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TXFMXPathFilter.hpp

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00001 /*
00002  * Copyright 2002-2005 The Apache Software Foundation.
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 /*
00018  * XSEC
00019  *
00020  * TXFMXPath := Class that performs XPath transforms
00021  *
00022  * $Id: TXFMXPathFilter.hpp 394035 2006-04-14 06:53:07Z blautenb $
00023  *
00024  */
00025 
00026 #if !defined (TXFMXPATHFILTER_HEADER)
00027 #define XFMXPATHFILTER_HEADER
00028 
00029 #include <xsec/transformers/TXFMBase.hpp>
00030 #include <xsec/utils/XSECXPathNodeList.hpp>
00031 #include <xsec/dsig/DSIGTransformXPathFilter.hpp>
00032 #include <xsec/dsig/DSIGConstants.hpp>
00033 
00034 // Xerces
00035 
00036 XSEC_DECLARE_XERCES_CLASS(DOMNode);
00037 XSEC_DECLARE_XERCES_CLASS(DOMNamedNodeMap);
00038 
00039 class TXFMXPathFilterExpr;
00040 class XSECSafeBufferFormatter;
00041 
00042 struct filterSetHolder {
00043 
00044     XSECXPathNodeList   * lst;
00045     xpathFilterType     type;
00046     XERCES_CPP_NAMESPACE_QUALIFIER DOMNode              
00047                         * ancestorInScope;
00048 
00049 };
00050 
00051 
00052 #ifndef XSEC_NO_XPATH
00053 
00060 class DSIG_EXPORT TXFMXPathFilter : public TXFMBase {
00061 
00062 public:
00063 
00064     TXFMXPathFilter(XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument *doc);
00065     ~TXFMXPathFilter();
00066 
00067     // Methods to set the inputs
00068 
00069     void setInput(TXFMBase *newInput);
00070     
00071     // Methods to get tranform output type and input requirement
00072 
00073     virtual TXFMBase::ioType getInputType(void);
00074     virtual TXFMBase::ioType getOutputType(void);
00075     virtual TXFMBase::nodeType getNodeType(void);
00076 
00077     // XPathFilter unique
00078 
00079     void evaluateExprs(DSIGTransformXPathFilter::exprVectorType * exprs);
00080     XSECXPathNodeList * evaluateSingleExpr(DSIGXPathFilterExpr *expr);
00081 
00082     // Methods to get output data
00083 
00084     virtual unsigned int readBytes(XMLByte * const toFill, const unsigned int maxToFill);
00085     virtual XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument *getDocument();
00086     virtual XERCES_CPP_NAMESPACE_QUALIFIER DOMNode *getFragmentNode();
00087     virtual const XMLCh * getFragmentId();
00088     virtual XSECXPathNodeList   & getXPathNodeList();
00089 
00090 private:
00091 
00092     typedef std::vector<filterSetHolder *> lstsVectorType;
00093     TXFMXPathFilter();
00094     void walkDocument(XERCES_CPP_NAMESPACE_QUALIFIER DOMNode * n);
00095     bool checkNodeInScope(XERCES_CPP_NAMESPACE_QUALIFIER DOMNode * n);
00096     bool checkNodeInInput(XERCES_CPP_NAMESPACE_QUALIFIER DOMNode * n, 
00097         XERCES_CPP_NAMESPACE_QUALIFIER DOMNode * attParent);
00098 
00099 
00100     XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument          
00101                         * document;
00102     XSECXPathNodeList   m_xpathFilterMap;
00103     lstsVectorType      m_lsts;
00104 
00105     XSECSafeBufferFormatter * mp_formatter;
00106 
00107     /* Used to hold details during tree-walk */
00108     XERCES_CPP_NAMESPACE_QUALIFIER DOMNode              
00109                         * mp_fragment;
00110     XSECXPathNodeList   * mp_inputList;
00111 
00112 };
00113 
00114 #endif
00115 
00116 #endif /* XPATHFILTER_HEADER */

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