com.saxonica.ee.stream.om

Class FleetingNode

java.lang.Object

com.saxonica.ee.stream.om.FleetingNode

All Implemented Interfaces:

java.lang.Iterable<NodeInfo>, javax.xml.transform.Source, javax.xml.transform.SourceLocator, Location, GroundedValue<NodeInfo>, Item<NodeInfo>, NodeInfo, Sequence<NodeInfo>, org.xml.sax.Locator

Direct Known Subclasses:

FleetingParentNode

public class FleetingNode
extends java.lang.Object
implements NodeInfo

A FleetingNode is a node that exists transiently in the course of streaming processing. The node has a parent (unless it is the root), and the case of an element node it also has attributes and namespaces. If it is a "remembered ancestor" then it may have descendants, but these cannot be found using the descendant axis. It has no following or preceding nodes.

Field Summary

Fields

Modifier and Type	Field and Description
protected FleetingDocumentNode	root

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

IS_DTD_TYPE, IS_NILLED

Constructor Summary

Constructors

Constructor and Description
FleetingNode()

Method Summary

Modifier and Type	Method and Description
AtomicSequence	atomize() Get the typed value.
int	compareOrder(NodeInfo other) Determine the relative position of this node and another node, in document order.
boolean	equals(java.lang.Object other) Determine whether this is the same node as another node.
void	generateId(FastStringBuffer buffer) Construct a character string that uniquely identifies this node.
java.lang.String	getAttributeValue(java.lang.String uri, java.lang.String local) Get the string value of a given attribute of this node
java.lang.String	getBaseURI() Get the Base URI for the node, that is, the URI used for resolving a relative URI contained in the node.
Configuration	getConfiguration() Get the configuration used to build the tree containing this node.
NamespaceBinding[]	getDeclaredNamespaces(NamespaceBinding[] buffer) Get all namespace declarations and undeclarations defined on this element.
int	getDepth() Get the depth of this node in the tree.
java.lang.String	getDisplayName() Get the display name of this node, in the form of a lexical QName.
int	getFingerprint() Get fingerprint.
java.lang.String	getLocalPart() Get the local part of the name of this node.
NamePool	getNamePool() Get the NamePool that holds the namecode for this node
int	getNodeKind() Get the kind of node.
int	getNodeNumber() Get the serial number of this node within the containing document
NodeInfo	getParent() Get the NodeInfo object representing the parent of this node
java.lang.String	getPrefix() Get the prefix of the name of the node.
NodeInfo	getRoot() Get the root node of the tree containing this node
SchemaType	getSchemaType() Get the type annotation of this node, if any.
java.lang.String	getStringValue() Return the string value of the node as defined in the XPath data model.
java.lang.CharSequence	getStringValueCS() Get the string value of the item as a CharSequence.
java.lang.String	getSystemId() Get the System ID for the node.
TreeInfo	getTreeInfo() Get information about the tree to which this NodeInfo belongs
java.lang.String	getURI() Get the URI part of the name of this node.
boolean	hasChildNodes() Determine whether the node has any children.
boolean	hasFingerprint() Ask whether this NodeInfo implementation holds a fingerprint identifying the name of the node in the NamePool.
NodeInfo	head() To implement Sequence, this method returns the item itself
boolean	isStreamed() Ask whether this is a node in a streamed document
UnfailingIterator<NodeInfo>	iterate() To implement Sequence, this method returns a singleton iterator that delivers this item in the form of a sequence
AxisIterator	iterateAxis(byte axisNumber, NodeTest nodeTest) Return an iteration over all the nodes reached by the given axis from this node that match a given NodeTest
Location	saveLocation() Get an immutable copy of this Location object.
void	setNodeKind(int nodeKind)
void	setNodeName(NodeName name)
void	setParent(FleetingNode parent)
void	setStringValue(java.lang.CharSequence stringValue)
void	setSystemId(java.lang.String systemId) Set the system identifier for this Source.
void	setTypeAnnotation(SchemaType typeAnnotation)

Methods inherited from class java.lang.Object

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

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

copy, getColumnNumber, getGenre, getLineNumber, getPublicId, hashCode, isId, isIdref, isNilled, isSameNodeInfo, iterateAxis, toShortString

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

getLength, itemAt, 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

Field Detail

root

protected FleetingDocumentNode root

Constructor Detail

FleetingNode

public FleetingNode()

Method Detail

head

public NodeInfo head()

To implement Sequence, this method returns the item itself

Specified by:

head in interface GroundedValue<NodeInfo>

Specified by:

head in interface Item<NodeInfo>

Specified by:

head in interface Sequence<NodeInfo>

Returns:

this item

iterate

public UnfailingIterator<NodeInfo> iterate()

To implement Sequence, this method returns a singleton iterator that delivers this item in the form of a sequence

Specified by:

iterate in interface GroundedValue<NodeInfo>

Specified by:

iterate in interface Item<NodeInfo>

Specified by:

iterate in interface Sequence<NodeInfo>

Returns:

a singleton iterator that returns this item

getTreeInfo

public TreeInfo getTreeInfo()

Get information about the tree to which this NodeInfo belongs

Specified by:

getTreeInfo in interface NodeInfo

Returns:

the TreeInfo

Since:

9.7

getDepth

public int getDepth()

Get the depth of this node in the tree.

Returns:

0 for the document node, 1 for the outermost element, etc

getNodeNumber

public int getNodeNumber()

Get the serial number of this node within the containing document

Returns:

the serial number of this node: this reflects document order.

setParent

public void setParent(FleetingNode parent)

setNodeName

public void setNodeName(NodeName name)

setNodeKind

public void setNodeKind(int nodeKind)

setStringValue

public void setStringValue(java.lang.CharSequence stringValue)

setTypeAnnotation

public void setTypeAnnotation(SchemaType typeAnnotation)

getNodeKind

public final int getNodeKind()

Get the kind of node. This will be a value such as Type.ELEMENT or Type.ATTRIBUTE. There are seven kinds of node: documents, elements, attributes, text, comments, processing-instructions, and namespaces.

Specified by:

getNodeKind in interface NodeInfo

Returns:

an integer identifying the kind of node. These integer values are the same as those used in the DOM

Since:

8.4

See Also:

Type

equals

public final boolean equals(java.lang.Object other)

Determine whether this is the same node as another node.

Note that two different NodeInfo instances can represent the same conceptual node. Therefore the "==" operator should not be used to test node identity. The equals() method should give the same result as isSameNodeInfo(), but since this rule was introduced late it might not apply to all implementations.

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:

equals in interface NodeInfo

Overrides:

equals in class java.lang.Object

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.

getSystemId

public java.lang.String getSystemId()

Get the System ID for the node. Note this is not the same as the base URI: the base URI can be modified by xml:base, but the system ID cannot. The base URI is used primarily for resolving relative URIs within the content of the document. The system ID is used primarily in conjunction with a line number, for identifying the location of elements within the source XML, in particular when errors are found. For a document node, the System ID represents the value of the document-uri property as defined in the XDM data model.

Specified by:

getSystemId in interface javax.xml.transform.Source

Specified by:

getSystemId in interface javax.xml.transform.SourceLocator

Specified by:

getSystemId in interface Location

Specified by:

getSystemId in interface NodeInfo

Specified by:

getSystemId in interface org.xml.sax.Locator

Returns:

the System Identifier of the entity in the source document containing the node, or null if not known or not applicable.

Since:

8.4

getBaseURI

public java.lang.String getBaseURI()

Get the Base URI for the node, that is, the URI used for resolving a relative URI contained in the node. This will be the same as the System ID unless xml:base has been used. Where the node does not have a base URI of its own, the base URI of its parent node is returned.

Specified by:

getBaseURI in interface NodeInfo

Returns:

the base URI of the node. This may be null if the base URI is unknown.

Since:

8.4

saveLocation

public Location saveLocation()

Get an immutable copy of this Location object. By default Location objects may be mutable, so they should not be saved for later use. The result of this operation holds the same location information, but in an immutable form.

Specified by:

saveLocation in interface Location

compareOrder

public final int compareOrder(NodeInfo other)

Determine the relative position of this node and another node, in document order.

The other node must always be in the same tree; the effect of calling this method when the two nodes are in different trees is undefined. To obtain a global ordering of nodes, the application should first compare the result of getDocumentNumber(), and only if the document number is the same should compareOrder() be called.

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())

Since:

8.4

getStringValue

public final java.lang.String getStringValue()

Return the string value of the node as defined in the XPath data model.

The interpretation of this depends on the type of node. For an element it is the accumulated character content of the element, including descendant elements.

This method returns the string value as if the node were untyped. Unlike the string value accessor in the XPath 2.0 data model, it does not report an error if the element has a complex type, instead it returns the concatenation of the descendant text nodes as it would if the element were untyped.

Specified by:

getStringValue in interface GroundedValue<NodeInfo>

Specified by:

getStringValue in interface Item<NodeInfo>

Specified by:

getStringValue in interface NodeInfo

Returns:

the string value of the node

Since:

8.4

See Also:

Item.getStringValueCS()

hasFingerprint

public boolean hasFingerprint()

Ask whether this NodeInfo implementation holds a fingerprint identifying the name of the node in the NamePool. If the answer is true, then the getFingerprint() method must return the fingerprint of the node. If the answer is false, then the getFingerprint() method should throw an UnsupportedOperationException. In the case of unnamed nodes such as text nodes, the result can be either true (in which case getFingerprint() should return -1) or false (in which case getFingerprint may throw an exception).

Specified by:

hasFingerprint in interface NodeInfo

Returns:

true if the implementation of this node provides fingerprints.

Since:

9.8; previously Saxon relied on using FingerprintedNode as a marker interface.

getFingerprint

public final int getFingerprint()

Get fingerprint. The fingerprint is a coded form of the expanded name of the node: two nodes with the same name code have the same namespace URI and the same local name. The fingerprint contains no information about the namespace prefix. For a name in the null namespace, the fingerprint is the same as the name code.

Specified by:

getFingerprint in interface NodeInfo

Returns:

an integer fingerprint; two nodes with the same fingerprint have the same expanded QName. For unnamed nodes (text nodes, comments, document nodes, and namespace nodes for the default namespace), returns -1.

Since:

8.4

getLocalPart

public final java.lang.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 "". Unlike the DOM interface, this returns the full name in the case of a non-namespaced name.

Since:

8.4

getURI

public final java.lang.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 an element or attribute that is not in a namespace, or for a processing instruction, returns an empty string.

Since:

8.4

getDisplayName

public final java.lang.String getDisplayName()

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

Specified by:

getDisplayName in interface NodeInfo

Returns:

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

Since:

8.4

getPrefix

public final java.lang.String getPrefix()

Get the prefix of the name of the node. This is defined only for elements and attributes. If the node has no prefix, or for other kinds of node, returns a zero-length string.

Specified by:

getPrefix in interface NodeInfo

Returns:

The prefix of the name of the node.

Since:

8.4

getConfiguration

public Configuration getConfiguration()

Get the configuration used to build the tree containing this node.

Specified by:

getConfiguration in interface NodeInfo

Returns:

the Configuration

Since:

8.4

getNamePool

public NamePool getNamePool()

Get the NamePool that holds the namecode for this node

Returns:

the namepool

Since:

8.4

getSchemaType

public final SchemaType getSchemaType()

Get the type annotation of this node, if any. The type annotation is represented as SchemaType object.

Types derived from a DTD are not reflected in the result of this method.

Specified by:

getSchemaType in interface NodeInfo

Returns:

For element and attribute nodes: the type annotation derived from schema validation (defaulting to xs:untyped and xs:untypedAtomic in the absence of schema validation). For comments, text nodes, processing instructions, and namespaces: null. For document nodes, either xs:untyped if the document has not been validated, or xs:anyType if it has.

Since:

9.4

atomize

public AtomicSequence atomize()
                       throws XPathException

Get the typed value.

Specified by:

atomize in interface Item<NodeInfo>

Specified by:

atomize in interface NodeInfo

Returns:

the typed value. This will either be a single AtomicValue or a Value whose items are atomic values.

Throws:

XPathException - if the node has no typed value, for example if it is an element node with element-only content

getParent

public final 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

iterateAxis

public AxisIterator iterateAxis(byte axisNumber,
                                NodeTest nodeTest)

Return an iteration over all the nodes reached by the given axis from this node that match a given NodeTest

Specified by:

iterateAxis in interface NodeInfo

Parameters:

axisNumber - an integer identifying the axis; one of the constants defined in class AxisInfo

nodeTest - A condition to be satisfied by the returned nodes; nodes that do not satisfy this condition are not included in the result

Returns:

an AxisIterator that delivers the nodes reached by the axis in turn. The nodes are returned in axis order (document order for a forwards axis, reverse document order for a reverse axis).

Throws:

java.lang.UnsupportedOperationException - if the namespace axis is requested and this axis is not supported for this implementation.

See Also:

AxisInfo

getAttributeValue

public java.lang.String getAttributeValue(java.lang.String uri,
                                          java.lang.String local)

Get the string value of a given attribute of this node

Specified by:

getAttributeValue in interface NodeInfo

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 of the tree containing this node

Specified by:

getRoot in interface NodeInfo

Returns:

the NodeInfo representing the top-level ancestor of this node. This will not necessarily be a document node. If this node has no parent, then the method returns this node.

Since:

8.4

hasChildNodes

public boolean hasChildNodes()

Determine whether the node has any children.

Note: the result is equivalent to iterateAxis(Axis.CHILD).next() != null

Specified by:

hasChildNodes in interface NodeInfo

Returns:

True if the node has one or more children

Since:

8.4

generateId

public void generateId(FastStringBuffer buffer)

Construct 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 which will be updated to hold a string that uniquely identifies this node, across all documents.

Since:

8.7

Changed in Saxon 8.7 to generate the ID value in a client-supplied buffer

getDeclaredNamespaces

public NamespaceBinding[] getDeclaredNamespaces(NamespaceBinding[] buffer)

Get all namespace declarations and undeclarations defined on this element.

This method is intended primarily for internal use. User applications needing information about the namespace context of a node should use iterateAxis(Axis.NAMESPACE). (However, not all implementations support the namespace axis, whereas all implementations are required to support this method.)

Specified by:

getDeclaredNamespaces in interface NodeInfo

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.

isStreamed

public boolean isStreamed()

Ask whether this is a node in a streamed document

Specified by:

isStreamed in interface Item<NodeInfo>

Specified by:

isStreamed in interface NodeInfo

Returns:

true if the node is in a document being processed using streaming

setSystemId

public void setSystemId(java.lang.String systemId)

Set the system identifier for this Source.

The system identifier is optional if the source does not get its data from a URL, but it may still be useful to provide one. The application can use a system identifier, for example, to resolve relative URIs and to include in error messages and warnings.

Specified by:

setSystemId in interface javax.xml.transform.Source

Parameters:

systemId - The system identifier as a URL string.

getStringValueCS

public java.lang.CharSequence getStringValueCS()

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 getStringValue() method is preferred.

Specified by:

getStringValueCS in interface GroundedValue<NodeInfo>

Specified by:

getStringValueCS in interface Item<NodeInfo>

Returns:

the string value of the item

Since:

8.4

See Also:

getStringValue()