#ifndef ZYPP_SAT_LOOKUPATTR_H
#define ZYPP_SAT_LOOKUPATTR_H
-extern "C"
-{
-struct _Dataiterator;
-}
#include <iosfwd>
#include "zypp/base/PtrTypes.h"
{ /////////////////////////////////////////////////////////////////
class CheckSum;
+ class Match;
+ class MatchException;
+ class StrMatcher;
///////////////////////////////////////////////////////////////////
namespace sat
*
* Use \ref SolvAttr::allAttr to search all attributes.
*
+ * To search for attributes located in a sub-structure (flexarray)
+ * you also have to pass the sub-structures attribute as parent.
+ * Passing \ref SolvAttr::allAttr a parent will lookup the attribute
+ * in \c any sub-structure. Few attributes are known to have a parent
+ * (\see \ref SolvAttr::parent). Setting those attributes will automatically
+ * initialize their parent value.
+ *
+ * \code
+ * // Lookup all 'name' attributes:
+ * sat::LookupAttr q( sat::SolvAttr::name );
+ * // Lookup all 'name' attributes within a sub-structure 'data':
+ * sat::LookupAttr q( sat::SolvAttr::name, sat::SolvAttr::data );
+ * // Lookup all 'name' attributes within any sub-structure:
+ * sat::LookupAttr q( sat::SolvAttr::name, sat::SolvAttr::allAttr );
+ * \endcode
+ *
* \code
* // look for all attributes of one solvable
* void ditest( sat::Solvable slv_r )
class LookupAttr
{
public:
+ typedef MatchException Exception;
+
+ public:
typedef unsigned size_type;
/** Specify the where to look for the attribule. */
/** Lookup \ref SolvAttr in \ref Pool (all repositories). */
explicit LookupAttr( SolvAttr attr_r, Location = SOLV_ATTR );
+ /** \overload SolvAttr within sub-structure \a parent_r. */
+ LookupAttr( SolvAttr attr_r, SolvAttr parent_r, Location = SOLV_ATTR );
/** Lookup \ref SolvAttr in one\ref Repository. */
- explicit LookupAttr( SolvAttr attr_r, Repository repo_r, Location = SOLV_ATTR );
+ LookupAttr( SolvAttr attr_r, Repository repo_r, Location = SOLV_ATTR );
+ /** \overload SolvAttr within sub-structure \a parent_r. */
+ LookupAttr( SolvAttr attr_r, SolvAttr parent_r, Repository repo_r, Location = SOLV_ATTR );
/** Lookup \ref SolvAttr in one \ref Solvable. */
LookupAttr( SolvAttr attr_r, Solvable solv_r );
+ /** \overload SolvAttr within sub-structure \a parent_r. */
+ LookupAttr( SolvAttr attr_r, SolvAttr parent_r, Solvable solv_r );
public:
/** \name Search result. */
*/
size_type size() const;
- /** TransformIterator returning an \ref iterator vaue of type \c _ResultT. */
- template<class _ResultT, class _AttrT = _ResultT> class transformIterator;
+ /** TransformIterator returning an \ref iterator vaue of type \c TResult. */
+ template<class TResult, class TAttr = TResult>
+ class TransformIterator;
//@}
public:
void setAttr( SolvAttr attr_r );
//@}
+ /** \name Restrict attributes to match a pattern. */
+ //@{
+ /** The pattern to match.
+ * You can also evaluate \ref StrMatcher in a boolean context,
+ * in order to test whether an \ref StrMatcher is set:
+ * \code
+ * LookupAttr q;
+ * if ( q.strMatcher() )
+ * ...; // an StrMatcher is set
+ * \endcode
+ */
+ const StrMatcher & strMatcher() const;
+
+ /** Set the pattern to match.
+ * \throws MatchException Any of the exceptions thrown by \ref StrMatcher::compile.
+ */
+ void setStrMatcher( const StrMatcher & matcher_r );
+
+ /** Reset the pattern to match. */
+ void resetStrMatcher();
+ //@}
+
public:
/** \name Where to search. */
//@{
- /** Wheter to search in \ref Pool. */
+ /** Whether to search in \ref Pool. */
bool pool() const;
/** Set search in \ref Pool (all repositories). */
void setPool( Location = SOLV_ATTR );
- /** Wheter to search in one \ref Repository. */
+ /** Whether to search in one \ref Repository. */
Repository repo() const;
/** Set search in one \ref Repository. */
void setRepo( Repository repo_r, Location = SOLV_ATTR );
- /** Wheter to search in one \ref Solvable. */
+ /** Whether to search in one \ref Solvable. */
Solvable solvable() const;
/** Set search in one \ref Solvable. */
void setSolvable( Solvable solv_r );
+
+ /** Whether to search within a sub-structure (\ref SolvAttr::noAttr if not) */
+ SolvAttr parent() const;
+
+ /** Set search within a sub-structure (\ref SolvAttr::noAttr for none) */
+ void setParent( SolvAttr attr_r );
//@}
private:
//
// CLASS NAME : LookupRepoAttr
//
- /** Lightweight repositor attribute value lookup.
+ /** Lightweight repository attribute value lookup.
*
* This is just a convenience class that overloads all
* \ref LookupAttr methods which take a \ref LookupAttr::Location
};
///////////////////////////////////////////////////////////////////
+ namespace detail
+ {
+ /** Wrapper around sat \c detail::CDataiterator.
+ *
+ * Manages copy and assign, and release of allocated
+ * resources like datamatcher inside the dataiterator.
+ * Also maintains a copy of the matchstring in order to
+ * keep the char* passed to the dataiterator valid.
+ */
+ class DIWrap
+ {
+ public:
+ /** \c NULL \c detail::CDataiterator */
+ DIWrap()
+ : _dip( 0 )
+ {}
+ /** Initializes */
+ DIWrap( RepoIdType repoId_r, SolvableIdType solvId_r, IdType attrId_r,
+ const std::string & mstring_r = std::string(), int flags_r = 0 );
+ /** \overload to catch \c NULL \a mstring_r. */
+ DIWrap( RepoIdType repoId_r, SolvableIdType solvId_r, IdType attrId_r,
+ const char * mstring_r, int flags_r = 0 );
+ DIWrap( const DIWrap & rhs );
+ ~DIWrap();
+ public:
+ void swap( DIWrap & rhs )
+ {
+ if ( &rhs != this ) // prevent self assign!
+ {
+ std::swap( _dip, rhs._dip );
+ std::swap( _mstring, rhs._mstring );
+ }
+ }
+ DIWrap & operator=( const DIWrap & rhs )
+ {
+ if ( &rhs != this ) // prevent self assign!
+ DIWrap( rhs ).swap( *this );
+ return *this;
+ }
+ void reset()
+ { DIWrap().swap( *this ); }
+ public:
+ /** Evaluate in a boolean context <tt>( _dip != NULL )</tt>. */
+ explicit operator bool() const
+ { return _dip; }
+
+ public:
+ detail::CDataiterator * operator->() const { return _dip; }
+ detail::CDataiterator * get() const { return _dip; }
+ const std::string & getstr() const { return _mstring; }
+
+ private:
+ detail::CDataiterator * _dip;
+ std::string _mstring;
+ };
+ /** \relates DIWrap Stream output. */
+ std::ostream & operator<<( std::ostream & str, const DIWrap & obj );
+ }
+
///////////////////////////////////////////////////////////////////
//
// CLASS NAME : LookupAttr::iterator
*/
class LookupAttr::iterator : public boost::iterator_adaptor<
iterator // Derived
- , ::_Dataiterator * // Base
+ , detail::CDataiterator * // Base
, detail::IdType // Value
, boost::forward_traversal_tag // CategoryOrTraversal
, detail::IdType // Reference
/** Immediately advance to the next \ref Repository. */
void skipRepo()
{ nextSkipRepo(); increment(); }
+
+ /** Stop after all matches in the current \ref Solvable are processed. */
+ void stayInThisSolvable();
+
+ /** Stop after all matches in the current \ref Repository are processed. */
+ void stayInThisRepo();
//@}
/** \name Current position info. */
/** The current \ref SolvAttr. */
SolvAttr inSolvAttr() const;
+
+ /** Whether this points to the end of a query (Iterator is invalid). */
+ bool atEnd() const
+ { return !_dip; }
//@}
/** \name Test attribute value type. */
/** Whether this is a string attribute. */
bool solvAttrString() const;
- /** *Whether this string attribute is available as \ref IdString. */
+ /** Whether this string attribute is available as \ref IdString. */
bool solvAttrIdString() const;
/** Whether this is a CheckSum attribute.*/
*
* These are usable iff \ref solvAttrSubEntry is \c true.
*
+ * \note Unfortunately the underlying libsolv dataiterator as returned
+ * by \ref subBegin and \ref subFind loses some context when being created.
+ * Thus it's not possible to invoke \ref subBegin and \ref subFind on an
+ * iterator that was previously returned by one of those methods. The result
+ * will be an \c end iterator. For the same reason it is not possible for an
+ * iterator to leave the sub-structure again.
+ *
* \code
* // Lookup all "update:reference" entries for a specific solvable
* sat::LookupAttr q( sat::SolvAttr::updateReference, p->satSolvable() );
* \endcode
*/
//@{
- /** Wheter the sub-structure is empty. */
+ /** Whether the sub-structure is empty. */
bool subEmpty() const;
/** Ammount of attributes in the sub-structure.
unsigned asUnsigned() const;
/** \overload */
bool asBool() const;
+ /** \overload */
+ unsigned long long asUnsignedLL() const;
/** Conversion to string types. */
const char * c_str() const;
* via \ref c_str and \ref asString.
*/
IdString idStr() const;
+ /** \overload Directly returning the \c Id */
+ detail::IdType id() const
+ { return idStr().id(); }
/** As \ref CheckSum. */
CheckSum asCheckSum() const;
/** Templated return type.
- * Specialized for supported types.
+ * Per default assumes an Id based type, so try to construct
+ * it from the Id.
+ *
+ * Should be specialized for supported types above.
*/
- template<class _Tp> _Tp asType() const;
+ template<class Tp> Tp asType() const { return Tp(id()); }
//@}
///////////////////////////////////////////////////////////////////
public:
/**
- * C-tor taking over ownership of the passed scoped _Dataiterator*
+ * C-tor taking over ownership of the passed \c detail::CDataiterator
* and doing it's first iteration (::dataiterator_step)
*/
- iterator( scoped_ptr< ::_Dataiterator> & dip_r );
+ iterator( detail::DIWrap & dip_r );
private:
friend class boost::iterator_core_access;
- ::_Dataiterator * cloneFrom( const ::_Dataiterator * rhs );
-
template <class OtherDerived, class OtherIterator, class V, class C, class R, class D>
bool equal( const boost::iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> & rhs ) const
{
&& ( ! base() || dip_equal( *base(), *rhs.base() ) );
}
- bool dip_equal( const ::_Dataiterator & lhs, const ::_Dataiterator & rhs ) const;
+ bool dip_equal( const detail::CDataiterator & lhs, const detail::CDataiterator & rhs ) const;
detail::IdType dereference() const;
public:
/** Expert backdoor. */
- ::_Dataiterator * get() const
+ detail::CDataiterator * get() const
{ return _dip.get(); }
private:
- scoped_ptr< ::_Dataiterator> _dip;
+ detail::DIWrap _dip;
};
///////////////////////////////////////////////////////////////////
//@{
template<> inline int LookupAttr::iterator::asType<int>() const { return asInt(); }
template<> inline unsigned LookupAttr::iterator::asType<unsigned>() const { return asUnsigned(); }
+ template<> inline unsigned long long LookupAttr::iterator::asType<unsigned long long>() const { return asUnsignedLL(); }
template<> inline bool LookupAttr::iterator::asType<bool>() const { return asBool(); }
template<> inline const char * LookupAttr::iterator::asType<const char *>() const { return c_str(); }
template<> inline std::string LookupAttr::iterator::asType<std::string>() const { return asString(); }
template<> inline IdString LookupAttr::iterator::asType<IdString>() const { return idStr(); }
+ template<> CheckSum LookupAttr::iterator::asType<CheckSum>() const;
- template<class _ResultT, class _AttrT>
+ template<class TResult, class TAttr>
class ArrayAttr;
//@}
///////////////////////////////////////////////////////////////////
/** \relates LookupAttr::iterator Stream output of the underlying iterator for debug. */
-std::ostream & operator<<( std::ostream & str, const ::_Dataiterator * obj );
+std::ostream & operator<<( std::ostream & str, const zypp::sat::detail::CDataiterator * obj );
/** \relates LookupAttr::iterator Stream output of the underlying iterator for debug. */
-inline std::ostream & operator<<( std::ostream & str, const ::_Dataiterator & obj )
+inline std::ostream & operator<<( std::ostream & str, const zypp::sat::detail::CDataiterator & obj )
{ return str << &obj; }
#endif // ZYPP_SAT_LOOKUPATTR_H
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