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.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
 * If you do not have 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

namespace H5 {

// Class forwarding
class ArrayType;
class LinkAccPropList;
class VarLenType;

//  Inheritance: IdComponent
class H5_DLLCPP H5Location : public IdComponent {
   public:
        // Checks if a link of a given name exists in a location
        bool exists(const char* name, const LinkAccPropList& lapl = LinkAccPropList::DEFAULT) const;
        bool exists(const H5std_string& name, const LinkAccPropList& lapl = LinkAccPropList::DEFAULT) const;

        // 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);
        // Removed in 1.10.1, because H5Location is baseclass
        //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;

        // Determines the number of attributes belong to this object.
        int getNumAttrs() 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;

// end From CommonFG

        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);

#endif // DOXYGEN_SHOULD_SKIP_THIS

        // Noop destructor.
        virtual ~H5Location();

}; // end of H5Location
} // namespace H5

#endif // __H5Location_H