net.sf.saxon.option.jdom

Class JDOMNodeWrapper

java.lang.Object

net.sf.saxon.tree.wrapper.AbstractNodeWrapper

net.sf.saxon.option.jdom.JDOMNodeWrapper

All Implemented Interfaces:

Iterable<NodeInfo>, Source, SourceLocator, Location, GroundedValue<NodeInfo>, Item<NodeInfo>, NodeInfo, Sequence<NodeInfo>, SiblingCountingNode, VirtualNode, Locator

public class JDOMNodeWrapper
extends AbstractNodeWrapper
implements SiblingCountingNode

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

This is the implementation of the NodeInfo interface used as a wrapper for JDOM nodes.

Author:

Michael H. Kay

Field Summary

Fields

Modifier and Type	Field and Description
protected int	index
protected Object	node
protected short	nodeKind

Fields inherited from class net.sf.saxon.tree.wrapper.AbstractNodeWrapper

treeInfo

Fields inherited from interface net.sf.saxon.om.NodeInfo

IS_DTD_TYPE, IS_NILLED

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	JDOMNodeWrapper(Object node, JDOMNodeWrapper parent, int index) This constructor is protected: nodes should be created using the wrap factory method on the DocumentWrapper class

Method Summary

Modifier and Type	Method and Description
int	compareOrder(NodeInfo other) Determine the relative position of this node and another node, in document order.
void	generateId(FastStringBuffer buffer) Get a character string that uniquely identifies this node.
String	getAttributeValue(String uri, String local) Get the string value of a given attribute of this node
NamespaceBinding[]	getDeclaredNamespaces(NamespaceBinding[] buffer) Get all namespace undeclarations and undeclarations defined on this element.
String	getDisplayName() Get the display name of this node.
String	getLocalPart() Get the local part of the name of this node.
int	getNodeKind() Return the type of node.
NodeInfo	getParent() Get the NodeInfo object representing the parent of this node
String	getPrefix() Get the prefix part of the name of this node.
int	getSiblingPosition() Get the index position of this node among its siblings (starting from 0) In the case of a text node that maps to several adjacent siblings in the JDOM, the numbering actually refers to the position of the underlying JDOM nodes; thus the sibling position for the text node is that of the first JDOM node to which it relates, and the numbering of subsequent XPath nodes is not necessarily consecutive.
CharSequence	getStringValueCS() Get the value of the item as a CharSequence.
JDOMDocumentWrapper	getTreeInfo() Get information about the tree to which this NodeInfo belongs
Object	getUnderlyingNode() Get the underlying JDOM node, to implement the VirtualNode interface.
String	getURI() Get the URI part of the name of this node.
boolean	hasChildNodes() Determine whether the node has any children.
boolean	isId() Determine whether this node has the is-id property
boolean	isIdref() Determine whether this node has the is-idref property
protected AxisIterator	iterateAttributes(NodeTest nodeTest) Return an iterator over the attributes of this element node.
protected AxisIterator	iterateChildren(NodeTest nodeTest) Return an iterator over the children of this node.
protected AxisIterator	iterateDescendants(NodeTest nodeTest, boolean includeSelf) Return an iterator over the descendants of this node.
protected AxisIterator	iterateSiblings(NodeTest nodeTest, boolean forwards) Return an iterator over the siblings of this node.
protected static JDOMNodeWrapper	makeWrapper(Object node, JDOMDocumentWrapper docWrapper) Factory method to wrap a JDOM node with a wrapper that implements the Saxon NodeInfo interface.
protected static JDOMNodeWrapper	makeWrapper(Object node, JDOMDocumentWrapper docWrapper, JDOMNodeWrapper parent, int index) Factory method to wrap a JDOM node with a wrapper that implements the Saxon NodeInfo interface.

Methods inherited from class net.sf.saxon.tree.wrapper.AbstractNodeWrapper

atomize, equals, getBaseURI, getColumnNumber, getFingerprint, getLineNumber, getNamePool, getRealNode, getRoot, getStringValue, getSystemId, hasFingerprint, hashCode, iterateAxis, iterateAxis, saveLocation, setSystemId

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.saxon.om.NodeInfo

atomize, copy, equals, getBaseURI, getColumnNumber, getConfiguration, getFingerprint, getGenre, getLineNumber, getPublicId, getRoot, getSchemaType, getStringValue, getSystemId, hasFingerprint, hashCode, isNilled, isSameNodeInfo, isStreamed, iterateAxis, iterateAxis, toShortString

Methods inherited from interface javax.xml.transform.Source

setSystemId

Methods inherited from interface net.sf.saxon.om.Item

getLength, head, itemAt, iterate, iterator, reduce, subsequence, toGroundedValue

Methods inherited from interface net.sf.saxon.om.GroundedValue

asIterable, effectiveBooleanValue, materialize

Methods inherited from interface net.sf.saxon.om.Sequence

makeRepeatable

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface net.sf.saxon.expr.parser.Location

saveLocation

Field Detail

node

protected Object node

nodeKind

protected short nodeKind

index

protected int index

Constructor Detail

JDOMNodeWrapper

protected JDOMNodeWrapper(Object node,
                          JDOMNodeWrapper parent,
                          int index)

This constructor is protected: nodes should be created using the wrap factory method on the DocumentWrapper class

Parameters:

node - The JDOM node to be wrapped

parent - The NodeWrapper that wraps the parent of this node

index - Position of this node among its siblings

Method Detail

makeWrapper

protected static JDOMNodeWrapper makeWrapper(Object node,
                                             JDOMDocumentWrapper docWrapper)

Factory method to wrap a JDOM node with a wrapper that implements the Saxon NodeInfo interface.

Parameters:

node - The JDOM node

docWrapper - The wrapper for the Document containing this node

Returns:

The new wrapper for the supplied node

makeWrapper

protected static JDOMNodeWrapper makeWrapper(Object node,
                                             JDOMDocumentWrapper docWrapper,
                                             JDOMNodeWrapper parent,
                                             int index)

Factory method to wrap a JDOM node with a wrapper that implements the Saxon NodeInfo interface.

Parameters:

node - The JDOM node

docWrapper - The wrapper for the Document containing this node

parent - The wrapper for the parent of the JDOM node

index - The position of this node relative to its siblings

Returns:

The new wrapper for the supplied node

getTreeInfo

public JDOMDocumentWrapper getTreeInfo()

Description copied from interface: NodeInfo

Get information about the tree to which this NodeInfo belongs

Specified by:

getTreeInfo in interface NodeInfo

Overrides:

getTreeInfo in class AbstractNodeWrapper

Returns:

the TreeInfo

getUnderlyingNode

public Object getUnderlyingNode()

Get the underlying JDOM node, to implement the VirtualNode interface. If this wrapper node represents a list of adjacent text nodes, then the first of the text nodes is returned.

Specified by:

getUnderlyingNode in interface VirtualNode

Returns:

The underlying node.

getNodeKind

public int getNodeKind()

Return the type of node.

Specified by:

getNodeKind in interface NodeInfo

Returns:

one of the values Node.ELEMENT, Node.TEXT, Node.ATTRIBUTE, etc.

See Also:

Type

compareOrder

public 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

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())

getStringValueCS

public CharSequence getStringValueCS()

Get the value of the item as a CharSequence. This is in some cases more efficient than the version of the method that returns a String.

Specified by:

getStringValueCS in interface GroundedValue<NodeInfo>

Specified by:

getStringValueCS in interface Item<NodeInfo>

Returns:

the string value of the item

See Also:

Item.getStringValue()

getLocalPart

public String getLocalPart()

Get the local part of the name of this node. This is the name after the ":" if any.

Specified by:

getLocalPart in interface NodeInfo

Returns:

the local part of the name. For an unnamed node, returns "".

getPrefix

public String getPrefix()

Get the prefix part of the name of this node. This is the name before the ":" if any. (Note, this method isn't required as part of the NodeInfo interface.)

Specified by:

getPrefix in interface NodeInfo

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

Returns:

The URI of the namespace of this node. For an unnamed node, or for a node with an empty prefix, return an empty string.

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 AbstractNodeWrapper

Returns:

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

getParent

public NodeInfo getParent()

Get the NodeInfo object representing the parent of this node

Specified by:

getParent in interface NodeInfo

Returns:

the parent of this node; null if this node has no parent

getSiblingPosition

public int getSiblingPosition()

Get the index position of this node among its siblings (starting from 0) In the case of a text node that maps to several adjacent siblings in the JDOM, the numbering actually refers to the position of the underlying JDOM nodes; thus the sibling position for the text node is that of the first JDOM node to which it relates, and the numbering of subsequent XPath nodes is not necessarily consecutive.

Specified by:

getSiblingPosition in interface SiblingCountingNode

Returns:

0 for the first child, 1 for the second child, etc.

iterateAttributes

protected AxisIterator iterateAttributes(NodeTest nodeTest)

Description copied from class: AbstractNodeWrapper

Return an iterator over the attributes of this element node. This method is only called after checking that the node is an element.

Specified by:

iterateAttributes in class AbstractNodeWrapper

Parameters:

nodeTest - a test that the returned attributes must satisfy

Returns:

an iterator over the attribute nodes. The order of the result, although arbitrary, must be consistent with document order.

iterateChildren

protected AxisIterator iterateChildren(NodeTest nodeTest)

Description copied from class: AbstractNodeWrapper

Return an iterator over the children of this node. This method is only called after checking that the node is an element or document.

Specified by:

iterateChildren in class AbstractNodeWrapper

Parameters:

nodeTest - a test that the returned attributes must satisfy

Returns:

an iterator over the child nodes, in document order.

iterateSiblings

protected AxisIterator iterateSiblings(NodeTest nodeTest,
                                       boolean forwards)

Description copied from class: AbstractNodeWrapper

Return an iterator over the siblings of this node. This method is only called after checking that the node is an element, text, comment, or PI node.

Specified by:

iterateSiblings in class AbstractNodeWrapper

Parameters:

nodeTest - a test that the returned siblings must satisfy

forwards - true for following siblings, false for preceding siblings

Returns:

an iterator over the sibling nodes, in axis order.

iterateDescendants

protected AxisIterator iterateDescendants(NodeTest nodeTest,
                                          boolean includeSelf)

Description copied from class: AbstractNodeWrapper

Return an iterator over the descendants of this node. This method is only called after checking that the node is an element or document node.

Overrides:

iterateDescendants in class AbstractNodeWrapper

Parameters:

nodeTest - a test that the returned descendants must satisfy

includeSelf - true if this node is to be included in the result

Returns:

an iterator over the sibling nodes, in axis order.

getAttributeValue

public String getAttributeValue(String uri,
                                String local)

Get the string value of a given attribute of this node

Specified by:

getAttributeValue in interface NodeInfo

Overrides:

getAttributeValue in class AbstractNodeWrapper

Parameters:

uri - the namespace URI of the attribute name. Supply the empty string for an attribute that is in no namespace

local - the local part of the attribute name.

Returns:

the attribute value if it exists, or null if it does not exist. Always returns null if this node is not an element.

Since:

8.4

hasChildNodes

public boolean hasChildNodes()

Determine whether the node has any children.

Note: the result is equivalent to getEnumeration(Axis.CHILD, AnyNodeTest.getInstance()).hasNext()

Specified by:

hasChildNodes in interface NodeInfo

Overrides:

hasChildNodes in class AbstractNodeWrapper

Returns:

True if the node has one or more children

generateId

public void generateId(FastStringBuffer buffer)

Get a character string that uniquely identifies this node. Note: a.isSameNode(b) if and only if generateId(a)==generateId(b)

Specified by:

generateId in interface NodeInfo

Parameters:

buffer - a Buffer to contain a string that uniquely identifies this node, across all documents

getDeclaredNamespaces

public NamespaceBinding[] getDeclaredNamespaces(NamespaceBinding[] buffer)

Get all namespace undeclarations and undeclarations defined on this element.

Specified by:

getDeclaredNamespaces in interface NodeInfo

Overrides:

getDeclaredNamespaces in class AbstractNodeWrapper

Parameters:

buffer - If this is non-null, and the result array fits in this buffer, then the result may overwrite the contents of this array, to avoid the cost of allocating a new array on the heap.

Returns:

An array of integers representing the namespace declarations and undeclarations present on this element. For a node other than an element, return null. Otherwise, the returned array is a sequence of namespace codes, whose meaning may be interpreted by reference to the name pool. The top half word of each namespace code represents the prefix, the bottom half represents the URI. If the bottom half is zero, then this is a namespace undeclaration rather than a declaration. The XML namespace is never included in the list. If the supplied array is larger than required, then the first unused entry will be set to -1.

For a node other than an element, the method returns null.

isId

public boolean isId()

Determine whether this node has the is-id property

Specified by:

isId in interface NodeInfo

Returns:

true if the node is an ID

isIdref

public boolean isIdref()

Determine whether this node has the is-idref property

Specified by:

isIdref in interface NodeInfo

Returns:

true if the node is an IDREF or IDREFS element or attribute