136 lines
3.7 KiB
C++
136 lines
3.7 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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#include "txIXPathContext.h"
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#include "txNodeSet.h"
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//-------------/
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//- UnionExpr -/
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//-------------/
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/**
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* Creates a new UnionExpr
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**/
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UnionExpr::UnionExpr() {
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//-- do nothing
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}
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/**
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* Destructor, will delete all Path Expressions
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**/
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UnionExpr::~UnionExpr() {
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txListIterator iter(&expressions);
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while (iter.hasNext()) {
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delete (Expr*)iter.next();
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}
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} //-- ~UnionExpr
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/**
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* Adds the Expr to this UnionExpr
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* @param expr the Expr to add to this UnionExpr
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**/
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nsresult
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UnionExpr::addExpr(Expr* aExpr)
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{
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nsresult rv = expressions.add(aExpr);
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if (NS_FAILED(rv)) {
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delete aExpr;
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}
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return rv;
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} //-- addExpr
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//-----------------------------/
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//- Virtual methods from Expr -/
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//-----------------------------/
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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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nsresult
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UnionExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
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{
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*aResult = nsnull;
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nsRefPtr<txNodeSet> nodes;
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nsresult rv = aContext->recycler()->getNodeSet(getter_AddRefs(nodes));
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NS_ENSURE_SUCCESS(rv, rv);
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txListIterator iter(&expressions);
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while (iter.hasNext()) {
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Expr* expr = (Expr*)iter.next();
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nsRefPtr<txAExprResult> exprResult;
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rv = expr->evaluate(aContext, getter_AddRefs(exprResult));
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NS_ENSURE_SUCCESS(rv, rv);
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if (exprResult->getResultType() != txAExprResult::NODESET) {
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//XXX ErrorReport: report nonnodeset error
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return NS_ERROR_XSLT_NODESET_EXPECTED;
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}
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nsRefPtr<txNodeSet> resultSet, ownedSet;
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resultSet = NS_STATIC_CAST(txNodeSet*,
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NS_STATIC_CAST(txAExprResult*, exprResult));
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exprResult = nsnull;
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rv = aContext->recycler()->
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getNonSharedNodeSet(resultSet, getter_AddRefs(ownedSet));
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NS_ENSURE_SUCCESS(rv, rv);
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rv = nodes->addAndTransfer(ownedSet);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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*aResult = nodes;
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NS_ADDREF(*aResult);
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return NS_OK;
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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 UnionExpr::toString(nsAString& dest) {
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txListIterator iter(&expressions);
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short count = 0;
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while (iter.hasNext()) {
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//-- set operator
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if (count > 0)
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dest.Append(NS_LITERAL_STRING(" | "));
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((Expr*)iter.next())->toString(dest);
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++count;
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}
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} //-- toString
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