85 lines
2.4 KiB
C++
85 lines
2.4 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 XSL:P XSLT processor.
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*
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* The Initial Developer of the Original Code is Keith Visco.
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* Portions created by Keith Visco (C) 1999, 2000 Keith Visco.
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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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* Keith Visco, kvisco@ziplink.net
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* -- original author.
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*
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*/
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#include "XSLTFunctions.h"
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#include "Names.h"
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/*
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Implementation of XSLT 1.0 extension function: generate-id
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*/
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/**
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* Creates a new generate-id function call
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**/
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GenerateIdFunctionCall::GenerateIdFunctionCall(DOMHelper* domHelper) : FunctionCall(GENERATE_ID_FN)
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{
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this->domHelper = domHelper;
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} //-- GenerateIdFunctionCall
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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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* @see FunctionCall.h
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**/
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ExprResult* GenerateIdFunctionCall::evaluate(Node* context, ContextState* cs) {
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Node* node = context;
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int argc = params.getLength();
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StringResult* stringResult = 0;
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if (argc > 0) {
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ListIterator* iter = params.iterator();
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Expr* param = (Expr*) iter->next();
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delete iter;
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ExprResult* exprResult = param->evaluate(context, cs);
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if (!exprResult) return new StringResult("");
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if (exprResult->getResultType() == ExprResult::NODESET) {
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NodeSet* nodes = (NodeSet*) exprResult;
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if (nodes->size() == 0)
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stringResult = new StringResult("");
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else
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node = nodes->get(0);
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}
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else {
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String err("Invalid argument passed to generate-id(), expecting NodeSet");
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stringResult = new StringResult(err);
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}
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delete exprResult;
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}
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if (stringResult) return stringResult;
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//-- generate id for selected node
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String id;
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domHelper->generateId(node, id);
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return new StringResult(id);
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} //-- evaluate
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