            XPathExecutionContext&  executionContext,
            const XalanNode*        context,
            const Locator*          locator) const
{
    const GetCachedString   theGuard(executionContext);

    XalanDOMString&     theErrorString = theGuard.get();

    executionContext.problem(
        XPathExecutionContext::eXPath,
        XPathExecutionContext::eError,
        getError(theErrorString),
        locator,
        context);

    throw XalanXPathException(
            theErrorString,
            theErrorString.getMemoryManager(),
            locator);
}


}