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CharacterData

public interface CharacterData
implements Node

org.w3c.dom.CharacterData
Known Indirect Subclasses


The CharacterData interface extends Node with a set of attributes and methods for accessing character data in the DOM. For clarity this set is defined here rather than on each object that uses these attributes and methods. No DOM objects correspond directly to CharacterData, though Text and others do inherit the interface from it. All offsets in this interface start from 0.

As explained in the DOMString interface, text strings in the DOM are represented in UTF-16, i.e. as a sequence of 16-bit units. In the following, the term 16-bit units is used whenever necessary to indicate that indexing on CharacterData is done in 16-bit units.

See also the Document Object Model (DOM) Level 3 Core Specification.

Summary

Inherited constants

From interface org.w3c.dom.Node

Public methods

abstract void appendData(String arg)

Append the string to the end of the character data of the node.

abstract void deleteData(int offset, int count)

Remove a range of 16-bit units from the node.

abstract String getData()

The character data of the node that implements this interface.

abstract int getLength()

The number of 16-bit units that are available through data and the substringData method below.

abstract void insertData(int offset, String arg)

Insert a string at the specified 16-bit unit offset.

abstract void replaceData(int offset, int count, String arg)

Replace the characters starting at the specified 16-bit unit offset with the specified string.

abstract void setData(String data)

The character data of the node that implements this interface.

abstract String substringData(int offset, int count)

Extracts a range of data from the node.

Inherited methods

From interface org.w3c.dom.Node

Public methods

appendData

Added in API level 1
void appendData (String arg)

Append the string to the end of the character data of the node. Upon success, data provides access to the concatenation of data and the DOMString specified.

Parameters
arg String: The DOMString to append.
Throws
DOMException NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.

deleteData

Added in API level 1
void deleteData (int offset, 
                int count)

Remove a range of 16-bit units from the node. Upon success, data and length reflect the change.

Parameters
offset int: The offset from which to start removing.
count int: The number of 16-bit units to delete. If the sum of offset and count exceeds length then all 16-bit units from offset to the end of the data are deleted.
Throws
DOMException INDEX_SIZE_ERR: Raised if the specified offset is negative or greater than the number of 16-bit units in data, or if the specified count is negative.
NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.

getData

Added in API level 1
String getData ()

The character data of the node that implements this interface. The DOM implementation may not put arbitrary limits on the amount of data that may be stored in a CharacterData node. However, implementation limits may mean that the entirety of a node's data may not fit into a single DOMString. In such cases, the user may call substringData to retrieve the data in appropriately sized pieces.

Returns
String
Throws
DOMException DOMSTRING_SIZE_ERR: Raised when it would return more characters than fit in a DOMString variable on the implementation platform.

getLength

Added in API level 1
int getLength ()

The number of 16-bit units that are available through data and the substringData method below. This may have the value zero, i.e., CharacterData nodes may be empty.

Returns
int

insertData

Added in API level 1
void insertData (int offset, 
                String arg)

Insert a string at the specified 16-bit unit offset.

Parameters
offset int: The character offset at which to insert.
arg String: The DOMString to insert.
Throws
DOMException INDEX_SIZE_ERR: Raised if the specified offset is negative or greater than the number of 16-bit units in data.
NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.

replaceData

Added in API level 1
void replaceData (int offset, 
                int count, 
                String arg)

Replace the characters starting at the specified 16-bit unit offset with the specified string.

Parameters
offset int: The offset from which to start replacing.
count int: The number of 16-bit units to replace. If the sum of offset and count exceeds length, then all 16-bit units to the end of the data are replaced; (i.e., the effect is the same as a remove method call with the same range, followed by an append method invocation).
arg String: The DOMString with which the range must be replaced.
Throws
DOMException INDEX_SIZE_ERR: Raised if the specified offset is negative or greater than the number of 16-bit units in data, or if the specified count is negative.
NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.

setData

Added in API level 1
void setData (String data)

The character data of the node that implements this interface. The DOM implementation may not put arbitrary limits on the amount of data that may be stored in a CharacterData node. However, implementation limits may mean that the entirety of a node's data may not fit into a single DOMString. In such cases, the user may call substringData to retrieve the data in appropriately sized pieces.

Parameters
data String
Throws
DOMException NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly.

substringData

Added in API level 1
String substringData (int offset, 
                int count)

Extracts a range of data from the node.

Parameters
offset int: Start offset of substring to extract.
count int: The number of 16-bit units to extract.
Returns
String The specified substring. If the sum of offset and count exceeds the length, then all 16-bit units to the end of the data are returned.
Throws
DOMException INDEX_SIZE_ERR: Raised if the specified offset is negative or greater than the number of 16-bit units in data, or if the specified count is negative.
DOMSTRING_SIZE_ERR: Raised if the specified range of text does not fit into a DOMString.
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