100 lines
3.2 KiB
C++
100 lines
3.2 KiB
C++
/*
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* The contents of this file are subject to the Mozilla Public
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* 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
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is TransforMiiX XSLT processor.
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*
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* The Initial Developer of the Original Code is The MITRE Corporation.
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* Portions created by MITRE are Copyright (C) 1999 The MITRE Corporation.
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*
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* Portions created by Keith Visco as a Non MITRE employee,
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* (C) 1999 Keith Visco. All Rights Reserved.
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*
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* Contributor(s):
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* Keith Visco, kvisco@ziplink.net
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* -- original author.
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*
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*/
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#include "Expr.h"
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//-------------------/
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//- VariableRefExpr -/
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//-------------------/
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/**
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* Creates a VariableRefExpr with the given variable name
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**/
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VariableRefExpr::VariableRefExpr(const String& name) {
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this->name = name;
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} //-- VariableRefExpr
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/**
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* Evaluates this Expr based on the given context node and processor state
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* @param context the context node for evaluation of this Expr
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* @param ps the ContextState containing the stack information needed
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* for evaluation
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* @return the result of the evaluation
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**/
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ExprResult* VariableRefExpr::evaluate(Node* context, ContextState* cs) {
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ExprResult* exprResult = cs->getVariable(name);
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//-- make copy to prevent deletetion
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//-- I know, I should add a #copy method to ExprResult, I will
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ExprResult* copyOfResult = 0;
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if ( exprResult ) {
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switch ( exprResult->getResultType() ) {
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//-- BooleanResult
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case ExprResult::BOOLEAN :
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copyOfResult = new BooleanResult(exprResult->booleanValue());
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break;
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//-- NodeSet
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case ExprResult::NODESET :
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{
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NodeSet* src = (NodeSet*)exprResult;
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NodeSet* dest = new NodeSet(src->size());
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for ( int i = 0; i < src->size(); i++)
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dest->add(src->get(i));
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copyOfResult = dest;
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break;
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}
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//-- NumberResult
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case ExprResult::NUMBER :
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copyOfResult = new NumberResult(exprResult->numberValue());
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break;
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//-- StringResult
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default:
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String tmp;
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exprResult->stringValue(tmp);
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StringResult* strResult = new StringResult(tmp);
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copyOfResult = strResult;
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break;
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}
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}
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else copyOfResult = new StringResult();
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return copyOfResult;
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} //-- evaluate
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/**
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* Returns the String representation of this Expr.
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* @param dest the String to use when creating the String
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* representation. The String representation will be appended to
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* any data in the destination String, to allow cascading calls to
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* other #toString() methods for Expressions.
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* @return the String representation of this Expr.
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**/
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void VariableRefExpr::toString(String& str) {
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str.append('$');
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str.append(name);
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} //-- toString
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