| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 "XPathEvaluator.hpp" |
| |
| |
| |
| #include <xalanc/DOMSupport/DOMSupportDefault.hpp> |
| |
| |
| |
| #include "ElementPrefixResolverProxy.hpp" |
| #include "XObjectFactoryDefault.hpp" |
| #include "XPathEnvSupportDefault.hpp" |
| #include "XPathConstructionContextDefault.hpp" |
| #include "XPathExecutionContextDefault.hpp" |
| #include "XPathFactoryDefault.hpp" |
| #include "XPathProcessorImpl.hpp" |
| #include "XPathInit.hpp" |
| |
| |
| |
| namespace XALAN_CPP_NAMESPACE { |
| |
| |
| |
| static XPathInit* s_xpathInit = 0; |
| |
| static MemoryManager* s_memoryManager = 0; |
| |
| void |
| XPathEvaluator::initialize(MemoryManager& theManager) |
| { |
| s_xpathInit = XPathInit::create(theManager); |
| |
| s_memoryManager = &theManager; |
| } |
| |
| |
| |
| void |
| XPathEvaluator::terminate() |
| { |
| XalanDestroy( |
| *s_memoryManager, |
| *s_xpathInit); |
| |
| s_xpathInit = 0; |
| |
| s_memoryManager = 0; |
| } |
| |
| |
| |
| XPathEvaluator::XPathEvaluator(MemoryManager& theManager) : |
| m_xobjectFactory(theManager, XObjectFactoryDefault::create(theManager)), |
| m_xpathFactory(theManager, XPathFactoryDefault::create(theManager)), |
| m_constructionContext(theManager, XPathConstructionContextDefault::create(theManager)), |
| m_executionContext(theManager, XPathExecutionContextDefault::create(theManager)), |
| m_memoryManager(theManager) |
| |
| { |
| } |
| |
| |
| |
| XPathEvaluator::~XPathEvaluator() |
| { |
| // Just in case these are still set, reset them |
| // to 0. |
| m_executionContext->setXPathEnvSupport(0); |
| |
| m_executionContext->setXObjectFactory(0); |
| |
| m_executionContext->setDOMSupport(0); |
| } |
| |
| |
| |
| XalanNode* |
| XPathEvaluator::selectSingleNode( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XalanDOMChar* xpathString, |
| const XalanElement* namespaceNode) |
| { |
| const XObjectPtr theResult( |
| evaluate( |
| domSupport, |
| contextNode, |
| xpathString, |
| namespaceNode)); |
| |
| const NodeRefListBase& theNodeList = theResult->nodeset(); |
| |
| return theNodeList.getLength() == 0 ? 0 : theNodeList.item(0); |
| } |
| |
| |
| |
| XalanNode* |
| XPathEvaluator::selectSingleNode( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XalanDOMChar* xpathString, |
| const PrefixResolver& prefixResolver) |
| { |
| const XObjectPtr theResult( |
| evaluate( |
| domSupport, |
| contextNode, |
| xpathString, |
| prefixResolver)); |
| |
| const NodeRefListBase& theNodeList = theResult->nodeset(); |
| |
| return theNodeList.getLength() == 0 ? 0 : theNodeList.item(0); |
| } |
| |
| |
| |
| XalanNode* |
| XPathEvaluator::selectSingleNode( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XPath& xpath, |
| const XalanElement* namespaceNode) |
| { |
| const XObjectPtr theResult( |
| evaluate( |
| domSupport, |
| contextNode, |
| xpath, |
| namespaceNode)); |
| |
| const NodeRefListBase& theNodeList = theResult->nodeset(); |
| |
| return theNodeList.getLength() == 0 ? 0 : theNodeList.item(0); |
| } |
| |
| |
| |
| XalanNode* |
| XPathEvaluator::selectSingleNode( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XPath& xpath, |
| const PrefixResolver& prefixResolver) |
| { |
| const XObjectPtr theResult( |
| evaluate( |
| domSupport, |
| contextNode, |
| xpath, |
| prefixResolver)); |
| |
| const NodeRefListBase& theNodeList = theResult->nodeset(); |
| |
| return theNodeList.getLength() == 0 ? 0 : theNodeList.item(0); |
| } |
| |
| |
| |
| NodeRefList& |
| XPathEvaluator::selectNodeList( |
| NodeRefList& result, |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XalanDOMChar* xpathString, |
| const XalanElement* namespaceNode) |
| { |
| const XObjectPtr theResult( |
| evaluate( |
| domSupport, |
| contextNode, |
| xpathString, |
| namespaceNode)); |
| |
| result = theResult->nodeset(); |
| |
| return result; |
| } |
| |
| |
| |
| NodeRefList& |
| XPathEvaluator::selectNodeList( |
| NodeRefList& result, |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XalanDOMChar* xpathString, |
| const PrefixResolver& prefixResolver) |
| { |
| const XObjectPtr theResult( |
| evaluate( |
| domSupport, |
| contextNode, |
| xpathString, |
| prefixResolver)); |
| |
| result = theResult->nodeset(); |
| |
| return result; |
| } |
| |
| |
| |
| NodeRefList& |
| XPathEvaluator::selectNodeList( |
| NodeRefList& result, |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XPath& xpath, |
| const XalanElement* namespaceNode) |
| { |
| const XObjectPtr theResult( |
| evaluate( |
| domSupport, |
| contextNode, |
| xpath, |
| namespaceNode)); |
| |
| result = theResult->nodeset(); |
| |
| return result; |
| } |
| |
| |
| |
| NodeRefList& |
| XPathEvaluator::selectNodeList( |
| NodeRefList& result, |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XPath& xpath, |
| const PrefixResolver& prefixResolver) |
| { |
| const XObjectPtr theResult( |
| evaluate( |
| domSupport, |
| contextNode, |
| xpath, |
| prefixResolver)); |
| |
| result = theResult->nodeset(); |
| |
| return result; |
| } |
| |
| |
| |
| XObjectPtr |
| XPathEvaluator::evaluate( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XalanDOMChar* xpathString, |
| const XalanElement* namespaceNode) |
| { |
| XPathEnvSupportDefault theEnvSupportDefault(m_memoryManager); |
| |
| const ElementPrefixResolverProxy thePrefixResolver( |
| namespaceNode, |
| theEnvSupportDefault, |
| domSupport, |
| m_memoryManager); |
| |
| return evaluate( |
| domSupport, |
| contextNode, |
| xpathString, |
| thePrefixResolver, |
| theEnvSupportDefault); |
| |
| } |
| |
| |
| |
| XObjectPtr |
| XPathEvaluator::evaluate( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XPath& xpath, |
| const XalanElement* namespaceNode) |
| { |
| XPathEnvSupportDefault theEnvSupportDefault(m_memoryManager); |
| |
| const ElementPrefixResolverProxy thePrefixResolver( |
| namespaceNode, |
| theEnvSupportDefault, |
| domSupport, |
| m_memoryManager); |
| |
| return evaluate( |
| domSupport, |
| contextNode, |
| xpath, |
| thePrefixResolver, |
| theEnvSupportDefault); |
| } |
| |
| |
| |
| XObjectPtr |
| XPathEvaluator::evaluate( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XalanDOMChar* xpathString, |
| const PrefixResolver& prefixResolver) |
| { |
| XPathEnvSupportDefault theEnvSupportDefault(m_memoryManager); |
| |
| return evaluate( |
| domSupport, |
| contextNode, |
| xpathString, |
| prefixResolver, |
| theEnvSupportDefault); |
| } |
| |
| |
| |
| XObjectPtr |
| XPathEvaluator::evaluate( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XPath& xpath, |
| const PrefixResolver& prefixResolver) |
| { |
| XPathEnvSupportDefault theEnvSupportDefault(m_memoryManager); |
| |
| return evaluate( |
| domSupport, |
| contextNode, |
| xpath, |
| prefixResolver, |
| theEnvSupportDefault); |
| } |
| |
| |
| |
| XPath* |
| XPathEvaluator::createXPath(const XalanDOMChar* xpathString) |
| { |
| DOMSupportDefault theDOMSupport(m_memoryManager); |
| |
| XPathEnvSupportDefault theEnvSupportDefault(m_memoryManager); |
| |
| const ElementPrefixResolverProxy thePrefixResolver( |
| 0, |
| theEnvSupportDefault, |
| theDOMSupport, |
| m_memoryManager); |
| |
| return createXPath(xpathString, thePrefixResolver); |
| } |
| |
| |
| |
| XPath* |
| XPathEvaluator::createXPath( |
| const XalanDOMChar* xpathString, |
| DOMSupport& domSupport, |
| const XalanElement* namespaceNode) |
| { |
| XPathEnvSupportDefault theEnvSupportDefault(m_memoryManager); |
| |
| const ElementPrefixResolverProxy thePrefixResolver( |
| namespaceNode, |
| theEnvSupportDefault, |
| domSupport, |
| m_memoryManager); |
| |
| return createXPath(xpathString, thePrefixResolver); |
| } |
| |
| |
| |
| typedef XPathConstructionContext::GetCachedString GetCachedString; |
| |
| |
| |
| XPath* |
| XPathEvaluator::createXPath( |
| const XalanDOMChar* xpathString, |
| const PrefixResolver& prefixResolver) |
| { |
| XPath* const theXPath = m_xpathFactory->create(); |
| assert(theXPath != 0); |
| |
| XPathProcessorImpl theProcessor(m_memoryManager); |
| |
| const GetCachedString theGuard(*m_constructionContext.get()); |
| |
| XalanDOMString& theTempString = theGuard.get(); |
| |
| theTempString = xpathString; |
| |
| theProcessor.initXPath( |
| *theXPath, |
| *m_constructionContext.get(), |
| theTempString, |
| prefixResolver); |
| |
| return theXPath; |
| } |
| |
| |
| |
| bool |
| XPathEvaluator::destroyXPath(XPath* theXPath) |
| { |
| assert(theXPath != 0); |
| |
| const bool theResult = m_xpathFactory->returnObject(theXPath); |
| |
| if (m_xpathFactory->getInstanceCount() == 0) |
| { |
| m_constructionContext->reset(); |
| } |
| |
| return theResult; |
| } |
| |
| |
| |
| XObjectPtr |
| XPathEvaluator::evaluate( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XalanDOMChar* xpathString, |
| const PrefixResolver& prefixResolver, |
| XPathEnvSupport& envSupport) |
| { |
| assert(contextNode != 0); |
| assert(xpathString != 0); |
| |
| // Create an XPath, and an XPathProcessorImpl to process |
| // the XPath. |
| XPath theXPath(m_memoryManager); |
| |
| XPathProcessorImpl theProcessor(m_memoryManager); |
| |
| const GetCachedString theGuard(*m_constructionContext.get()); |
| |
| XalanDOMString& theTempString = theGuard.get(); |
| |
| theTempString = xpathString; |
| |
| theProcessor.initXPath( |
| theXPath, |
| *m_constructionContext.get(), |
| theTempString, |
| prefixResolver); |
| |
| return evaluate( |
| domSupport, |
| contextNode, |
| theXPath, |
| prefixResolver, |
| envSupport); |
| } |
| |
| |
| |
| XObjectPtr |
| XPathEvaluator::evaluate( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XPath& xpath, |
| const PrefixResolver& prefixResolver, |
| XPathEnvSupport& envSupport) |
| { |
| // Reset these, in case we've been here before... |
| m_executionContext->reset(); |
| m_xobjectFactory->reset(); |
| |
| // Set up the connections between the execution context and |
| // the provided support objects... |
| m_executionContext->setXPathEnvSupport(&envSupport); |
| |
| m_executionContext->setXObjectFactory(m_xobjectFactory.get()); |
| |
| m_executionContext->setDOMSupport(&domSupport); |
| |
| // OK, evaluate the expression... |
| const XObjectPtr theResult( |
| xpath.execute( |
| contextNode, |
| prefixResolver, |
| *m_executionContext.get())); |
| |
| // Break the connectons we set... |
| m_executionContext->setXPathEnvSupport(0); |
| |
| m_executionContext->setXObjectFactory(0); |
| |
| m_executionContext->setDOMSupport(0); |
| |
| return theResult; |
| } |
| |
| |
| |
| XPathExecutionContext& |
| XPathEvaluator::getExecutionContext() |
| { |
| assert(m_executionContext.get() != 0); |
| |
| return *m_executionContext.get(); |
| } |
| |
| |
| |
| } |