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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
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 * 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
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_ucbhelper.hxx"
#include <ucbhelper/interceptedinteraction.hxx>

//_______________________________________________
// includes

//_______________________________________________
// namespace

namespace ucbhelper{

namespace css = ::com::sun::star;

//_______________________________________________
// definitions

/*-----------------------------------------------
    17.03.2004 11:00
-----------------------------------------------*/
InterceptedInteraction::InterceptedInteraction()
{
}

/*-----------------------------------------------
    17.03.2004 14:55
-----------------------------------------------*/
void InterceptedInteraction::setInterceptedHandler(const css::uno::Reference< css::task::XInteractionHandler >& xInterceptedHandler)
{
    m_xInterceptedHandler = xInterceptedHandler;
}

/*-----------------------------------------------
    17.03.2004 14:55
-----------------------------------------------*/
void InterceptedInteraction::setInterceptions(const ::std::vector< InterceptedRequest >& lInterceptions)
{
    m_lInterceptions = lInterceptions; 
}

/*-----------------------------------------------
    18.03.2004 10:10
-----------------------------------------------*/
InterceptedInteraction::EInterceptionState InterceptedInteraction::intercepted(
    const InterceptedRequest&,
    const ::com::sun::star::uno::Reference< ::com::sun::star::task::XInteractionRequest >&)
{
    // default behaviour! see impl_interceptRequest() for further informations ...
    return E_NOT_INTERCEPTED;
}

/*-----------------------------------------------
    18.03.2004 09:46
-----------------------------------------------*/
css::uno::Reference< css::task::XInteractionContinuation > InterceptedInteraction::extractContinuation(const css::uno::Sequence< css::uno::Reference< css::task::XInteractionContinuation > >& lContinuations,
                                                                                                       const css::uno::Type&                                                                   aType         )
{
    const css::uno::Reference< css::task::XInteractionContinuation >* pContinuations = lContinuations.getConstArray();
    
    sal_Int32 c = lContinuations.getLength();
    sal_Int32 i = 0;
    
    for (i=0; i<c; ++i)
    {
        css::uno::Reference< css::uno::XInterface > xCheck(pContinuations[i], css::uno::UNO_QUERY);
        if (xCheck->queryInterface(aType).hasValue())
            return pContinuations[i];
    }
    
    return css::uno::Reference< css::task::XInteractionContinuation >(); 
}

/*-----------------------------------------------
    18.03.2004 10:03
-----------------------------------------------*/
void SAL_CALL InterceptedInteraction::handle(const css::uno::Reference< css::task::XInteractionRequest >& xRequest)
    throw(css::uno::RuntimeException)
{
    impl_handleDefault(xRequest);
}

/*-----------------------------------------------
    18.03.2004 10:02
-----------------------------------------------*/
void InterceptedInteraction::impl_handleDefault(const ::com::sun::star::uno::Reference< ::com::sun::star::task::XInteractionRequest >& xRequest)
{
    EInterceptionState eState = impl_interceptRequest(xRequest);
    
    switch(eState)
    {
        case E_NOT_INTERCEPTED:
        {
            // Non of the intercepted requests match to the given one.
            // => forward request to the internal wrapped handler - if there is one.
            if (m_xInterceptedHandler.is())
                m_xInterceptedHandler->handle(xRequest);
        }
        break;
        
        case E_NO_CONTINUATION_FOUND:
        {
            // Runtime error! The defined continuation could not be located
            // inside the set of available containuations of the incoming request.
            // Whats wrong - the interception list or the request?
            OSL_ENSURE(sal_False, "InterceptedInteraction::handle()\nCould intercept this interaction request - but cant locate the right continuation!");
        }
        break;
        
        case E_INTERCEPTED:
        break;
    }
}

/*-----------------------------------------------
    18.03.2004 09:48
-----------------------------------------------*/
InterceptedInteraction::EInterceptionState InterceptedInteraction::impl_interceptRequest(const ::com::sun::star::uno::Reference< ::com::sun::star::task::XInteractionRequest >& xRequest)
{
    css::uno::Any                                                                    aRequest       = xRequest->getRequest();
    css::uno::Type                                                                   aRequestType   = aRequest.getValueType();
    css::uno::Sequence< css::uno::Reference< css::task::XInteractionContinuation > > lContinuations = xRequest->getContinuations();
    
    // check against the list of static requests
    sal_Int32 nHandle = 0;
    ::std::vector< InterceptedRequest >::const_iterator pIt;
    for (  pIt  = m_lInterceptions.begin();
           pIt != m_lInterceptions.end()  ;
         ++pIt                            )
    {
        const InterceptedRequest& rInterception = *pIt;
        css::uno::Type aInterceptedType = rInterception.Request.getValueType(); 
        
        // check the request
        sal_Bool bMatch = sal_False;
        if (rInterception.MatchExact)
            bMatch = aInterceptedType.equals(aRequestType);
        else
            bMatch = aInterceptedType.isAssignableFrom(aRequestType); // dont change intercepted and request type here -> it will check the wrong direction!
        
        // intercepted ...
        // Call they might existing derived class, so they can handle that by its own.
        // If its not interested on that (may be its not overwritten and the default implementation
        // returns E_NOT_INTERCEPTED as default) -> break this loop and search for the right continuation.
        if (bMatch)
        {
            EInterceptionState eState = intercepted(rInterception, xRequest);
            if (eState == E_NOT_INTERCEPTED)
                break;
            return eState;
        }
        
        ++nHandle;        
    }
    
    if (pIt != m_lInterceptions.end()) // => can be true only if bMatch=TRUE!
    {
        // match -> search required continuation
        const InterceptedRequest& rInterception = *pIt;
        css::uno::Reference< css::task::XInteractionContinuation > xContinuation = InterceptedInteraction::extractContinuation(lContinuations, rInterception.Continuation);
        if (xContinuation.is())
        {
            xContinuation->select();
            return E_INTERCEPTED;
        }
        
        // Can be reached only, if the request does not support the given continuation!
        // => RuntimeError!?
        return E_NO_CONTINUATION_FOUND;
    }
    
    return E_NOT_INTERCEPTED;
}

} // namespace ucbhelper