TXFMXPath.hpp

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/*
 * Copyright 2002-2005 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.
 */

/*
 * XSEC
 *
 * TXFMXPath := Class that performs XPath transforms
 *
 * $Id: TXFMXPath.hpp,v 1.10 2005/02/03 13:50:12 milan Exp $
 *
 */

#include <xsec/transformers/TXFMBase.hpp>
#include <xsec/utils/XSECSafeBuffer.hpp>
#include <xsec/canon/XSECC14n20010315.hpp>
#include <xsec/dsig/DSIGXPathHere.hpp>
#include <xsec/utils/XSECSafeBufferFormatter.hpp>

// Xerces

XSEC_DECLARE_XERCES_CLASS(DOMNode);
XSEC_DECLARE_XERCES_CLASS(DOMNamedNodeMap);

// Xalan

#ifndef XSEC_NO_XALAN

#include <xalanc/XalanDOM/XalanDocument.hpp>
#include <xalanc/XercesParserLiaison/XercesDocumentWrapper.hpp>
#include <xalanc/XercesParserLiaison/XercesDOMSupport.hpp>
#include <xalanc/XercesParserLiaison/XercesParserLiaison.hpp>
#include <xalanc/XPath/XPathEvaluator.hpp>
#include <xalanc/XPath/XPathProcessorImpl.hpp>
#include <xalanc/XPath/XPathFactoryDefault.hpp>
#include <xalanc/XPath/NodeRefList.hpp>
#include <xalanc/XPath/XPathEnvSupportDefault.hpp>
#include <xalanc/XPath/XPathConstructionContextDefault.hpp>
#include <xalanc/XPath/ElementPrefixResolverProxy.hpp>

#endif

#ifndef XSEC_NO_XPATH

class DSIG_EXPORT TXFMXPath : public TXFMBase {

private:

    safeBuffer expr;                            // The expression being worked with

    XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument          * document;
    XERCES_CPP_NAMESPACE_QUALIFIER DOMNamedNodeMap      * XPathAtts;    // Attributes that came through from the doc

    static  bool        XPathInitDone;

    DSIGXPathHere       * here;         // The function to implement here()
    XSECSafeBufferFormatter * formatter;

public:

    TXFMXPath(XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument *doc);
    ~TXFMXPath();

    // Methods to set the inputs

    void setInput(TXFMBase *newInput);
    
    // Methods to get tranform output type and input requirement

    virtual TXFMBase::ioType getInputType(void);
    virtual TXFMBase::ioType getOutputType(void);
    virtual TXFMBase::nodeType getNodeType(void);

    // XPath unique

    void setNameSpace(XERCES_CPP_NAMESPACE_QUALIFIER DOMNamedNodeMap *xpAtts);
    void evaluateExpr(XERCES_CPP_NAMESPACE_QUALIFIER DOMNode *h, safeBuffer expr);
    void evaluateEnvelope(XERCES_CPP_NAMESPACE_QUALIFIER DOMNode *t);

    // Methods to get output data

    virtual unsigned int readBytes(XMLByte * const toFill, const unsigned int maxToFill);
    virtual XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument *getDocument();
    virtual XERCES_CPP_NAMESPACE_QUALIFIER DOMNode *getFragmentNode();
    virtual const XMLCh * getFragmentId();
    virtual XSECXPathNodeList   & getXPathNodeList();
private:
    TXFMXPath();
};

#endif

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