Abstract base class for most classes in module dcmdata. More...

Inheritance diagram for DcmObject:

Classes
class	PrintHelper
	helper class to print a DcmObject to an ostream using operator<< More...
Public Member Functions
	DcmObject (const DcmTag &tag, const Uint32 len=0)
	constructor.
	DcmObject (const DcmObject &obj)
	copy constructor
virtual	~DcmObject ()
	destructor
virtual DcmObject *	clone () const =0
	clone method
DcmObject &	operator= (const DcmObject &obj)
	copy assignment operator
virtual OFCondition	copyFrom (const DcmObject &rhs)=0
	Virtual object copying.
virtual DcmEVR	ident () const =0
	return identifier for this class.
DcmEVR	getVR () const
	return the value representation assigned to this object.
OFBool	isaString () const
	check if this element is a string type, based on the VR.
virtual OFBool	isLeaf () const =0
	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)=0
	print object to a stream
E_TransferState	transferState () const
	return the current transfer (read/write) state of this object.
virtual void	transferInit (void)
	initialize the transfer state of this object.
virtual void	transferEnd (void)
	finalize the transfer state of this object.
DcmItem *	getRootItem ()
	get root dataset/item (top-level) that contains this object.
virtual DcmItem *	getParentItem ()
	get parent item of this object.
DcmObject *	getParent ()
	get parent of this object.
const DcmObject *	getParent () const
	get parent of this object.
void	setParent (DcmObject *parent)
	set parent of this object.
Uint16	getGTag () const
	return the group number of the attribute tag for this object
Uint16	getETag () const
	return the element number of the attribute tag for this object
const DcmTag &	getTag () const
	return const reference to the attribute tag for this object
void	setGTag (Uint16 gtag)
	assign group tag (but not element tag) of the attribute tag for this object.
virtual OFCondition	setVR (DcmEVR)
	assign a new Value Representation (VR) to this object.
virtual unsigned long	getVM ()=0
	return value multiplicity of the current object
virtual Uint32	calcElementLength (const E_TransferSyntax xfer, const E_EncodingType enctype)=0
	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)=0
	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 OFBool	canWriteXfer (const E_TransferSyntax newXfer, const E_TransferSyntax oldXfer)=0
	check if this DICOM object can be encoded in the given transfer syntax.
virtual OFCondition	read (DcmInputStream &inStream, const E_TransferSyntax ixfer, const E_GrpLenEncoding glenc=EGL_noChange, const Uint32 maxReadLength=DCM_MaxReadLength)=0
	read object from a stream.
virtual OFCondition	write (DcmOutputStream &outStream, const E_TransferSyntax oxfer, const E_EncodingType enctype, DcmWriteCache *wcache)=0
	write object to a stream (abstract)
virtual OFCondition	writeXML (STD_NAMESPACE ostream &out, const size_t flags=0)
	write object in XML format to a stream
virtual OFCondition	writeSignatureFormat (DcmOutputStream &outStream, const E_TransferSyntax oxfer, const E_EncodingType enctype, DcmWriteCache *wcache)=0
	special write method for creation of digital signatures (abstract)
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
virtual OFBool	isAffectedBySpecificCharacterSet () const
	check if this object is affected by SpecificCharacterSet
virtual OFCondition	convertCharacterSet (DcmSpecificCharacterSet &converter)
	convert this object from the currently selected source character set to the currently selected destination character set (if affected by SpecificCharacterSet)
virtual OFBool	isEmpty (const OFBool normalize=OFTrue)
	check if this object is empty
virtual OFCondition	clear ()=0
	clear (remove) attribute value
virtual OFCondition	verify (const OFBool autocorrect=OFFalse)=0
	check the currently stored element value
virtual DcmObject *	nextInContainer (const DcmObject *obj)
	this method is only used in container classes derived from this class, that is, DcmItem and DcmSequenceOfItems.
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 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 ()=0
	this method loads all attribute values maintained by this object and all sub-objects (in case of a container such as DcmDataset) into memory.
Uint32	getLengthField () const
	return the current value of the Length field (which is different from the functionality of the public getLength method).
Protected Member Functions
void	printNestingLevel (STD_NAMESPACE ostream &out, const size_t flags, const int level)
	print line indentation, e.g.
void	printInfoLineStart (STD_NAMESPACE ostream &out, const size_t flags, const int level, DcmTag *tag=NULL)
	print beginning of the info line.
void	printInfoLineEnd (STD_NAMESPACE ostream &out, const size_t flags, const unsigned long printedLength=0xffffffff, DcmTag *tag=NULL)
	print end of the info line.
virtual void	printInfoLine (STD_NAMESPACE ostream &out, const size_t flags, const int level=0, const char info=NULL, DcmTag tag=NULL, const OFBool isInfo=OFTrue)
	print given text with element information.
virtual OFCondition	writeTagAndLength (DcmOutputStream &outStream, const E_TransferSyntax oxfer, Uint32 &writtenBytes) const
	write tag, VR and length field to the given output stream
virtual Uint32	getTagAndLengthSize (const E_TransferSyntax oxfer) const
	return the number of bytes needed to serialize the tag, VR and length information of the current object using the given transfer syntax.
const char *	getTagName ()
	return the DICOM attribute tag name for this object.
void	setTagVR (DcmEVR vr)
	set the VR for this attribute
E_TransferState	getTransferState () const
	return the current transfer state of this object during serialization/deserialization
void	setTransferState (E_TransferState newState)
	set the current transfer state of this object during serialization/deserialization
Uint32	getTransferredBytes () const
	return the number of transferred bytes for this object during serialization/deserialization
void	setTransferredBytes (Uint32 val)
	set the number of transferred bytes for this object during serialization/deserialization
void	incTransferredBytes (Uint32 val)
	add to the number of transferred bytes for this object during serialization/deserialization
void	setLengthField (Uint32 val)
	set the current value of the Length field
Static Protected Member Functions
static OFCondition	writeTag (DcmOutputStream &outStream, const DcmTag &tag, const E_TransferSyntax oxfer)
	static helper function that writes a given attribute tag to a binary output stream using the byte order indicated by the transfer syntax.
Protected Attributes
OFCondition	errorFlag
	error flag for this object.
Private Attributes
DcmTag	Tag
	the DICOM attribute tag and VR for this object
Uint32	Length
	the length of this attribute as read from stream, may be undefined length
E_TransferState	fTransferState
	transfer state during read and write operations
Uint32	fTransferredBytes
	number of bytes already read/written during transfer
DcmObject *	Parent
	pointer to parent object if contained in a dataset/item (might be NULL)

Detailed Description

Abstract base class for most classes in module dcmdata.

As a rule of thumb, everything that is either a dataset or that can be identified with a DICOM attribute tag is derived from class DcmObject.

Constructor & Destructor Documentation

DcmObject::DcmObject	(	const DcmTag &	tag,
		const Uint32	len = `0`
	)

constructor.

Create new object from given tag and length.

Parameters:

tag	DICOM tag for the new element
len	value length for the new element

DcmObject::DcmObject ( const DcmObject & obj )

copy constructor

Parameters:

obj	item to be copied

Member Function Documentation

virtual Uint32 DcmObject::calcElementLength	(	const E_TransferSyntax	xfer,
		const E_EncodingType	enctype
	)		`[pure 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. Never returns undefined length.

Parameters:

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

Returns:: length of DICOM element

Implemented in DcmPixelData, DcmSequenceOfItems, DcmFileFormat, DcmDataset, DcmItem, DcmMetaInfo, DcmPixelSequence, and DcmElement.

virtual OFBool DcmObject::canWriteXfer	(	const E_TransferSyntax	newXfer,
		const E_TransferSyntax	oldXfer
	)		`[pure 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.

Implemented in DcmPixelData, DcmSequenceOfItems, DcmItem, DcmDataset, DcmFileFormat, DcmPixelSequence, DcmElement, and DcmOtherByteOtherWord.

virtual OFCondition DcmObject::clear ( ) [pure virtual]

clear (remove) attribute value

Returns:: EC_Normal if successful, an error code otherwise

Implemented in DcmItem, DcmSequenceOfItems, DcmElement, DcmFileFormat, DcmByteString, DcmDataset, and DcmUnsignedLongOffset.

virtual DcmObject* DcmObject::clone ( ) const [pure virtual]

clone method

Returns:: deep copy of this object

Implemented in DcmPixelData, DcmDirectoryRecord, DcmItem, DcmCharString, DcmFileFormat, DcmMetaInfo, DcmSequenceOfItems, DcmOverlayData, DcmByteString, DcmDataset, DcmDecimalString, DcmTime, DcmApplicationEntity, DcmAgeString, DcmAttributeTag, DcmCodeString, DcmDate, DcmDateTime, DcmFloatingPointDouble, DcmFloatingPointSingle, DcmLongString, DcmOtherByteOtherWord, DcmOtherFloat, DcmPersonName, DcmShortString, DcmSignedLong, DcmSignedShort, DcmUnsignedLong, DcmUnsignedShort, DcmPixelSequence, DcmPixelItem, DcmIntegerString, DcmShortText, DcmUniqueIdentifier, DcmUnsignedLongOffset, DcmUnlimitedText, DcmLongText, and DcmPolymorphOBOW.

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

check if this object contains non-ASCII characters

Parameters:

checkAllStrings not used in this class

Returns:: always returns false, i.e. no extended characters used

Reimplemented in DcmSequenceOfItems, DcmItem, DcmByteString, and DcmCharString.

virtual OFBool DcmObject::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 in DcmSequenceOfItems, and DcmItem.

virtual OFCondition DcmObject::convertCharacterSet ( DcmSpecificCharacterSet & converter ) [virtual]

convert this object from the currently selected source character set to the currently selected destination character set (if affected by SpecificCharacterSet)

Parameters:

converter character set converter to be used to convert the element values

Returns:: always returns EC_Normal, since there is nothing to do in this base class

Reimplemented in DcmFileFormat, DcmItem, DcmSequenceOfItems, DcmDirectoryRecord, and DcmCharString.

virtual OFCondition DcmObject::copyFrom ( const DcmObject & rhs ) [pure 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

Implemented in DcmPixelData, DcmDirectoryRecord, DcmItem, DcmCharString, DcmFileFormat, DcmMetaInfo, DcmSequenceOfItems, DcmOverlayData, DcmPixelItem, DcmByteString, DcmDataset, DcmDecimalString, DcmTime, DcmApplicationEntity, DcmAgeString, DcmAttributeTag, DcmCodeString, DcmDate, DcmDateTime, DcmFloatingPointDouble, DcmFloatingPointSingle, DcmLongString, DcmOtherByteOtherWord, DcmOtherFloat, DcmPersonName, DcmShortString, DcmSignedLong, DcmSignedShort, DcmUnsignedLong, DcmUnsignedShort, DcmPixelSequence, DcmIntegerString, DcmShortText, DcmUniqueIdentifier, DcmUnsignedLongOffset, DcmUnlimitedText, DcmLongText, DcmElement, and DcmPolymorphOBOW.

Uint16 DcmObject::getETag ( ) const [inline]

return the element number of the attribute tag for this object

Returns:: element number of the attribute tag for this object

Uint16 DcmObject::getGTag ( ) const [inline]

return the group number of the attribute tag for this object

Returns:: group number of the attribute tag for this object

virtual Uint32 DcmObject::getLength	(	const E_TransferSyntax	xfer = `EXS_LittleEndianImplicit`,
		const E_EncodingType	enctype = `EET_UndefinedLength`
	)		`[pure 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.

Never returns undefined length.

Parameters:

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

Returns:: value length of DICOM element

Implemented in DcmPixelData, DcmSequenceOfItems, DcmItem, DcmByteString, and DcmElement.

Uint32 DcmObject::getLengthField ( ) const [inline]

return the current value of the Length field (which is different from the functionality of the public getLength method).

Only needed for internal purposes and for checker tools that verify values against the length field.

Returns:: current value of length field

DcmObject* DcmObject::getParent ( ) [inline]

get parent of this object.

If this object is an element that has been inserted into a dataset/item, the parent is this particular dataset/item. If this object is an item that has been inserted into a sequence, the parent is this particular sequence. If this object has not been inserted into a dataset/item or sequence, NULL is returned.

Returns:: pointer to the parent of this object (might be NULL)

const DcmObject* DcmObject::getParent ( ) const [inline]

get parent of this object.

If this object is an element that has been inserted into a dataset/item, the parent is this particular dataset/item. If this object is an item that has been inserted into a sequence, the parent is this particular sequence. If this object has not been inserted into a dataset/item or sequence, NULL is returned.

Returns:: pointer to the parent of this object (might be NULL)

virtual DcmItem* DcmObject::getParentItem ( ) [virtual]

get parent item of this object.

In case of a top-level element, this is either the main dataset or the file meta-information. In case of a nested element, this is the surrounding item.

Returns:: pointer to the parent item of this object (might be NULL)

Reimplemented in DcmItem, and DcmPixelItem.

DcmItem* DcmObject::getRootItem ( )

get root dataset/item (top-level) that contains this object.

Internally, the list of parent pointers is followed in order to find the root. If this object has no parent item, a pointer to this object is returned instead.

Returns:: pointer to the root dataset/item (might be NULL)

const DcmTag& DcmObject::getTag ( ) const [inline]

return const reference to the attribute tag for this object

Returns:: const reference to the attribute tag for this object

virtual Uint32 DcmObject::getTagAndLengthSize ( const E_TransferSyntax oxfer ) const [protected, virtual]

return the number of bytes needed to serialize the tag, VR and length information of the current object using the given transfer syntax.

Parameters:

oxfer The transfer syntax used for encoding

Returns:: number of bytes, may be 8 or 12 depending on VR and transfer syntax.

const char* DcmObject::getTagName ( ) [inline, protected]

return the DICOM attribute tag name for this object.

If not known yet, will be looked up in the dictionary and cached. Therefore, method is not const.

Returns:: tag name for this attribute

Uint32 DcmObject::getTransferredBytes ( ) const [inline, protected]

return the number of transferred bytes for this object during serialization/deserialization

Returns:: number of transferred bytes

E_TransferState DcmObject::getTransferState ( ) const [inline, protected]

return the current transfer state of this object during serialization/deserialization

Returns:: current transfer state of this object

virtual unsigned long DcmObject::getVM ( ) [pure virtual]

return value multiplicity of the current object

Returns:: value multiplicity of the current object

Implemented in DcmSequenceOfItems, DcmItem, DcmUnlimitedText, DcmSignedShort, DcmAttributeTag, DcmFloatingPointDouble, DcmFloatingPointSingle, DcmSignedLong, DcmShortText, DcmUnsignedLong, DcmUnsignedShort, DcmLongText, DcmOtherByteOtherWord, DcmOtherFloat, and DcmByteString.

DcmEVR DcmObject::getVR ( ) const [inline]

return the value representation assigned to this object.

If object was read from a stream, this method returns the VR that was defined in the stream for this object. It is, therefore, possible that the VR does not match the one defined in the data dictionary for the tag assigned to this object.

Returns:: VR of this object

virtual DcmEVR DcmObject::ident ( ) const [pure 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

Implemented in DcmPixelData, DcmDirectoryRecord, DcmOverlayData, DcmItem, DcmSequenceOfItems, DcmFileFormat, DcmMetaInfo, DcmUnlimitedText, DcmByteString, DcmDataset, DcmDecimalString, DcmTime, DcmApplicationEntity, DcmAgeString, DcmAttributeTag, DcmCodeString, DcmDate, DcmDateTime, DcmFloatingPointDouble, DcmFloatingPointSingle, DcmLongString, DcmOtherByteOtherWord, DcmOtherFloat, DcmPersonName, DcmShortString, DcmSignedLong, DcmSignedShort, DcmUnsignedLong, DcmUnsignedShort, DcmPixelSequence, DcmIntegerString, DcmShortText, DcmUniqueIdentifier, DcmUnsignedLongOffset, DcmLongText, and DcmPixelItem.

void DcmObject::incTransferredBytes ( Uint32 val ) [inline, protected]

add to the number of transferred bytes for this object during serialization/deserialization

Parameters:

val	number of additional transferred bytes to add to existing value

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

check if this object is affected by SpecificCharacterSet

Returns:: always returns false, i.e. not affected by SpecificCharacterSet

Reimplemented in DcmSequenceOfItems, DcmItem, DcmByteString, and DcmCharString.

OFBool DcmObject::isaString ( ) const [inline]

check if this element is a string type, based on the VR.

Since the check is based on the VR and not on the class, the result of this method is not a guarantee that the object can be safely casted to one of the string-VR subclasses.

Returns:: true if this object is a string VR, false otherwise

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

check if this object is empty

Parameters:

normalize normalize value before checking (ignore non-significant characters)

Returns:: true if object is empty, i.e. has no value, false otherwise

Reimplemented in DcmItem, DcmSequenceOfItems, and DcmByteString.

virtual OFBool DcmObject::isLeaf ( ) const [pure 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.

Implemented in DcmItem, DcmElement, and DcmSequenceOfItems.

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

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

Returns:: true if signable, false otherwise

Reimplemented in DcmSequenceOfItems.

virtual OFCondition DcmObject::loadAllDataIntoMemory ( ) [pure 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

Implemented in DcmItem, DcmSequenceOfItems, DcmPixelData, and DcmElement.

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

this method is only used in container classes derived from this class, 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 in DcmSequenceOfItems, and DcmItem.

virtual OFCondition DcmObject::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 in DcmSequenceOfItems, and DcmItem.

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

copy assignment operator

Parameters:

obj	object to be copied

Returns:: reference to this object

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

Implemented in DcmPixelData, DcmDirectoryRecord, DcmDataset, DcmItem, DcmByteString, DcmOtherByteOtherWord, DcmFileFormat, DcmSequenceOfItems, DcmMetaInfo, DcmFloatingPointDouble, DcmFloatingPointSingle, DcmAttributeTag, DcmSignedShort, DcmSignedLong, DcmUnsignedLong, DcmUnsignedShort, DcmUniqueIdentifier, DcmPixelItem, and DcmPixelSequence.

virtual void DcmObject::printInfoLine	(	STD_NAMESPACE ostream &	out,
		const size_t	flags,
		const int	level = `0`,
		const char *	info = `NULL`,
		DcmTag *	tag = `NULL`,
		const OFBool	isInfo = `OFTrue`
	)		`[protected, virtual]`

print given text with element information.

Calls printInfoLineStart() and printInfoLineEnd() to frame the 'info' text.

Parameters:

out	output stream
flags	used to customize the output (see DCMTypes::PF_xxx)
level	current level of nested items. Used for indentation.
info	text to be printed
tag	optional tag used to print the data element information
isInfo	optional flag indicating whether this text is really given for informational purposes only. Used to choose the correct output color.

void DcmObject::printInfoLineEnd	(	STD_NAMESPACE ostream &	out,
		const size_t	flags,
		const unsigned long	printedLength = `0xffffffff`,
		DcmTag *	tag = `NULL`
	)		`[protected]`

print end of the info line.

The default output is length, value multiplicity and tag name, though other visualizations are possible depending on the value of 'flags'.

Parameters:

out	output stream
flags	used to customize the output (see DCMTypes::PF_xxx)
printedLength	number of characters printed after line start. Used for padding purposes.
tag	optional tag used to print the data element information

void DcmObject::printInfoLineStart	(	STD_NAMESPACE ostream &	out,
		const size_t	flags,
		const int	level,
		DcmTag *	tag = `NULL`
	)		`[protected]`

print beginning of the info line.

The default output is tag and value representation, though other visualizations are possible depending on the value of 'flags'.

Parameters:

out	output stream
flags	used to customize the output (see DCMTypes::PF_xxx)
level	current level of nested items. Used for indentation.
tag	optional tag used to print the data element information

void DcmObject::printNestingLevel	(	STD_NAMESPACE ostream &	out,
		const size_t	flags,
		const int	level
	)		`[protected]`

print line indentation, e.g.

a couple of spaces for each nesting level. Depending on the value of 'flags' other visualizations are also possible.

Parameters:

out	output stream
flags	used to customize the output (see DCMTypes::PF_xxx)
level	current level of nested items. Used for indentation.

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

read object from a stream.

Parameters:

inStream	DICOM input stream
ixfer	transfer syntax to use when parsing
glenc	handling of group length parameters
maxReadLength	attribute values larger than this value are skipped while parsing and read later upon first access if the stream type supports this.

Returns:: EC_Normal if successful, an error code otherwise

Implemented in DcmPixelData, DcmDirectoryRecord, DcmSequenceOfItems, DcmItem, DcmDataset, DcmPixelSequence, DcmFileFormat, DcmMetaInfo, DcmElement, and DcmPolymorphOBOW.

virtual OFCondition DcmObject::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 in DcmItem, DcmSequenceOfItems, and DcmDirectoryRecord.

void DcmObject::setGTag ( Uint16 gtag ) [inline]

assign group tag (but not element tag) of the attribute tag for this object.

This is sometimes useful when creating repeating group elements.

Parameters:

gtag	new attribute group tag

void DcmObject::setLengthField ( Uint32 val ) [inline, protected]

set the current value of the Length field

Parameters:

val	new value of the Length field

void DcmObject::setParent ( DcmObject * parent ) [inline]

set parent of this object.

NULL means no parent. NB: This method is used by derived classes for internal purposes only.

void DcmObject::setTagVR ( DcmEVR vr ) [inline, protected]

set the VR for this attribute

Parameters:

vr	new VR for this attribute.

void DcmObject::setTransferredBytes ( Uint32 val ) [inline, protected]

set the number of transferred bytes for this object during serialization/deserialization

Parameters:

val	number of transferred bytes

void DcmObject::setTransferState ( E_TransferState newState ) [inline, protected]

set the current transfer state of this object during serialization/deserialization

Parameters:

newState new transfer state of this object

virtual OFCondition DcmObject::setVR ( DcmEVR ) [inline, virtual]

assign a new Value Representation (VR) to this object.

This operation is only supported for very few subclasses derived from this class, in particular for classes handling pixel data which may either be of OB or OW value representation.

Parameters:

vr	value representation

Returns:: EC_Normal if successful, an error code otherwise

Reimplemented in DcmPixelData, and DcmOtherByteOtherWord.

virtual void DcmObject::transferEnd ( void ) [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 in DcmPixelData, DcmSequenceOfItems, DcmItem, DcmPolymorphOBOW, and DcmMetaInfo.

virtual void DcmObject::transferInit ( void ) [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 in DcmPixelData, DcmSequenceOfItems, DcmItem, DcmPolymorphOBOW, DcmElement, and DcmMetaInfo.

E_TransferState DcmObject::transferState ( ) const [inline]

return the current transfer (read/write) state of this object.

Returns:: transfer state of this object

virtual OFCondition DcmObject::verify ( const OFBool autocorrect = OFFalse ) [pure 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

Implemented in DcmItem, DcmSequenceOfItems, DcmDirectoryRecord, DcmOtherByteOtherWord, DcmByteString, DcmAttributeTag, DcmFloatingPointDouble, DcmFloatingPointSingle, DcmSignedLong, DcmSignedShort, DcmUnsignedLong, DcmUnsignedShort, DcmUnsignedLongOffset, and DcmCharString.

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

write object to a stream (abstract)

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

Implemented in DcmPixelData, DcmSequenceOfItems, DcmItem, DcmDataset, DcmPixelSequence, DcmFileFormat, DcmElement, DcmMetaInfo, DcmOtherByteOtherWord, DcmByteString, and DcmPolymorphOBOW.

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

special write method for creation of digital signatures (abstract)

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

Implemented in DcmPixelData, DcmSequenceOfItems, DcmDataset, DcmItem, DcmPixelSequence, DcmElement, DcmOtherByteOtherWord, DcmByteString, DcmPolymorphOBOW, and DcmPixelItem.

static OFCondition DcmObject::writeTag	(	DcmOutputStream &	outStream,
		const DcmTag &	tag,
		const E_TransferSyntax	oxfer
	)		`[static, protected]`

static helper function that writes a given attribute tag to a binary output stream using the byte order indicated by the transfer syntax.

Parameters:

outStream	output stream
tag	tag to write to the stream
oxfer	transfer syntax defining the byte order

Returns:: EC_Normal if successful, an error code otherwise

virtual OFCondition DcmObject::writeTagAndLength	(	DcmOutputStream &	outStream,
		const E_TransferSyntax	oxfer,
		Uint32 &	writtenBytes
	)		const `[protected, virtual]`

write tag, VR and length field to the given output stream

Parameters:

outStream	output stream
oxfer	transfer syntax for writing
writtenBytes	number of bytes written to stream returned in this parameter

Returns:: EC_Normal if successful, an error code otherwise

Reimplemented in DcmPixelItem.

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

write object in XML format to a stream

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, always returns EC_Illegal Call

Reimplemented in DcmPixelData, DcmDirectoryRecord, DcmSequenceOfItems, DcmDataset, DcmItem, DcmFileFormat, DcmElement, DcmMetaInfo, DcmPersonName, DcmOtherByteOtherWord, DcmDecimalString, DcmPixelItem, and DcmOtherFloat.

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

dcmdata/include/dcmtk/dcmdata/dcobject.h

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