DcmPath Class Reference

Class representing a path of DICOM objects. More...

Public Member Functions
	DcmPath ()
	Constructor, creates an empty search result.
	DcmPath (const OFList< DcmPathNode * > &currentPath)
	Constructor, creates a search result from a list of search nodes. More...
void	append (DcmPathNode *node)
	Appends a search node at the end of the search result path. More...
void	deleteBackNode ()
	Removes last path node from path. More...
	OFListIterator (DcmPathNode *) begin()
	Returns iterator pointing to first path component. More...
DcmPathNode *	back ()
	Returns last path component. More...
	OFListIterator (DcmPathNode *) end()
	Returns iterator pointing to last path component. More...
Uint32	size () const
	Returns number of path components. More...
OFBool	empty () const
	Returns whether path is empty, ie does not contain any path nodes. More...
OFString	toString () const
	Returns a string representation of the path, e.g. "SourceImageSequence[0].ReferencedSOPInstanceUID". More...
OFBool	containsGroup (const Uint16 groupNo) const
	Returns whether the path contains tags of a given group. More...
	~DcmPath ()
	Desctructor, cleans up memory of path nodes. More...

Static Public Member Functions
static OFCondition	separatePathNodes (const OFString &path, OFList< OFString > &result)
	Returns a string representation of each path node separately. More...
static OFCondition	parseItemNoFromPath (OFString &path, Uint32 &itemNo, OFBool &wasWildcard)
	Helper function for findOrCreatePath(). More...
static OFCondition	parseTagFromPath (OFString &path, DcmTag &tag)
	Function that parses a tag from the beginning of a path string. More...

Private Member Functions
	DcmPath (const DcmPath &rhs)
	Private undefined copy constructor.
DcmPath &	operator= (const DcmPath &arg)
	Private undefined assignment operator.

Private Attributes
OFList< DcmPathNode * >	m_path
	Internal list representing the nodes in the path.

Detailed Description

Class representing a path of DICOM objects.

A path is a "way" through a DICOM dataset, i.e. it starts e.g. with an item, followed by a sequence originally contained in this item. The sequence then could be followed by another item which is part of the sequence and so on. Thus the path should be well-formed, but if it is created manually (e.g. using append()) there is no corresponding checking.

Constructor & Destructor Documentation

DcmPath::DcmPath

(

const OFList< DcmPathNode * > &

currentPath

)

Constructor, creates a search result from a list of search nodes.

Parameters

currentPath

[in] The list of search nodes representing a "path" through a DICOM dataset

DcmPath::~DcmPath

(

)

Desctructor, cleans up memory of path nodes.

Does not delete the DcmObjects the nodes point to (this is also not done by the desctructor of the path nodes, so the caller is responsible for freeing any related DICOM objects.

Member Function Documentation

void DcmPath::append

(

DcmPathNode *

node

)

Appends a search node at the end of the search result path.

It is not checked whether the resulting path is still valid.

Parameters

node	[in] The node to append.

DcmPathNode* DcmPath::back

(

)

Returns last path component.

Returns

The last path component, NULL if none exists.

OFBool DcmPath::containsGroup

(

const Uint16

groupNo

)

const

Returns whether the path contains tags of a given group.

Might be useful for looking after (unwanted) meta header tags etc.

Parameters

groupNo

[in] The group number to look for

Returns

OFTrue if group number is found in path, OFFalse otherwise

void DcmPath::deleteBackNode

(

)

Removes last path node from path.

Also frees memory of path node but does not free memory of the underlying DICOM item or element.

Returns

none

OFBool DcmPath::empty

(

)

const

Returns whether path is empty, ie does not contain any path nodes.

Returns

OFTrue, if path is empty, OFFalse otherwise

DcmPath::OFListIterator

(

DcmPathNode *

)

Returns iterator pointing to first path component.

Returns

Iterator to first path node.

DcmPath::OFListIterator

(

DcmPathNode *

)

Returns iterator pointing to last path component.

Returns

Iterator to last path node.

static OFCondition DcmPath::parseItemNoFromPath ( OFString &  path, Uint32 &  itemNo, OFBool &  wasWildcard  )

static

Helper function for findOrCreatePath().

Parses an item number from the beginning of the path string. The item number must be positive, starting with 0. The path must start like "[itemnumber]...".

Parameters

path	[in/out] The path starting with the item number in square brackets, e.g. "[3]". The parsed item number and a potentially following "." are removed from the path
itemNo	[out] The parsed item number. If a wildcard was parsed, this output parameter is not set at all.
wasWildcard	[out] Is set to OFTrue, if wildcard was parsed (instead of concrete item number).

Returns

EC_Normal, if concrete item number or wildcard was parsed

static OFCondition DcmPath::parseTagFromPath ( OFString &  path, DcmTag &  tag  )

static

Function that parses a tag from the beginning of a path string.

The tag has to be either in numeric format, e.g. "(0010,0010)" or a dictionary name, e.g. "PatientName". If successful, the parsed tag is removed from the path string.

Parameters

path	[in/out] The path string, starting with the attribute to parse
tag	[out] The tag parsed

Returns

EC_Normal if successful, error code otherwise

static OFCondition DcmPath::separatePathNodes ( const OFString &  path, OFList< OFString > &  result  )

static

Returns a string representation of each path node separately.

Tags are represented as numbers surrounded by braces "(gggg,eeee)", not dictionary names. Items are represented by a number or wildcard in square brackets, eg. "[12]" or "[*]".

Parameters

path	The path to parse into different nodes
result	[out] List containing the resulting strings

Returns

none

Uint32 DcmPath::size

(

)

const

Returns number of path components.

Returns

The number of path components

OFString DcmPath::toString

(

)

const

Returns a string representation of the path, e.g. "SourceImageSequence[0].ReferencedSOPInstanceUID".

Returns

String representing path

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The documentation for this class was generated from the following file:

• dcmdata/include/dcmtk/dcmdata/dcpath.h