org.w3c.dom
Interface Node

All Known Subinterfaces:

Attr, CDATASection, CharacterData, Comment, Document, DocumentFragment, DocumentType, Element, Entity, EntityReference, Notation, ProcessingInstruction, Text

All Known Implementing Classes:

NodeImpl

public abstract interface Node

The Node interface is the primary datatype for the entire Document Object Model. It represents a single node in the document tree. While all objects implementing the Node interface expose methods for dealing with children, not all objects implementing the Node interface may have children. For example, Text nodes may not have children, and adding children to such nodes results in a DOMException being raised.

The attributes nodeName, nodeValue and attributes are included as a mechanism to get at node information without casting down to the specific derived interface. In cases where there is no obvious mapping of these attributes for a specific nodeType (e.g., nodeValue for an Element or attributes for a Comment), this returns null. Note that the specialized interfaces may contain additional and more convenient mechanisms to get and set the relevant information.

Field Summary

static short	ATTRIBUTE_NODE
static short	CDATA_SECTION_NODE
static short	COMMENT_NODE
static short	DOCUMENT_FRAGMENT_NODE
static short	DOCUMENT_NODE
static short	DOCUMENT_TYPE_NODE
static short	ELEMENT_NODE
static short	ENTITY_NODE
static short	ENTITY_REFERENCE_NODE
static short	NOTATION_NODE
static short	PROCESSING_INSTRUCTION_NODE
static short	TEXT_NODE

Method Summary

Node	appendChild(Node newChild) Adds the node newChild to the end of the list of children of this node.
Node	cloneNode(boolean deep) Returns a duplicate of this node, i.e., serves as a generic copy constructor for nodes.
NamedNodeMap	getAttributes() A NamedNodeMap containing the attributes of this node (if it is an Element) or null otherwise.
NodeList	getChildNodes() A NodeList that contains all children of this node.
Node	getFirstChild() The first child of this node.
Node	getLastChild() The last child of this node.
Node	getNextSibling() The node immediately following this node.
java.lang.String	getNodeName() The name of this node, depending on its type; see the table above.
short	getNodeType() A code representing the type of the underlying object, as defined above.
java.lang.String	getNodeValue() The value of this node, depending on its type; see the table above.
Document	getOwnerDocument() The Document object associated with this node.
Node	getParentNode() The parent of this node.
Node	getPreviousSibling() The node immediately preceding this node.
boolean	hasChildNodes() This is a convenience method to allow easy determination of whether a node has any children.
Node	insertBefore(Node newChild, Node refChild) Inserts the node newChild before the existing child node refChild.
Node	removeChild(Node oldChild) Removes the child node indicated by oldChild from the list of children, and returns it.
Node	replaceChild(Node newChild, Node oldChild) Replaces the child node oldChild with newChild in the list of children, and returns the oldChild node.
void	setNodeValue(java.lang.String nodeValue)

Field Detail

ELEMENT_NODE

public static final short ELEMENT_NODE

ATTRIBUTE_NODE

public static final short ATTRIBUTE_NODE

TEXT_NODE

public static final short TEXT_NODE

CDATA_SECTION_NODE

public static final short CDATA_SECTION_NODE

ENTITY_REFERENCE_NODE

public static final short ENTITY_REFERENCE_NODE

ENTITY_NODE

public static final short ENTITY_NODE

PROCESSING_INSTRUCTION_NODE

public static final short PROCESSING_INSTRUCTION_NODE

COMMENT_NODE

public static final short COMMENT_NODE

DOCUMENT_NODE

public static final short DOCUMENT_NODE

DOCUMENT_TYPE_NODE

public static final short DOCUMENT_TYPE_NODE

DOCUMENT_FRAGMENT_NODE

public static final short DOCUMENT_FRAGMENT_NODE

NOTATION_NODE

public static final short NOTATION_NODE

Method Detail

getNodeName

public java.lang.String getNodeName()

The name of this node, depending on its type; see the table above.

getNodeValue

public java.lang.String getNodeValue()
                              throws DOMException

The value of this node, depending on its type; see the table above.

Throws:

DOMException - NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly.

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

setNodeValue

public void setNodeValue(java.lang.String nodeValue)
                  throws DOMException

getNodeType

public short getNodeType()

A code representing the type of the underlying object, as defined above.

getParentNode

public Node getParentNode()

The parent of this node. All nodes, except Document, DocumentFragment, and Attr may have a parent. However, if a node has just been created and not yet added to the tree, or if it has been removed from the tree, this is null.

getChildNodes

public NodeList getChildNodes()

A NodeList that contains all children of this node. If there are no children, this is a NodeList containing no nodes. The content of the returned NodeList is "live" in the sense that, for instance, changes to the children of the node object that it was created from are immediately reflected in the nodes returned by the NodeList accessors; it is not a static snapshot of the content of the node. This is true for every NodeList, including the ones returned by the getElementsByTagName method.

getFirstChild

public Node getFirstChild()

The first child of this node. If there is no such node, this returns null.

getLastChild

public Node getLastChild()

The last child of this node. If there is no such node, this returns null.

getPreviousSibling

public Node getPreviousSibling()

The node immediately preceding this node. If there is no such node, this returns null.

getNextSibling

public Node getNextSibling()

The node immediately following this node. If there is no such node, this returns null.

getAttributes

public NamedNodeMap getAttributes()

A NamedNodeMap containing the attributes of this node (if it is an Element) or null otherwise.

getOwnerDocument

public Document getOwnerDocument()

The Document object associated with this node. This is also the Document object used to create new nodes. When this node is a Document this is null.

insertBefore

public Node insertBefore(Node newChild,
                         Node refChild)
                  throws DOMException

Inserts the node newChild before the existing child node refChild. If refChild is null, insert newChild at the end of the list of children.
If newChild is a DocumentFragment object, all of its children are inserted, in the same order, before refChild. If the newChild is already in the tree, it is first removed.

Parameters:

newChild - The node to insert.

refChild - The reference node, i.e., the node before which the new node must be inserted.

Returns:

The node being inserted.

Throws:

DOMException - HIERARCHY_REQUEST_ERR: Raised if this node is of a type that does not allow children of the type of the newChild node, or if the node to insert is one of this node's ancestors.
WRONG_DOCUMENT_ERR: Raised if newChild was created from a different document than the one that created this node.
NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
NOT_FOUND_ERR: Raised if refChild is not a child of this node.

replaceChild

public Node replaceChild(Node newChild,
                         Node oldChild)
                  throws DOMException

Replaces the child node oldChild with newChild in the list of children, and returns the oldChild node. If the newChild is already in the tree, it is first removed.

Parameters:

newChild - The new node to put in the child list.

oldChild - The node being replaced in the list.

Returns:

The node replaced.

Throws:

DOMException - HIERARCHY_REQUEST_ERR: Raised if this node is of a type that does not allow children of the type of the newChild node, or it the node to put in is one of this node's ancestors.
WRONG_DOCUMENT_ERR: Raised if newChild was created from a different document than the one that created this node.
NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
NOT_FOUND_ERR: Raised if oldChild is not a child of this node.

removeChild

public Node removeChild(Node oldChild)
                 throws DOMException

Removes the child node indicated by oldChild from the list of children, and returns it.

Parameters:

oldChild - The node being removed.

Returns:

The node removed.

Throws:

DOMException - NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
NOT_FOUND_ERR: Raised if oldChild is not a child of this node.

appendChild

public Node appendChild(Node newChild)
                 throws DOMException

Adds the node newChild to the end of the list of children of this node. If the newChild is already in the tree, it is first removed.

Parameters:

newChild - The node to add.If it is a DocumentFragment object, the entire contents of the document fragment are moved into the child list of this node

Returns:

The node added.

Throws:

DOMException - HIERARCHY_REQUEST_ERR: Raised if this node is of a type that does not allow children of the type of the newChild node, or if the node to append is one of this node's ancestors.
WRONG_DOCUMENT_ERR: Raised if newChild was created from a different document than the one that created this node.
NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.

hasChildNodes

public boolean hasChildNodes()

This is a convenience method to allow easy determination of whether a node has any children.

Returns:

true if the node has any children, false if the node has no children.

cloneNode

public Node cloneNode(boolean deep)

Returns a duplicate of this node, i.e., serves as a generic copy constructor for nodes. The duplicate node has no parent ( parentNode returns null.).
Cloning an Element copies all attributes and their values, including those generated by the XML processor to represent defaulted attributes, but this method does not copy any text it contains unless it is a deep clone, since the text is contained in a child Text node. Cloning any other type of node simply returns a copy of this node.

Parameters:

deep - If true, recursively clone the subtree under the specified node; if false, clone only the node itself (and its attributes, if it is an Element).

Returns:

The duplicate node.