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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* 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 .
*/
#ifndef INCLUDED_COMPHELPER_ANYCOMPARE_HXX
#define INCLUDED_COMPHELPER_ANYCOMPARE_HXX
#include <comphelper/comphelperdllapi.h>
#include <com/sun/star/lang/IllegalArgumentException.hpp>
#include <com/sun/star/i18n/XCollator.hpp>
#include <comphelper/extract.hxx>
#include <functional>
#include <memory>
namespace comphelper
{
//= IKeyPredicateLess
class SAL_NO_VTABLE IKeyPredicateLess
{
public:
virtual bool isLess( ::com::sun::star::uno::Any const & _lhs, ::com::sun::star::uno::Any const & _rhs ) const = 0;
virtual ~IKeyPredicateLess() {}
};
//= LessPredicateAdapter
struct LessPredicateAdapter : public ::std::binary_function< ::com::sun::star::uno::Any, ::com::sun::star::uno::Any, bool >
{
LessPredicateAdapter( const IKeyPredicateLess& _predicate )
:m_predicate( _predicate )
{
}
bool operator()( ::com::sun::star::uno::Any const & _lhs, ::com::sun::star::uno::Any const & _rhs ) const
{
return m_predicate.isLess( _lhs, _rhs );
}
private:
IKeyPredicateLess const & m_predicate;
private:
LessPredicateAdapter(); // never implemented
};
//= ScalarPredicateLess
template< typename SCALAR >
class ScalarPredicateLess : public IKeyPredicateLess
{
public:
virtual bool isLess( ::com::sun::star::uno::Any const & _lhs, ::com::sun::star::uno::Any const & _rhs ) const SAL_OVERRIDE
{
SCALAR lhs(0), rhs(0);
if ( !( _lhs >>= lhs )
|| !( _rhs >>= rhs )
)
throw ::com::sun::star::lang::IllegalArgumentException();
return lhs < rhs;
}
};
//= StringPredicateLess
class StringPredicateLess : public IKeyPredicateLess
{
public:
virtual bool isLess( ::com::sun::star::uno::Any const & _lhs, ::com::sun::star::uno::Any const & _rhs ) const SAL_OVERRIDE
{
OUString lhs, rhs;
if ( !( _lhs >>= lhs )
|| !( _rhs >>= rhs )
)
throw ::com::sun::star::lang::IllegalArgumentException();
return lhs < rhs;
}
};
//= StringCollationPredicateLess
class StringCollationPredicateLess : public IKeyPredicateLess
{
public:
StringCollationPredicateLess( ::com::sun::star::uno::Reference< ::com::sun::star::i18n::XCollator > const & i_collator )
:m_collator( i_collator )
{
}
virtual bool isLess( ::com::sun::star::uno::Any const & _lhs, ::com::sun::star::uno::Any const & _rhs ) const SAL_OVERRIDE
{
OUString lhs, rhs;
if ( !( _lhs >>= lhs )
|| !( _rhs >>= rhs )
)
throw ::com::sun::star::lang::IllegalArgumentException();
return m_collator->compareString( lhs, rhs ) < 0;
}
private:
::com::sun::star::uno::Reference< ::com::sun::star::i18n::XCollator > const m_collator;
};
//= TypePredicateLess
class TypePredicateLess : public IKeyPredicateLess
{
public:
virtual bool isLess( ::com::sun::star::uno::Any const & _lhs, ::com::sun::star::uno::Any const & _rhs ) const SAL_OVERRIDE
{
::com::sun::star::uno::Type lhs, rhs;
if ( !( _lhs >>= lhs )
|| !( _rhs >>= rhs )
)
throw ::com::sun::star::lang::IllegalArgumentException();
return lhs.getTypeName() < rhs.getTypeName();
}
};
//= EnumPredicateLess
class EnumPredicateLess : public IKeyPredicateLess
{
public:
EnumPredicateLess( ::com::sun::star::uno::Type const & _enumType )
:m_enumType( _enumType )
{
}
virtual bool isLess( ::com::sun::star::uno::Any const & _lhs, ::com::sun::star::uno::Any const & _rhs ) const SAL_OVERRIDE
{
sal_Int32 lhs(0), rhs(0);
if ( !::cppu::enum2int( lhs, _lhs )
|| !::cppu::enum2int( rhs, _rhs )
|| !_lhs.getValueType().equals( m_enumType )
|| !_rhs.getValueType().equals( m_enumType )
)
throw ::com::sun::star::lang::IllegalArgumentException();
return lhs < rhs;
}
private:
::com::sun::star::uno::Type const m_enumType;
};
//= InterfacePredicateLess
class InterfacePredicateLess : public IKeyPredicateLess
{
public:
virtual bool isLess( ::com::sun::star::uno::Any const & _lhs, ::com::sun::star::uno::Any const & _rhs ) const SAL_OVERRIDE
{
if ( ( _lhs.getValueTypeClass() != ::com::sun::star::uno::TypeClass_INTERFACE )
|| ( _rhs.getValueTypeClass() != ::com::sun::star::uno::TypeClass_INTERFACE )
)
throw ::com::sun::star::lang::IllegalArgumentException();
::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface > lhs( _lhs, ::com::sun::star::uno::UNO_QUERY );
::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface > rhs( _rhs, ::com::sun::star::uno::UNO_QUERY );
return lhs.get() < rhs.get();
}
};
//= getStandardLessPredicate
/** creates a default IKeyPredicateLess instance for the given UNO type
@param i_type
the type for which a predicate instance should be created
@param i_collator
specifies a collator instance to use, or <NULL/>. If <NULL/>, strings will be compared using the <code><</code>
operator, otherwise the collator will be used. The parameter is ignored if <arg>i_type</arg> does not specify
the string type.
@return
a default implementation of IKeyPredicateLess, which is able to compare values of the given type. If no
such default implementation is known for the given type, then <NULL/> is returned.
*/
::std::auto_ptr< IKeyPredicateLess > COMPHELPER_DLLPUBLIC
getStandardLessPredicate(
::com::sun::star::uno::Type const & i_type,
::com::sun::star::uno::Reference< ::com::sun::star::i18n::XCollator > const & i_collator
);
} // namespace comphelper
#endif // INCLUDED_COMPHELPER_ANYCOMPARE_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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