class MemBufInputSource : public InputSource

This class is a derivative of the standard InputSource class

Inheritance:


Public Methods

BinInputStream* makeStream () const
This method will return a binary input stream derivative that will parse from the memory buffer
void setCopyBufToStream (const bool newState)
By default, for safety's sake, each newly created stream from this input source will make its own copy of the buffer to stream from

Inherited from InputSource:

Public

protected Constructors and Destructor

InputSource()
Default constructor
InputSource(const XMLCh* const systemId)
Constructor with a system identifier as XMLCh type
InputSource( const XMLCh* const systemId, const XMLCh* const publicId )
Constructor with a system and public identifiers
InputSource(const char* const systemId)
Constructor witha system identifier as string
InputSource( const char* const systemId, const char* const publicId )
Constructor witha system and public identifiers

Destructor

virtual ~InputSource()
Destructor

Getter methods

const XMLCh* getEncoding() const
An input source can be set to force the parser to assume a particular encoding for the data that input source reprsents, via the setEncoding() method
const XMLCh* getPublicId() const
Get the public identifier for this input source
const XMLCh* getSystemId() const
Get the system identifier for this input source

Setter methods

void setEncoding(const XMLCh* const encodingStr)
Set the encoding which will be required for use with the XML text read via a stream opened by this input source
void setPublicId(const XMLCh* const publicId)
Set the public identifier for this input source
void setSystemId(const XMLCh* const systemId)
Set the system identifier for this input source

Virtual input source interface

virtual BinInputStream* makeStream() const
Makes the byte stream for this input source

Documentation

This class is a derivative of the standard InputSource class. It provides for the parser access to data stored in a memory buffer. The type of buffer and its host specific attributes are of little concern here. The only real requirement is that the memory be readable by the current process. Note that the memory buffer size is expressed in bytes, not in characters. If you pass it text data, you must account for the bytes per character when indicating the buffer size. As with all InputSource derivatives. The primary objective of an input source is to create an input stream via which the parser can spool in data from the referenced source. In this case, there are two options available. The passed buffer can be adopted or merely referenced. If it is adopted, then it must be dynamically allocated and will be destroyed when the input source is destroyed (no reference counting!.) If not adopted, the caller must insure that it remains valid until the input source object is destroyed. The other option indicates whether each stream created for this input source should get its own copy of the data, or whether it should just stream the data directly from this object's copy of the data. The same rules apply here, in that the buffer must either be copied by the stream or it must remain valid until the stream is destroyed.
MemBufInputSource( const XMLByte* const srcDocBytes, const unsigned int byteCount, const XMLCh* const bufId, const bool adoptBuffer = false )
A memory buffer input source is constructed from a buffer of byte data, and the count of bytes in that buffer. The parser will parse from this memory buffer until it has eaten the indicated number of bytes. Note that the system id provided serves two purposes. Firstly it is going to be displayed in error messages as the source of the error. And secondly, any entities which are refered to from this entity via relative paths/URLs will be relative to this fake system id.
Parameters:
srcDocBytes - The actual data buffer to be parsed from.
byteCount - The count of bytes (not characters, bytes!) in the buffer. @Param bufId A fake system id for the buffer. @Param adoptBuffer Indicates whether this object should adopt the buffer (i.e. make a copy of it) or just use it in place.

MemBufInputSource( const XMLByte* const srcDocBytes, const unsigned int byteCount, const char* const bufId, const bool adoptBuffer = false )
This constructor is identical to the previous one, except that it takes the fake system id in local code page form and transcodes it internally

~MemBufInputSource()
If the buffer was adopted, the copy made during construction is deleted at this point

BinInputStream* makeStream() const
This method will return a binary input stream derivative that will parse from the memory buffer. If setCopyBufToStream() has been set, then the stream will make its own copy. Otherwise, it will use the buffer as is (in which case it must remain valid until the stream is no longer in use, i.e. the parse completes.)
Returns:
A dynamically allocated binary input stream derivative that can parse from the memory buffer.

void setCopyBufToStream(const bool newState)
By default, for safety's sake, each newly created stream from this input source will make its own copy of the buffer to stream from. This avoids having to deal with aliasing of the buffer for simple work. But, for higher performance applications or for large buffers, this is obviously not optimal. In such cases, you can call this method to turn off that default action. Once turned off, the streams will just get a pointer to the buffer and parse directly from that. In this case, you must insure that the buffer remains valid for as long as any parse events are still using it.
Parameters:
newState - The new boolean flag state to set.


This class has no child classes.

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Xerces-C XML Parser for C++ Version 1.1
Copyright © 2000 The Apache Software Foundation. All Rights Reserved.

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