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/*
* Copyright (C) 2005 Frerich Raabe <raabe@kde.org>
* Copyright (C) 2006, 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "core/xml/XPathExpression.h"
#include "bindings/core/v8/ExceptionState.h"
#include "core/dom/ExceptionCode.h"
#include "core/xml/XPathExpressionNode.h"
#include "core/xml/XPathNSResolver.h"
#include "core/xml/XPathParser.h"
#include "core/xml/XPathResult.h"
#include "core/xml/XPathUtil.h"
#include "wtf/text/WTFString.h"
namespace blink {
using namespace XPath;
XPathExpression::XPathExpression() {}
XPathExpression* XPathExpression::createExpression(
const String& expression,
XPathNSResolver* resolver,
ExceptionState& exceptionState) {
XPathExpression* expr = XPathExpression::create();
Parser parser;
expr->m_topExpression =
parser.parseStatement(expression, resolver, exceptionState);
if (!expr->m_topExpression)
return nullptr;
return expr;
}
DEFINE_TRACE(XPathExpression) {
visitor->trace(m_topExpression);
}
XPathResult* XPathExpression::evaluate(Node* contextNode,
unsigned short type,
const ScriptValue&,
ExceptionState& exceptionState) {
if (!isValidContextNode(contextNode)) {
exceptionState.throwDOMException(
NotSupportedError, "The node provided is '" + contextNode->nodeName() +
"', which is not a valid context node type.");
return nullptr;
}
EvaluationContext evaluationContext(*contextNode);
XPathResult* result = XPathResult::create(
evaluationContext, m_topExpression->evaluate(evaluationContext));
if (evaluationContext.hadTypeConversionError) {
// It is not specified what to do if type conversion fails while evaluating
// an expression.
exceptionState.throwDOMException(
SyntaxError, "Type conversion failed while evaluating the expression.");
return nullptr;
}
if (type != XPathResult::kAnyType) {
result->convertTo(type, exceptionState);
if (exceptionState.hadException())
return nullptr;
}
return result;
}
} // namespace blink
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