INTEGRATION: CWS eforms2 (1.1.2); FILE ADDED
2004/08/09 17:33:48 dvo 1.1.2.8: #i31958# stop listening when mdoel is reset 2004/08/06 16:18:14 dvo 1.1.2.7: #i31958# continue XForms implementation Issue number: Submitted by: Reviewed by: 2004/06/09 08:24:45 dvo 1.1.2.6: #114856# Solaris compiler problems (typedef names in throw clauses; include-before-forward-declaration) Issue number: Submitted by: Reviewed by: 2004/05/13 11:59:12 lo 1.1.2.5: #i28981# xforms xpath functions 2004/04/22 09:13:35 dvo 1.1.2.4: #114856# improve dynamic binding capability Issue number: Submitted by: Reviewed by: 2004/04/07 13:29:48 dvo 1.1.2.3: #114856# continue implementation Issue number: Submitted by: Reviewed by: 2004/04/01 11:26:54 dvo 1.1.2.2: #114856# add submission Issue number: Submitted by: Reviewed by: 2004/03/18 17:08:35 dvo 1.1.2.1: #114856# continue XForms implementation
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Oliver Bolte
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175
forms/source/xforms/computedexpression.hxx
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175
forms/source/xforms/computedexpression.hxx
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/*************************************************************************
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*
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* $RCSfile: computedexpression.hxx,v $
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*
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* $Revision: 1.2 $
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*
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* last change: $Author: obo $ $Date: 2004-11-16 10:49:51 $
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*
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* The Contents of this file are made available subject to the terms of
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* either of the following licenses
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*
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* - GNU Lesser General Public License Version 2.1
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* - Sun Industry Standards Source License Version 1.1
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*
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* Sun Microsystems Inc., October, 2000
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2000 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*
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* Sun Industry Standards Source License Version 1.1
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* =================================================
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* The contents of this file are subject to the Sun Industry Standards
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* Source License Version 1.1 (the "License"); You may not use this file
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* except in compliance with the License. You may obtain a copy of the
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* License at http://www.openoffice.org/license.html.
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*
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* Software provided under this License is provided on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
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* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
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* See the License for the specific provisions governing your rights and
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* obligations concerning the Software.
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*
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* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
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*
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* Copyright: 2000 by Sun Microsystems, Inc.
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*
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* All Rights Reserved.
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*
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* Contributor(s): _______________________________________
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*
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*
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************************************************************************/
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#ifndef _COMPUTEDEXPRESSION_HXX
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#define _COMPUTEDEXPRESSION_HXX
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// includes for member variables
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#include <rtl/ustring.hxx>
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#include <com/sun/star/uno/Reference.hxx>
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// forward declaractions
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namespace com { namespace sun { namespace star
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{
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namespace xml
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{
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namespace dom { class XNode; }
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namespace dom { class XNodeset; }
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namespace xpath { class XXPathAPI; }
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namespace xpath { class XXPathObject; }
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}
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namespace container { class XNameContainer; }
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} } }
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namespace xforms { class EvaluationContext; }
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namespace xforms
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{
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/** ComputedExpression represents an XPath Expression and caches results.
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*
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* As this class has no virtual methods, it should never be used
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* polymorphically. */
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class ComputedExpression
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{
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/// the expression string
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rtl::OUString msExpression;
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/// the namespaces that are used to interpret the expression string
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com::sun::star::uno::Reference<com::sun::star::container::XNameContainer> mxNamespaces;
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/// is msExpression empty?
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bool mbIsEmpty;
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protected:
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/// is msExpression a simple expression?
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bool mbIsSimple;
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/// the result from the last bind
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com::sun::star::uno::Reference<com::sun::star::xml::xpath::XXPathObject> mxResult;
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/// implementation of isSimpleExpression
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bool _checkExpression( const sal_Char* pExpression ) const;
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/// allow manipulation of the expression before it is evaluated
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const rtl::OUString _getExpressionForEvaluation() const;
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/// obtain a (suitable) XPathAPI implementation
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com::sun::star::uno::Reference<com::sun::star::xml::xpath::XXPathAPI> _getXPathAPI(const xforms::EvaluationContext& aContext);
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/// evaluate the expression relative to the content node.
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bool _evaluate( const xforms::EvaluationContext& rContext,
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const rtl::OUString& sExpression );
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public:
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ComputedExpression();
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~ComputedExpression();
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/// get the expression string
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rtl::OUString getExpression() const;
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/// set a new expression string
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void setExpression( const rtl::OUString& rExpression );
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/// get the namespaces that are used to interpret the expression string
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com::sun::star::uno::Reference<com::sun::star::container::XNameContainer> getNamespaces() const;
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/// set the namespaces that are used to interpret the expression string
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void setNamespaces( const com::sun::star::uno::Reference<com::sun::star::container::XNameContainer>& );
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/// do we have an actual expression?
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bool isEmptyExpression() const;
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/// heuristically determine whether this expression is 'simple',
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/// i.e. whether its value will change depending on the values
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/// of other nodes
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bool isSimpleExpression() const;
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/// evaluate the expression relative to the content node.
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bool evaluate( const xforms::EvaluationContext& rContext );
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/// does this expression have a value?
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bool hasValue() const;
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/// remove value/evaluate results
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void clear();
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// get the result of this expression as string/bool/...
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// (Results will be based on the last call of evaluate(..). The caller
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// must call evaluate to ensure current results.)
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com::sun::star::uno::Reference<com::sun::star::xml::xpath::XXPathObject> getXPath();
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bool getBool( bool bDefault = false ) const;
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rtl::OUString getString( const rtl::OUString& rDefault = rtl::OUString() ) const;
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};
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} // namespace xforms
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#endif
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