/usr/include/x86_64-linux-gnu/zypp/UserData.h is in libzypp-dev 15.3.0-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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\---------------------------------------------------------------------*/
/** \file zypp/UserData.h
*/
#ifndef ZYPP_USERDATA_H
#define ZYPP_USERDATA_H
#include <iosfwd>
#include <string>
#include <map>
#include <boost/any.hpp>
#include "zypp/base/PtrTypes.h"
#include "zypp/ContentType.h"
///////////////////////////////////////////////////////////////////
namespace zypp
{
///////////////////////////////////////////////////////////////////
namespace callback
{
///////////////////////////////////////////////////////////////////
/// \class UserData
/// \brief Typesafe passing of user data via callbacks
///
/// Basically a <tt>std::map<std::string,boost::any></tt> plus
/// associated \ref ContentType.
///
/// Constness protects non-empty values from being modified.
/// It is possible to overwrite empty values or to add new ones.
///////////////////////////////////////////////////////////////////
class UserData
{
typedef std::map<std::string,boost::any> DataType;
typedef DataType::size_type size_type;
typedef DataType::key_type key_type;
typedef DataType::value_type value_type;
typedef DataType::const_iterator const_iterator;
public:
/** Default ctor. */
UserData()
{}
/** Ctor taking ContentType. */
explicit UserData( ContentType type_r )
: _type( std::move(type_r) )
{}
/** Ctor taking ContentType. */
explicit UserData( std::string type_r )
: UserData( ContentType( std::move(type_r) ) )
{}
/** Ctor taking ContentType. */
UserData( std::string type_r, std::string subtype_r )
: UserData( ContentType( std::move(type_r), std::move(subtype_r) ) )
{}
public:
/** Get type. */
const ContentType & type() const
{ return _type; }
/** Set type. */
void type( ContentType type_r )
{ _type = std::move(type_r); }
public:
/** Validate object in a boolean context: has data */
explicit operator bool() const
{ return !empty(); }
/** Whether \ref data is empty. */
bool empty() const
{ return !_dataP || _dataP->empty(); }
/** Size of \ref data. */
size_type size() const
{ return _dataP ? _dataP->size() : 0; }
/** The \ref data. */
const DataType & data() const
{ return dataRef(); }
/** Whether \a key_r is in \ref data. */
bool haskey( const std::string & key_r ) const
{ return _dataP && _dataP->find( key_r ) != _dataP->end(); }
/** Whether \a key_r is in \ref data and value is not empty. */
bool hasvalue( const std::string & key_r ) const
{
bool ret = false;
if ( _dataP )
{
const_iterator it = _dataP->find( key_r );
if ( it != _dataP->end() && ! it->second.empty() )
{
ret = true;
}
}
return ret;
}
/** Set the value for key (nonconst version always returns true).
* Const version is allowed to set empty values or to add new ones only.
*/
bool set( const std::string & key_r, boost::any val_r )
{ dataRef()[key_r] = std::move(val_r); return true; }
/** \overload const version */
bool set( const std::string & key_r, boost::any val_r ) const
{
bool ret = false;
boost::any & val( dataRef()[key_r] );
if ( val.empty() )
{
val = std::move(val_r);
ret = true;
}
return ret;
}
/** Set an empty value for \a key_r (if possible). */
bool reset( const std::string & key_r )
{ return set( key_r, boost::any() ); }
/** \overload const version */
bool reset( const std::string & key_r ) const
{ return set( key_r, boost::any() ); }
/** Remove key from data.*/
void erase( const std::string & key_r )
{ if ( _dataP ) _dataP->erase( key_r ); }
/** Return the keys boost::any value or an empty value if key does not exist. */
const boost::any & getvalue( const std::string & key_r ) const
{
if ( _dataP )
{
const_iterator it = _dataP->find( key_r );
if ( it != _dataP->end() )
{
return it->second;
}
}
static const boost::any none;
return none;
}
/** Pass back a <tt>const Tp &</tt> reference to \a key_r value.
* \throws boost::bad_any_cast if key is not set or value is not of appropriate type
* \code
* UserData data;
* std::string value( "defaultvalue" );
* try
* {
* value = data.get<std::string>( "mykey" );
* }
* catch ( const boost::bad_any_cast & )
* {
* // no "mykey" or not a std::sting
* }
* \endcode
*/
template <class Tp>
const Tp & get( const std::string & key_r ) const
{ return boost::any_cast<const Tp &>( getvalue( key_r ) ); }
/** Pass back a \a Tp copy of \a key_r value.
* \throws boost::bad_any_cast if key is not set or value is not of appropriate type
* \code
* UserData data;
* std::string value = data.get<std::string>( "mykey", "defaultvalue" );
* \endcode
*/
template <class Tp>
Tp get( const std::string & key_r, const Tp & default_r ) const
{ Tp ret( default_r ); get( key_r, ret ); return ret; }
/** If the value for \a key_r is of the same type as \a ret_r, pass it back in \a ret_r and return \c true;.
* \code
* UserData data;
* std::string value( "defaultvalue" );
* if ( ! data.get<std::string>( "mykey", value )
* {
* // no "mykey" or not a std::sting
* }
* \endcode
*/
template <class Tp>
bool get( const std::string & key_r, Tp & ret_r ) const
{
bool ret = false;
if ( _dataP )
{
const_iterator it = _dataP->find( key_r );
if ( it != _dataP->end() )
{
auto ptr = boost::any_cast<const Tp>(&it->second);
if ( ptr )
{
ret_r = *ptr;
ret = true;
}
}
}
return ret;
}
private:
DataType & dataRef() const
{ if ( ! _dataP ) _dataP.reset( new DataType ); return *_dataP; }
private:
ContentType _type;
mutable shared_ptr<DataType> _dataP;
};
/** \relates UserData Stream output */
inline std::ostream & operator<<( std::ostream & str, const UserData & obj )
{ return str << "UserData(" << obj.type() << ":" << obj.size() << ")";}
} // namespace callback
///////////////////////////////////////////////////////////////////
} // namespace zypp
///////////////////////////////////////////////////////////////////
#endif // ZYPP_USERDATA_H
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