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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 <memory>
+#include <utility>
+
+
+namespace comphelper
+{
+
+
+ //= IKeyPredicateLess
+
+ class SAL_NO_VTABLE IKeyPredicateLess
+ {
+ public:
+ virtual bool isLess( css::uno::Any const & _lhs, css::uno::Any const & _rhs ) const = 0;
+ virtual ~IKeyPredicateLess() {}
+ };
+
+
+ //= LessPredicateAdapter
+
+ struct LessPredicateAdapter
+ {
+ LessPredicateAdapter( const IKeyPredicateLess& _predicate )
+ :m_predicate( _predicate )
+ {
+ }
+
+ bool operator()( css::uno::Any const & _lhs, css::uno::Any const & _rhs ) const
+ {
+ return m_predicate.isLess( _lhs, _rhs );
+ }
+
+ private:
+ IKeyPredicateLess const & m_predicate;
+ };
+
+
+ //= ScalarPredicateLess
+
+ template< typename SCALAR >
+ class ScalarPredicateLess final : public IKeyPredicateLess
+ {
+ public:
+ virtual bool isLess( css::uno::Any const & _lhs, css::uno::Any const & _rhs ) const override
+ {
+ SCALAR lhs(0), rhs(0);
+ if ( !( _lhs >>= lhs )
+ || !( _rhs >>= rhs )
+ )
+ throw css::lang::IllegalArgumentException();
+ return lhs < rhs;
+ }
+ };
+
+
+ //= StringPredicateLess
+
+ class StringPredicateLess final : public IKeyPredicateLess
+ {
+ public:
+ virtual bool isLess( css::uno::Any const & _lhs, css::uno::Any const & _rhs ) const override
+ {
+ OUString lhs, rhs;
+ if ( !( _lhs >>= lhs )
+ || !( _rhs >>= rhs )
+ )
+ throw css::lang::IllegalArgumentException();
+ return lhs < rhs;
+ }
+ };
+
+
+ //= StringCollationPredicateLess
+
+ class StringCollationPredicateLess final : public IKeyPredicateLess
+ {
+ public:
+ StringCollationPredicateLess( css::uno::Reference< css::i18n::XCollator > i_collator )
+ :m_collator(std::move( i_collator ))
+ {
+ }
+
+ virtual bool isLess( css::uno::Any const & _lhs, css::uno::Any const & _rhs ) const override
+ {
+ OUString lhs, rhs;
+ if ( !( _lhs >>= lhs )
+ || !( _rhs >>= rhs )
+ )
+ throw css::lang::IllegalArgumentException();
+ return m_collator->compareString( lhs, rhs ) < 0;
+ }
+
+ private:
+ css::uno::Reference< css::i18n::XCollator > const m_collator;
+ };
+
+
+ //= TypePredicateLess
+
+ class TypePredicateLess final : public IKeyPredicateLess
+ {
+ public:
+ virtual bool isLess( css::uno::Any const & _lhs, css::uno::Any const & _rhs ) const override
+ {
+ css::uno::Type lhs, rhs;
+ if ( !( _lhs >>= lhs )
+ || !( _rhs >>= rhs )
+ )
+ throw css::lang::IllegalArgumentException();
+ return lhs.getTypeName() < rhs.getTypeName();
+ }
+ };
+
+
+ //= EnumPredicateLess
+
+ class EnumPredicateLess final : public IKeyPredicateLess
+ {
+ public:
+ EnumPredicateLess( css::uno::Type const & _enumType )
+ :m_enumType( _enumType )
+ {
+ }
+
+ virtual bool isLess( css::uno::Any const & _lhs, css::uno::Any const & _rhs ) const 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 css::lang::IllegalArgumentException();
+ return lhs < rhs;
+ }
+
+ private:
+ css::uno::Type const m_enumType;
+ };
+
+
+ //= InterfacePredicateLess
+
+ class InterfacePredicateLess final : public IKeyPredicateLess
+ {
+ public:
+ virtual bool isLess( css::uno::Any const & _lhs, css::uno::Any const & _rhs ) const override
+ {
+ if ( ( _lhs.getValueTypeClass() != css::uno::TypeClass_INTERFACE )
+ || ( _rhs.getValueTypeClass() != css::uno::TypeClass_INTERFACE )
+ )
+ throw css::lang::IllegalArgumentException();
+
+ css::uno::Reference< css::uno::XInterface > lhs( _lhs, css::uno::UNO_QUERY );
+ css::uno::Reference< css::uno::XInterface > rhs( _rhs, css::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>&lt</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::unique_ptr< IKeyPredicateLess > COMPHELPER_DLLPUBLIC
+ getStandardLessPredicate(
+ css::uno::Type const & i_type,
+ css::uno::Reference< css::i18n::XCollator > const & i_collator
+ );
+
+ /**
+ Compare two Anys.
+ */
+ bool COMPHELPER_DLLPUBLIC anyLess( css::uno::Any const & lhs, css::uno::Any const & rhs);
+
+} // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_ANYCOMPARE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */