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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public 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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is TransforMiiX XSLT processor code.
*
* The Initial Developer of the Original Code is
* The MITRE Corporation.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Keith Visco <kvisco@ziplink.net> (Original Author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "Expr.h"
#include "txIXPathContext.h"
#include "txNodeSet.h"
//-------------/
//- UnionExpr -/
//-------------/
/**
* Creates a new UnionExpr
**/
UnionExpr::UnionExpr() {
//-- do nothing
}
/**
* Destructor, will delete all Path Expressions
**/
UnionExpr::~UnionExpr() {
txListIterator iter(&expressions);
while (iter.hasNext()) {
delete (Expr*)iter.next();
}
} //-- ~UnionExpr
/**
* Adds the Expr to this UnionExpr
* @param expr the Expr to add to this UnionExpr
**/
nsresult
UnionExpr::addExpr(Expr* aExpr)
{
nsresult rv = expressions.add(aExpr);
if (NS_FAILED(rv)) {
delete aExpr;
}
return rv;
} //-- addExpr
//-----------------------------/
//- Virtual methods from Expr -/
//-----------------------------/
/**
* Evaluates this Expr based on the given context node and processor state
* @param context the context node for evaluation of this Expr
* @param ps the ContextState containing the stack information needed
* for evaluation
* @return the result of the evaluation
**/
nsresult
UnionExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
{
*aResult = nsnull;
nsRefPtr<txNodeSet> nodes;
nsresult rv = aContext->recycler()->getNodeSet(getter_AddRefs(nodes));
NS_ENSURE_SUCCESS(rv, rv);
txListIterator iter(&expressions);
while (iter.hasNext()) {
Expr* expr = (Expr*)iter.next();
nsRefPtr<txAExprResult> exprResult;
rv = expr->evaluate(aContext, getter_AddRefs(exprResult));
NS_ENSURE_SUCCESS(rv, rv);
if (exprResult->getResultType() != txAExprResult::NODESET) {
//XXX ErrorReport: report nonnodeset error
return NS_ERROR_XSLT_NODESET_EXPECTED;
}
nsRefPtr<txNodeSet> resultSet, ownedSet;
resultSet = NS_STATIC_CAST(txNodeSet*,
NS_STATIC_CAST(txAExprResult*, exprResult));
exprResult = nsnull;
rv = aContext->recycler()->
getNonSharedNodeSet(resultSet, getter_AddRefs(ownedSet));
NS_ENSURE_SUCCESS(rv, rv);
rv = nodes->addAndTransfer(ownedSet);
NS_ENSURE_SUCCESS(rv, rv);
}
*aResult = nodes;
NS_ADDREF(*aResult);
return NS_OK;
} //-- evaluate
#ifdef TX_TO_STRING
void
UnionExpr::toString(nsAString& dest)
{
txListIterator iter(&expressions);
short count = 0;
while (iter.hasNext()) {
//-- set operator
if (count > 0)
dest.AppendLiteral(" | ");
((Expr*)iter.next())->toString(dest);
++count;
}
}
#endif
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