Node
public interface DocumentFragment extends Node
DocumentFragment
is a "lightweight" or "minimal"
Document
object. It is very common to want to be able to
extract a portion of a document's tree or to create a new fragment of a
document. Imagine implementing a user command like cut or rearranging a
document by moving fragments around. It is desirable to have an object
which can hold such fragments and it is quite natural to use a Node for
this purpose. While it is true that a Document
object could
fulfill this role, a Document
object can potentially be a
heavyweight object, depending on the underlying implementation. What is
really needed for this is a very lightweight object.
DocumentFragment
is such an object.
Furthermore, various operations -- such as inserting nodes as children
of another Node
-- may take DocumentFragment
objects as arguments; this results in all the child nodes of the
DocumentFragment
being moved to the child list of this node.
The children of a DocumentFragment
node are zero or more
nodes representing the tops of any sub-trees defining the structure of
the document. DocumentFragment
nodes do not need to be
well-formed XML documents (although they do need to follow the rules
imposed upon well-formed XML parsed entities, which can have multiple top
nodes). For example, a DocumentFragment
might have only one
child and that child node could be a Text
node. Such a
structure model represents neither an HTML document nor a well-formed XML
document.
When a DocumentFragment
is inserted into a
Document
(or indeed any other Node
that may
take children) the children of the DocumentFragment
and not
the DocumentFragment
itself are inserted into the
Node
. This makes the DocumentFragment
very
useful when the user wishes to create nodes that are siblings; the
DocumentFragment
acts as the parent of these nodes so that
the user can use the standard methods from the Node
interface, such as Node.insertBefore
and
Node.appendChild
.
See also the Document Object Model (DOM) Level 3 Core Specification.
ATTRIBUTE_NODE, CDATA_SECTION_NODE, COMMENT_NODE, DOCUMENT_FRAGMENT_NODE, DOCUMENT_NODE, DOCUMENT_POSITION_CONTAINED_BY, DOCUMENT_POSITION_CONTAINS, DOCUMENT_POSITION_DISCONNECTED, DOCUMENT_POSITION_FOLLOWING, DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC, DOCUMENT_POSITION_PRECEDING, DOCUMENT_TYPE_NODE, ELEMENT_NODE, ENTITY_NODE, ENTITY_REFERENCE_NODE, NOTATION_NODE, PROCESSING_INSTRUCTION_NODE, TEXT_NODE
appendChild, cloneNode, compareDocumentPosition, getAttributes, getBaseURI, getChildNodes, getFeature, getFirstChild, getLastChild, getLocalName, getNamespaceURI, getNextSibling, getNodeName, getNodeType, getNodeValue, getOwnerDocument, getParentNode, getPrefix, getPreviousSibling, getTextContent, getUserData, hasAttributes, hasChildNodes, insertBefore, isDefaultNamespace, isEqualNode, isSameNode, isSupported, lookupNamespaceURI, lookupPrefix, normalize, removeChild, replaceChild, setNodeValue, setPrefix, setTextContent, setUserData
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For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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DRAFT 9-internal+0-adhoc.mlchung.jdk9-jdeps