net.sf.saxon.tree.linked

Class DocumentImpl

java.lang.Object

net.sf.saxon.tree.linked.NodeImpl

net.sf.saxon.tree.linked.DocumentImpl

All Implemented Interfaces:

Source, SourceLocator, PullEvent, Location, FingerprintedNode, Item, MutableDocumentInfo, MutableNodeInfo, NodeInfo, Sequence, TreeInfo, SteppingNode<NodeImpl>, SiblingCountingNode, Locator

public final class DocumentImpl
extends NodeImpl
implements TreeInfo, MutableDocumentInfo

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

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

NODE_LETTER

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

ALL_NAMESPACES, IS_DTD_TYPE, IS_NILLED, LOCAL_NAMESPACES, NO_NAMESPACES

Constructor Summary

Constructors

Constructor and Description
DocumentImpl() Create a DocumentImpl

Method Summary

Methods

Modifier and Type	Method and Description
protected void	addChild(NodeImpl node, int index) Add a child node to this node.
void	addNilledElement(ElementImpl element) Add a nilled element.
void	compact(int size) Compact the space used by this node
void	copy(Receiver out, int copyOptions, Location 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(String id) Remove the entry for a given ID (when nodes are deleted).
void	generateId(FastStringBuffer buffer) Get a character string that uniquely identifies this node
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.
long	getDocumentNumber() Get the unique document number
NodeImpl	getFirstChild() Get the first child node of the element
NodeImpl	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
NodeImpl	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.
NodeImpl	getPreviousSibling() Get previous sibling - always null
protected int	getRawSequenceNumber()
NodeInfo	getRoot() Get the root node
NodeInfo	getRootNode() Get the NodeInfo object representing the document node at the root of the tree
SchemaType	getSchemaType() Get the type annotation
protected long	getSequenceNumber() Get the node sequence number (in document order).
String	getStringValue() Return the string-value of the node, that is, the concatenation of the character content of all descendent elements and text nodes.
CharSequence	getStringValueCS() Get the value of the item as a CharSequence.
String	getSystemId() Get the system id of this root node
String[]	getUnparsedEntity(String name) Get the unparsed entity with a given name
Iterator<String>	getUnparsedEntityNames() Get the list of unparsed entities defined in this document
Object	getUserData(String key) Get user data held in the document node.
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 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
boolean	isTyped() Ask whether the document contains any nodes whose type annotation is anything other than UNTYPED
protected AxisIterator	iterateChildren(NodeTest test) Get an enumeration of the children of this node
Builder	newBuilder() Get a Builder suitable for building nodes that can be attached to this document.
protected void	registerID(NodeInfo e, 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(CharSequence stringValue) Replace the string-value of this node
void	resetIndexes() This method is called before performing a batch of updates; it allows all cached data that might be invalidated by such updates to be cleared
NodeInfo	selectID(String id, boolean getParent) Get the element with a given ID.
void	setBaseURI(String uri) Set the base URI of this document node
protected void	setChildren(Object children) Set the children of this node
void	setConfiguration(Configuration config) Set the Configuration that contains this document
void	setDocumentElement(ElementImpl e) Set the top-level element of the document (variously called the root element or the document element).
void	setImaginary(boolean imaginary) Set whether this is an imaginary document node
void	setLineNumbering() Set line numbering on
protected void	setRawSequenceNumber(int seq)
void	setSystemId(String uri) Set the system id (base URI) of this node
void	setUnparsedEntity(String name, String uri, String publicId) Set an unparsed entity URI associated with this document.
void	setUserData(String key, Object value) Set user data on the document node.

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

addAttribute, addNamespace, atomize, compareOrder, comparePosition, delete, equals, getAttributeValue, getAttributeValue, getColumnNumber, getDeclaredNamespaces, getDisplayName, getFingerprint, getLocalPart, getNameCode, getNextInDocument, getNodeName, getParent, getPrefix, getPreviousInDocument, getPublicId, getRawParent, getSiblingPosition, getSuccessorElement, getTreeInfo, getURI, head, insertSiblings, isDeleted, isId, isIdref, isNilled, isSameNodeInfo, iterate, iterateAxis, iterateAxis, removeAttribute, removeTypeAnnotation, rename, replace, saveLocation, setRawParent, setSiblingPosition, setTypeAnnotation

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

hashCode

Constructor Detail

DocumentImpl

public DocumentImpl()

Create a DocumentImpl

Method Detail

getRootNode

public NodeInfo getRootNode()

Get the NodeInfo object representing the document node at the root of the tree

Specified by:

getRootNode in interface TreeInfo

Returns:

the document node

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 FingerprintedNode

Specified by:

getConfiguration in interface NodeInfo

Specified by:

getConfiguration in interface TreeInfo

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 FingerprintedNode

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

isTyped

public boolean isTyped()

Ask whether the document contains any nodes whose type annotation is anything other than UNTYPED

Specified by:

isTyped in interface TreeInfo

Returns:

true if the document contains elements whose type is other than UNTYPED

getDocumentNumber

public long getDocumentNumber()

Get the unique document number

Specified by:

getDocumentNumber in interface TreeInfo

Returns:

the document number

setDocumentElement

public void setDocumentElement(ElementImpl e)

Set the top-level element of the document (variously called the root element or the document element). Note that a DocumentImpl may represent the root of a result tree fragment, in which case there is no document element.

Parameters:

e - the top-level element

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(String uri)

Set the system id (base URI) of this node

Specified by:

setSystemId in interface Source

Overrides:

setSystemId in class NodeImpl

getSystemId

public String getSystemId()

Get the system id of this root node

Specified by:

getSystemId in interface Source

Specified by:

getSystemId in interface SourceLocator

Specified by:

getSystemId in interface Location

Specified by:

getSystemId in interface NodeInfo

Specified by:

getSystemId in interface Locator

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(String uri)

Set the base URI of this document node

Parameters:

uri - the new base URI

getBaseURI

public 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

addNilledElement

public void addNilledElement(ElementImpl element)

Add a nilled element. Nilled elements are unusual, so we avoid allocating a boolean in the element node; instead we keep a list of nilled elements at the document level

Parameters:

element - a nilled element

getLineNumber

public int getLineNumber()

Get the line number of this root node.

Specified by:

getLineNumber in interface SourceLocator

Specified by:

getLineNumber in interface Location

Specified by:

getLineNumber in interface NodeInfo

Specified by:

getLineNumber in interface Locator

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 NodeImpl getNextSibling()

Get next sibling - always null

Specified by:

getNextSibling in interface SteppingNode<NodeImpl>

Overrides:

getNextSibling in class NodeImpl

Returns:

null

getPreviousSibling

public final NodeImpl getPreviousSibling()

Get previous sibling - always null

Specified by:

getPreviousSibling in interface SteppingNode<NodeImpl>

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. May return null if the document node contains no element node.

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

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,
              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(String id,
                boolean getParent)

Get the element with a given ID.

Specified by:

selectID in interface TreeInfo

Parameters:

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

getParent - true if the requirement is for the parent of the node with the given ID, not the node itself.

Returns:

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

deregisterID

protected void deregisterID(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

setUnparsedEntity

public void setUnparsedEntity(String name,
                     String uri,
                     String publicId)

Set an unparsed entity URI associated with this document. For system use only, while building the document.

Parameters:

name - the entity name

uri - the system identifier of the unparsed entity

publicId - the public identifier of the unparsed entity

getUnparsedEntityNames

public Iterator<String> getUnparsedEntityNames()

Get the list of unparsed entities defined in this document

Specified by:

getUnparsedEntityNames in interface TreeInfo

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 String[] getUnparsedEntity(String name)

Get the unparsed entity with a given name

Specified by:

getUnparsedEntity in interface TreeInfo

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.

getSchemaType

public SchemaType getSchemaType()

Get the type annotation

Specified by:

getSchemaType in interface NodeInfo

Overrides:

getSchemaType in class NodeImpl

Returns:

the type annotation of the base node

copy

public void copy(Receiver out,
        int copyOptions,
        Location 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.

copyOptions - a selection of the options defined in CopyOptions

locationId - If non-null, identifies the location of the instruction that requested this copy. If zero, indicates that the location information is not available

Throws:

XPathException - if any downstream error occurs

replaceStringValue

public void replaceStringValue(CharSequence stringValue)

Replace the string-value of this node

Specified by:

replaceStringValue in interface MutableNodeInfo

Parameters:

stringValue - the new string value

resetIndexes

public void resetIndexes()

This method is called before performing a batch of updates; it allows all cached data that might be invalidated by such updates to be cleared

Specified by:

resetIndexes in interface MutableDocumentInfo

setUserData

public void setUserData(String key,
               Object value)

Set user data on the document node. The user data can be retrieved subsequently using getUserData(java.lang.String)

Specified by:

setUserData in interface TreeInfo

Parameters:

key - A string giving the name of the property to be set. Clients are responsible for choosing a key that is likely to be unique. Must not be null. Keys used internally by Saxon are prefixed "saxon:".

value - The value to be set for the property. May be null, which effectively removes the existing value for the property.

getUserData

public Object getUserData(String key)

Get user data held in the document node. This retrieves properties previously set using setUserData(java.lang.String, java.lang.Object)

Specified by:

getUserData in interface TreeInfo

Parameters:

key - A string giving the name of the property to be retrieved.

Returns:

the value of the property, or null if the property has not been defined.

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.

getRawSequenceNumber

protected final int getRawSequenceNumber()

setRawSequenceNumber

protected final void setRawSequenceNumber(int seq)

setChildren

protected final void setChildren(Object children)

Set the children of this node

Parameters:

children - null if there are no children, a single NodeInfo if there is one child, an array of NodeInfo if there are multiple children

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 final int getNumberOfChildren()

Determine how many children the node has

Returns:

the number of children of this parent node

iterateChildren

protected final AxisIterator iterateChildren(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 NodeImpl getFirstChild()

Get the first child node of the element

Specified by:

getFirstChild in interface SteppingNode<NodeImpl>

Overrides:

getFirstChild in class NodeImpl

Returns:

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

getLastChild

public final NodeImpl 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 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 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

Overrides:

getStringValueCS in class NodeImpl

Returns:

the string value of the item

See Also:

Item.getStringValue()

addChild

protected 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. This must be an instance of NodeImpl. It will be modified as a result of this call (by setting its parent property and sibling position)

index - the position where the child is to be added

insertChildren

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

Insert 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 form the new children. Adjacent text nodes will be merged, and zero-length text nodes removed. The supplied nodes may be modified in situ, for example to change their parent property and to add namespace bindings, or they may be copied, at the discretion of the implementation.

Specified by:

insertChildren in interface MutableNodeInfo

Overrides:

insertChildren in class NodeImpl

Parameters:

source - the nodes to be inserted. The implementation determines what implementation classes of node it will accept; this implementation will accept text, comment, and processing instruction nodes belonging to any implementation, but elements must be instances of ElementImpl. The supplied nodes will be modified in situ, for example to change their parent property and to add namespace bindings, if they are instances of ElementImpl; otherwise they will be copied. If the nodes are copied, then on return the supplied source array will contain the copy rather than the original.

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

inherit - true if the inserted nodes are to inherit the namespaces of their new parent; false if such namespaces are to be undeclared

Throws:

IllegalArgumentException - if the supplied nodes use a node implementation that this implementation does not accept.

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. We allow any kind of text, comment, or processing instruction node, but element nodes must be instances of this NodeInfo implementation.

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:

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