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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 "config.h"
#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;
DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(XPathExpression);
XPathExpression::XPathExpression()
{
}
PassRefPtrWillBeRawPtr<XPathExpression> XPathExpression::createExpression(const String& expression, PassRefPtrWillBeRawPtr<XPathNSResolver> resolver, ExceptionState& exceptionState)
{
RefPtrWillBeRawPtr<XPathExpression> expr = XPathExpression::create();
Parser parser;
expr->m_topExpression = parser.parseStatement(expression, resolver, exceptionState);
if (!expr->m_topExpression)
return nullptr;
return expr.release();
}
void XPathExpression::trace(Visitor* visitor)
{
visitor->trace(m_topExpression);
}
PassRefPtrWillBeRawPtr<XPathResult> XPathExpression::evaluate(Node* contextNode, unsigned short type, XPathResult*, ExceptionState& exceptionState)
{
if (!contextNode) {
exceptionState.throwDOMException(NotSupportedError, "The context node provided is null.");
return nullptr;
}
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);
RefPtrWillBeRawPtr<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::ANY_TYPE) {
result->convertTo(type, exceptionState);
if (exceptionState.hadException())
return nullptr;
}
return result;
}
}
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