path: root/c++/src/H5Location.h

// C++ informative line for the emacs editor: -*- C++ -*-
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
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 * terms governing use, modification, and redistribution, is contained in    *
 * the files COPYING and Copyright.html.  COPYING can be found at the root   *
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 * root level of an installed copy of the electronic HDF5 document set and   *
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 * access to either file, you may request a copy from help@hdfgroup.org.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#ifndef __H5Location_H
#define __H5Location_H

#include "H5Classes.h"		// constains forward class declarations

#ifndef H5_NO_NAMESPACE
namespace H5 {
#endif

//class H5_DLLCPP H5Location;  // forward declaration for UserData4Aiterate

// Define the operator function pointer for H5Aiterate().
//typedef void (*attr_operator_t)( H5Location& loc/*in*/,
                                 //const H5std_string attr_name/*in*/,
                                 //void *operator_data/*in,out*/);

//! User data for attribute iteration
 /* class UserData4Aiterate {
   public:
	attr_operator_t op;
	void* opData;
	H5Location* location;
};
 */ 

// Class forwarding
class H5_DLLCPP ArrayType;
class H5_DLLCPP VarLenType;

/*! \class H5Location
    \brief H5Location is an abstract base class, added in version 1.8.12.

    It provides a collection of wrappers for the C functions that take a
    location identifier to specify the HDF5 object.  The location identifier
    can be either file, group, dataset, or named datatype.
*/
// Most of these methods were in H5Object but are now moved here because
// a location can be a file, group, dataset, or named datatype. -BMR, 2013-10-1
class H5_DLLCPP H5Location : public IdComponent {
   public:
	// Flushes all buffers associated with this location to disk.
	void flush( H5F_scope_t scope ) const;

	// Gets the name of the file, specified by this location.
	H5std_string getFileName() const;

#ifndef H5_NO_DEPRECATED_SYMBOLS
	// Retrieves the type of object that an object reference points to.
	H5G_obj_t getObjType(void *ref, H5R_type_t ref_type = H5R_OBJECT) const;
#endif /* H5_NO_DEPRECATED_SYMBOLS */

	// Retrieves the type of object that an object reference points to.
	H5O_type_t getRefObjType(void *ref, H5R_type_t ref_type = H5R_OBJECT) const;
	// Note: getRefObjType deprecates getObjType, but getObjType's name is
	// misleading, so getRefObjType is used in the new function instead.

	// Sets the comment for an HDF5 object specified by its name.
	void setComment(const char* name, const char* comment) const;
	void setComment(const H5std_string& name, const H5std_string& comment) const;
	void setComment(const char* comment) const;
	void setComment(const H5std_string& comment) const;

	// Retrieves comment for the HDF5 object specified by its name.
	ssize_t getComment(const char* name, size_t buf_size, char* comment) const;
	H5std_string getComment(const char* name, size_t buf_size=0) const;
	H5std_string getComment(const H5std_string& name, size_t buf_size=0) const;

	// Removes the comment for the HDF5 object specified by its name.
	void removeComment(const char* name) const;
	void removeComment(const H5std_string& name) const;

	// Creates a reference to a named object or to a dataset region
	// in this object.
	void reference(void* ref, const char* name, 
			H5R_type_t ref_type = H5R_OBJECT) const;
	void reference(void* ref, const H5std_string& name,
			H5R_type_t ref_type = H5R_OBJECT) const;
	void reference(void* ref, const char* name, const DataSpace& dataspace,
			H5R_type_t ref_type = H5R_DATASET_REGION) const;
	void reference(void* ref, const H5std_string& name, const DataSpace& dataspace,
			H5R_type_t ref_type = H5R_DATASET_REGION) const;

	// Open a referenced object whose location is specified by either
	// a file, an HDF5 object, or an attribute.
	void dereference(const H5Location& loc, const void* ref, H5R_type_t ref_type = H5R_OBJECT, const PropList& plist = PropList::DEFAULT);
	void dereference(const Attribute& attr, const void* ref, H5R_type_t ref_type = H5R_OBJECT, const PropList& plist = PropList::DEFAULT);

	// Retrieves a dataspace with the region pointed to selected.
	DataSpace getRegion(void *ref, H5R_type_t ref_type = H5R_DATASET_REGION) const;

// From CommonFG
	// Creates a new group at this location which can be a file
	// or another group.
	Group createGroup(const char* name, size_t size_hint = 0) const;
	Group createGroup(const H5std_string& name, size_t size_hint = 0) const;

	// Opens an existing group in a location which can be a file
	// or another group.
	Group openGroup(const char* name) const;
	Group openGroup(const H5std_string& name) const;

	// Creates a new dataset in this group.
	DataSet createDataSet(const char* name, const DataType& data_type, const DataSpace& data_space, const DSetCreatPropList& create_plist = DSetCreatPropList::DEFAULT) const;
	DataSet createDataSet(const H5std_string& name, const DataType& data_type, const DataSpace& data_space, const DSetCreatPropList& create_plist = DSetCreatPropList::DEFAULT) const;

	// Opens an existing dataset at this location.
	DataSet openDataSet(const char* name) const;
	DataSet openDataSet(const H5std_string& name) const;

	// Returns the value of a symbolic link.
	H5std_string getLinkval(const char* link_name, size_t size=0) const;
	H5std_string getLinkval(const H5std_string& link_name, size_t size=0) const;

	// Returns the number of objects in this group.
	hsize_t getNumObjs() const;

	// Retrieves the name of an object in this group, given the
	// object's index.
	H5std_string getObjnameByIdx(hsize_t idx) const;
	ssize_t getObjnameByIdx(hsize_t idx, char* name, size_t size) const;
	ssize_t getObjnameByIdx(hsize_t idx, H5std_string& name, size_t size) const;

	// Retrieves the type of an object in this file or group, given the
	// object's name
	H5O_type_t childObjType(const H5std_string& objname) const;
	H5O_type_t childObjType(const char* objname) const;
	H5O_type_t childObjType(hsize_t index, H5_index_t index_type=H5_INDEX_NAME, H5_iter_order_t order=H5_ITER_INC, const char* objname=".") const;

	// Returns the object header version of an object in this file or group,
	// given the object's name.
	unsigned childObjVersion(const char* objname) const;
	unsigned childObjVersion(const H5std_string& objname) const;

#ifndef H5_NO_DEPRECATED_SYMBOLS
	// Returns the type of an object in this group, given the
	// object's index.
	H5G_obj_t getObjTypeByIdx(hsize_t idx) const;
	H5G_obj_t getObjTypeByIdx(hsize_t idx, char* type_name) const;
	H5G_obj_t getObjTypeByIdx(hsize_t idx, H5std_string& type_name) const;

	// Returns information about an HDF5 object, given by its name,
	// at this location.
	void getObjinfo(const char* name, hbool_t follow_link, H5G_stat_t& statbuf) const;
	void getObjinfo(const H5std_string& name, hbool_t follow_link, H5G_stat_t& statbuf) const;
	void getObjinfo(const char* name, H5G_stat_t& statbuf) const;
	void getObjinfo(const H5std_string& name, H5G_stat_t& statbuf) const;

	// Iterates over the elements of this group - not implemented in
	// C++ style yet.
	int iterateElems(const char* name, int *idx, H5G_iterate_t op, void *op_data);
	int iterateElems(const H5std_string& name, int *idx, H5G_iterate_t op, void *op_data);
#endif /* H5_NO_DEPRECATED_SYMBOLS */

	// Creates a link of the specified type from new_name to current_name;
	// both names are interpreted relative to the specified location id.
	void link(H5L_type_t link_type, const char* curr_name, const char* new_name) const;
	void link(H5L_type_t link_type, const H5std_string& curr_name, const H5std_string& new_name) const;

	// Removes the specified name at this location.
	void unlink(const char* name) const;
	void unlink(const H5std_string& name) const;

	// Mounts the file 'child' onto this location.
	void mount(const char* name, const H5File& child, const PropList& plist) const;
	//void mount(const char* name, H5File& child, PropList& plist) const; // removed from 1.8.18 and 1.10.1
	void mount(const H5std_string& name, const H5File& child, const PropList& plist) const;
	//void mount(const H5std_string& name, H5File& child, PropList& plist) const; // removed from 1.8.18 and 1.10.1

	// Unmounts the file named 'name' from this parent location.
	void unmount(const char* name) const;
	void unmount(const H5std_string& name) const;

	// Renames an object at this location.
	void move(const char* src, const char* dst) const;
	void move(const H5std_string& src, const H5std_string& dst) const;

	// Opens a generic named datatype in this location.
	DataType openDataType(const char* name) const;
	DataType openDataType(const H5std_string& name) const;

	// Opens a named array datatype in this location.
	ArrayType openArrayType(const char* name) const;
	ArrayType openArrayType(const H5std_string& name) const;

	// Opens a named compound datatype in this location.
	CompType openCompType(const char* name) const;
	CompType openCompType(const H5std_string& name) const;

	// Opens a named enumeration datatype in this location.
	EnumType openEnumType(const char* name) const;
	EnumType openEnumType(const H5std_string& name) const;

	// Opens a named integer datatype in this location.
	IntType openIntType(const char* name) const;
	IntType openIntType(const H5std_string& name) const;

	// Opens a named floating-point datatype in this location.
	FloatType openFloatType(const char* name) const;
	FloatType openFloatType(const H5std_string& name) const;

	// Opens a named string datatype in this location.
	StrType openStrType(const char* name) const;
	StrType openStrType(const H5std_string& name) const;

	// Opens a named variable length datatype in this location.
	VarLenType openVarLenType(const char* name) const;
	VarLenType openVarLenType(const H5std_string& name) const;

// end From CommonFG

	///\brief Returns an identifier.
	//virtual hid_t getId() const;

	/// For subclasses, H5File and Group, to throw appropriate exception.
	virtual void throwException(const H5std_string& func_name, const H5std_string& msg) const;

	// Default constructor
	H5Location();

   protected:
#ifndef DOXYGEN_SHOULD_SKIP_THIS
	// *** Deprecation warning ***
	// The following two constructors are no longer appropriate after the
	// data member "id" had been moved to the sub-classes.
	// The copy constructor is a noop and is removed in 1.8.15 and the
	// other will be removed from 1.10 release, and then from 1.8 if its
	// removal does not raise any problems in two 1.10 releases.

	// Creates a copy of an existing object giving the location id.
	H5Location(const hid_t loc_id);

	// Creates a reference to an HDF5 object or a dataset region.
	void p_reference(void* ref, const char* name, hid_t space_id, H5R_type_t ref_type) const;

	// Dereferences a ref into an HDF5 id.
	hid_t p_dereference(hid_t loc_id, const void* ref, H5R_type_t ref_type, const PropList& plist, const char* from_func);

#ifndef H5_NO_DEPRECATED_SYMBOLS
	// Retrieves the type of object that an object reference points to.
	H5G_obj_t p_get_obj_type(void *ref, H5R_type_t ref_type) const;
#endif /* H5_NO_DEPRECATED_SYMBOLS */

	// Retrieves the type of object that an object reference points to.
	H5O_type_t p_get_ref_obj_type(void *ref, H5R_type_t ref_type) const;

        // Sets the identifier of this object to a new value. - this one
        // doesn't increment reference count
        virtual void p_setId(const hid_t new_id) = 0;

#endif // DOXYGEN_SHOULD_SKIP_THIS

	// Noop destructor.
	virtual ~H5Location();

}; /* end class H5Location */

#ifndef H5_NO_NAMESPACE
}
#endif
#endif // __H5Location_H