OFFIS DCMTK: DcmSequenceOfItems Class Reference

DcmSequenceOfItems::DcmSequenceOfItems	(	const DcmTag &	tag,
		const Uint32	len = `0`,
		OFBool	readAsUN = `OFFalse`
	)

constructor

Parameters:

	tag	attribute tag
	len	length of the attribute value
	readAsUN	flag indicating whether the sequence should be read (interpreted) as a UN element with Implicit VR Little Endian encoding

Referenced by clone().

DcmSequenceOfItems::DcmSequenceOfItems ( const DcmSequenceOfItems & oldSeq )

copy constructor

Parameters:

oldSeq

element to be copied

DcmSequenceOfItems& DcmSequenceOfItems::operator= ( const DcmSequenceOfItems & obj )

copy assignment operator

Parameters:

obj

element to be copied

virtual DcmObject* DcmSequenceOfItems::clone ( ) const [inline, virtual]

clone method

Returns:: deep copy of this object

Implements DcmObject.

Reimplemented in DcmFileFormat, and DcmPixelSequence.

Definition at line 80 of file dcsequen.h.

References DcmSequenceOfItems().

virtual OFCondition DcmSequenceOfItems::copyFrom ( const DcmObject & rhs ) [virtual]

Virtual object copying.

This method can be used for DcmObject and derived classes to get a deep copy of an object. Internally the assignment operator is called if the given DcmObject parameter is of the same type as "this" object instance. If not, an error is returned. This function permits copying an object by value in a virtual way which therefore is different to just calling the assignment operator of DcmElement which could result in slicing the object.

Parameters:

rhs

- [in] The instance to copy from. Has to be of the same class type as "this" object

Returns:: EC_Normal if copying was successful, error otherwise

Reimplemented from DcmElement.

Reimplemented in DcmFileFormat, and DcmPixelSequence.

virtual DcmEVR DcmSequenceOfItems::ident ( void ) const [inline, virtual]

return identifier for this class.

Every class derived from this class returns a unique value of type enum DcmEVR for this call. This is used as a "poor man's RTTI" to correctly identify instances derived from this class even on compilers not supporting RTTI.

Returns:: type identifier of this class

Implements DcmObject.

Reimplemented in DcmFileFormat, and DcmPixelSequence.

Definition at line 105 of file dcsequen.h.

virtual OFBool DcmSequenceOfItems::isLeaf ( ) const [inline, virtual]

check if this element is a leaf node in a dataset tree.

All subclasses of DcmElement except for DcmSequenceOfItems are leaf nodes, while DcmSequenceOfItems, DcmItem, DcmDataset etc. are not.

Returns:: true if leaf node, false otherwise.

Reimplemented from DcmElement.

Definition at line 113 of file dcsequen.h.

virtual void DcmSequenceOfItems::print	(	STD_NAMESPACE ostream &	out,
		const size_t	flags = `0`,
		const int	level = `0`,
		const char *	pixelFileName = `NULL`,
		size_t *	pixelCounter = `NULL`
	)			`[virtual]`

print object to a stream

Parameters:

	out	output stream
	flags	optional flag used to customize the output (see DCMTypes::PF_xxx)
	level	current level of nested items. Used for indentation.
	pixelFileName	not used (used in certain sub-classes of this class)
	pixelCounter	not used (used in certain sub-classes of this class)

Implements DcmObject.

Reimplemented in DcmFileFormat, and DcmPixelSequence.

virtual OFCondition DcmSequenceOfItems::checkValue	(	const OFString &	card = `"1-n"`,
		const OFBool	oldFormat = `OFFalse`
	)			`[virtual]`

check whether stored value conforms to the VR and to the specified VM

Parameters:

	card	cardinality (number of items) to be checked for. (valid values: "1", "1-2", "1-3", "1-8", "1-99", "1-n", "2", "2-n", "2-2n", "3", "3-n", "3-3n", "4", "6", "9", "16", "32"), parameter used to specify the value multiplicity for non-sequence attributes
	oldFormat	parameter not used for this VR (only for DA, TM, PN)

Returns:: status of the check, EC_Normal if value is correct, an error code otherwise

Reimplemented from DcmElement.

virtual unsigned long DcmSequenceOfItems::getVM ( ) [inline, virtual]

get value multiplicity

Returns:: always returns 1 (according to the DICOM standard)

Implements DcmObject.

Definition at line 142 of file dcsequen.h.

virtual OFCondition DcmSequenceOfItems::computeGroupLengthAndPadding	(	const E_GrpLenEncoding	glenc,
		const E_PaddingEncoding	padenc = `EPD_noChange`,
		const E_TransferSyntax	xfer = `EXS_Unknown`,
		const E_EncodingType	enctype = `EET_ExplicitLength`,
		const Uint32	padlen = `0`,
		const Uint32	subPadlen = `0`,
		Uint32	instanceLength = `0`
	)			`[virtual]`

This function takes care of group length and padding elements in the current element list according to what is specified in glenc and padenc.

If required, this function does the following two things: a) it calculates the group length of all groups which are contained in this item and sets the calculated values in the corresponding group length elements and b) it inserts a corresponding padding element (or, in case of sequences: padding elements) with a corresponding correct size into the element list.

Parameters:

	glenc	Encoding type for group length; specifies what shall be done with group length tags.
	padenc	Encoding type for padding; specifies what shall be done with padding tags.
	xfer	The transfer syntax that shall be used.
	enctype	Encoding type for sequences; specifies how sequences will be handled.
	padlen	The length up to which the dataset shall be padded, if padding is desired.
	subPadlen	For sequences (ie sub elements), the length up to which item shall be padded, if padding is desired.
	instanceLength	Number of extra bytes added to the item/dataset length used when computing the padding; this parameter is for instance used to pass the length of the file meta header from the DcmFileFormat to the DcmDataset object.

Returns:: status, EC_Normal if successful, an error code otherwise

virtual Uint32 DcmSequenceOfItems::calcElementLength	(	const E_TransferSyntax	xfer,
		const E_EncodingType	enctype
	)			`[virtual]`

calculate the length of this DICOM element when encoded with the given transfer syntax and the given encoding type for sequences.

For elements, the length includes the length of the tag, length field, VR field and the value itself, for items and sequences it returns the length of the complete item or sequence including delimitation tags if applicable. If length encodig is set to be explicit and the total sequence size is larger than the available 32-bit length field, then undefined length is returned. If "dcmWriteOversizedSeqsAndItemsUndefined" is disabled, also the internal DcmObject errorFlag is set to EC_SeqOrItemContentOverflow in case the sequence content (excluding tag header etc.) is already too large.

Parameters:

	xfer	transfer syntax for length calculation
	enctype	sequence encoding type for length calculation

Returns:: length of DICOM element

Reimplemented from DcmElement.

Reimplemented in DcmFileFormat, and DcmPixelSequence.

virtual Uint32 DcmSequenceOfItems::getLength	(	const E_TransferSyntax	xfer = `EXS_LittleEndianImplicit`,
		const E_EncodingType	enctype = `EET_UndefinedLength`
	)			`[virtual]`

calculate the value length (without attribute tag, VR and length field) of this DICOM element when encoded with the given transfer syntax and the given encoding type for sequences.

If length encodig is set to be explicit and the total sequence size is larger than the available 32-bit length field, then undefined length is returned. If "dcmWriteOversizedSeqsAndItemsImplicit" is disabled, also the internal DcmObject errorFlag is set to EC_SeqOrItemContentOverflow.

Parameters:

	xfer	transfer syntax for length calculation
	enctype	sequence encoding type for length calculation

Returns:: value length of DICOM element

Reimplemented from DcmElement.

virtual void DcmSequenceOfItems::transferInit ( ) [virtual]

initialize the transfer state of this object.

This method must be called before this object is written to a stream or read (parsed) from a stream.

Reimplemented from DcmElement.

virtual void DcmSequenceOfItems::transferEnd ( ) [virtual]

finalize the transfer state of this object.

This method must be called when reading/writing this object from/to a stream has been completed.

Reimplemented from DcmObject.

virtual OFBool DcmSequenceOfItems::canWriteXfer	(	const E_TransferSyntax	oldXfer,
		const E_TransferSyntax	newXfer
	)			`[virtual]`

check if this DICOM object can be encoded in the given transfer syntax.

Parameters:

	newXfer	transfer syntax in which the DICOM object is to be encoded
	oldXfer	transfer syntax in which the DICOM object was read or created.

Returns:: true if object can be encoded in desired transfer syntax, false otherwise.

Reimplemented from DcmElement.

Reimplemented in DcmFileFormat, and DcmPixelSequence.

virtual OFCondition DcmSequenceOfItems::read	(	DcmInputStream &	inStream,
		const E_TransferSyntax	xfer,
		const E_GrpLenEncoding	glenc = `EGL_noChange`,
		const Uint32	maxReadLength = `DCM_MaxReadLength`
	)			`[virtual]`

This function reads the information of all attributes which are captured in the input stream and captures this information in elementList.

Each attribute is represented as an element in this list. If not all information for an attribute could be read from the stream, the function returns EC_StreamNotifyClient.

Parameters:

	inStream	The stream which contains the information.
	xfer	The transfer syntax which was used to encode the information in inStream.
	glenc	Encoding type for group length; specifies what will be done with group length tags.
	maxReadLength	Maximum read length for reading an attribute value.

Returns:: status, EC_Normal if successful, an error code otherwise

Reimplemented from DcmElement.

Reimplemented in DcmFileFormat, and DcmPixelSequence.

virtual OFCondition DcmSequenceOfItems::write	(	DcmOutputStream &	outStream,
		const E_TransferSyntax	oxfer,
		const E_EncodingType	enctype,
		DcmWriteCache *	wcache
	)			`[virtual]`

write object to a stream

Parameters:

	outStream	DICOM output stream
	oxfer	output transfer syntax
	enctype	encoding types (undefined or explicit length)
	wcache	pointer to write cache object, may be NULL

Returns:: status, EC_Normal if successful, an error code otherwise

Reimplemented from DcmElement.

Reimplemented in DcmFileFormat, and DcmPixelSequence.

virtual OFCondition DcmSequenceOfItems::writeXML	(	STD_NAMESPACE ostream &	out,
		const size_t	flags = `0`
	)			`[virtual]`

write object in XML format

Parameters:

	out	output stream to which the XML document is written
	flags	optional flag used to customize the output (see DCMTypes::XF_xxx)

Returns:: status, EC_Normal if successful, an error code otherwise

Reimplemented from DcmElement.

Reimplemented in DcmFileFormat.

virtual OFCondition DcmSequenceOfItems::writeSignatureFormat	(	DcmOutputStream &	outStream,
		const E_TransferSyntax	oxfer,
		const E_EncodingType	enctype,
		DcmWriteCache *	wcache
	)			`[virtual]`

special write method for creation of digital signatures

Parameters:

	outStream	DICOM output stream
	oxfer	output transfer syntax
	enctype	encoding types (undefined or explicit length)
	wcache	pointer to write cache object, may be NULL

Returns:: status, EC_Normal if successful, an error code otherwise

Reimplemented from DcmElement.

Reimplemented in DcmPixelSequence.

virtual OFBool DcmSequenceOfItems::isSignable ( ) const [virtual]

returns true if the current object may be included in a digital signature

Returns:: true if signable, false otherwise

Reimplemented from DcmObject.

virtual OFBool DcmSequenceOfItems::containsUnknownVR ( ) const [virtual]

returns true if the object contains an element with Unknown VR at any nesting level

Returns:: true if the object contains an element with Unknown VR, false otherwise

Reimplemented from DcmObject.

virtual OFBool DcmSequenceOfItems::containsExtendedCharacters ( const OFBool checkAllStrings = OFFalse ) [virtual]

check if this object contains non-ASCII characters at any nesting level

Parameters:

checkAllStrings

if true, also check elements with string values not affected by SpecificCharacterSet (0008,0005), default: only check PN, LO, LT, SH, ST, UT

Returns:: true if object contains non-ASCII characters, false otherwise

Reimplemented from DcmObject.

virtual OFBool DcmSequenceOfItems::isAffectedBySpecificCharacterSet ( ) const [virtual]

check if this object is affected by SpecificCharacterSet at any nesting level.

In detail, it is checked whether this object contains any data elements that according to their VR are affected by the SpecificCharacterSet (0008,0005) element. This is true for the following VRs: PN, LO, LT, SH, ST and UT

Returns:: true if object is affected by SpecificCharacterSet, false otherwise

Reimplemented from DcmObject.

virtual unsigned long DcmSequenceOfItems::card ( ) [virtual]

get cardinality of this sequence

Returns:: number of items in this sequence

Referenced by DSRDocumentTreeNode::isSigned().

virtual OFCondition DcmSequenceOfItems::prepend ( DcmItem * item ) [virtual]

insert the given item at the start of the item list maintained by this sequence.

Ownership of the item, which must be allocated on the heap, is transferred to the sequence.

Parameters:

item

pointer to DcmItem instance allocated on the heap, must not be NULL.

Returns:: EC_Normal if successful, an error code otherwise

virtual OFCondition DcmSequenceOfItems::insert	(	DcmItem *	item,
		unsigned long	where = `DCM_EndOfListIndex`,
		OFBool	before = `OFFalse`
	)			`[virtual]`

insert the given item at the given position within the item list maintained by this sequence.

Ownership of the item, which must be allocated on the heap, is transferred to the sequence.

Parameters:

	item	pointer to DcmItem instance allocated on the heap, must not be NULL.
	where	index of the item after or before which the new item is to be inserted. Value must be < card() or equal to DCM_EndOfListIndex.
	before	indicates whether the new item should be inserted before or after the item identified by "where"

Returns:: EC_Normal if successful, an error code otherwise

Reimplemented in DcmPixelSequence.

virtual OFCondition DcmSequenceOfItems::append ( DcmItem * item ) [virtual]

insert the given item at the end of the item list maintained by this sequence.

Ownership of the item, which must be allocated on the heap, is transferred to the sequence.

Parameters:

item

pointer to DcmItem instance allocated on the heap, must not be NULL.

Returns:: EC_Normal if successful, an error code otherwise

virtual OFCondition DcmSequenceOfItems::insertAtCurrentPos	(	DcmItem *	item,
		OFBool	before = `OFFalse`
	)			`[virtual]`

insert new item a current position.

The current position is stored internally in the 'itemList' member variable.

Parameters:

	item	new item to be inserted
	before	flag indicating whether to insert the item before (OFFalse) or after (OFTrue) the current position

Returns:: status, EC_Normal upon success, an error code otherwise

virtual DcmItem* DcmSequenceOfItems::getItem ( const unsigned long num ) [virtual]

access an item from the sequence.

This method returns a pointer to one of the items in the list, and not a copy.

Parameters:

num

index number of item, must be < card()

Returns:: pointer to item if found, NULL if num >= card()

Reimplemented in DcmPixelSequence.

virtual OFCondition DcmSequenceOfItems::nextObject	(	DcmStack &	stack,
		const OFBool	intoSub
	)			`[virtual]`

this method enables a stack based, depth-first traversal of a complete hierarchical DICOM dataset (that is, classes derived from DcmItem or DcmSequenceOfItems).

With each call of this method, the next object in the tree is located and marked on the stack.

Parameters:

	stack	"cursor" for current position in the dataset. The stack will contain a pointer to each dataset, sequence, item and element from the main dataset down to the current element, and is updated upon each call to this method. An empty stack is equivalent to a stack containing a pointer to this object only.
	intoSub	if true, the nextObject method will perform a hierarchical search through the dataset (depth-first), if false, only the current container object will be traversed (e.g., all elements of an item or all items of a sequence).

Returns:: EC_Normal if value length is correct, an error code otherwise

Reimplemented from DcmObject.

virtual DcmObject* DcmSequenceOfItems::nextInContainer ( const DcmObject * obj ) [virtual]

this method is only used in container classes, that is, DcmItem and DcmSequenceOfItems.

It returns a pointer to the next object in the list AFTER the given object. If the caller passes NULL, a pointer to the first object in the list is returned. If the given object is not found, the given object is the last one in the list or the list is empty, NULL is returned.

Parameters:

obj

pointer to one object in the container; we are looking for the next entry after this one. NULL if looking for the first entry.

Returns:: pointer to next object in container or NULL if not found

Reimplemented from DcmObject.

virtual DcmItem* DcmSequenceOfItems::remove ( const unsigned long num ) [virtual]

remove item from list.

If found, the item is not deleted but returned to the caller who is responsible for further management of the DcmItem object.

Parameters:

num

index number of item, must be < card()

Returns:: pointer to DcmItem if found, NULL otherwise

Reimplemented in DcmFileFormat, and DcmPixelSequence.

virtual DcmItem* DcmSequenceOfItems::remove ( DcmItem * item ) [virtual]

remove item from list.

If found, the item is not deleted but returned to the caller who is responsible for further management of the DcmItem object.

Parameters:

item

pointer to item to be removed from list

Returns:: pointer to item if found, NULL otherwise

Reimplemented in DcmFileFormat, and DcmPixelSequence.

virtual OFBool DcmSequenceOfItems::isEmpty ( const OFBool normalize = OFTrue ) [virtual]

check if this sequence is empty

Parameters:

normalize

not used for this class

Returns:: true if sequence is empty, i.e. has no items, false otherwise

Reimplemented from DcmObject.

virtual OFCondition DcmSequenceOfItems::clear ( ) [virtual]

clear (remove) attribute value

Returns:: EC_Normal if successful, an error code otherwise

Reimplemented from DcmElement.

Reimplemented in DcmFileFormat.

virtual OFCondition DcmSequenceOfItems::verify ( const OFBool autocorrect = OFFalse ) [virtual]

check the currently stored element value

Parameters:

autocorrect

correct value length if OFTrue

Returns:: status, EC_Normal if value length is correct, an error code otherwise

Implements DcmObject.

virtual OFCondition DcmSequenceOfItems::search	(	const DcmTagKey &	xtag,
		DcmStack &	resultStack,
		E_SearchMode	mode = `ESM_fromHere`,
		OFBool	searchIntoSub = `OFTrue`
	)			`[virtual]`

a complex, stack-based, hierarchical search method.

It allows for a search for a DICOM object with a given attribute within a given container, hierarchically, from a starting position identified through a cursor stack.

Parameters:

	xtag	the DICOM attribute tag we are searching for
	resultStack	Depending on the search mode (see below), this parameter either serves as an input and output parameter, or as an output parameter only (the latter being the default). When used as an input parameter, the cursor stack defines the start position for the search within a hierarchical DICOM dataset. Upon successful return, the stack contains the position of the element found, in the form of a pointer to each dataset, sequence, item and element from the main dataset down to the found element.
	mode	search mode, controls how the search stack is handled. In the default mode, ESM_fromHere, the stack is ignored on input, and the search starts in the object for which this method is called. In the other modes, the stack is used both as an input and an output parameter and defines the starting point for the search.
	searchIntoSub	if true, the search will be performed hierarchically descending into the sequences and items of the dataset. If false, only the current container (sequence or item) will be traversed.

Returns:: EC_Normal if found, EC_TagNotFound if not found, an error code is something went wrong.

Reimplemented from DcmObject.

virtual OFCondition DcmSequenceOfItems::loadAllDataIntoMemory ( void ) [virtual]

this method loads all attribute values maintained by this object and all sub-objects (in case of a container such as DcmDataset) into memory.

After a call to this method, the file from which a dataset was read may safely be deleted or replaced. For large files, this method may obviously allocate large amounts of memory.

Returns:: EC_Normal if successful, an error code otherwise

Reimplemented from DcmElement.

virtual OFCondition DcmSequenceOfItems::getPartialValue	(	void *	targetBuffer,
		const Uint32	offset,
		Uint32	numBytes,
		DcmFileCache *	cache = `NULL`,
		E_ByteOrder	byteOrder = `gLocalByteOrder`
	)			`[virtual]`

Copy numBytes bytes of data from the attribute value in byteOrder byte order to targetBuffer, starting at byte offset offset of the attribute value.

This method does not cause the complete attribute value to be read into main memory. Subsequent calls for the same partial value may cause repeated access to file if the attribute value is kept in file.

Parameters:

	targetBuffer	pointer to target buffer, must not be NULL. Buffer size must be at least numBytes bytes.
	offset	byte offset within the attribute value from where to start copying
	numBytes	number of bytes to copy.
	cache	file cache object that may be passed to multiple subsequent calls to this method for the same file; the file cache will then keep a file handle open, thus improving performance. Optional, may be NULL
	byteOrder	byte order desired byte order of attribute value in memory buffer. Default is the local byte order of the machine.

Returns:: EC_Normal upon success, an error code otherwise

Reimplemented from DcmElement.

virtual OFCondition DcmSequenceOfItems::readTagAndLength	(	DcmInputStream &	inStream,
		const E_TransferSyntax	xfer,
		DcmTag &	tag,
		Uint32 &	length
	)			`[protected, virtual]`

This function reads tag and length information from inStream and returns this information to the caller.

When reading information, the transfer syntax which was passed is accounted for. If the transfer syntax shows an explicit value representation, the data type of this object is also read from the stream. In general, this function follows the rules which are specified in the DICOM standard (see DICOM standard (year 2000) part 5, section 7) (or the corresponding section in a later version of the standard) concerning the encoding of a dataset.

Parameters:

	inStream	The stream which contains the information.
	xfer	The transfer syntax which was used to encode the information in inStream.
	tag	Contains in the end the tag that was read.
	length	Contains in the end the length value that was read.

Returns:: status, EC_Normal if successful, an error code otherwise

virtual OFCondition DcmSequenceOfItems::makeSubObject	(	DcmObject *&	subObject,
		const DcmTag &	newTag,
		const Uint32	newLength
	)			`[protected, virtual]`

helper function for read().

Create sub-object (item, item delimiter or sequence delimiter) of the appropriate type depending on the tag.

Parameters:

	subObject	upon success, a pointer to the newly created object is returned in this parameter
	newTag	tag of the sub-object to be created
	newLength	length of the sub-object to be created

Returns:: status, EC_Normal if successful, an error code otherwise

Reimplemented in DcmPixelSequence.

OFCondition DcmSequenceOfItems::readSubItem	(	DcmInputStream &	inStream,
		const DcmTag &	newTag,
		const Uint32	newLength,
		const E_TransferSyntax	xfer,
		const E_GrpLenEncoding	glenc,
		const Uint32	maxReadLength = `DCM_MaxReadLength`
	)			`[protected]`

helper function for read().

Create sub-object (item or pixel item) and call read() for this sub-object.

Parameters:

	inStream	The stream which contains the information.
	newTag	attribute tag for sub-object
	newLength	length of the sub-object to be created
	xfer	The transfer syntax which was used to encode the information in inStream.
	glenc	Encoding type for group length; specifies what will be done with group length tags.
	maxReadLength	Maximum read length for reading an attribute value.

Returns:: status, EC_Normal if successful, an error code otherwise

virtual OFCondition DcmSequenceOfItems::searchSubFromHere	(	const DcmTagKey &	tag,
		DcmStack &	resultStack,
		const OFBool	searchIntoSub
	)			`[protected, virtual]`

helper function for search().

May only be called if item list is non-empty. Performs hierarchical search for given tag and pushes pointer of sub-element on result stack if found

Parameters:

	tag	tag key to be searched
	resultStack	upon successful return, pointer to element pushed onto this stack
	searchIntoSub	flag indicating whether recursive search is desired

Returns:: EC_Normal if tag found and stack modified, EC_TagNotFound if tag not found and stack unmodified

static OFCondition DcmSequenceOfItems::writeTagAndVR	(	DcmOutputStream &	outStream,
		const DcmTag &	tag,
		DcmEVR	vr,
		const E_TransferSyntax	oxfer
	)			`[static, private]`

static helper method used in writeSignatureFormat().

This function resembles DcmObject::writeTagAndLength() but only writes the tag, VR and reserved field.

Parameters:

	outStream	stream to write to
	tag	attribute tag
	vr	attribute VR as reported by getVR
	oxfer	output transfer syntax

Returns:: EC_Normal if successful, an error code otherwise

OFBool DcmSequenceOfItems::lastItemComplete [private]

flag used during suspended I/O.

Indicates whether the last item was completely or only partially read/written during the last call to read/write.

Definition at line 564 of file dcsequen.h.

offile_off_t DcmSequenceOfItems::fStartPosition [private]

used during reading.

Contains the position in the stream where the sequence started (needed for calculating the remaining number of bytes available for a fixed-length sequence).

Definition at line 570 of file dcsequen.h.

DcmSequenceOfItems Class Reference

Public Member Functions

Protected Member Functions

Protected Attributes

Static Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation


Public Member Functions
	DcmSequenceOfItems (const DcmTag &tag, const Uint32 len=0, OFBool readAsUN=OFFalse)
	constructor
	DcmSequenceOfItems (const DcmSequenceOfItems &oldSeq)
	copy constructor
virtual	~DcmSequenceOfItems ()
	destructor
DcmSequenceOfItems &	operator= (const DcmSequenceOfItems &obj)
	copy assignment operator
OFCondition	error () const
	returns current status flag
virtual DcmObject *	clone () const
	clone method
virtual OFCondition	copyFrom (const DcmObject &rhs)
	Virtual object copying.
virtual DcmEVR	ident () const
	return identifier for this class.
virtual OFBool	isLeaf () const
	check if this element is a leaf node in a dataset tree.
virtual void	print (STD_NAMESPACE ostream &out, const size_t flags=0, const int level=0, const char pixelFileName=NULL, size_t pixelCounter=NULL)
	print object to a stream
virtual OFCondition	checkValue (const OFString &card="1-n", const OFBool oldFormat=OFFalse)
	check whether stored value conforms to the VR and to the specified VM
virtual unsigned long	getVM ()
	get value multiplicity
virtual OFCondition	computeGroupLengthAndPadding (const E_GrpLenEncoding glenc, const E_PaddingEncoding padenc=EPD_noChange, const E_TransferSyntax xfer=EXS_Unknown, const E_EncodingType enctype=EET_ExplicitLength, const Uint32 padlen=0, const Uint32 subPadlen=0, Uint32 instanceLength=0)
	This function takes care of group length and padding elements in the current element list according to what is specified in glenc and padenc.
virtual Uint32	calcElementLength (const E_TransferSyntax xfer, const E_EncodingType enctype)
	calculate the length of this DICOM element when encoded with the given transfer syntax and the given encoding type for sequences.
virtual Uint32	getLength (const E_TransferSyntax xfer=EXS_LittleEndianImplicit, const E_EncodingType enctype=EET_UndefinedLength)
	calculate the value length (without attribute tag, VR and length field) of this DICOM element when encoded with the given transfer syntax and the given encoding type for sequences.
virtual void	transferInit ()
	initialize the transfer state of this object.
virtual void	transferEnd ()
	finalize the transfer state of this object.
virtual OFBool	canWriteXfer (const E_TransferSyntax oldXfer, const E_TransferSyntax newXfer)
	check if this DICOM object can be encoded in the given transfer syntax.
virtual OFCondition	read (DcmInputStream &inStream, const E_TransferSyntax xfer, const E_GrpLenEncoding glenc=EGL_noChange, const Uint32 maxReadLength=DCM_MaxReadLength)
	This function reads the information of all attributes which are captured in the input stream and captures this information in elementList.
virtual OFCondition	write (DcmOutputStream &outStream, const E_TransferSyntax oxfer, const E_EncodingType enctype, DcmWriteCache *wcache)
	write object to a stream
virtual OFCondition	writeXML (STD_NAMESPACE ostream &out, const size_t flags=0)
	write object in XML format
virtual OFCondition	writeSignatureFormat (DcmOutputStream &outStream, const E_TransferSyntax oxfer, const E_EncodingType enctype, DcmWriteCache *wcache)
	special write method for creation of digital signatures
virtual OFBool	isSignable () const
	returns true if the current object may be included in a digital signature
virtual OFBool	containsUnknownVR () const
	returns true if the object contains an element with Unknown VR at any nesting level
virtual OFBool	containsExtendedCharacters (const OFBool checkAllStrings=OFFalse)
	check if this object contains non-ASCII characters at any nesting level
virtual OFBool	isAffectedBySpecificCharacterSet () const
	check if this object is affected by SpecificCharacterSet at any nesting level.
virtual unsigned long	card ()
	get cardinality of this sequence
virtual OFCondition	prepend (DcmItem *item)
	insert the given item at the start of the item list maintained by this sequence.
virtual OFCondition	insert (DcmItem *item, unsigned long where=DCM_EndOfListIndex, OFBool before=OFFalse)
	insert the given item at the given position within the item list maintained by this sequence.
virtual OFCondition	append (DcmItem *item)
	insert the given item at the end of the item list maintained by this sequence.
virtual OFCondition	insertAtCurrentPos (DcmItem *item, OFBool before=OFFalse)
	insert new item a current position.
virtual DcmItem *	getItem (const unsigned long num)
	access an item from the sequence.
virtual OFCondition	nextObject (DcmStack &stack, const OFBool intoSub)
	this method enables a stack based, depth-first traversal of a complete hierarchical DICOM dataset (that is, classes derived from DcmItem or DcmSequenceOfItems).
virtual DcmObject *	nextInContainer (const DcmObject *obj)
	this method is only used in container classes, that is, DcmItem and DcmSequenceOfItems.
virtual DcmItem *	remove (const unsigned long num)
	remove item from list.
virtual DcmItem *	remove (DcmItem *item)
	remove item from list.
virtual OFBool	isEmpty (const OFBool normalize=OFTrue)
	check if this sequence is empty
virtual OFCondition	clear ()
	clear (remove) attribute value
virtual OFCondition	verify (const OFBool autocorrect=OFFalse)
	check the currently stored element value
virtual OFCondition	search (const DcmTagKey &xtag, DcmStack &resultStack, E_SearchMode mode=ESM_fromHere, OFBool searchIntoSub=OFTrue)
	a complex, stack-based, hierarchical search method.
virtual OFCondition	loadAllDataIntoMemory (void)
	this method loads all attribute values maintained by this object and all sub-objects (in case of a container such as DcmDataset) into memory.
virtual OFCondition	getPartialValue (void targetBuffer, const Uint32 offset, Uint32 numBytes, DcmFileCache cache=NULL, E_ByteOrder byteOrder=gLocalByteOrder)
	Copy numBytes bytes of data from the attribute value in byteOrder byte order to targetBuffer, starting at byte offset offset of the attribute value.
Protected Member Functions
virtual OFCondition	readTagAndLength (DcmInputStream &inStream, const E_TransferSyntax xfer, DcmTag &tag, Uint32 &length)
	This function reads tag and length information from inStream and returns this information to the caller.
virtual OFCondition	makeSubObject (DcmObject *&subObject, const DcmTag &newTag, const Uint32 newLength)
	helper function for read().
OFCondition	readSubItem (DcmInputStream &inStream, const DcmTag &newTag, const Uint32 newLength, const E_TransferSyntax xfer, const E_GrpLenEncoding glenc, const Uint32 maxReadLength=DCM_MaxReadLength)
	helper function for read().
virtual OFCondition	searchSubFromHere (const DcmTagKey &tag, DcmStack &resultStack, const OFBool searchIntoSub)
	helper function for search().
Protected Attributes
DcmList *	itemList
	the list of items maintained by this sequence object
Static Private Member Functions
static OFCondition	writeTagAndVR (DcmOutputStream &outStream, const DcmTag &tag, DcmEVR vr, const E_TransferSyntax oxfer)
	static helper method used in writeSignatureFormat().
Private Attributes
OFBool	lastItemComplete
	flag used during suspended I/O.
offile_off_t	fStartPosition
	used during reading.
OFBool	readAsUN_
	true if this sequence has been instantiated while reading an UN element with undefined length