CharacterDataRef Interface

Table 2-4 summarizes the methods available through CharacterDataRef interface.

Table 2-4 Summary of CharacterDataRef Methods; Dom Package

Function	Summary
appendData()	Append data to end of node's current data.
deleteData()	Remove part of node's data.
freeString()	Deallocate the string allocated by `substringData`.
getData()	Return node's data.
getLength()	Return length of node's data.
insertData()	Insert string into node's current data.
replaceData()	Replace part of node's data.
setData()	Set node's data.
substringData()	Get substring of node's data.

appendData()

Append a string to the end of a CharacterData node's data. The appended data should be in the data encoding. It will not be verified, converted, or checked.

Syntax

void appendData( 
   oratext* data) 
throw (DOMException);

Parameter	Description
data	data to append

deleteData()

Remove a range of characters from a CharacterData node's data. The offset is zero-based, so offset zero refers to the start of the data. Both offset and count are in characters, not bytes. If the sum of offset and count exceeds the data length then all characters from offset to the end of the data are deleted.

Syntax

void deleteData( 
   ub4 offset, 
   ub4 count) 
throw (DOMException);

Parameter	Description
offset	character offset where deletion starts
count	number of characters to delete

freeString()

Deallocates the string allocated by substringData(). It is Oracle's extension.

Syntax

void freeString( 
   oratext* str);

Parameter	Description
str	string

getData()

Returns the data for a CharacterData node (type text, comment or CDATA) in the data encoding.

Syntax

oratext* getData() const;

Returns

(oratext*) node's data

getLength()

Returns the length of the data for a CharacterData node (type Text, Comment or CDATA) in characters (not bytes).

Syntax

ub4 getLength() const;

Returns

(ub4) length in characters (not bytes!) of node's data

insertData()

Insert a string into a CharacterData node's data at the specified position. The inserted data must be in the data encoding. It will not be verified, converted, or checked. The offset is specified as characters, not bytes. The offset is zero-based, so inserting at offset zero prepends the data.

Syntax

void insertData( 
   ub4 offset,
   oratext* data) 
throw (DOMException);

Parameter	Description
offset	character offset where insertion starts
data	data to insert

replaceData()

Replaces a range of characters in a CharacterData node's data with a new string. The offset is zero-based, so offset zero refers to the start of the data. The replacement data must be in the data encoding. It will not be verified, converted, or checked. The offset and count are both in characters, not bytes. If the sum of offset and count exceeds length, then all characters to the end of the data are replaced.

Syntax

void replaceData( 
   ub4 offset, 
   ub4 count, 
   oratext* data)
throw (DOMException);

Parameter	Description
offset	offset
count	number of characters to replace
data	data

setData()

Sets data for a CharacterData node (type text, comment or CDATA), replacing the old data. The new data is not verified, converted, or checked -- it should be in the data encoding.

Syntax

void setData( 
   oratext* data) 
throw (DOMException);

Parameter	Description
data	data

substringData()

Returns a range of character data from a CharacterData node (type Text, Comment or CDATA). Since the data is in the data encoding, offset and count are in characters, not bytes. The beginning of the string is offset 0. If the sum of offset and count exceeds the length, then all characters to the end of the data are returned. The substring is permanently allocated in the context managed memory and should be explicitly deallocated by freeString

Syntax

oratext* substringData( 
   ub4 offset, 
   ub4 count) 
throw (DOMException);

Parameter	Description
offset	offset
count	number of characters to extract

Returns

(oratext *) specified substring