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      1 /*
      2  * Copyright 2005 Frerich Raabe <raabe (at) kde.org>
      3  * Copyright (C) 2006 Apple Computer, Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #include "config.h"
     28 #include "core/xml/XPathEvaluator.h"
     29 
     30 #include "bindings/core/v8/ExceptionState.h"
     31 #include "core/dom/ExceptionCode.h"
     32 #include "core/dom/Node.h"
     33 #include "core/xml/NativeXPathNSResolver.h"
     34 #include "core/xml/XPathExpression.h"
     35 #include "core/xml/XPathResult.h"
     36 #include "core/xml/XPathUtil.h"
     37 
     38 namespace blink {
     39 
     40 using namespace XPath;
     41 
     42 PassRefPtrWillBeRawPtr<XPathExpression> XPathEvaluator::createExpression(const String& expression, PassRefPtrWillBeRawPtr<XPathNSResolver> resolver, ExceptionState& exceptionState)
     43 {
     44     return XPathExpression::createExpression(expression, resolver, exceptionState);
     45 }
     46 
     47 PassRefPtrWillBeRawPtr<XPathNSResolver> XPathEvaluator::createNSResolver(Node* nodeResolver)
     48 {
     49     return NativeXPathNSResolver::create(nodeResolver);
     50 }
     51 
     52 PassRefPtrWillBeRawPtr<XPathResult> XPathEvaluator::evaluate(const String& expression, Node* contextNode,
     53     PassRefPtrWillBeRawPtr<XPathNSResolver> resolver, unsigned short type, XPathResult* result, ExceptionState& exceptionState)
     54 {
     55     if (!contextNode) {
     56         exceptionState.throwDOMException(NotSupportedError, "The context node provided is null.");
     57         return nullptr;
     58     }
     59 
     60     if (!isValidContextNode(contextNode)) {
     61         exceptionState.throwDOMException(NotSupportedError, "The node provided is '" + contextNode->nodeName() + "', which is not a valid context node type.");
     62         return nullptr;
     63     }
     64 
     65     RefPtrWillBeRawPtr<XPathExpression> expr = createExpression(expression, resolver, exceptionState);
     66     if (exceptionState.hadException())
     67         return nullptr;
     68 
     69     return expr->evaluate(contextNode, type, result, exceptionState);
     70 }
     71 
     72 }
     73