elimate duplicated code in pkgIndexFile subclasses

Trade deduplication of code for a bunch of new virtuals, so it is
actually visible how the different indexes behave cleaning up the
interface at large in the process.

Git-Dch: Ignore

3 files changed, 54 insertions, 45 deletions

diff --git a/apt-pkg/edsp/edspindexfile.cc b/apt-pkg/edsp/edspindexfile.cc
index 649d94b5d..a8a528131 100644
--- a/apt-pkg/edsp/edspindexfile.cc
+++ b/apt-pkg/edsp/edspindexfile.cc
@@ -26,59 +26,66 @@
 #include <string>
 									/*}}}*/
 
-// edspIndex::edspIndex - Constructor					/*{{{*/
-// ---------------------------------------------------------------------
-/* */
-edspIndex::edspIndex(std::string File) : debStatusIndex(File), d(NULL)
+// EDSP Index								/*{{{*/
+edspIndex::edspIndex(std::string const &File) : pkgDebianIndexRealFile(File, true), d(NULL)
 {
 }
-									/*}}}*/
-// StatusIndex::Merge - Load the index file into a cache		/*{{{*/
-bool edspIndex::Merge(pkgCacheGenerator &Gen,OpProgress *Prog) const
+std::string edspIndex::GetComponent() const
 {
-   FileFd Pkg;
-   if (File != "stdin")
-      Pkg.Open(File, FileFd::ReadOnly);
-   else
-      Pkg.OpenDescriptor(STDIN_FILENO, FileFd::ReadOnly);
-   if (_error->PendingError() == true)
-      return false;
-   edspListParser Parser(&Pkg);
-   if (_error->PendingError() == true)
-      return false;
-
-   if (Prog != NULL)
-      Prog->SubProgress(0,File);
-   if (Gen.SelectFile(File, *this, "", "edsp") == false)
-      return _error->Error("Problem with SelectFile %s",File.c_str());
-
-   // Store the IMS information
-   pkgCache::PkgFileIterator CFile = Gen.GetCurFile();
-   pkgCacheGenerator::Dynamic<pkgCache::PkgFileIterator> DynFile(CFile);
-   CFile->Size = Pkg.FileSize();
-   CFile->mtime = Pkg.ModificationTime();
-
-   if (Gen.MergeList(Parser) == false)
-      return _error->Error("Problem with MergeList %s",File.c_str());
+   return "edsp";
+}
+std::string edspIndex::GetArchitecture() const
+{
+   return std::string();
+}
+bool edspIndex::HasPackages() const
+{
+   return true;
+}
+bool edspIndex::Exists() const
+{
+   return true;
+}
+uint8_t edspIndex::GetIndexFlags() const
+{
+   return 0;
+}
+bool edspIndex::OpenListFile(FileFd &Pkg, std::string const &FileName)
+{
+   if (FileName.empty() == false && FileName != "stdin")
+      return pkgDebianIndexRealFile::OpenListFile(Pkg, FileName);
+   if (Pkg.OpenDescriptor(STDIN_FILENO, FileFd::ReadOnly) == false)
+      return _error->Error("Problem opening %s",FileName.c_str());
    return true;
 }
+pkgCacheListParser * edspIndex::CreateListParser(FileFd &Pkg)
+{
+   if (Pkg.IsOpen() == false)
+      return NULL;
+   _error->PushToStack();
+   pkgCacheListParser * const Parser = new edspListParser(&Pkg);
+   bool const newError = _error->PendingError();
+   _error->MergeWithStack();
+   return newError ? NULL : Parser;
+}
 									/*}}}*/
+
 // Index File types for APT						/*{{{*/
 class APT_HIDDEN edspIFType: public pkgIndexFile::Type
 {
    public:
-   virtual pkgRecords::Parser *CreatePkgParser(pkgCache::PkgFileIterator) const APT_OVERRIDE
+   virtual pkgRecords::Parser *CreatePkgParser(pkgCache::PkgFileIterator const &) const APT_OVERRIDE
    {
       // we don't have a record parser for this type as the file is not presistent
       return NULL;
    };
    edspIFType() {Label = "EDSP scenario file";};
 };
-APT_HIDDEN edspIFType _apt_Universe;
+APT_HIDDEN edspIFType _apt_Edsp;
 
 const pkgIndexFile::Type *edspIndex::GetType() const
 {
-   return &_apt_Universe;
+   return &_apt_Edsp;
 }
 									/*}}}*/
 
diff --git a/apt-pkg/edsp/edspindexfile.h b/apt-pkg/edsp/edspindexfile.h
index b2a510f14..edf799023 100644
--- a/apt-pkg/edsp/edspindexfile.h
+++ b/apt-pkg/edsp/edspindexfile.h
@@ -18,18 +18,24 @@
 class OpProgress;
 class pkgCacheGenerator;
 
-class APT_HIDDEN edspIndex : public debStatusIndex
+class APT_HIDDEN edspIndex : public pkgDebianIndexRealFile
 {
    /** \brief dpointer placeholder (for later in case we need it) */
    void * const d;
 
-   public:
+protected:
+   APT_HIDDEN virtual pkgCacheListParser * CreateListParser(FileFd &Pkg) APT_OVERRIDE;
+   virtual bool OpenListFile(FileFd &Pkg, std::string const &File) APT_OVERRIDE;
+   virtual uint8_t GetIndexFlags() const APT_OVERRIDE;
+   virtual std::string GetComponent() const APT_OVERRIDE;
+   virtual std::string GetArchitecture() const APT_OVERRIDE;
+public:
 
    virtual const Type *GetType() const APT_CONST;
+   virtual bool Exists() const APT_OVERRIDE;
+   virtual bool HasPackages() const APT_OVERRIDE;
 
-   virtual bool Merge(pkgCacheGenerator &Gen,OpProgress *Prog) const APT_OVERRIDE;
-
-   edspIndex(std::string File);
+   edspIndex(std::string const &File);
    virtual ~edspIndex();
 };
 
diff --git a/apt-pkg/edsp/edspsystem.cc b/apt-pkg/edsp/edspsystem.cc
index f65fcc0d2..c4583252f 100644
--- a/apt-pkg/edsp/edspsystem.cc
+++ b/apt-pkg/edsp/edspsystem.cc
@@ -81,13 +81,9 @@ bool edspSystem::ArchiveSupported(const char * /*Type*/)
    return false;
 }
 									/*}}}*/
-// System::Score - Determine if we should use the edsp system		/*{{{*/
-signed edspSystem::Score(Configuration const &Cnf)
+// System::Score - Never use the EDSP system automatically		/*{{{*/
+signed edspSystem::Score(Configuration const &)
 {
-   if (Cnf.Find("edsp::scenario", "") == "stdin")
-      return 1000;
-   if (RealFileExists(Cnf.FindFile("edsp::scenario","")) == true)
-      return 1000;
    return -1000;
 }
 									/*}}}*/