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author | Oliver Bolte <obo@openoffice.org> | 2004-11-16 09:49:51 +0000 |
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committer | Oliver Bolte <obo@openoffice.org> | 2004-11-16 09:49:51 +0000 |
commit | e2dd280fa5c401e5e1eb33f16c95c618b9c4419b (patch) | |
tree | dc6b36d9719a9abba898baf4621daf7e06d8c4c3 /forms/source/xforms/computedexpression.hxx | |
parent | INTEGRATION: CWS eforms2 (1.1.2); FILE ADDED (diff) | |
download | core-e2dd280fa5c401e5e1eb33f16c95c618b9c4419b.tar.gz core-e2dd280fa5c401e5e1eb33f16c95c618b9c4419b.zip |
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
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2004/06/09 08:24:45 dvo 1.1.2.6: #114856# Solaris compiler problems
(typedef names in throw clauses; include-before-forward-declaration)
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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
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2004/04/07 13:29:48 dvo 1.1.2.3: #114856# continue implementation
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2004/04/01 11:26:54 dvo 1.1.2.2: #114856# add submission
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2004/03/18 17:08:35 dvo 1.1.2.1: #114856# continue XForms implementation
Diffstat (limited to 'forms/source/xforms/computedexpression.hxx')
-rw-r--r-- | forms/source/xforms/computedexpression.hxx | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/forms/source/xforms/computedexpression.hxx b/forms/source/xforms/computedexpression.hxx new file mode 100644 index 000000000000..fe180c9f51e1 --- /dev/null +++ b/forms/source/xforms/computedexpression.hxx @@ -0,0 +1,175 @@ +/************************************************************************* + * + * $RCSfile: computedexpression.hxx,v $ + * + * $Revision: 1.2 $ + * + * last change: $Author: obo $ $Date: 2004-11-16 10:49:51 $ + * + * 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 + * License version 2.1, as published by the Free Software Foundation. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * 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 + * License at http://www.openoffice.org/license.html. + * + * Software provided under this License is provided on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, + * WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS, + * MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING. + * See the License for the specific provisions governing your rights and + * obligations concerning the Software. + * + * The Initial Developer of the Original Code is: Sun Microsystems, Inc. + * + * Copyright: 2000 by Sun Microsystems, Inc. + * + * All Rights Reserved. + * + * Contributor(s): _______________________________________ + * + * + ************************************************************************/ + +#ifndef _COMPUTEDEXPRESSION_HXX +#define _COMPUTEDEXPRESSION_HXX + + +// includes for member variables +#include <rtl/ustring.hxx> +#include <com/sun/star/uno/Reference.hxx> + +// forward declaractions +namespace com { namespace sun { namespace star +{ + namespace xml + { + namespace dom { class XNode; } + namespace dom { class XNodeset; } + namespace xpath { class XXPathAPI; } + namespace xpath { class XXPathObject; } + } + namespace container { class XNameContainer; } +} } } +namespace xforms { class EvaluationContext; } + + + +namespace xforms +{ + +/** ComputedExpression represents an XPath Expression and caches results. + * + * As this class has no virtual methods, it should never be used + * polymorphically. */ +class ComputedExpression +{ + /// the expression string + rtl::OUString msExpression; + + /// the namespaces that are used to interpret the expression string + com::sun::star::uno::Reference<com::sun::star::container::XNameContainer> mxNamespaces; + + /// is msExpression empty? + bool mbIsEmpty; + +protected: + /// is msExpression a simple expression? + bool mbIsSimple; + + /// the result from the last bind + com::sun::star::uno::Reference<com::sun::star::xml::xpath::XXPathObject> mxResult; + + + /// implementation of isSimpleExpression + bool _checkExpression( const sal_Char* pExpression ) const; + + /// allow manipulation of the expression before it is evaluated + const rtl::OUString _getExpressionForEvaluation() const; + + /// obtain a (suitable) XPathAPI implementation + com::sun::star::uno::Reference<com::sun::star::xml::xpath::XXPathAPI> _getXPathAPI(const xforms::EvaluationContext& aContext); + + /// evaluate the expression relative to the content node. + bool _evaluate( const xforms::EvaluationContext& rContext, + const rtl::OUString& sExpression ); + + +public: + ComputedExpression(); + ~ComputedExpression(); + + + /// get the expression string + rtl::OUString getExpression() const; + + /// set a new expression string + void setExpression( const rtl::OUString& rExpression ); + + /// get the namespaces that are used to interpret the expression string + com::sun::star::uno::Reference<com::sun::star::container::XNameContainer> getNamespaces() const; + + /// set the namespaces that are used to interpret the expression string + void setNamespaces( const com::sun::star::uno::Reference<com::sun::star::container::XNameContainer>& ); + + /// do we have an actual expression? + bool isEmptyExpression() const; + + /// heuristically determine whether this expression is 'simple', + /// i.e. whether its value will change depending on the values + /// of other nodes + bool isSimpleExpression() const; + + + /// evaluate the expression relative to the content node. + bool evaluate( const xforms::EvaluationContext& rContext ); + + + /// does this expression have a value? + bool hasValue() const; + + + /// remove value/evaluate results + void clear(); + + + // get the result of this expression as string/bool/... + // (Results will be based on the last call of evaluate(..). The caller + // must call evaluate to ensure current results.) + com::sun::star::uno::Reference<com::sun::star::xml::xpath::XXPathObject> getXPath(); + bool getBool( bool bDefault = false ) const; + rtl::OUString getString( const rtl::OUString& rDefault = rtl::OUString() ) const; + +}; + +} // namespace xforms + +#endif |