DCMTK data part class map

DcmObject是dcm所有数据对象的基类，它实现了一些基本的方法。它派生了DcmElement类和DcmItem类。DcmElement是dicom文件的基本元素。DcmItem是这些数据元素的一个集合（它的主要数据成员是DcmElement对象的list），DcmItem的派生类DcmDataset更能体现这一点。数据集描述现实世界信息对象的实例。数据集由数据元素构成。数据元素包含对象的属性代码值。这些属性的特定内容和语义学在信息对象定义（参阅DICOM标准中的第3部分）中指定

它的方法列表如下：
 

Public Member Functions
	DcmObject (const DcmTag &tag, const Uint32 len=0)
	constructor. 通过一个tag 和 这个tag对应的value的长度作为构造函数的两个参数。
	DcmObject (const DcmObject &obj)
	copy constructor  复制构造函数 作用见C++ 将对象传递给函数和函数返回对象时潜在的问题
virtual	~DcmObject ()
	destructor
DcmObject &	operator= (const DcmObject &obj)
	assignment operator
virtual DcmEVR	ident () const=0
	get type identifier (abstract) 类型识别 （抽象类）
DcmEVR	getVR () const
OFBool	isaString () const
virtual OFBool	isLeaf () const=0
virtual void	print (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
OFCondition	error () const
E_TransferState	transferState () const
virtual void	transferInit (void)
virtual void	transferEnd (void)
Uint16	getGTag () const
Uint16	getETag () const
const DcmTag &	getTag () const
void	setGTag (Uint16 gtag)
virtual OFCondition	setVR (DcmEVR)
virtual unsigned long	getVM ()=0
virtual Uint32	calcElementLength (const E_TransferSyntax xfer, const E_EncodingType enctype)=0
virtual Uint32	getLength (const E_TransferSyntax xfer=EXS_LittleEndianImplicit, const E_EncodingType enctype=EET_UndefinedLength)=0
virtual OFBool	canWriteXfer (const E_TransferSyntax newXfer, const E_TransferSyntax oldXfer)=0
virtual OFCondition	read (DcmInputStream &inStream, const E_TransferSyntax ixfer, const E_GrpLenEncoding glenc=EGL_noChange, const Uint32 maxReadLength=DCM_MaxReadLength)=0
virtual OFCondition	write (DcmOutputStream &outStream, const E_TransferSyntax oxfer, const E_EncodingType enctype=EET_UndefinedLength)=0
	write object to a stream (abstract)
virtual OFCondition	writeXML (ostream &out, const size_t flags=0)
	write object in XML format to a stream 将对象写成xml流
virtual OFCondition	writeSignatureFormat (DcmOutputStream &outStream, const E_TransferSyntax oxfer, const E_EncodingType enctype=EET_UndefinedLength)=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 OFCondition	clear ()=0
virtual OFCondition	verify (const OFBool autocorrect=OFFalse)=0
virtual DcmObject *	nextInContainer (const DcmObject *obj)
virtual OFCondition	nextObject (DcmStack &stack, const OFBool intoSub)
virtual OFCondition	search (const DcmTagKey &xtag, DcmStack &resultStack, E_SearchMode mode=ESM_fromHere, OFBool searchIntoSub=OFTrue)
virtual OFCondition	searchErrors (DcmStack &resultStack)
virtual OFCondition	loadAllDataIntoMemory ()=0
Protected Member Functions
void	printNestingLevel (ostream &out, const size_t flags, const int level)
	print line indentation, e.g.
void	printInfoLineStart (ostream &out, const size_t flags, const int level, DcmTag *tag=NULL)
	print beginning of the info line.
void	printInfoLineEnd (ostream &out, const size_t flags, const unsigned long printedLength=0xffffffff, DcmTag *tag=NULL)
	print end of the info line.
virtual void	printInfoLine (ostream &out, const size_t flags, const int level=0, const char *info=NULL, DcmTag *tag=NULL)
	print given text with element information.
virtual OFCondition	writeTagAndLength (DcmOutputStream &outStream, const E_TransferSyntax oxfer, Uint32 &writtenBytes) const
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.
Static Protected Member Functions
OFCondition	writeTag (DcmOutputStream &outStream, const DcmTag &tag, const E_TransferSyntax oxfer)
Protected Attributes
DcmTag	Tag
Uint32	Length
E_TransferState	fTransferState
OFCondition	errorFlag
Uint32	fTransferredBytes