| /* |
| * 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 "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" |
| |
| |
| |
| XALAN_CPP_NAMESPACE_BEGIN |
| |
| |
| |
| static XPathInit* theXPathInit = 0; |
| |
| |
| |
| void |
| XPathEvaluator::initialize() |
| { |
| theXPathInit = new XPathInit; |
| } |
| |
| |
| |
| void |
| XPathEvaluator::terminate() |
| { |
| delete theXPathInit; |
| |
| theXPathInit = 0; |
| } |
| |
| |
| |
| XPathEvaluator::XPathEvaluator() : |
| m_xobjectFactory(new XObjectFactoryDefault), |
| m_xpathFactory(new XPathFactoryDefault), |
| m_constructionContext(new XPathConstructionContextDefault), |
| m_executionContext(new XPathExecutionContextDefault) |
| |
| { |
| } |
| |
| |
| |
| 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( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XalanDOMChar* xpathString, |
| const XalanElement* namespaceNode) |
| { |
| const XObjectPtr theResult( |
| evaluate( |
| domSupport, |
| contextNode, |
| xpathString, |
| namespaceNode)); |
| |
| return NodeRefList(theResult->nodeset()); |
| } |
| |
| |
| |
| NodeRefList |
| XPathEvaluator::selectNodeList( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XalanDOMChar* xpathString, |
| const PrefixResolver& prefixResolver) |
| { |
| const XObjectPtr theResult( |
| evaluate( |
| domSupport, |
| contextNode, |
| xpathString, |
| prefixResolver)); |
| |
| return NodeRefList(theResult->nodeset()); |
| } |
| |
| |
| |
| NodeRefList |
| XPathEvaluator::selectNodeList( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XPath& xpath, |
| const XalanElement* namespaceNode) |
| { |
| const XObjectPtr theResult( |
| evaluate( |
| domSupport, |
| contextNode, |
| xpath, |
| namespaceNode)); |
| |
| return NodeRefList(theResult->nodeset()); |
| } |
| |
| |
| |
| NodeRefList |
| XPathEvaluator::selectNodeList( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XPath& xpath, |
| const PrefixResolver& prefixResolver) |
| { |
| const XObjectPtr theResult( |
| evaluate( |
| domSupport, |
| contextNode, |
| xpath, |
| prefixResolver)); |
| |
| return NodeRefList(theResult->nodeset()); |
| } |
| |
| |
| |
| XObjectPtr |
| XPathEvaluator::evaluate( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XalanDOMChar* xpathString, |
| const XalanElement* namespaceNode) |
| { |
| XPathEnvSupportDefault theEnvSupportDefault; |
| |
| return evaluate( |
| domSupport, |
| contextNode, |
| xpathString, |
| ElementPrefixResolverProxy(namespaceNode, theEnvSupportDefault, domSupport), |
| theEnvSupportDefault); |
| } |
| |
| |
| |
| XObjectPtr |
| XPathEvaluator::evaluate( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XPath& xpath, |
| const XalanElement* namespaceNode) |
| { |
| XPathEnvSupportDefault theEnvSupportDefault; |
| |
| return evaluate( |
| domSupport, |
| contextNode, |
| xpath, |
| ElementPrefixResolverProxy(namespaceNode, theEnvSupportDefault, domSupport), |
| theEnvSupportDefault); |
| } |
| |
| |
| |
| XObjectPtr |
| XPathEvaluator::evaluate( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XalanDOMChar* xpathString, |
| const PrefixResolver& prefixResolver) |
| { |
| XPathEnvSupportDefault theEnvSupportDefault; |
| |
| return evaluate( |
| domSupport, |
| contextNode, |
| xpathString, |
| prefixResolver, |
| theEnvSupportDefault); |
| } |
| |
| |
| |
| XObjectPtr |
| XPathEvaluator::evaluate( |
| DOMSupport& domSupport, |
| XalanNode* contextNode, |
| const XPath& xpath, |
| const PrefixResolver& prefixResolver) |
| { |
| XPathEnvSupportDefault theEnvSupportDefault; |
| |
| return evaluate( |
| domSupport, |
| contextNode, |
| xpath, |
| prefixResolver, |
| theEnvSupportDefault); |
| } |
| |
| |
| |
| XPath* |
| XPathEvaluator::createXPath(const XalanDOMChar* xpathString) |
| { |
| DOMSupportDefault theDOMSupport; |
| XPathEnvSupportDefault theEnvSupportDefault; |
| |
| return createXPath(xpathString, ElementPrefixResolverProxy(0, theEnvSupportDefault, theDOMSupport)); |
| } |
| |
| |
| |
| XPath* |
| XPathEvaluator::createXPath( |
| const XalanDOMChar* xpathString, |
| DOMSupport& domSupport, |
| const XalanElement* namespaceNode) |
| { |
| XPathEnvSupportDefault theEnvSupportDefault; |
| |
| return createXPath(xpathString, ElementPrefixResolverProxy(namespaceNode, theEnvSupportDefault, domSupport)); |
| } |
| |
| |
| |
| XPath* |
| XPathEvaluator::createXPath( |
| const XalanDOMChar* xpathString, |
| const PrefixResolver& prefixResolver) |
| { |
| XPath* const theXPath = m_xpathFactory->create(); |
| assert(theXPath != 0); |
| |
| XPathProcessorImpl theProcessor; |
| |
| theProcessor.initXPath( |
| *theXPath, |
| *m_constructionContext.get(), |
| XalanDOMString(xpathString), |
| 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; |
| |
| XPathProcessorImpl theProcessor; |
| |
| theProcessor.initXPath( |
| theXPath, |
| *m_constructionContext.get(), |
| XalanDOMString(xpathString), |
| 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; |
| } |
| |
| |
| |
| XALAN_CPP_NAMESPACE_END |