org.cdlib.xtf.lazyTree
Class ProxyAttributeImpl

Object
  NodeImpl
      ProxyAttributeImpl

All Implemented Interfaces:

Source, SourceLocator, FingerprintedNode, Item, NodeInfo, ValueRepresentation

 class ProxyAttributeImpl
extends NodeImpl

Represents an attribute node from a persistent XML document. Used by ProxyElement to implement lazy attribute loading.

Author:

Martin Haye

Field Summary

(package private) ProxyElement	element
(package private) int	index

Fields inherited from class NodeImpl

document, nameCode, nextSibNum, NODE_LETTER, nodeNum, parentNum, prevSibNum

Fields inherited from interface NodeInfo

ALL_NAMESPACES, EMPTY_NAMESPACE_LIST, IS_DTD_TYPE, IS_NILLED, LOCAL_NAMESPACES, NO_NAMESPACES

Fields inherited from interface ValueRepresentation

EMPTY_VALUE_ARRAY

Constructor Summary

ProxyAttributeImpl(ProxyElement element, int index)
Construct an Attribute node for the n'th attribute of a given element

Method Summary

void	copy(Receiver out, int whichNamespaces, boolean copyAnnotations, int locationId) Copy this node to a given outputter
void	generateId(FastStringBuffer buffer) Get sequential key.
String	getDisplayName() Obtain the displayable name of this attribute.
DocumentInfo	getDocumentRoot() Get the root (document) node
int	getNameCode() Get the name code, which enables the name to be located in the name pool
NamePool	getNamePool() Get the NamePool for the tree containing this node
NodeInfo	getNextSibling() Get next sibling - not defined for attributes
int	getNodeKind() Return the type of node.
NodeImpl	getPreviousInDocument() Get the previous node in document order (skipping attributes)
NodeInfo	getPreviousSibling() Get previous sibling - not defined for attributes
NodeInfo	getRoot() Get the root node of the tree (not necessarily a document node)
protected long	getSequenceNumber() Get the node sequence number (in document order).
String	getStringValue() Return the character value of the node.
boolean	isSameNodeInfo(NodeInfo other) Determine whether this is the same node as another node

Methods inherited from class NodeImpl

atomize, compareOrder, equals, getAttributeValue, getBaseURI, getColumnNumber, getConfiguration, getDeclaredNamespaces, getDocumentNumber, getFingerprint, getFirstChild, getLastChild, getLineNumber, getLocalPart, getNextInDocument, getParent, getPrefix, getPublicId, getStringValueCS, getSystemId, getTypeAnnotation, getTypedValue, getURI, hasChildNodes, hashCode, init, iterateAxis, iterateAxis, sendNamespaceDeclarations, setSystemId

Methods inherited from class Object

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

Field Detail

element

ProxyElement element

index

int index

Constructor Detail

ProxyAttributeImpl

public ProxyAttributeImpl(ProxyElement element,
                          int index)

Construct an Attribute node for the n'th attribute of a given element

Parameters:

element - The element containing the relevant attribute

index - The index position of the attribute starting at zero

Method Detail

getNameCode

public int getNameCode()

Get the name code, which enables the name to be located in the name pool

Specified by:

getNameCode in interface NodeInfo

Overrides:

getNameCode in class NodeImpl

getRoot

public NodeInfo getRoot()

Get the root node of the tree (not necessarily a document node)

Specified by:

getRoot in interface NodeInfo

Overrides:

getRoot in class NodeImpl

Returns:

the NodeInfo representing the root of this tree

getDocumentRoot

public DocumentInfo getDocumentRoot()

Get the root (document) node

Specified by:

getDocumentRoot in interface NodeInfo

Overrides:

getDocumentRoot in class NodeImpl

Returns:

the DocumentInfo representing the containing document

getNamePool

public NamePool getNamePool()

Get the NamePool for the tree containing this node

Specified by:

getNamePool in interface NodeInfo

Overrides:

getNamePool in class NodeImpl

Returns:

the NamePool

isSameNodeInfo

public boolean isSameNodeInfo(NodeInfo other)

Determine whether this is the same node as another node

Specified by:

isSameNodeInfo in interface NodeInfo

Overrides:

isSameNodeInfo in class NodeImpl

Returns:

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

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.

Overrides:

getSequenceNumber in class NodeImpl

getNodeKind

public final int getNodeKind()

Return the type of node.

Returns:

Node.ATTRIBUTE

getStringValue

public String getStringValue()

Return the character value of the node.

Returns:

the attribute value

getNextSibling

public NodeInfo getNextSibling()

Get next sibling - not defined for attributes

Overrides:

getNextSibling in class NodeImpl

Returns:

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

getPreviousSibling

public NodeInfo getPreviousSibling()

Get previous sibling - not defined for attributes

Overrides:

getPreviousSibling in class NodeImpl

Returns:

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

getPreviousInDocument

public NodeImpl getPreviousInDocument()

Get the previous node in document order (skipping attributes)

Overrides:

getPreviousInDocument in class NodeImpl

Returns:

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

generateId

public void generateId(FastStringBuffer buffer)

Get sequential key. Returns key of owning element with the attribute name as a suffix

Specified by:

generateId in interface NodeInfo

Overrides:

generateId in class NodeImpl

getDisplayName

public String getDisplayName()

Obtain the displayable name of this attribute.

Specified by:

getDisplayName in interface NodeInfo

Overrides:

getDisplayName in class NodeImpl

Returns:

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

copy

public void copy(Receiver out,
                 int whichNamespaces,
                 boolean copyAnnotations,
                 int locationId)
          throws XPathException

Copy this node to a given outputter

Throws:

XPathException