org.w3c.dom
Interface Document
- Node
- HTMLDocument
public interface Document
The
Document
interface represents the entire HTML or XML
document. Conceptually, it is the root of the document tree, and provides
the primary access to the document's data.
Since elements, text nodes, comments, processing instructions, etc.
cannot exist outside the context of a
Document
, the
Document
interface also contains the factory methods needed
to create these objects. The
Node
objects created have a
ownerDocument
attribute which associates them with the
Document
within whose context they were created.
See also the
Document Object Model (DOM) Level 2 Core Specification.
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 |
appendChild , cloneNode , getAttributes , getChildNodes , getFirstChild , getLastChild , getLocalName , getNamespaceURI , getNextSibling , getNodeName , getNodeType , getNodeValue , getOwnerDocument , getParentNode , getPrefix , getPreviousSibling , hasAttributes , hasChildNodes , insertBefore , isSupported , normalize , removeChild , replaceChild , setNodeValue , setPrefix |
createAttribute
public Attr createAttribute(String name)
throws DOMException
Creates an Attr
of the given name. Note that the
Attr
instance can then be set on an Element
using the setAttributeNode
method.
To create an attribute with a qualified name and namespace URI, use
the createAttributeNS
method.
name
- The name of the attribute.
- A new
Attr
object with the nodeName
attribute set to name
, and localName
,
prefix
, and namespaceURI
set to
null
. The value of the attribute is the empty string.
DOMException
- INVALID_CHARACTER_ERR: Raised if the specified name contains an
illegal character.
createAttributeNS
public Attr createAttributeNS(String namespaceURI,
String qualifiedName)
throws DOMException
Creates an attribute of the given qualified name and namespace URI.
HTML-only DOM implementations do not need to implement this method.
namespaceURI
- The namespace URI of the attribute to create.qualifiedName
- The qualified name of the attribute to instantiate.
- A new
Attr
object with the following attributes:
AttributeValueNode.nodeName
qualifiedName
Node.namespaceURI
namespaceURI
Node.prefix
prefix, extracted from
qualifiedName
, or null
if there is no
prefixNode.localName
local name, extracted from
qualifiedName
Attr.name
qualifiedName
Node.nodeValue
the empty
string
DOMException
- INVALID_CHARACTER_ERR: Raised if the specified qualified name
contains an illegal character.
NAMESPACE_ERR: Raised if the qualifiedName
is
malformed, if the qualifiedName
has a prefix and the
namespaceURI
is null
, if the
qualifiedName
has a prefix that is "xml" and the
namespaceURI
is different from "
http://www.w3.org/XML/1998/namespace", or if the
qualifiedName
is "xmlns" and the
namespaceURI
is different from "
http://www.w3.org/2000/xmlns/".
createCDATASection
public CDATASection createCDATASection(String data)
throws DOMException
Creates a CDATASection
node whose value is the specified
string.
data
- The data for the CDATASection
contents.
- The new
CDATASection
object.
DOMException
- NOT_SUPPORTED_ERR: Raised if this document is an HTML document.
createComment
public Comment createComment(String data)
Creates a Comment
node given the specified string.
data
- The data for the node.
createDocumentFragment
public DocumentFragment createDocumentFragment()
Creates an empty DocumentFragment
object.
createElement
public Element createElement(String tagName)
throws DOMException
Creates an element of the type specified. Note that the instance
returned implements the Element
interface, so attributes
can be specified directly on the returned object.
In addition, if there are known attributes with default values,
Attr
nodes representing them are automatically created
and attached to the element.
To create an element with a qualified name and namespace URI, use
the createElementNS
method.
tagName
- The name of the element type to instantiate. For XML,
this is case-sensitive. For HTML, the tagName
parameter may be provided in any case, but it must be mapped to the
canonical uppercase form by the DOM implementation.
- A new
Element
object with the
nodeName
attribute set to tagName
, and
localName
, prefix
, and
namespaceURI
set to null
.
DOMException
- INVALID_CHARACTER_ERR: Raised if the specified name contains an
illegal character.
createElementNS
public Element createElementNS(String namespaceURI,
String qualifiedName)
throws DOMException
Creates an element of the given qualified name and namespace URI.
HTML-only DOM implementations do not need to implement this method.
namespaceURI
- The namespace URI of the element to create.qualifiedName
- The qualified name of the element type to
instantiate.
- A new
Element
object with the following
attributes:AttributeValueNode.nodeName
qualifiedName
Node.namespaceURI
namespaceURI
Node.prefix
prefix, extracted
from qualifiedName
, or null
if there is
no prefixNode.localName
local name, extracted from
qualifiedName
Element.tagName
qualifiedName
DOMException
- INVALID_CHARACTER_ERR: Raised if the specified qualified name
contains an illegal character.
NAMESPACE_ERR: Raised if the qualifiedName
is
malformed, if the qualifiedName
has a prefix and the
namespaceURI
is null
, or if the
qualifiedName
has a prefix that is "xml" and the
namespaceURI
is different from "
http://www.w3.org/XML/1998/namespace" .
createEntityReference
public EntityReference createEntityReference(String name)
throws DOMException
Creates an EntityReference
object. In addition, if the
referenced entity is known, the child list of the
EntityReference
node is made the same as that of the
corresponding Entity
node.If any descendant of the
Entity
node has an unbound namespace prefix, the
corresponding descendant of the created EntityReference
node is also unbound; (its namespaceURI
is
null
). The DOM Level 2 does not support any mechanism to
resolve namespace prefixes.
name
- The name of the entity to reference.
- The new
EntityReference
object.
DOMException
- INVALID_CHARACTER_ERR: Raised if the specified name contains an
illegal character.
NOT_SUPPORTED_ERR: Raised if this document is an HTML document.
createProcessingInstruction
public ProcessingInstruction createProcessingInstruction(String target,
String data)
throws DOMException
Creates a ProcessingInstruction
node given the specified
name and data strings.
target
- The target part of the processing instruction.data
- The data for the node.
- The new
ProcessingInstruction
object.
DOMException
- INVALID_CHARACTER_ERR: Raised if the specified target contains an
illegal character.
NOT_SUPPORTED_ERR: Raised if this document is an HTML document.
createTextNode
public Text createTextNode(String data)
Creates a Text
node given the specified string.
data
- The data for the node.
getDoctype
public DocumentType getDoctype()
The Document Type Declaration (see DocumentType
)
associated with this document. For HTML documents as well as XML
documents without a document type declaration this returns
null
. The DOM Level 2 does not support editing the
Document Type Declaration. docType
cannot be altered in
any way, including through the use of methods inherited from the
Node
interface, such as insertNode
or
removeNode
.
getDocumentElement
public Element getDocumentElement()
This is a convenience attribute that allows direct access to the child
node that is the root element of the document. For HTML documents,
this is the element with the tagName "HTML".
getElementById
public Element getElementById(String elementId)
Returns the Element
whose ID
is given by
elementId
. If no such element exists, returns
null
. Behavior is not defined if more than one element
has this ID
. The DOM implementation must have
information that says which attributes are of type ID. Attributes
with the name "ID" are not of type ID unless so defined.
Implementations that do not know whether attributes are of type ID or
not are expected to return null
.
elementId
- The unique id
value for an element.
getElementsByTagName
public NodeList getElementsByTagName(String tagname)
Returns a NodeList
of all the Elements
with a
given tag name in the order in which they are encountered in a
preorder traversal of the Document
tree.
tagname
- The name of the tag to match on. The special value "*"
matches all tags.
- A new
NodeList
object containing all the matched
Elements
.
getElementsByTagNameNS
public NodeList getElementsByTagNameNS(String namespaceURI,
String localName)
Returns a NodeList
of all the Elements
with a
given local name and namespace URI in the order in which they are
encountered in a preorder traversal of the Document
tree.
namespaceURI
- The namespace URI of the elements to match on. The
special value "*" matches all namespaces.localName
- The local name of the elements to match on. The
special value "*" matches all local names.
- A new
NodeList
object containing all the matched
Elements
.
getImplementation
public DOMImplementation getImplementation()
The DOMImplementation
object that handles this document. A
DOM application may use objects from multiple implementations.
importNode
public Node importNode(Node importedNode,
boolean deep)
throws DOMException
Imports a node from another document to this document. The returned
node has no parent; (
parentNode
is
null
).
The source node is not altered or removed from the original document;
this method creates a new copy of the source node.
For all nodes, importing a node creates a node object owned by the
importing document, with attribute values identical to the source
node's
nodeName
and
nodeType
, plus the
attributes related to namespaces (
prefix
,
localName
, and
namespaceURI
). As in the
cloneNode
operation on a
Node
, the source
node is not altered.
Additional information is copied as appropriate to the
nodeType
, attempting to mirror the behavior expected if
a fragment of XML or HTML source was copied from one document to
another, recognizing that the two documents may have different DTDs
in the XML case. The following list describes the specifics for each
type of node.
ownerElement
null
specified
true
Attr
Attr
deep
Attr
deep
true
DocumentFragment
Document
DocumentType
Attr
Element
importNode
deep
true
Entity
DocumentType
DocumentType
publicId
systemId
notationName
deep
Entity
EntityReference
deep
Notation
DocumentType
DocumentType
publicId
systemId
deep
Notation
target
data
CharacterData
data
length
importedNode
- The node to import.deep
- If true
, recursively import the subtree under
the specified node; if false
, import only the node
itself, as explained above. This has no effect on Attr
, EntityReference
, and Notation
nodes.
- The imported node that belongs to this
Document
.
DOMException
- NOT_SUPPORTED_ERR: Raised if the type of node being imported is not
supported.