third_party/WebKit/Source/core/xml/XPathEvaluator.cpp

   1 /*
   2  * Copyright 2005 Frerich Raabe <raabe@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 XPathExpression* XPathEvaluator::createExpression(const String& expression, XPathNSResolver* resolver, ExceptionState& exceptionState)
  43 {
  44     return XPathExpression::createExpression(expression, resolver, exceptionState);
  45 }
  46
  47 XPathNSResolver* XPathEvaluator::createNSResolver(Node* nodeResolver)
  48 {
  49     return NativeXPathNSResolver::create(nodeResolver);
  50 }
  51
  52 XPathResult* XPathEvaluator::evaluate(const String& expression, Node* contextNode, XPathNSResolver* resolver, unsigned short type, const ScriptValue&, ExceptionState& exceptionState)
  53 {
  54     if (!isValidContextNode(contextNode)) {
  55         exceptionState.throwDOMException(NotSupportedError, "The node provided is '" + contextNode->nodeName() + "', which is not a valid context node type.");
  56         return nullptr;
  57     }
  58
  59     XPathExpression* expr = createExpression(expression, resolver, exceptionState);
  60     if (exceptionState.hadException())
  61         return nullptr;
  62
  63     return expr->evaluate(contextNode, type, ScriptValue(), exceptionState);
  64 }
  65
  66 } // namespace blink