/*************************************************************************
 *
 *  $RCSfile: xmlnamespaces.cxx,v $
 *
 *  $Revision: 1.2 $
 *
 *  last change: $Author: kz $ $Date: 2004-02-25 17:56:17 $
 *
 *  The Contents of this file are made available subject to the terms of
 *  either of the following licenses
 *
 *         - GNU Lesser General Public License Version 2.1
 *         - Sun Industry Standards Source License Version 1.1
 *
 *  Sun Microsystems Inc., October, 2000
 *
 *  GNU Lesser General Public License Version 2.1
 *  =============================================
 *  Copyright 2000 by Sun Microsystems, Inc.
 *  901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
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 *  Lesser General Public License for more details.
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 *  MA  02111-1307  USA
 *
 *
 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
 *  The contents of this file are subject to the Sun Industry Standards
 *  Source License Version 1.1 (the "License"); You may not use this file
 *  except in compliance with the License. You may obtain a copy of the
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 ************************************************************************/

#include <xml/xmlnamespaces.hxx>

using namespace ::rtl;
using namespace ::com::sun::star::xml::sax;
using namespace ::com::sun::star::uno;

const OUString aXMLAttributeNamespace( RTL_CONSTASCII_USTRINGPARAM( "xmlns" ));

namespace framework
{

XMLNamespaces::XMLNamespaces()
{
}

XMLNamespaces::XMLNamespaces( const XMLNamespaces& aXMLNamespaces )
{
    m_aDefaultNamespace = aXMLNamespaces.m_aDefaultNamespace;
    m_aNamespaceMap = aXMLNamespaces.m_aNamespaceMap;
}

XMLNamespaces::~XMLNamespaces()
{
}

void XMLNamespaces::addNamespace( const OUString& aName, const OUString& aValue ) throw( SAXException )
{
    NamespaceMap::iterator p;
    OUString aNamespaceName( aName );
    sal_Int32 nXMLNamespaceLength = aXMLAttributeNamespace.getLength();

    // delete preceding "xmlns"
    if ( aNamespaceName.compareTo( aXMLAttributeNamespace, nXMLNamespaceLength ) == 0 )
    {
        if ( aNamespaceName.getLength() == nXMLNamespaceLength )
        {
            aNamespaceName = OUString();
        }
        else if ( aNamespaceName.getLength() >= nXMLNamespaceLength+2 )
        {
            aNamespaceName = aNamespaceName.copy( nXMLNamespaceLength+1 );
        }
        else
        {
            // a xml namespace without name is not allowed (e.g. "xmlns:" )
            OUString aErrorMessage( RTL_CONSTASCII_USTRINGPARAM( "A xml namespace without name is not allowed!" ));
            throw SAXException( aErrorMessage, Reference< XInterface >(), Any() );
        }
    }

    if ( aValue.getLength() == 0 && aNamespaceName.getLength() > 0 )
    {
        // namespace should be reseted - as xml draft states this is only allowed
        // for the default namespace - check and throw exception if check fails
        OUString aErrorMessage( RTL_CONSTASCII_USTRINGPARAM( "Clearing xml namespace only allowed for default namespace!" ));
        throw SAXException( aErrorMessage, Reference< XInterface >(), Any() );
    }
    else
    {
        if ( aNamespaceName.getLength() == 0 )
            m_aDefaultNamespace = aValue;
        else
        {
            p = m_aNamespaceMap.find( aNamespaceName );
            if ( p != m_aNamespaceMap.end() )
            {
                // replace current namespace definition
                m_aNamespaceMap.erase( p );
                m_aNamespaceMap.insert( NamespaceMap::value_type( aNamespaceName, aValue ));
            }
            else
            {
                m_aNamespaceMap.insert( NamespaceMap::value_type( aNamespaceName, aValue ));
            }
        }
    }
}

OUString XMLNamespaces::applyNSToAttributeName( const OUString& aName ) const throw( SAXException )
{
    // xml draft: there is no default namespace for attributes!

    int index;
    if (( index = aName.indexOf( ':' )) > 0 )
    {
        if ( aName.getLength() > index+1 )
        {
            OUString aAttributeName = getNamespaceValue( aName.copy( 0, index ) );
            aAttributeName += OUString::createFromAscii( "^" );
            aAttributeName += aName.copy( index+1 );
            return aAttributeName;
        }
        else
        {
            // attribute with namespace but without name "namespace:" is not allowed!!
            OUString aErrorMessage( RTL_CONSTASCII_USTRINGPARAM( "Attribute has no name only preceding namespace!" ));
            throw SAXException( aErrorMessage, Reference< XInterface >(), Any() );
        }
    }

    return aName;
}

OUString XMLNamespaces::applyNSToElementName( const OUString& aName ) const throw( SAXException )
{
    // xml draft: element names can have a default namespace

    int         index = aName.indexOf( ':' );
    OUString    aNamespace;
    OUString    aElementName = aName;

    if ( index > 0 )
        aNamespace = getNamespaceValue( aName.copy( 0, index ) );
    else
        aNamespace = m_aDefaultNamespace;

    if ( aNamespace.getLength() > 0 )
    {
        aElementName = aNamespace;
        aElementName += OUString::createFromAscii( "^" );
    }
    else
        return aName;

    if ( index > 0 )
    {
        if ( aName.getLength() > index+1 )
            aElementName += aName.copy( index+1 );
        else
        {
            // attribute with namespace but without a name is not allowed (e.g. "cfg:" )
            OUString aErrorMessage( RTL_CONSTASCII_USTRINGPARAM( "Attribute has no name only preceding namespace!" ));
            throw SAXException( aErrorMessage, Reference< XInterface >(), Any() );
        }
    }
    else
        aElementName += aName;

    return aElementName;
}

OUString XMLNamespaces::getNamespaceValue( const OUString& aNamespace ) const throw( SAXException )
{
    if ( aNamespace.getLength() == 0 )
        return m_aDefaultNamespace;
    else
    {
        NamespaceMap::const_iterator p;
        p = m_aNamespaceMap.find( aNamespace );
        if ( p != m_aNamespaceMap.end() )
            return p->second;
        else
        {
            // namespace not defined => throw exception!
            OUString aErrorMessage( RTL_CONSTASCII_USTRINGPARAM( "XML namespace used but not defined!" ));
            throw SAXException( aErrorMessage, Reference< XInterface >(), Any() );
        }
    }
}

}
