保存 xerces DOMDocument 的示例。保存文档
DOMLSSerializer::write(const DOMNode* nodeToWrite, DOMLSOutput* const destination)
参见代码示例http://xerces.apache.org/xerces-c/domprint-2.html http://xerces.apache.org/xerces-c/domprint-2.html
DOMLSSerializer * theSerializer = impl->createLSSerializer();
DOMPrintFilter *myFilter = new DOMPrintFilter(DOMNodeFilter::SHOW_ELEMENT |
DOMNodeFilter::SHOW_ATTRIBUTE |
DOMNodeFilter::SHOW_DOCUMENT_TYPE);
theSerializer->setFilter(myFilter);
DOMLSOutput *theOutputDesc = ((DOMImplementationLS*)impl)->createLSOutput();
XMLFormatTarget *myFormTarget = new LocalFileFormatTarget(XMLString::transcode("C:\\target.xml"));
theOutputDesc->setByteStream(myFormTarget);
theOutputDesc->setEncoding(XMLString::transcode("ISO-8859-1"));
theSerializer->getDomConfig()->setParameter(XMLUni::fgDOMXMLDeclaration, true);
theSerializer->getDomConfig()->setParameter(XMLUni::fgDOMWRTFormatPrettyPrint, true);
theSerializer->write(doc, theOutputDesc);
myFormTarget->flush();
delete myFormTarget;
theOutputDesc->release();
theSerializer->release();
以及过滤器实现的示例。您可以在 DOMPrint 示例中找到它。
class DOMPrintFilter : public DOMLSSerializerFilter {
public:
DOMPrintFilter(ShowType whatToShow = DOMNodeFilter::SHOW_ALL);
~DOMPrintFilter(){};
virtual FilterAction acceptNode(const DOMNode*) const;
virtual ShowType getWhatToShow() const {return fWhatToShow;};
private:
// unimplemented copy ctor and assignement operator
DOMPrintFilter(const DOMPrintFilter&);
DOMPrintFilter & operator = (const DOMPrintFilter&);
ShowType fWhatToShow;
};
#include "DOMPrintFilter.hpp"
#include <xercesc/util/XMLUniDefs.hpp>
#include <xercesc/util/XMLString.hpp>
static const XMLCh element_person[]=
{
chLatin_p, chLatin_e, chLatin_r, chLatin_s, chLatin_o, chLatin_n, chNull
};
static const XMLCh element_link[]=
{
chLatin_l, chLatin_i, chLatin_n, chLatin_k, chNull
};
DOMPrintFilter::DOMPrintFilter(ShowType whatToShow)
:fWhatToShow(whatToShow)
{}
DOMNodeFilter::FilterAction DOMPrintFilter::
acceptNode(const DOMNode* node) const
{
//
// The DOMLSSerializer shall call getWhatToShow() before calling
// acceptNode(), to show nodes which are supposed to be
// shown to this filter.
//
// REVISIT: In case the DOMLSSerializer does not follow the protocol,
// Shall the filter honour, or NOT, what it claims
// it is interested in ?
//
// The DOMLS specs does not specify that acceptNode() shall do
// this way, or not, so it is up the implementation,
// to skip the code below for the sake of performance ...
//
if ((getWhatToShow() & (1 << (node->getNodeType() - 1))) == 0)
return DOMNodeFilter::FILTER_ACCEPT;
switch (node->getNodeType())
{
case DOMNode::ELEMENT_NODE:
{
// for element whose name is "person", skip it
if (XMLString::compareString(node->getNodeName(), element_person)==0)
return DOMNodeFilter::FILTER_SKIP;
// for element whose name is "line", reject it
if (XMLString::compareString(node->getNodeName(), element_link)==0)
return DOMNodeFilter::FILTER_REJECT;
// for rest, accept it
return DOMNodeFilter::FILTER_ACCEPT;
break;
}
case DOMNode::COMMENT_NODE:
{
// the WhatToShow will make this no effect
return DOMNodeFilter::FILTER_REJECT;
break;
}
case DOMNode::TEXT_NODE:
{
// the WhatToShow will make this no effect
return DOMNodeFilter::FILTER_REJECT;
break;
}
case DOMNode::DOCUMENT_TYPE_NODE:
{
// even we say we are going to process document type,
// we are not able be to see this node since
// DOMLSSerializerImpl (a XercesC's default implementation
// of DOMLSSerializer) will not pass DocumentType node to
// this filter.
//
return DOMNodeFilter::FILTER_REJECT; // no effect
break;
}
case DOMNode::DOCUMENT_NODE:
{
// same as DOCUMENT_NODE
return DOMNodeFilter::FILTER_REJECT; // no effect
break;
}
default :
{
return DOMNodeFilter::FILTER_ACCEPT;
break;
}
}
return DOMNodeFilter::FILTER_ACCEPT;
}