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/*
* 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.
*
* The Initial Developer of the Original Code is The MITRE Corporation.
* Portions created by MITRE are Copyright (C) 1999 The MITRE Corporation.
*
* Portions created by Keith Visco as a Non MITRE employee,
* (C) 1999 Keith Visco. All Rights Reserved.
*
* Contributor(s):
* Keith Visco, kvisco@ziplink.net
* -- original author.
*
*/
#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
/**
* Returns the String representation of this Expr.
* @param dest the String to use when creating the String
* representation. The String representation will be appended to
* any data in the destination String, to allow cascading calls to
* other #toString() methods for Expressions.
* @return the String representation of this Expr.
**/
void UnionExpr::toString(nsAString& dest) {
txListIterator iter(&expressions);
short count = 0;
while (iter.hasNext()) {
//-- set operator
if (count > 0)
dest.Append(NS_LITERAL_STRING(" | "));
((Expr*)iter.next())->toString(dest);
++count;
}
} //-- toString
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