net.sf.saxon.option.dom4j

Class DOM4JNodeWrapper

java.lang.Object

net.sf.saxon.tree.wrapper.AbstractNodeWrapper

net.sf.saxon.option.dom4j.DOM4JNodeWrapper

All Implemented Interfaces:

Source, PullEvent, Item, NodeInfo, Sequence, SteppingNode, SiblingCountingNode, VirtualNode

Direct Known Subclasses:

DOM4JDocumentWrapper

public class DOM4JNodeWrapper
extends AbstractNodeWrapper
implements SiblingCountingNode, SteppingNode

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 DOM4J nodes.

Author:

Michael H. Kay

Field Summary

Fields

Modifier and Type	Field and Description
protected DOM4JDocumentWrapper	docWrapper
protected int	index
protected org.dom4j.Node	node
protected short	nodeKind

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

ALL_NAMESPACES, IS_DTD_TYPE, IS_NILLED, LOCAL_NAMESPACES, NO_NAMESPACES

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DOM4JNodeWrapper(org.dom4j.Node node, DOM4JNodeWrapper parent, int index) This constructor is protected: nodes should be created using the wrap factory method on the DocumentWrapper class

Method Summary

Methods

Modifier and Type	Method and Description
int	compareOrder(NodeInfo other) Determine the relative position of this node and another node, in document order.
void	copy(Receiver out, int copyOptions, int locationId) Copy this node to a given outputter (deep copy)
void	generateId(FastStringBuffer buffer) Get a character string that uniquely identifies this node.
String	getAttributeValue(int fingerprint) Get the value of a given attribute of this node
String	getAttributeValue(String uri, String local) Get the string value of a given attribute of this node
Configuration	getConfiguration() Get the configuration
NamespaceBinding[]	getDeclaredNamespaces(NamespaceBinding[] buffer) Get all namespace undeclarations and undeclarations defined on this element.
String	getDisplayName() Get the display name of this node.
long	getDocumentNumber() Get the document number of the document containing this node.
DocumentInfo	getDocumentRoot() Get the root (document) node
DOM4JNodeWrapper	getFirstChild() Get the first child of this node
String	getLocalPart() Get the local part of the name of this node.
DOM4JNodeWrapper	getNextSibling() Get the next sibling of this node
int	getNodeKind() Return the type of node.
DOM4JNodeWrapper	getParent() Get the NodeInfo object representing the parent of this node
String	getPrefix() Get the prefix part of the name of this node.
DOM4JNodeWrapper	getPreviousSibling() Get the previous sibling of this node
NodeInfo	getRoot() Get the root node - always a document node with this tree implementation
int	getSiblingPosition() Get the index position of this node among its siblings (starting from 0)
CharSequence	getStringValueCS() Get the string value of the item as a CharSequence.
SteppingNode	getSuccessorElement(SteppingNode anchor, String uri, String local) Find the next matching element in document order; that is, the first child element with the required name if there is one; otherwise the next sibling element if there is one; otherwise the next sibling element of the parent, grandparent, etc, up to the anchor element.
String	getSystemId() Get the System ID for the node.
Object	getUnderlyingNode() Get the underlying DOM4J 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	isSameNodeInfo(NodeInfo other) Determine whether this is the same node as another node.
protected AxisIterator<NodeInfo>	iterateAttributes(NodeTest nodeTest) Return an iteration over the nodes reached by the given axis from this node // * @param axisNumber the axis to be used
protected AxisIterator<NodeInfo>	iterateChildren(NodeTest nodeTest) Return an iterator over the children of this node.
protected AxisIterator<NodeInfo>	iterateDescendants(NodeTest nodeTest, boolean includeSelf) Return an iterator over the descendants of this node.
protected AxisIterator<NodeInfo>	iterateSiblings(NodeTest nodeTest, boolean forwards) Return an iterator over the siblings of this node.
protected DOM4JNodeWrapper	makeWrapper(org.dom4j.Node node, DOM4JDocumentWrapper docWrapper) Factory method to wrap a DOM4J node with a wrapper that implements the Saxon NodeInfo interface.
protected DOM4JNodeWrapper	makeWrapper(org.dom4j.Node node, DOM4JDocumentWrapper docWrapper, DOM4JNodeWrapper parent, int index) Factory method to wrap a DOM4J node with a wrapper that implements the Saxon NodeInfo interface.
void	setSystemId(String uri) Set the system ID.

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

atomize, comparePosition, equals, getBaseURI, getColumnNumber, getFingerprint, getLineNumber, getNameCode, getNamePool, getRealNode, getSchemaType, getStringValue, getTypeAnnotation, hashCode, head, isId, isIdref, isNilled, iterate, iterateAxis, iterateAxis

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, comparePosition, equals, getBaseURI, getColumnNumber, getFingerprint, getLineNumber, getNameCode, getNamePool, getSchemaType, getStringValue, getTypeAnnotation, hashCode, isId, isIdref, isNilled, iterateAxis, iterateAxis

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

head, iterate

Field Detail

node

protected org.dom4j.Node node

nodeKind

protected short nodeKind

docWrapper

protected DOM4JDocumentWrapper docWrapper

index

protected int index

Constructor Detail

DOM4JNodeWrapper

protected DOM4JNodeWrapper(org.dom4j.Node node,
                DOM4JNodeWrapper parent,
                int index)

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

Parameters:

node - The DOM4J 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 DOM4JNodeWrapper makeWrapper(org.dom4j.Node node,
                           DOM4JDocumentWrapper docWrapper)

Factory method to wrap a DOM4J node with a wrapper that implements the Saxon NodeInfo interface.

Parameters:

node - The DOM4J node

docWrapper - The wrapper for the Document containing this node

Returns:

The new wrapper for the supplied node

makeWrapper

protected DOM4JNodeWrapper makeWrapper(org.dom4j.Node node,
                           DOM4JDocumentWrapper docWrapper,
                           DOM4JNodeWrapper parent,
                           int index)

Factory method to wrap a DOM4J node with a wrapper that implements the Saxon NodeInfo interface.

Parameters:

node - The DOM4J node

docWrapper - The wrapper for the Document containing this node

parent - The wrapper for the parent of the DOM4J node

index - The position of this node relative to its siblings

Returns:

The new wrapper for the supplied node

getUnderlyingNode

public Object getUnderlyingNode()

Get the underlying DOM4J node, to implement the VirtualNode interface

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

getSystemId

public String getSystemId()

Get the System ID for the node.

Specified by:

getSystemId in interface Source

Specified by:

getSystemId in interface NodeInfo

Overrides:

getSystemId in class AbstractNodeWrapper

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.

setSystemId

public void setSystemId(String uri)

Description copied from class: AbstractNodeWrapper

Set the system ID. Required because NodeInfo implements the JAXP Source interface

Specified by:

setSystemId in interface Source

Overrides:

setSystemId in class AbstractNodeWrapper

Parameters:

uri - the system ID.

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()

Description copied from interface: Item

Get the string value of the item as a CharSequence. This is in some cases more efficient than the version of the method that returns a String. The method satisfies the rule that X.getStringValueCS().toString() returns a string that is equal to X.getStringValue().

Note that two CharSequence values of different types should not be compared using equals(), and for the same reason they should not be used as a key in a hash table.

If the calling code can handle any CharSequence, this method should be used. If the caller requires a string, the Item.getStringValue() method is preferred.

Specified by:

getStringValueCS in interface Item

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, return null. 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 DOM4JNodeWrapper getParent()

Get the NodeInfo object representing the parent of this node

Specified by:

getParent in interface NodeInfo

Specified by:

getParent in interface SteppingNode

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)

Specified by:

getSiblingPosition in interface SiblingCountingNode

Returns:

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

iterateAttributes

protected AxisIterator<NodeInfo> iterateAttributes(NodeTest nodeTest)

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

// * @param axisNumber the axis to be used

Specified by:

iterateAttributes in class AbstractNodeWrapper

Parameters:

nodeTest - A pattern to be matched by the returned nodes

Returns:

a SequenceIterator that scans the nodes reached by the axis in turn.

iterateChildren

protected AxisIterator<NodeInfo> 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<NodeInfo> 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<NodeInfo> 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.

Specified by:

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(int fingerprint)

Get the value of a given attribute of this node

Parameters:

fingerprint - The fingerprint of the attribute name

Returns:

the attribute value if it exists or null if not

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:

9.4

getRoot

public NodeInfo getRoot()

Get the root node - always a document node with this tree implementation

Specified by:

getRoot in interface NodeInfo

Overrides:

getRoot in class AbstractNodeWrapper

Returns:

the NodeInfo representing the containing document

getDocumentRoot

public DocumentInfo getDocumentRoot()

Get the root (document) node

Specified by:

getDocumentRoot in interface NodeInfo

Returns:

the DocumentInfo representing the containing document

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

getDocumentNumber

public long getDocumentNumber()

Get the document number of the document containing this node. For a free-standing orphan node, just return the hashcode.

Specified by:

getDocumentNumber in interface NodeInfo

Overrides:

getDocumentNumber in class AbstractNodeWrapper

Returns:

the document number of the document containing this node

copy

public void copy(Receiver out,
        int copyOptions,
        int locationId)
          throws XPathException

Copy this node to a given outputter (deep copy)

Specified by:

copy in interface NodeInfo

Overrides:

copy in class AbstractNodeWrapper

Parameters:

out - the Receiver to which the node should be copied. It is the caller's responsibility to ensure that this Receiver is open before the method is called (or that it is self-opening), and that it is closed after use.

copyOptions - a selection of the options defined in CopyOptions

locationId - If non-zero, identifies the location of the instruction that requested this copy. If zero, indicates that the location information

Throws:

XPathException - if any downstream error occurs

getNextSibling

public DOM4JNodeWrapper getNextSibling()

Description copied from interface: SteppingNode

Get the next sibling of this node

Specified by:

getNextSibling in interface SteppingNode

Returns:

the next sibling if there is one, or null otherwise

getPreviousSibling

public DOM4JNodeWrapper getPreviousSibling()

Description copied from interface: SteppingNode

Get the previous sibling of this node

Specified by:

getPreviousSibling in interface SteppingNode

Returns:

the previous sibling if there is one, or null otherwise

getFirstChild

public DOM4JNodeWrapper getFirstChild()

Description copied from interface: SteppingNode

Get the first child of this node

Specified by:

getFirstChild in interface SteppingNode

Returns:

the first child if there is one, or null otherwise

getSuccessorElement

public SteppingNode getSuccessorElement(SteppingNode anchor,
                               String uri,
                               String local)

Description copied from interface: SteppingNode

Find the next matching element in document order; that is, the first child element with the required name if there is one; otherwise the next sibling element if there is one; otherwise the next sibling element of the parent, grandparent, etc, up to the anchor element.

Specified by:

getSuccessorElement in interface SteppingNode

Parameters:

anchor - the root of the tree within which navigation is confined

uri - the required namespace URI, or null if any namespace is acceptable

local - the required local name, or null if any local name is acceptable

Returns:

the next element after this one in document order, with the given URI and local name if specified, or null if this is the last node in the document, or the last node within the subtree being navigated

isSameNodeInfo

public boolean isSameNodeInfo(NodeInfo other)

Determine whether this is the same node as another node. Note: a.isSameNodeInfo(b) if and only if generateId(a)==generateId(b). This method has the same semantics as isSameNode() in DOM Level 3, but works on Saxon NodeInfo objects rather than DOM Node objects.

Specified by:

isSameNodeInfo in interface NodeInfo

Overrides:

isSameNodeInfo in class AbstractNodeWrapper

Parameters:

other - the node to be compared with this node

Returns:

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

getConfiguration

public Configuration getConfiguration()

Description copied from class: AbstractNodeWrapper

Get the configuration

Specified by:

getConfiguration in interface NodeInfo

Overrides:

getConfiguration in class AbstractNodeWrapper

Returns:

the Configuration

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.