| /* |
| * Copyright 1999-2004 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #include "FunctionDistinct.hpp" |
| |
| |
| |
| #include <xalanc/Include/XalanSet.hpp> |
| |
| |
| |
| #include <xalanc/XalanDOM/XalanDOMString.hpp> |
| |
| |
| |
| #include <xalanc/PlatformSupport/XalanMessageLoader.hpp> |
| #include <xalanc/PlatformSupport/DOMStringHelper.hpp> |
| |
| |
| |
| #include <xalanc/DOMSupport/DOMServices.hpp> |
| |
| |
| |
| #include <xalanc/XPath/XPathExecutionContext.hpp> |
| #include <xalanc/XPath/XObjectFactory.hpp> |
| |
| |
| |
| XALAN_CPP_NAMESPACE_BEGIN |
| |
| |
| |
| FunctionDistinct::FunctionDistinct() |
| { |
| } |
| |
| |
| |
| FunctionDistinct::~FunctionDistinct() |
| { |
| } |
| |
| |
| |
| XObjectPtr |
| FunctionDistinct::execute( |
| XPathExecutionContext& executionContext, |
| XalanNode* context, |
| const XObjectArgVectorType& args, |
| const LocatorType* locator) const |
| { |
| if (args.size() != 1) |
| { |
| executionContext.error(getError(), context, locator); |
| } |
| |
| assert(args[0].null() == false); |
| |
| const NodeRefListBase& nodeset = args[0]->nodeset(); |
| |
| typedef XPathExecutionContext::BorrowReturnMutableNodeRefList BorrowReturnMutableNodeRefList; |
| |
| BorrowReturnMutableNodeRefList theResult(executionContext); |
| |
| const NodeRefListBase::size_type theLength = nodeset.getLength(); |
| |
| if (theLength == 1) |
| { |
| theResult->addNode(nodeset.item(0)); |
| } |
| else if (theLength > 1) |
| { |
| typedef XPathExecutionContext::GetAndReleaseCachedString GetAndReleaseCachedString; |
| |
| GetAndReleaseCachedString theGuard(executionContext); |
| |
| XalanDOMString& theCachedString = theGuard.get(); |
| |
| |
| typedef XalanSet<XalanDOMString> SetType; |
| |
| SetType theStrings; |
| |
| // Check to make sure each node has a unique |
| // string value. |
| for (NodeRefListBase::size_type i = 0; i < theLength; ++i) |
| { |
| XalanNode* const theNode = nodeset.item(i); |
| assert(theNode != 0); |
| |
| DOMServices::getNodeData(*theNode, theCachedString); |
| |
| if (theStrings.find(theCachedString) == theStrings.end()) |
| { |
| theResult->addNodeInDocOrder(theNode, executionContext); |
| |
| theStrings.insert(theCachedString); |
| } |
| |
| clear(theCachedString); |
| } |
| } |
| |
| theResult->setDocumentOrder(); |
| |
| return executionContext.getXObjectFactory().createNodeSet(theResult); |
| } |
| |
| |
| |
| #if defined(XALAN_NO_COVARIANT_RETURN_TYPE) |
| Function* |
| #else |
| FunctionDistinct* |
| #endif |
| FunctionDistinct::clone() const |
| { |
| return new FunctionDistinct(*this); |
| } |
| |
| |
| |
| const XalanDOMString |
| FunctionDistinct::getError() const |
| { |
| |
| return XalanMessageLoader::getMessage(XalanMessages::FunctionAcceptsOneArgument_1Param,"distinct()"); |
| |
| } |
| |
| |
| |
| XALAN_CPP_NAMESPACE_END |