WIP: hdf5: Dataset

src/opt/hdf5/include/h5_dataset.h

@@ -0,0 +1,51 @@
+
+#ifndef __cxz_h5_dataset_h__
+#define __cxz_h5_dataset_h__
+
+#include "h5_types.h"
+#include "h5_content_base.h"
+
+namespace CNORXZ
+{
+    namespace hdf5
+    {
+	class Dataset : public ContentBase
+	{
+	public:
+	    DEFAULT_MEMBERS(Dataset);
+	    Dataset(const String& name, const ContentBase* _parent);
+	    ~Dataset();
+
+	    virtual ContentType type() const override final;
+	    virtual bool ro() const override final;
+	    virtual Dataset& open() override final;
+	    virtual Dataset& close() override final;
+	    virtual String path() const override final;
+	    virtual String filename() const override final;
+
+	    bool exists() const;
+
+	    Dataset& init(const RangePtr& dataRange, hid_t type);
+	    
+	    const RangePtr& dataRange() const;
+	    
+	protected:
+	    RangePtr mDataRange;
+	    hid_t mType;
+	    hid_t mFilespace;
+	    
+	};
+
+	template <typename T>
+	class SDataset : public Dataset
+	{
+	public:
+	    DEFAULT_MEMBERS(SDataset);
+	    SDataset(const String& name, const ContentBase* _parent);
+
+	    MArray<T> read() const;
+	};
+    }
+}
+
+#endif

src/opt/hdf5/lib/CMakeLists.txt

@@ -4,6 +4,7 @@ set(libcnorxzhdf5_a_SOURCES
   ${CMAKE_CURRENT_SOURCE_DIR}/h5_file.cc
   ${CMAKE_CURRENT_SOURCE_DIR}/h5_group.cc
   ${CMAKE_CURRENT_SOURCE_DIR}/h5_table.cc
+  ${CMAKE_CURRENT_SOURCE_DIR}/h5_dataset.cc
   )
 
 add_library(cnorxzhdf5_obj OBJECT

src/opt/hdf5/lib/h5_dataset.cc

@@ -0,0 +1,103 @@
+
+#include "h5_dataset.h"
+
+namespace CNORXZ
+{
+    namespace hdf5
+    {
+	Dataset::Dataset(const String& name, const ContentBase* _parent) :
+	    ContentBase(name, _parent)
+	{
+	    if(exists()){
+		open();
+	    }
+	}
+	
+	Dataset::~Dataset()
+	{
+	    this->close();
+	}
+
+	ContentType Dataset::type() const
+	{
+	    return ContentType::DSET;
+	}
+	
+	bool Dataset::ro() const
+	{
+	    return mParent->ro();
+	}
+	
+	Dataset& Dataset::open()
+	{
+	    if(mId == 0 and exists()){
+		mId = H5Dopen(mParent->id(), mName.c_str(), H5P_DEFAULT);
+		mType = H5Dget_type(mId);
+
+		mFilespace = H5Dget_space(mId);
+		SizeT ndims = H5Sget_simple_extent_ndims(mFilespace);
+		Vector<hsize_t> dims(ndims);
+		H5Sget_simple_extent_dims(mFilespace, dims.data(), nullptr);
+
+		Vector<RangePtr> rs(ndims);
+		for(SizeT i = 0; i != ndims; ++i){
+		    rs[i] = CRangeFactory(dims[i]).create();
+		}
+		mDataRange = yrange(rs);
+
+		// use when reading!!!:
+		//hid_t mem_space_id = H5Screate_simple(static_cast<hsize_t>(ndims), dims.data(), nullptr);
+		//hid_t xfer_plist_id = H5Pcreate(H5P_DATASET_XFER);
+	    }
+	    return *this;
+	}
+	
+	Dataset& Dataset::close()
+	{
+	    if(mId != 0){
+		//!!!
+		H5Sclose(mFilespace);
+		H5Tclose(mType);
+		H5Dclose(mId);
+		mId = 0;
+	    }
+	    return *this;
+	}
+	
+	String Dataset::path() const
+	{
+	    return mParent->path() + "/" + mName;
+	}
+	
+	String Dataset::filename() const
+	{
+	    return mParent->filename();
+	}
+
+	bool Dataset::exists() const
+	{
+	    return H5Lexists(mParent->id(), mName.c_str(), H5P_DEFAULT);
+	}
+
+	Dataset& Dataset::init(const RangePtr& dataRange, hid_t type)
+	{
+	    // check if type is valid type!!!
+	    const hid_t dcpl_id = H5Pcreate(H5P_DATASET_CREATE);
+	    // TODO: all sub-ranges explicity!!!:
+	    const SizeT ndim = dataRange->dim();
+	    Vector<hsize_t> exts(ndim);
+	    mFilespace = H5Screate_simple(ndim, exts.data(), NULL);
+	    mType = type;
+	    mId = H5Dcreate(mParent->id(), mName.c_str(), mType, mFilespace,
+			    H5P_DEFAULT, dcpl_id, H5P_DEFAULT);
+	    H5Pclose(dcpl_id);
+	    return *this;
+	}
+
+	const RangePtr& Dataset::dataRange() const
+	{
+	    return mDataRange;
+	}
+	
+    }
+}