Source/WebCore/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 "XPathEvaluator.h"
  29
  30 #include "ExceptionCode.h"
  31 #include "NativeXPathNSResolver.h"
  32 #include "Node.h"
  33 #include "XPathExpression.h"
  34 #include "XPathResult.h"
  35 #include "XPathUtil.h"
  36
  37 namespace WebCore {
  38
  39 using namespace XPath;
  40
  41 PassRefPtr<XPathExpression> XPathEvaluator::createExpression(const String& expression,
  42                                                              XPathNSResolver* resolver,
  43                                                              ExceptionCode& ec)
  44 {
  45     return XPathExpression::createExpression(expression, resolver, ec);
  46 }
  47
  48 PassRefPtr<XPathNSResolver> XPathEvaluator::createNSResolver(Node* nodeResolver)
  49 {
  50     return NativeXPathNSResolver::create(nodeResolver);
  51 }
  52
  53 PassRefPtr<XPathResult> XPathEvaluator::evaluate(const String& expression,
  54                                                  Node* contextNode,
  55                                                  XPathNSResolver* resolver,
  56                                                  unsigned short type,
  57                                                  XPathResult* result,
  58                                                  ExceptionCode& ec)
  59 {
  60     if (!isValidContextNode(contextNode)) {
  61         ec = NOT_SUPPORTED_ERR;
  62         return 0;
  63     }
  64
  65     ec = 0;
  66     RefPtr<XPathExpression> expr = createExpression(expression, resolver, ec);
  67     if (ec)
  68         return 0;
  69
  70     return expr->evaluate(contextNode, type, result, ec);
  71 }
  72
  73 }