net.sf.saxon.tree
Class DocumentImpl

java.lang.Object
  net.sf.saxon.tree.NodeImpl
      net.sf.saxon.tree.DocumentImpl

All Implemented Interfaces:

javax.xml.transform.Source, javax.xml.transform.SourceLocator, PullEvent, DocumentInfo, FingerprintedNode, Item, MutableNodeInfo, NodeInfo, SiblingCountingNode, ValueRepresentation

public final class DocumentImpl
extends NodeImpl
implements DocumentInfo

A node in the XML parse tree representing the Document itself (or equivalently, the root node of the Document).

A DocumentImpl object may either represent a real document node, or it may represent an imaginary container for a parentless element.

Author:

Michael H. Kay

Field Summary

protected java.lang.Object	children
protected int	sequence

Fields inherited from class net.sf.saxon.tree.NodeImpl

index, NODE_LETTER, parent

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

ALL_NAMESPACES, EMPTY_NAMESPACE_LIST, IS_DTD_TYPE, IS_NILLED, LOCAL_NAMESPACES, NO_NAMESPACES

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

EMPTY_VALUE_ARRAY

Constructor Summary

DocumentImpl()
Create a DocumentImpl

Method Summary

void	addChild(NodeImpl node, int index) Add a child node to this node.
void	compact(int size) Compact the space used by this node
void	copy(Receiver out, int whichNamespaces, boolean copyAnnotations, int locationId) Copy this node to a given outputter
void	deIndex(NodeImpl node) Remove a node from any indexes when it is detached from the tree
protected void	deregisterID(java.lang.String id) Remove the entry for a given ID (when nodes are deleted).
protected AxisIterator	enumerateChildren(NodeTest test) Get an enumeration of the children of this node
void	generateId(FastStringBuffer buffer) Get a character string that uniquely identifies this node
java.lang.String	getBaseURI() Get the base URI of this root node.
Configuration	getConfiguration() Get the configuration previously set using setConfiguration
ElementImpl	getDocumentElement() Get the root (outermost) element.
int	getDocumentNumber() Get the unique document number
DocumentInfo	getDocumentRoot() Get the root (document) node
NodeInfo	getFirstChild() Get the first child node of the element
NodeInfo	getLastChild() Get the last child node of the element
int	getLineNumber() Get the line number of this root node.
NamePool	getNamePool() Get the name pool used for the names in this document
NodeInfo	getNextSibling() Get next sibling - always null
int	getNodeKind() Return the type of node.
protected NodeImpl	getNthChild(int n) Get the nth child node of the element (numbering from 0)
int	getNumberOfChildren() Determine how many children the node has
DocumentImpl	getPhysicalRoot() Get the physical root of the tree.
NodeInfo	getPreviousSibling() Get previous sibling - always null
NodeInfo	getRoot() Get the root node
protected long	getSequenceNumber() Get the node sequence number (in document order).
java.lang.String	getStringValue() Return the string-value of the node, that is, the concatenation of the character content of all descendent elements and text nodes.
java.lang.CharSequence	getStringValueCS() Get the value of the item as a CharSequence.
java.lang.String	getSystemId() Get the system id of this root node
java.lang.String[]	getUnparsedEntity(java.lang.String name) Get the unparsed entity with a given name
java.util.Iterator	getUnparsedEntityNames() Get the list of unparsed entities defined in this document
void	graftLocationMap(DocumentImpl original) Copy the system ID and line number map from another document (used when grafting a simplified stylesheet)
boolean	hasChildNodes() Determine if the node has any children.
void	insertChildren(NodeInfo[] source, boolean atStart, boolean inherit) Insert copies of a sequence of nodes as children of this node.
protected void	insertChildrenAt(NodeInfo[] source, int index, boolean inherit) Insert children before or after a given existing child
boolean	isImaginary() Ask whether this is an imaginary document node
Builder	newBuilder() Get a Builder suitable for building nodes that can be attached to this document.
protected void	registerID(NodeInfo e, java.lang.String id) Register a unique element ID.
protected void	removeChild(NodeImpl child) Remove a given child
protected void	replaceChildrenAt(NodeInfo[] source, int index, boolean inherit) Replace child at a given index by new children
void	replaceStringValue(java.lang.CharSequence stringValue) Replace the string-value of this node
NodeInfo	selectID(java.lang.String id) Get the element with a given ID.
void	setBaseURI(java.lang.String uri) Set the base URI of this document node
void	setConfiguration(Configuration config) Set the Configuration that contains this document
void	setImaginary(boolean imaginary) Set whether this is an imaginary document node
void	setLineNumbering() Set line numbering on
void	setSystemId(java.lang.String uri) Set the system id (base URI) of this node
protected void	useChildrenArray(NodeImpl[] array) Supply an array to be used for the array of children.

Methods inherited from class net.sf.saxon.tree.NodeImpl

addNamespace, atomize, compareOrder, delete, equals, getAttributeValue, getColumnNumber, getDeclaredNamespaces, getDisplayName, getFingerprint, getLocalPart, getNameCode, getNextInDocument, getParent, getPrefix, getPreviousInDocument, getPublicId, getSiblingPosition, getTypeAnnotation, getTypedValue, getURI, hashCode, insertSiblings, isId, isIdref, isNilled, isSameNodeInfo, iterateAxis, iterateAxis, putAttribute, removeAttribute, removeTypeAnnotation, rename, replace, setTypeAnnotation

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, compareOrder, equals, getAttributeValue, getColumnNumber, getDeclaredNamespaces, getDisplayName, getFingerprint, getLocalPart, getNameCode, getParent, getPrefix, getStringValue, getTypeAnnotation, getURI, hasChildNodes, hashCode, isId, isIdref, isNilled, isSameNodeInfo, iterateAxis, iterateAxis

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

getStringValueCS, getTypedValue

Field Detail

children

protected java.lang.Object children

sequence

protected int sequence

Constructor Detail

DocumentImpl

public DocumentImpl()

Create a DocumentImpl

Method Detail

setConfiguration

public void setConfiguration(Configuration config)

Set the Configuration that contains this document

Parameters:

config - the Saxon configuration

getConfiguration

public Configuration getConfiguration()

Get the configuration previously set using setConfiguration

Specified by:

getConfiguration in interface NodeInfo

Overrides:

getConfiguration in class NodeImpl

Returns:

the Saxon configuration

getNamePool

public NamePool getNamePool()

Get the name pool used for the names in this document

Specified by:

getNamePool in interface NodeInfo

Overrides:

getNamePool in class NodeImpl

Returns:

the namepool

newBuilder

public Builder newBuilder()

Get a Builder suitable for building nodes that can be attached to this document.

Specified by:

newBuilder in interface MutableNodeInfo

Overrides:

newBuilder in class NodeImpl

Returns:

a new TreeBuilder

setImaginary

public void setImaginary(boolean imaginary)

Set whether this is an imaginary document node

Parameters:

imaginary - if true, this is an imaginary node - the tree is really rooted at the topmost element

isImaginary

public boolean isImaginary()

Ask whether this is an imaginary document node

Returns:

true if this is an imaginary node - the tree is really rooted at the topmost element

getDocumentNumber

public int getDocumentNumber()

Get the unique document number

Specified by:

getDocumentNumber in interface NodeInfo

Overrides:

getDocumentNumber in class NodeImpl

Returns:

the document number of the document containing this node

graftLocationMap

public void graftLocationMap(DocumentImpl original)

Copy the system ID and line number map from another document (used when grafting a simplified stylesheet)

Parameters:

original - the document whose system ID and line number maps are to be grafted onto this tree

setSystemId

public void setSystemId(java.lang.String uri)

Set the system id (base URI) of this node

Specified by:

setSystemId in interface javax.xml.transform.Source

Overrides:

setSystemId in class NodeImpl

getSystemId

public java.lang.String getSystemId()

Get the system id of this root node

Specified by:

getSystemId in interface javax.xml.transform.Source

Specified by:

getSystemId in interface javax.xml.transform.SourceLocator

Specified by:

getSystemId in interface NodeInfo

Overrides:

getSystemId in class NodeImpl

Returns:

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

setBaseURI

public void setBaseURI(java.lang.String uri)

Set the base URI of this document node

Parameters:

uri - the new base URI

getBaseURI

public java.lang.String getBaseURI()

Get the base URI of this root node.

Specified by:

getBaseURI in interface NodeInfo

Overrides:

getBaseURI in class NodeImpl

Returns:

the base URI

setLineNumbering

public void setLineNumbering()

Set line numbering on

getLineNumber

public int getLineNumber()

Get the line number of this root node.

Specified by:

getLineNumber in interface javax.xml.transform.SourceLocator

Specified by:

getLineNumber in interface NodeInfo

Overrides:

getLineNumber in class NodeImpl

Returns:

0 always

getNodeKind

public final int getNodeKind()

Return the type of node.

Specified by:

getNodeKind in interface NodeInfo

Returns:

Type.DOCUMENT (always)

See Also:

Type

getNextSibling

public final NodeInfo getNextSibling()

Get next sibling - always null

Overrides:

getNextSibling in class NodeImpl

Returns:

null

getPreviousSibling

public final NodeInfo getPreviousSibling()

Get previous sibling - always null

Overrides:

getPreviousSibling in class NodeImpl

Returns:

null

getDocumentElement

public ElementImpl getDocumentElement()

Get the root (outermost) element.

Returns:

the Element node for the outermost element of the document.

getRoot

public NodeInfo getRoot()

Get the root 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 this document

getPhysicalRoot

public DocumentImpl getPhysicalRoot()

Get the physical root of the tree. This may be an imaginary document node: this method should be used only when control information held at the physical root is required

Overrides:

getPhysicalRoot in class NodeImpl

Returns:

the document node, which may be imaginary

generateId

public void generateId(FastStringBuffer buffer)

Get a character string that uniquely identifies this node

Specified by:

generateId in interface NodeInfo

Overrides:

generateId in class NodeImpl

Parameters:

buffer - a buffer into which will be placed a string based on the document number

deIndex

public void deIndex(NodeImpl node)

Remove a node from any indexes when it is detached from the tree

Parameters:

node - the node to be removed from all indexes

registerID

protected void registerID(NodeInfo e,
                          java.lang.String id)

Register a unique element ID. Does nothing if there is already an element with that ID.

Parameters:

e - The Element having a particular unique ID value

id - The unique ID value

selectID

public NodeInfo selectID(java.lang.String id)

Get the element with a given ID.

Specified by:

selectID in interface DocumentInfo

Parameters:

id - The unique ID of the required element, previously registered using registerID()

Returns:

The NodeInfo for the given ID if one has been registered, otherwise null.

deregisterID

protected void deregisterID(java.lang.String id)

Remove the entry for a given ID (when nodes are deleted). Does nothing if the id value is not present in the index.

Parameters:

id - The id value

getUnparsedEntityNames

public java.util.Iterator getUnparsedEntityNames()

Get the list of unparsed entities defined in this document

Specified by:

getUnparsedEntityNames in interface DocumentInfo

Returns:

an Iterator, whose items are of type String, containing the names of all unparsed entities defined in this document. If there are no unparsed entities or if the information is not available then an empty iterator is returned

getUnparsedEntity

public java.lang.String[] getUnparsedEntity(java.lang.String name)

Get the unparsed entity with a given name

Specified by:

getUnparsedEntity in interface DocumentInfo

Parameters:

name - the name of the entity

Returns:

if the entity exists, return an array of two Strings, the first holding the system ID of the entity, the second holding the public ID if there is one, or null if not. If the entity does not exist, return null. * @return the URI of the entity if there is one, or empty string if not

copy

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

Copy this node to a given outputter

Specified by:

copy in interface NodeInfo

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.

whichNamespaces - in the case of an element, controls which namespace nodes should be copied. Values are NodeInfo.NO_NAMESPACES, NodeInfo.LOCAL_NAMESPACES, NodeInfo.ALL_NAMESPACES

copyAnnotations - indicates whether the type annotations of element and attribute nodes should be copied

locationId - If non-zero, identifies the location of the instruction that requested this copy. If zero, indicates that the location information for the original node is to be copied; in this case the Receiver must be a LocationCopier

Throws:

XPathException

replaceStringValue

public void replaceStringValue(java.lang.CharSequence stringValue)

Replace the string-value of this node

Specified by:

replaceStringValue in interface MutableNodeInfo

Parameters:

stringValue - the new string value

getSequenceNumber

protected final 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 document nodes) 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. For nodes added by XQUery Update, the sequence number is -1L

Overrides:

getSequenceNumber in class NodeImpl

Returns:

the sequence number if there is one, or -1L otherwise.

hasChildNodes

public final boolean hasChildNodes()

Determine if the node has any children.

Specified by:

hasChildNodes in interface NodeInfo

Overrides:

hasChildNodes in class NodeImpl

Returns:

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

getNumberOfChildren

public int getNumberOfChildren()

Determine how many children the node has

Returns:

the number of children of this parent node

enumerateChildren

protected final AxisIterator enumerateChildren(NodeTest test)

Get an enumeration of the children of this node

Parameters:

test - A NodeTest to be satisfied by the child nodes, or null if all child node are to be returned

Returns:

an iterator over the children of this node

getFirstChild

public final NodeInfo getFirstChild()

Get the first child node of the element

Overrides:

getFirstChild in class NodeImpl

Returns:

the first child node of the required type, or null if there are no children

getLastChild

public final NodeInfo getLastChild()

Get the last child node of the element

Overrides:

getLastChild in class NodeImpl

Returns:

the last child of the element, or null if there are no children

getNthChild

protected final NodeImpl getNthChild(int n)

Get the nth child node of the element (numbering from 0)

Parameters:

n - identifies the required child

Returns:

the last child of the element, or null if there is no n'th child

removeChild

protected void removeChild(NodeImpl child)

Remove a given child

Parameters:

child - the child to be removed

getStringValue

public java.lang.String getStringValue()

Return the string-value of the node, that is, the concatenation of the character content of all descendent elements and text nodes.

Returns:

the accumulated character content of the element, including descendant elements.

See Also:

Item.getStringValueCS()

getStringValueCS

public java.lang.CharSequence getStringValueCS()

Description copied from class: NodeImpl

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 Item

Specified by:

getStringValueCS in interface ValueRepresentation

Overrides:

getStringValueCS in class NodeImpl

Returns:

the string value of the item

See Also:

Item.getStringValue()

useChildrenArray

protected void useChildrenArray(NodeImpl[] array)

Supply an array to be used for the array of children. For system use only.

Parameters:

array - the array to be used

addChild

public void addChild(NodeImpl node,
                     int index)

Add a child node to this node. For system use only. Note: normalizing adjacent text nodes is the responsibility of the caller.

Parameters:

node - the node to be added as a child of this node

index - the position where the child is to be added

insertChildren

public void insertChildren(NodeInfo[] source,
                           boolean atStart,
                           boolean inherit)

Insert copies of a sequence of nodes as children of this node.

This method takes no action unless the target node is a document node or element node. It also takes no action in respect of any supplied nodes that are not elements, text nodes, comments, or processing instructions.

The supplied nodes will be copied to form the new children. Adjacent text nodes will be merged, and zero-length text nodes removed.

Specified by:

insertChildren in interface MutableNodeInfo

Overrides:

insertChildren in class NodeImpl

Parameters:

source - the nodes to be inserted

atStart - true if the new nodes are to be inserted before existing children; false if they are

inherit - true if the inserted nodes are to inherit the namespaces that are in-scope for their new parent; false if such namespaces should be undeclared on the children

insertChildrenAt

protected void insertChildrenAt(NodeInfo[] source,
                                int index,
                                boolean inherit)

Insert children before or after a given existing child

Parameters:

source - the children to be inserted

index - the position before which they are to be inserted: 0 indicates insertion before the first child, 1 insertion before the second child, and so on.

inherit - true if the inserted nodes are to inherit the namespaces that are in-scope for their new parent; false if such namespaces should be undeclared on the children

replaceChildrenAt

protected void replaceChildrenAt(NodeInfo[] source,
                                 int index,
                                 boolean inherit)

Replace child at a given index by new children

Parameters:

source - the children to be inserted

index - the position at which they are to be inserted: 0 indicates replacement of the first child, replacement of the second child, and so on. The effect is undefined if index is out of range

inherit - set to true if the new child elements are to inherit the in-scope namespaces of their new parent

Throws:

java.lang.IllegalArgumentException - if any of the replacement nodes is not an element, text, comment, or processing instruction node

compact

public void compact(int size)

Compact the space used by this node

Parameters:

size - the number of actual children