org.apache.xerces.dom
Class DocumentFragmentImpl
java.lang.Object
org.apache.xerces.dom.NodeImpl
org.apache.xerces.dom.ChildNode
org.apache.xerces.dom.ParentNode
org.apache.xerces.dom.DocumentFragmentImpl
- All Implemented Interfaces:
- java.lang.Cloneable, org.w3c.dom.DocumentFragment, org.w3c.dom.events.EventTarget, org.w3c.dom.Node, org.w3c.dom.NodeList, java.io.Serializable
- public class DocumentFragmentImpl
- extends ParentNode
- implements org.w3c.dom.DocumentFragment
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 fulfil this role, a Document object can
potentially be a heavyweight object, depending on the underlying
implementation... and in DOM Level 1, nodes aren't allowed to cross
Document boundaries anyway. 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 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 insertBefore()
and appendChild().
- Since:
- PR-DOM-Level-1-19980818.
- Version:
- $Id: DocumentFragmentImpl.java,v 1.14 2004/10/05 17:12:51 mrglavas Exp $
- See Also:
- Serialized Form
INTERNAL:
- Usage of this class is not supported. It may be altered or removed at any time.
Fields inherited from class org.apache.xerces.dom.NodeImpl |
DOCUMENT_POSITION_CONTAINS, DOCUMENT_POSITION_DISCONNECTED, DOCUMENT_POSITION_FOLLOWING, DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC, DOCUMENT_POSITION_IS_CONTAINED, DOCUMENT_POSITION_PRECEDING, ELEMENT_DEFINITION_NODE, FIRSTCHILD, flags, HASSTRING, ID, IGNORABLEWS, NORMALIZED, OWNED, ownerNode, READONLY, SPECIFIED, SYNCCHILDREN, SYNCDATA, TREE_POSITION_ANCESTOR, TREE_POSITION_DESCENDANT, TREE_POSITION_DISCONNECTED, TREE_POSITION_EQUIVALENT, TREE_POSITION_FOLLOWING, TREE_POSITION_PRECEDING, TREE_POSITION_SAME_NODE |
Fields inherited from interface 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 |
getNodeName()
Returns the node name. |
short |
getNodeType()
A short integer indicating what type of node this is. |
void |
normalize()
Override default behavior to call normalize() on this Node's
children. |
Methods inherited from class org.apache.xerces.dom.ParentNode |
cloneNode, getChildNodes, getChildNodesUnoptimized, getFirstChild, getLastChild, getLength, getOwnerDocument, getTextContent, hasChildNodes, insertBefore, isEqualNode, item, removeChild, replaceChild, setReadOnly, setTextContent, synchronizeChildren |
Methods inherited from class org.apache.xerces.dom.NodeImpl |
addEventListener, appendChild, changed, changes, compareDocumentPosition, compareTreePosition, dispatchEvent, getAttributes, getBaseURI, getContainer, getFeature, getLocalName, getNamespaceURI, getNodeNumber, getNodeValue, getPrefix, getReadOnly, getUserData, getUserData, getUserDataRecord, hasAttributes, isDefaultNamespace, isSameNode, isSupported, lookupNamespaceURI, lookupPrefix, needsSyncChildren, removeEventListener, setNodeValue, setPrefix, setUserData, setUserData, synchronizeData, toString |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface org.w3c.dom.Node |
appendChild, cloneNode, getAttributes, getChildNodes, getFirstChild, getLastChild, getLocalName, getNamespaceURI, getNextSibling, getNodeValue, getOwnerDocument, getParentNode, getPrefix, getPreviousSibling, hasAttributes, hasChildNodes, insertBefore, isSupported, removeChild, replaceChild, setNodeValue, setPrefix |
DocumentFragmentImpl
public DocumentFragmentImpl(CoreDocumentImpl ownerDoc)
- Factory constructor.
DocumentFragmentImpl
public DocumentFragmentImpl()
- Constructor for serialization.
getNodeType
public short getNodeType()
- A short integer indicating what type of node this is. The named
constants for this value are defined in the org.w3c.dom.Node interface.
- Specified by:
getNodeType
in interface org.w3c.dom.Node
- Specified by:
getNodeType
in class NodeImpl
getNodeName
public java.lang.String getNodeName()
- Returns the node name.
- Specified by:
getNodeName
in interface org.w3c.dom.Node
- Specified by:
getNodeName
in class NodeImpl
normalize
public void normalize()
- Override default behavior to call normalize() on this Node's
children. It is up to implementors or Node to override normalize()
to take action.
- Specified by:
normalize
in interface org.w3c.dom.Node
- Overrides:
normalize
in class ParentNode
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