/**************************************************************
 *
 * 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.
 *
 *************************************************************/


// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_cppuhelper.hxx"

#include <osl/mutex.hxx>

#include <cppuhelper/weakref.hxx>
#include <cppuhelper/weak.hxx>
#include <cppuhelper/stdidlclass.hxx>

#include <com/sun/star/reflection/XIdlClassProvider.hpp>
#include <com/sun/star/reflection/XIdlReflection.hpp>
#include <com/sun/star/uno/XComponentContext.hpp>
#include <com/sun/star/uno/DeploymentException.hpp>
#include <com/sun/star/beans/XPropertySet.hpp>

using namespace com::sun::star;
using namespace com::sun::star::uno;
using namespace com::sun::star::lang;
using namespace com::sun::star::reflection;
using namespace rtl;

namespace cppu {

/*---------------------------------------------------------
*	This helper class implements XIdlClass. Is used by
*	createStdIdlClass()
*---------------------------------------------------------*/
class OStdIdlClass :
			public OWeakObject,
			public XIdlClass,
			public XIdlClassProvider
{
public:
	OStdIdlClass(
					const Reference < XMultiServiceFactory > &rSMgr ,
					const OUString & sImplementationName ,
					const Reference < XIdlClass > & rSuperClass,
					const Sequence < OUString > &seq
				) SAL_THROW( () );

	// XInterface
	Any					SAL_CALL queryInterface( const ::com::sun::star::uno::Type & rType )
		throw(::com::sun::star::uno::RuntimeException);

	void 				SAL_CALL acquire() throw() 	 { OWeakObject::acquire(); }
	void 				SAL_CALL release() throw()	 { OWeakObject::release(); }

	// XIdlClassProvider
    Sequence< Reference < XIdlClass > > SAL_CALL getIdlClasses(void)
		throw (RuntimeException);

    // XIdlClass
    virtual Sequence< Reference< XIdlClass > > SAL_CALL getClasses(  ) throw(RuntimeException)
    									{ return Sequence < Reference < XIdlClass > > (); }
    virtual Reference< XIdlClass > SAL_CALL getClass( const ::rtl::OUString& ) throw(RuntimeException)
    									{ return Reference < XIdlClass > (); }
    virtual sal_Bool SAL_CALL equals( const Reference< XIdlClass >& Type ) throw(RuntimeException)
    									{ return getName() == Type->getName(); }
    virtual sal_Bool SAL_CALL isAssignableFrom( const Reference< XIdlClass >& xType ) throw(RuntimeException)
    									{ return equals( xType ); }
    virtual TypeClass SAL_CALL getTypeClass(  ) throw(RuntimeException)
    									{ return TypeClass_UNKNOWN; }
    virtual OUString SAL_CALL getName(  ) throw(RuntimeException)
    									{ return m_sImplementationName; }
    virtual Uik SAL_CALL getUik(  ) throw(RuntimeException)
    									{ return Uik(); }
    virtual Sequence< Reference< XIdlClass > > SAL_CALL getSuperclasses(  ) throw(RuntimeException)
    									{ return m_seqSuperClasses; }
    virtual Sequence< Reference< XIdlClass > > SAL_CALL getInterfaces(  ) throw(RuntimeException);

    virtual Reference< XIdlClass > SAL_CALL getComponentType(  ) throw(RuntimeException)
    									{ return Reference < XIdlClass > (); }
    virtual Reference< XIdlField > SAL_CALL getField( const ::rtl::OUString& ) throw(RuntimeException)
    									{ return Reference < XIdlField > (); }
    virtual Sequence< Reference< XIdlField > > SAL_CALL getFields(  ) throw(RuntimeException)
    									{ return Sequence< Reference < XIdlField > > (); }
    virtual Reference< XIdlMethod > SAL_CALL getMethod( const ::rtl::OUString& ) throw(RuntimeException)
    									{ return Reference < XIdlMethod > (); }
    virtual Sequence< Reference< XIdlMethod > > SAL_CALL getMethods(  ) throw(RuntimeException)
    									{ return Sequence < Reference < XIdlMethod > > (); }
    virtual Reference< XIdlArray > SAL_CALL getArray(  ) throw(RuntimeException)
    									{ return Reference < XIdlArray > (); }
    virtual void SAL_CALL createObject( Any& ) throw(RuntimeException) {}

private:
	OUString 								m_sImplementationName;
	Sequence < OUString >					m_seqSupportedInterface;
	Sequence < Reference < XIdlClass > > 	m_seqSuperClasses;
	Reference < XMultiServiceFactory >		m_rSMgr;

    Reference< XIdlReflection > m_xCorefl;
    Reference< XIdlReflection > const & get_corefl() SAL_THROW( (RuntimeException) );
};

Reference< XIdlReflection > const & OStdIdlClass::get_corefl()
    SAL_THROW( (RuntimeException) )
{
    if (! m_xCorefl.is())
    {
        if( m_rSMgr.is() )
        {
            Reference< beans::XPropertySet > xProps( m_rSMgr, UNO_QUERY );
            OSL_ASSERT( xProps.is() );
            if (xProps.is())
            {
                Reference< XComponentContext > xContext;
                xProps->getPropertyValue(
                    OUString( RTL_CONSTASCII_USTRINGPARAM("DefaultContext") ) ) >>= xContext;
                OSL_ASSERT( xContext.is() );
                if (xContext.is())
                {
                    Reference < XIdlReflection > x;
                    xContext->getValueByName(
                        OUString( RTL_CONSTASCII_USTRINGPARAM("/singletons/com.sun.star.reflection.theCoreReflection") ) ) >>= x;
                    OSL_ENSURE( x.is(), "### CoreReflection singleton not accessible!?" );

                    if (x.is())
                    {
                        ::osl::MutexGuard guard( ::osl::Mutex::getGlobalMutex() );
                        if (! m_xCorefl.is())
                        {
                            m_xCorefl = x;
                        }
                    }
                }
            }
        }
        if (! m_xCorefl.is())
        {
            throw DeploymentException(
                OUString( RTL_CONSTASCII_USTRINGPARAM("/singletons/com.sun.star.reflection.theCoreReflection singleton not accessible") ),
                Reference< XInterface >() );
        }
    }
    return m_xCorefl;
}

OStdIdlClass::OStdIdlClass(
					const Reference < XMultiServiceFactory > &rSMgr ,
					const OUString & sImplementationName ,
					const Reference < XIdlClass > & rSuperClass,
					const Sequence < OUString > &seq
						  ) SAL_THROW( () ) :
				m_sImplementationName( sImplementationName ) ,
				m_seqSupportedInterface( seq ),
				m_rSMgr( rSMgr )
{
	if( rSuperClass.is() )
		m_seqSuperClasses = Sequence< Reference < XIdlClass > >( &rSuperClass, 1 );

}

Any SAL_CALL OStdIdlClass::queryInterface( const Type & rType )
	 throw(::com::sun::star::uno::RuntimeException)
{
	Any aRet( ::cppu::queryInterface(
		rType, static_cast< XIdlClass * >( this ), static_cast< XIdlClassProvider * >( this ) ) );

	return (aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType ));
}


Sequence< Reference< XIdlClass > > SAL_CALL OStdIdlClass::getInterfaces(  ) throw(RuntimeException)
{
	int nMax = m_seqSupportedInterface.getLength();

    Reference< XIdlReflection > const & rCoreRefl = get_corefl();
    if( rCoreRefl.is() )
    {
        Sequence< Reference< XIdlClass > > seqClasses( nMax );

        for( int n = 0 ; n < nMax ; n++ )
        {
            seqClasses.getArray()[n] = rCoreRefl->forName( m_seqSupportedInterface.getArray()[n] );
        }

        return seqClasses;
	}
	return Sequence< Reference< XIdlClass > > () ;
}


// XIdlClassProvider
Sequence< Reference < XIdlClass > > SAL_CALL OStdIdlClass::getIdlClasses(void)
	throw (RuntimeException)
{
	// weak reference to cache the standard class
    static WeakReference< XIdlClass >	weakRef;

	// try to make weakref hard
	Reference < XIdlClass > r = weakRef;

	if( ! r.is() ) {
		// xidlclass has not been initialized before or has been destroyed already.
		r = ::cppu::createStandardClass(
										m_rSMgr ,
										OUString( RTL_CONSTASCII_USTRINGPARAM("com.sun.star.comp.cppuhelper.OStdIdlClass") ) ,
										Reference < XIdlClass > () ,
  										SAL_STATIC_CAST( XIdlClassProvider * , this ) ,
  										SAL_STATIC_CAST( XIdlClass * , this )
					 					);

		// store reference for later use
		weakRef = r;
	}

	return Sequence < Reference < XIdlClass > > ( &r , 1 );
}


// external constructor
XIdlClass *  SAL_CALL createStandardClassWithSequence(
					const Reference < XMultiServiceFactory > &rSMgr ,
					const OUString & sImplementationName ,
					const Reference < XIdlClass > & rSuperClass,
					const Sequence < OUString > &seqInterfaceNames )
	SAL_THROW( () )
{
	return SAL_STATIC_CAST(
						XIdlClass * ,
						new OStdIdlClass(
											rSMgr ,
											sImplementationName,
											rSuperClass,
											seqInterfaceNames
										  )
					   );
}

} //end namespace cppu