Class NodeImpl

java.lang.Object

com.icl.saxon.om.AbstractNode

com.icl.saxon.tree.NodeImpl

All Implemented Interfaces:

NodeInfo, DOMLocator, Source, SourceLocator, Node

Direct Known Subclasses:

AttributeImpl, CommentImpl, NamespaceImpl, ParentNodeImpl, ProcInstImpl, TextImpl

public abstract class NodeImpl
extends AbstractNode

A node in the XML parse tree representing an XML element, character content, or attribute.

This is the top-level class in the implementation class hierarchy; it essentially contains all those methods that can be defined using other primitive methods, without direct access to data.

Author:

Michael H. Kay

Field Summary

Fields

Modifier and Type	Field	Description
protected static NodeInfo[]	emptyArray
protected int	index
protected ParentNodeImpl	parent

Fields inherited from class AbstractNode

NODE_LETTER

Fields inherited from interface Node

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

Fields inherited from interface NodeInfo

ATTRIBUTE, COMMENT, ELEMENT, NAMESPACE, NODE, NONE, NUMBER_OF_TYPES, PI, ROOT, TEXT

Constructor Summary

Constructors

Constructor	Description
NodeImpl()

Method Summary

Modifier and Type	Method	Description
final int	compareOrder(NodeInfo other)	Determine the relative position of this node and another node, in document order.
String	generateId()	Get a character string that uniquely identifies this node within this document (The calling code will prepend a document identifier)
NamedNodeMap	getAttributes()	Return a NamedNodeMap containing the attributes of this node (if it is an Element ) or null otherwise.
String	getAttributeValue(int fingerprint)	Get the value of a given attribute of this node
String	getAttributeValue(String uri, String localName)	Find the value of a given attribute of this node.
String	getBaseURI()	Get the base URI for the node.
NodeList	getChildNodes()	Return a NodeList that contains all children of this node.
String	getDisplayName()	Get the display name of this node.
Element	getDocumentElement()	Get the outermost element.
DocumentInfo	getDocumentRoot()	Get the root (document) node
AxisEnumeration	getEnumeration(byte axisNumber, NodeTest nodeTest)	Return an enumeration over the nodes reached by the given axis from this node
int	getFingerprint()	Get the fingerprint of the node.
Node	getFirstChild()	Get first child - default implementation used for leaf nodes
Node	getLastChild()	Get last child - default implementation used for leaf nodes
int	getLineNumber()	Get the line number of the node within its source document entity
String	getLocalName()	Get the local name of this node.
int	getNameCode()	Get the nameCode of the node.
NamePool	getNamePool()	Get the NamePool
NodeImpl	getNextInDocument(NodeImpl anchor)	Get the next node in document order
Node	getNextSibling()	Get next sibling node
Node	getOriginatingNode()	Get the node corresponding to this javax.xml.transform.dom.DOMLocator
final NodeInfo	getParent()	Find the parent node of this node.
String	getPrefix()	Get the prefix part of the name of this node.
NodeImpl	getPreviousInDocument()	Get the previous node in document order
Node	getPreviousSibling()	Get the previous sibling of the node
protected long	getSequenceNumber()	Get the node sequence number (in document order).
String	getSystemId()	Get the system ID for the node.
String	getURI()	Get the URI part of the name of this node.
boolean	hasAttributes()	Returns whether this node (if it is an element) has any attributes.
boolean	hasChildNodes()	Determine whether the node has any children.
boolean	isSameNodeInfo(NodeInfo other)	Determine whether this is the same node as another node
void	outputNamespaceNodes(Outputter out, boolean includeAncestors)	Output all namespace nodes associated with this element.
void	removeNode()	Remove this node from the tree.
void	setSystemId(String uri)	Set the system ID of this node.

Methods inherited from class AbstractNode

appendChild, appendData, cloneNode, compareDocumentPosition, copyStringValue, createAttribute, createAttributeNS, createCDATASection, createComment, createDocumentFragment, createElement, createElementNS, createEntityReference, createProcessingInstruction, createTextNode, deleteData, disallowUpdate, getAttribute, getAttributeNode, getAttributeNodeNS, getAttributeNS, getColumnNumber, getData, getDoctype, getElementById, getElementsByTagName, getElementsByTagNameNS, getFeature, getImplementation, getLength, getName, getNamespaceURI, getNodeName, getNodeValue, getOwnerDocument, getOwnerElement, getParentNode, getPublicId, getSchemaTypeInfo, getSpecified, getTagName, getTextContent, getUserData, getValue, getWholeText, hasAttribute, hasAttributeNS, importNode, insertBefore, insertData, isDefaultNamespace, isElementContentWhitespace, isEqualNode, isId, isSameNode, isSupported, lookupNamespaceURI, lookupPrefix, normalize, removeAttribute, removeAttributeNode, removeAttributeNS, removeChild, replaceChild, replaceData, replaceWholeText, setAttributeNode, setAttributeNodeNS, setAttributeNS, setData, setIdAttribute, setIdAttributeNode, setIdAttributeNS, setNodeValue, setPrefix, setTextContent, setUserData, setValue, splitText, substringData, supports

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface Node

getNodeType

Methods inherited from interface NodeInfo

copy, getNodeType, getStringValue

Methods inherited from interface Source

isEmpty

Field Details

emptyArray

protected static NodeInfo[] emptyArray

parent

protected ParentNodeImpl parent

index

protected int index

Constructor Details

NodeImpl

public NodeImpl()

Method Details

setSystemId

public void setSystemId(String uri)

Set the system ID of this node. This method is provided so that a NodeInfo implements the javax.xml.transform.Source interface, allowing a node to be used directly as the Source of a transformation

isSameNodeInfo

public boolean isSameNodeInfo(NodeInfo other)

Determine whether this is the same node as another node

Specified by:

isSameNodeInfo in interface NodeInfo

Specified by:

isSameNodeInfo in class AbstractNode

Returns:

true if this Node object and the supplied Node object represent the same node in the tree.

getNameCode

public int getNameCode()

Get the nameCode of the node. This is used to locate the name in the NamePool

Specified by:

getNameCode in interface NodeInfo

Specified by:

getNameCode in class AbstractNode

See Also:

• allocate
• getFingerprint

getFingerprint

public int getFingerprint()

Get the fingerprint of the node. This is used to compare whether two nodes have equivalent names. Return -1 for a node with no name.

Specified by:

getFingerprint in interface NodeInfo

Specified by:

getFingerprint in class AbstractNode

generateId

public String generateId()

Get a character string that uniquely identifies this node within this document (The calling code will prepend a document identifier)

Specified by:

generateId in interface NodeInfo

Specified by:

generateId in class AbstractNode

Returns:

a string.

getOriginatingNode

public Node getOriginatingNode()

Get the node corresponding to this javax.xml.transform.dom.DOMLocator

Specified by:

getOriginatingNode in interface DOMLocator

Overrides:

getOriginatingNode in class AbstractNode

getSystemId

public String getSystemId()

Get the system ID for the node. Default implementation for child nodes.

Specified by:

getSystemId in interface NodeInfo

Specified by:

getSystemId in interface Source

Specified by:

getSystemId in interface SourceLocator

Specified by:

getSystemId in class AbstractNode

Returns:

the System Identifier of the entity in the source document containing the node, or null if not known. Note this is not the same as the base URI: the base URI can be modified by xml:base, but the system ID cannot.

getBaseURI

public String getBaseURI()

Get the base URI for the node. Default implementation for child nodes.

Specified by:

getBaseURI in interface Node

Specified by:

getBaseURI in interface NodeInfo

Specified by:

getBaseURI in class AbstractNode

getSequenceNumber

protected long getSequenceNumber()

Get the node sequence number (in document order). Sequence numbers are monotonic but not consecutive. In the current implementation, parent nodes (elements and roots) have a zero least-significant word, while namespaces, attributes, text nodes, comments, and PIs have the top word the same as their owner and the bottom half reflecting their relative position. This is the default implementation for child nodes.

compareOrder

public final int compareOrder(NodeInfo other)

Determine the relative position of this node and another node, in document order. The other node will always be in the same document.

Specified by:

compareOrder in interface NodeInfo

Specified by:

compareOrder in class AbstractNode

Parameters:

other - The other node, whose position is to be compared with this node

Returns:

-1 if this node precedes the other node, +1 if it follows the other node, or 0 if they are the same node. (In this case, isSameNode() will always return true, and the two nodes will produce the same result for generateId())

getNamePool

public NamePool getNamePool()

Get the NamePool

getPrefix

public String getPrefix()

Get the prefix part of the name of this node. This is the name before the ":" if any.

Specified by:

getPrefix in interface Node

Specified by:

getPrefix in interface NodeInfo

Specified by:

getPrefix in class AbstractNode

Returns:

the prefix part of the name. For an unnamed node, return an empty string.

getURI

public String getURI()

Get the URI part of the name of this node. This is the URI corresponding to the prefix, or the URI of the default namespace if appropriate.

Specified by:

getURI in interface NodeInfo

Specified by:

getURI in class AbstractNode

Returns:

The URI of the namespace of this node. For the default namespace, return an empty string. For an unnamed node, return null.

getDisplayName

public String getDisplayName()

Get the display name of this node. For elements and attributes this is [prefix:]localname. For unnamed nodes, it is an empty string.

Specified by:

getDisplayName in interface NodeInfo

Overrides:

getDisplayName in class AbstractNode

Returns:

The display name of this node. For a node with no name, return an empty string.

getLocalName

public String getLocalName()

Get the local name of this node.

Specified by:

getLocalName in interface Node

Specified by:

getLocalName in interface NodeInfo

Specified by:

getLocalName in class AbstractNode

Returns:

The local name of this node. For a node with no name, return an empty string.

getLineNumber

public int getLineNumber()

Get the line number of the node within its source document entity

Specified by:

getLineNumber in interface NodeInfo

Specified by:

getLineNumber in interface SourceLocator

Overrides:

getLineNumber in class AbstractNode

Returns:

the line number of the node in its original source document; or -1 if not available

getParent

public final NodeInfo getParent()

Find the parent node of this node.

Specified by:

getParent in interface NodeInfo

Specified by:

getParent in class AbstractNode

Returns:

The Node object describing the containing element or root node.

getPreviousSibling

public Node getPreviousSibling()

Get the previous sibling of the node

Specified by:

getPreviousSibling in interface Node

Overrides:

getPreviousSibling in class AbstractNode

Returns:

The previous sibling node. Returns null if the current node is the first child of its parent.

getNextSibling

public Node getNextSibling()

Get next sibling node

Specified by:

getNextSibling in interface Node

Overrides:

getNextSibling in class AbstractNode

Returns:

The next sibling node of the required type. Returns null if the current node is the last child of its parent.

getFirstChild

public Node getFirstChild()

Get first child - default implementation used for leaf nodes

Specified by:

getFirstChild in interface Node

Overrides:

getFirstChild in class AbstractNode

Returns:

null

getLastChild

public Node getLastChild()

Get last child - default implementation used for leaf nodes

Specified by:

getLastChild in interface Node

Overrides:

getLastChild in class AbstractNode

Returns:

null

getEnumeration

public AxisEnumeration getEnumeration(byte axisNumber,
 NodeTest nodeTest)

Return an enumeration over the nodes reached by the given axis from this node

Specified by:

getEnumeration in interface NodeInfo

Specified by:

getEnumeration in class AbstractNode

Parameters:

axisNumber - The axis to be used (a constant in class Axis)

nodeTest - A pattern to be matched by the returned nodes

node - NodeInfo representing the node from which the enumeration starts

nodeType - the type(s) of node to be included, e.g. NodeInfo.ELEMENT, NodeInfo.TEXT. The value NodeInfo.NODE means include any type of node.

Returns:

an AxisEnumeration that scans the nodes reached by the axis in turn.

hasAttributes

public boolean hasAttributes()

Returns whether this node (if it is an element) has any attributes.

Specified by:

hasAttributes in interface Node

Specified by:

hasAttributes in class AbstractNode

Returns:

true if this node has any attributes, false otherwise.

Since:

DOM Level 2

getAttributeValue

public String getAttributeValue(String uri,
 String localName)

Find the value of a given attribute of this node.
This method is defined on all nodes to meet XSL requirements, but for nodes other than elements it will always return null.

Specified by:

getAttributeValue in interface NodeInfo

Specified by:

getAttributeValue in class AbstractNode

Parameters:

uri - the namespace uri of an attribute

localName - the local name of an attribute

Returns:

the value of the attribute, if it exists, otherwise null

getAttributeValue

public String getAttributeValue(int fingerprint)

Get the value of a given attribute of this node

Specified by:

getAttributeValue in interface NodeInfo

Specified by:

getAttributeValue in class AbstractNode

Parameters:

fingerprint - The fingerprint of the attribute name

Returns:

the attribute value if it exists or null if not

getDocumentElement

public Element getDocumentElement()

Get the outermost element.

Overrides:

getDocumentElement in class AbstractNode

Returns:

the Element node for the outermost element of the document. If the document is not well-formed, this returns the last element child of the root if there is one, otherwise null.

getDocumentRoot

public DocumentInfo getDocumentRoot()

Get the root (document) node

Specified by:

getDocumentRoot in interface NodeInfo

Overrides:

getDocumentRoot in class AbstractNode

Returns:

the DocumentInfo representing the containing document

getNextInDocument

public NodeImpl getNextInDocument(NodeImpl anchor)

Get the next node in document order

Parameters:

anchor - : the scan stops when it reaches a node that is not a descendant of the specified anchor node

Returns:

the next node in the document, or null if there is no such node

getPreviousInDocument

public NodeImpl getPreviousInDocument()

Get the previous node in document order

Returns:

the previous node in the document, or null if there is no such node

outputNamespaceNodes

public void outputNamespaceNodes(Outputter out,
 boolean includeAncestors)
                          throws TransformerException

Output all namespace nodes associated with this element. Does nothing if the node is not an element.

Specified by:

outputNamespaceNodes in interface NodeInfo

Overrides:

outputNamespaceNodes in class AbstractNode

Parameters:

out - The relevant outputter

includeAncestors - True if namespaces declared on ancestor elements must be output; false if it is known that these are already on the result tree

Throws:

TransformerException

removeNode

public void removeNode()

Remove this node from the tree. For system use only. When one or more nodes have been removed, renumberChildren() must be called to adjust the numbering of remaining nodes. PRECONDITION: The node must have a parent node.

getChildNodes

public NodeList getChildNodes()

Return a NodeList that contains all children of this node. If there are no children, this is a NodeList containing no nodes.

Specified by:

getChildNodes in interface Node

Overrides:

getChildNodes in class AbstractNode

getAttributes

public NamedNodeMap getAttributes()

Return a NamedNodeMap containing the attributes of this node (if it is an Element ) or null otherwise. (DOM method)

Specified by:

getAttributes in interface Node

Overrides:

getAttributes in class AbstractNode

hasChildNodes

public boolean hasChildNodes()

Determine whether the node has any children.

Specified by:

hasChildNodes in interface Node

Specified by:

hasChildNodes in interface NodeInfo

Specified by:

hasChildNodes in class AbstractNode

Returns:

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