|
|||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | ||||||||
The Attr interface represents an attribute in an
Element object.Typically the allowable values for the
attribute are defined in a documenttype definition.
Attr objects inherit the Node interface, but
since they are not actually child nodes of the element they describe, the
DOM does not consider them part of the document tree. Thus, the
Node attributes parentNode,
previousSibling, and nextSibling have a null
value for Attr objects. The DOM takes the view that
attributes are properties of elements rather than having a separate
identity from the elements they are associated with; this should make it
more efficient to implement such features as default attributes associated
with all elements of a given type. Furthermore, Attr nodes
may not be immediate children of a DocumentFragment. However,
they can be associated with Element nodes contained within a
DocumentFragment. In short, users and implementors of the DOM
need to be aware that Attr nodes have some things in common
with other objects inheriting the Node interface, but they
also are quite distinct.
The attribute's effective value is determined as follows: if this
attribute has been explicitly assigned any value, that value is the
attribute's effective value; otherwise, if there is a declaration for
this attribute, and that declaration includes a default value, then that
default value is the attribute's effective value; otherwise, the
attribute does not exist on this element in the structure model until it
has been explicitly added. Note that the nodeValue
attribute on the Attr instance can also be used to retrieve
the string version of the attribute's value(s).
In XML, where the value of an attribute can contain entity references,
the child nodes of the Attr node provide a representation in
which entity references are not expanded. These child nodes may be either
Text or EntityReference nodes. Because the
attribute type may be unknown, there are no tokenized attribute values.
| Fields inherited from class org.w3c.dom.Node |
ATTRIBUTE_NODE,
CDATA_SECTION_NODE,
COMMENT_NODE,
DOCUMENT_FRAGMENT_NODE,
DOCUMENT_NODE,
DOCUMENT_TYPE_NODE,
ELEMENT_NODE,
ENTITY_NODE,
ENTITY_REFERENCE_NODE,
NOTATION_NODE,
PROCESSING_INSTRUCTION_NODE,
TEXT_NODE |
| Method Summary | |
java.lang.String |
getName()
Returns the name of this attribute. |
boolean |
getSpecified()
If this attribute was explicitly given a value in the original document, this is true; otherwise, it is false. |
java.lang.String |
getValue()
On retrieval, the value of the attribute is returned as a string. |
void |
setValue(java.lang.String value)
|
| Methods inherited from interface org.w3c.dom.Node |
appendChild,
cloneNode,
getAttributes,
getChildNodes,
getFirstChild,
getLastChild,
getNextSibling,
getNodeName,
getNodeType,
getNodeValue,
getOwnerDocument,
getParentNode,
getPreviousSibling,
hasChildNodes,
insertBefore,
removeChild,
replaceChild,
setNodeValue |
| Method Detail |
public java.lang.String getName()
public boolean getSpecified()
true; otherwise, it is false. Note
that the implementation is in charge of this attribute, not the user. If
the user changes the value of the attribute (even if it ends up having
the same value as the default value) then the specified
flag is automatically flipped to true. To re-specify the
attribute as the default value from the DTD, the user must delete the
attribute. The implementation will then make a new attribute available
with specified set to false and the default
value (if one exists).
specified is true, and the value is the
assigned value. If the attribute has no assigned value in the document
and has a default value in the DTD, then specified is
false, and the value is the default value in the DTD. If
the attribute has no assigned value in the document and has a value of
#IMPLIED in the DTD, then the attribute does not appear in the
structure model of the document.public java.lang.String getValue()
Text node with the unparsed
contents of the string.public void setValue(java.lang.String value)
|
|||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | ||||||||