libzypp 17.37.17
zypp::parser::Reader Class Reference

xmlTextReader based interface to iterate xml streams. More...

#include <zypp/parser/xml/Reader.h>

Inheritance diagram for zypp::parser::Reader:
Inheritance graph
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Public Types

using ProcessNode = function<bool (Reader &)>

Public Member Functions

 Reader (const InputStream &stream_r, const Validate &validate_r=Validate::none())
 Ctor.
 ~Reader ()
 Dtor.
XmlString nodeText ()
 If the current node is not empty, advances the reader to the next node, and returns the value.
bool nextNode ()
bool nextNodeAttribute ()
bool nextNodeOrAttribute ()
bool atEnd () const
const Node & operator* () const
const Node * operator-> () const
bool foreachNode (const ProcessNode &fnc_r)
bool foreachNodeAttribute (const ProcessNode &fnc_r)
bool foreachNodeOrAttribute (const ProcessNode &fnc_r)
bool seekToNode (int depth_r, const std::string &name_r)
bool seekToEndNode (int depth_r, const std::string &name_r)

Private Member Functions

void close ()

Private Attributes

InputStream _stream
xmlTextReaderPtr _reader
Node _node

Detailed Description

xmlTextReader based interface to iterate xml streams.

// Consume a node.
bool consumeNode( xml::Reader & reader_r )
{
DBG << *reader_r << endl;
return true;
}
// Consume all nodes (omitting attributes)
void example()
{
try
{
xml::Reader reader( "/Local/repodata/repomd.xml" );
reader.foreachNode( consumeNode );
}
catch ( const Exception & )
{ ; } // parse error
}
zypp::Exception
Base class for Exception.
Definition Exception.h:153
zypp::xml::Reader
xmlTextReader based interface to iterate xml streams.
Definition Reader.h:96
DBG
#define DBG
Definition Logger.h:99
// Consume a node.
bool consumeNodeAndAttribute( xml::Reader & reader_r )
{
consumeNode( reader_r );
return reader_r.foreachNodeAttribute( consumeNode );
}
// Consume all nodes and their attributes.
void example()
{
Pathname repodata( "/Local/repodata/repomd.xml" );
try
{
xml::Reader reader( "/Local/repodata/repomd.xml" );
reader.foreachNode( consumeNodeAndAttribute );
// or:
// reader.foreachNodeOrAttribute( consumeNode )
}
catch ( const Exception & )
{ ; } // parse error
}
zypp::xml::Reader::foreachNodeAttribute
bool foreachNodeAttribute(const ProcessNode &fnc_r)
Definition Reader.h:157

Definition at line 95 of file Reader.h.

Member Typedef Documentation

◆ ProcessNode

using zypp::xml::Reader::ProcessNode = function<bool (Reader &)>

Definition at line 141 of file Reader.h.

Constructor & Destructor Documentation

◆ Reader()

zypp::xml::Reader::Reader ( const InputStream & stream_r,
const Validate & validate_r = Validate::none() )

Ctor.

Setup xmlTextReader and advance to the 1st Node.

Definition at line 88 of file Reader.cc.

◆ ~Reader()

zypp::xml::Reader::~Reader ( )

Dtor.

Definition at line 113 of file Reader.cc.

Member Function Documentation

◆ nodeText()

XmlString zypp::xml::Reader::nodeText ( )

If the current node is not empty, advances the reader to the next node, and returns the value.

Note
if the node has a xml subtree you will probably jump to that node and get a empty text value back. Use it only if you are sure the node has no XML subtree.

Definition at line 122 of file Reader.cc.

◆ nextNode()

bool zypp::xml::Reader::nextNode ( )

Definition at line 142 of file Reader.cc.

◆ nextNodeAttribute()

bool zypp::xml::Reader::nextNodeAttribute ( )

Definition at line 162 of file Reader.cc.

◆ nextNodeOrAttribute()

bool zypp::xml::Reader::nextNodeOrAttribute ( )
inline

Definition at line 124 of file Reader.h.

◆ atEnd()

bool zypp::xml::Reader::atEnd ( ) const
inline

Definition at line 128 of file Reader.h.

◆ operator*()

const Node & zypp::xml::Reader::operator* ( ) const
inline

Definition at line 132 of file Reader.h.

◆ operator->()

const Node * zypp::xml::Reader::operator-> ( ) const
inline

Definition at line 136 of file Reader.h.

◆ foreachNode()

bool zypp::xml::Reader::foreachNode ( const ProcessNode & fnc_r)
inline

Definition at line 144 of file Reader.h.

◆ foreachNodeAttribute()

bool zypp::xml::Reader::foreachNodeAttribute ( const ProcessNode & fnc_r)
inline

Definition at line 157 of file Reader.h.

◆ foreachNodeOrAttribute()

bool zypp::xml::Reader::foreachNodeOrAttribute ( const ProcessNode & fnc_r)
inline

Definition at line 170 of file Reader.h.

◆ seekToNode()

bool zypp::xml::Reader::seekToNode ( int depth_r,
const std::string & name_r )

Definition at line 194 of file Reader.cc.

◆ seekToEndNode()

bool zypp::xml::Reader::seekToEndNode ( int depth_r,
const std::string & name_r )

Definition at line 214 of file Reader.cc.

◆ close()

void zypp::xml::Reader::close ( )
private

Definition at line 181 of file Reader.cc.

Member Data Documentation

◆ _stream

InputStream zypp::xml::Reader::_stream
private

Definition at line 191 of file Reader.h.

◆ _reader

xmlTextReaderPtr zypp::xml::Reader::_reader
private

Definition at line 192 of file Reader.h.

◆ _node

Node zypp::xml::Reader::_node
private

Definition at line 193 of file Reader.h.

The documentation for this class was generated from the following files: