net.sf.saxon.tree.linked

Class ElementImpl

java.lang.Object

net.sf.saxon.tree.linked.NodeImpl

net.sf.saxon.tree.linked.ElementImpl

All Implemented Interfaces:

javax.xml.transform.Source, javax.xml.transform.SourceLocator, Location, Item, MutableNodeInfo, NamespaceResolver, NodeInfo, Sequence, SteppingNode<NodeImpl>, SiblingCountingNode, org.xml.sax.Locator

Direct Known Subclasses:

DataElement, SchemaElement, StyleElement

public class ElementImpl
extends NodeImpl
implements NamespaceResolver

ElementImpl implements an element node in the Linked tree model. Subclasses of ElementImpl, for holding particular kinds of element, can be defined by using a NodeFactory registered with the LinkedTreeBuilder used to construct the tree.

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
ElementImpl() Construct an empty ElementImpl

Method Summary

Modifier and Type	Method and Description
void	addAttribute(NodeName nameCode, SimpleType attType, java.lang.CharSequence value, int properties) Add an attribute to this element node.
protected void	addChild(NodeImpl node, int index) Add a child node to this node.
void	addNamespace(NamespaceBinding nscode, boolean inherit) Add a namespace binding (that is, a namespace node) to this element.
void	compact(int size) Compact the space used by this node
void	copy(Receiver out, int copyOptions, Location location) Copy this node to a given Receiver.
void	delete() Delete this node (that is, detach it from its parent)
protected void	fixupInsertedNamespaces(boolean inherit) Ensure that a child element being inserted into a tree has the right namespace declarations.
void	generateId(FastStringBuffer buffer) Get a character string that uniquely identifies this node
AttributeCollection	getAttributeList() Get the attribute list for this element.
java.lang.String	getAttributeValue(java.lang.String uri, java.lang.String localName) Get the value of a given attribute of this node
java.lang.String	getBaseURI() Get the base URI of this element node.
int	getColumnNumber() Get the line number of the node within its source document entity
NamespaceBinding[]	getDeclaredNamespaces(NamespaceBinding[] buffer) Get all namespace undeclarations and undeclarations defined on this element.
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 the node within its source document entity
NamespaceBinding[]	getNamespaceList() Get the namespace list for this element.
int	getNodeKind() Return the kind of node.
NodeName	getNodeName() Get the name of the 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
protected int	getRawSequenceNumber()
NodeInfo	getRoot() Get the root node
SchemaType	getSchemaType() Get the type annotation
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 the entity containing this element node.
java.lang.String	getURIForPrefix(java.lang.String prefix, boolean useDefault) Get the namespace URI corresponding to a given prefix.
AttributeCollection	gsetAttributeCollection() Get the attribute list.
boolean	hasChildNodes() Determine if the node has any children.
void	initialise(NodeName elemName, SchemaType elementType, AttributeCollectionImpl atts, NodeInfo parent, int sequenceNumber) Initialise a new ElementImpl with an element name
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	isId() Determine whether this node has the is-id property
boolean	isInScopeNamespace(java.lang.String uri) Search the in-scope namespaces to see whether a given namespace is in scope.
boolean	isNilled() Determine whether the node has the is-nilled property
protected AxisIterator	iterateChildren(NodeTest test) Get an enumeration of the children of this node
java.util.Iterator<java.lang.String>	iteratePrefixes() Get an iterator over all the prefixes declared in this namespace context.
void	removeAttribute(NodeInfo attribute) Remove an attribute from this element node
protected void	removeChild(NodeImpl child) Remove a given child
void	removeTypeAnnotation() Remove type information from this node (and its ancestors, recursively).
void	rename(NodeName newName) Rename this node
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
void	setAttributeList(AttributeCollection atts) Set the attribute list
protected void	setChildren(java.lang.Object children) Set the children of this node
void	setLocation(java.lang.String systemId, int line, int column) Set location information for this node
void	setNamespaceDeclarations(NamespaceBinding[] namespaces, int namespacesUsed) Set the namespace declarations for the element
void	setNamespaceList(NamespaceBinding[] namespaces) Set the namespace list
void	setNilled() Say that the element has the nilled property
void	setNodeName(NodeName name) Set the node name
protected void	setRawSequenceNumber(int seq)
void	setSystemId(java.lang.String uri) Set the system ID of this node.
void	setTypeAnnotation(SchemaType type) Set the type annotation on a node.

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

atomize, compareOrder, comparePosition, equals, getConfiguration, getDisplayName, getFingerprint, getLocalPart, getNamePool, getNextInDocument, getNextSibling, getParent, getPhysicalRoot, getPrefix, getPreviousInDocument, getPreviousSibling, getPublicId, getRawParent, getSiblingPosition, getSuccessorElement, getTreeInfo, getURI, hasFingerprint, head, insertSiblings, isDeleted, isIdref, isSameNodeInfo, isStreamed, iterate, iterateAxis, iterateAxis, newBuilder, replace, saveLocation, setRawParent, setSiblingPosition

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

ElementImpl

public ElementImpl()

Construct an empty ElementImpl

Method Detail

setAttributeList

public void setAttributeList(AttributeCollection atts)

Set the attribute list

Parameters:

atts - the list of attributes of this element (not including namespace attributes)

setNamespaceList

public void setNamespaceList(NamespaceBinding[] namespaces)

Set the namespace list

Parameters:

namespaces - an integer array of namespace codes

setNodeName

public void setNodeName(NodeName name)

Set the node name

Parameters:

name - the node name

initialise

public void initialise(NodeName elemName,
                       SchemaType elementType,
                       AttributeCollectionImpl atts,
                       NodeInfo parent,
                       int sequenceNumber)

Initialise a new ElementImpl with an element name

Parameters:

elemName - Integer representing the element name, with namespaces resolved

elementType - the schema type of the element node

atts - The attribute list: always null

parent - The parent node

sequenceNumber - Integer identifying this element within the document

getNodeName

public NodeName getNodeName()

Get the name of the node. Returns null for an unnamed node

Overrides:

getNodeName in class NodeImpl

Returns:

the name of the node

setLocation

public void setLocation(java.lang.String systemId,
                        int line,
                        int column)

Set location information for this node

Parameters:

systemId - the base URI

line - the line number if known

column - the column number if known

setSystemId

public void setSystemId(java.lang.String uri)

Set the system ID of this node. This method is provided so that a NodeInfo implements the javax.xml.transform.Source interface, allowing a node to be used directly as the Source of a transformation

Specified by:

setSystemId in interface javax.xml.transform.Source

Overrides:

setSystemId in class NodeImpl

getRoot

public NodeInfo getRoot()

Get the root node

Specified by:

getRoot in interface NodeInfo

Overrides:

getRoot in class NodeImpl

Returns:

the NodeInfo representing the logical root of the tree. For this tree implementation the root will either be a document node or an element node.

getSystemId

public final java.lang.String getSystemId()

Get the system ID of the entity containing this element node.

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

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.

getBaseURI

public java.lang.String getBaseURI()

Get the base URI of this element node. This will be the same as the System ID unless xml:base has been used.

Specified by:

getBaseURI in interface NodeInfo

Overrides:

getBaseURI in class NodeImpl

Returns:

the base URI of the node. This may be null if the base URI is unknown, including the case where the node has no parent.

gsetAttributeCollection

public AttributeCollection gsetAttributeCollection()

Get the attribute list. Note that if the attribute list is empty, it should not be modified, as it will be shared by other elements. Instead, set a new attribute list.

Returns:

the list of attributes of this element (not including namespace attributes)

isNilled

public boolean isNilled()

Determine whether the node has the is-nilled property

Specified by:

isNilled in interface NodeInfo

Overrides:

isNilled in class NodeImpl

Returns:

true if the node has the is-nilled property

setTypeAnnotation

public void setTypeAnnotation(SchemaType type)

Set the type annotation on a node. This must only be called when the caller has verified (by validation) that the node is a valid instance of the specified type. The call is ignored if the node is not an element or attribute node.

Specified by:

setTypeAnnotation in interface MutableNodeInfo

Overrides:

setTypeAnnotation in class NodeImpl

Parameters:

type - the type annotation

setNilled

public void setNilled()

Say that the element has the nilled property

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 node

getLineNumber

public int getLineNumber()

Get the line number of the node within its source document entity

Specified by:

getLineNumber in interface javax.xml.transform.SourceLocator

Specified by:

getLineNumber in interface Location

Specified by:

getLineNumber in interface NodeInfo

Specified by:

getLineNumber in interface org.xml.sax.Locator

Overrides:

getLineNumber in class NodeImpl

Returns:

the line number of the node in its original source document; or -1 if not available

getColumnNumber

public int getColumnNumber()

Get the line number of the node within its source document entity

Specified by:

getColumnNumber in interface javax.xml.transform.SourceLocator

Specified by:

getColumnNumber in interface Location

Specified by:

getColumnNumber in interface NodeInfo

Specified by:

getColumnNumber in interface org.xml.sax.Locator

Overrides:

getColumnNumber in class NodeImpl

Returns:

the column number of the node in its original source document; or -1 if not available

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 - to contain the generated ID

getNodeKind

public final int getNodeKind()

Return the kind of node.

Specified by:

getNodeKind in interface NodeInfo

Returns:

Type.ELEMENT

See Also:

Type

copy

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

Copy this node to a given Receiver.

This method is primarily for internal use. It should not be considered a stable part of the Saxon API.

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

location - 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

delete

public void delete()

Delete this node (that is, detach it from its parent)

Specified by:

delete in interface MutableNodeInfo

Overrides:

delete in class NodeImpl

rename

public void rename(NodeName newName)

Rename this node

Specified by:

rename in interface MutableNodeInfo

Overrides:

rename in class NodeImpl

Parameters:

newName - the new name

addNamespace

public void addNamespace(NamespaceBinding nscode,
                         boolean inherit)

Add a namespace binding (that is, a namespace node) to this element. This call has no effect if applied to a node other than an element.

Specified by:

addNamespace in interface MutableNodeInfo

Overrides:

addNamespace in class NodeImpl

Parameters:

nscode - The namespace code representing the (prefix, uri) pair of the namespace binding to be added. If the target element already has a namespace binding with this (prefix, uri) pair, the call has no effect. If the target element currently has a namespace binding with this prefix and a different URI, an exception is raised.

inherit - If true, the new namespace binding will be inherited by any children of the target element that do not already have a namespace binding for the specified prefix, recursively. If false, the new namespace binding will not be inherited.

Throws:

java.lang.IllegalArgumentException - if the target element already has a namespace binding for this prefix, or if the namespace code represents a namespace undeclaration

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

addAttribute

public void addAttribute(NodeName nameCode,
                         SimpleType attType,
                         java.lang.CharSequence value,
                         int properties)

Add an attribute to this element node.

If this node is not an element, or if the supplied node is not an attribute, the method takes no action. If the element already has an attribute with this name, the method throws an exception.

This method does not perform any namespace fixup. It is the caller's responsibility to ensure that any namespace prefix used in the name of the attribute (or in its value if it has a namespace-sensitive type) is declared on this element.

Specified by:

addAttribute in interface MutableNodeInfo

Overrides:

addAttribute in class NodeImpl

Parameters:

nameCode - the name of the new attribute

attType - the type annotation of the new attribute

value - the string value of the new attribute

properties - properties including IS_ID and IS_IDREF properties

Throws:

java.lang.IllegalStateException - if the element already has an attribute with the given name.

removeAttribute

public void removeAttribute(NodeInfo attribute)

Remove an attribute from this element node

If this node is not an element, or if the specified node is not an attribute of this element, this method takes no action.

The attribute object itself becomes unusable; any attempt to use this attribute object, or any other object representing the same node, is likely to result in an exception.

Specified by:

removeAttribute in interface MutableNodeInfo

Overrides:

removeAttribute in class NodeImpl

Parameters:

attribute - the attribute node to be removed

removeTypeAnnotation

public void removeTypeAnnotation()

Remove type information from this node (and its ancestors, recursively). This method implements the upd:removeType() primitive defined in the XQuery Update specification

Specified by:

removeTypeAnnotation in interface MutableNodeInfo

Overrides:

removeTypeAnnotation in class NodeImpl

setNamespaceDeclarations

public void setNamespaceDeclarations(NamespaceBinding[] namespaces,
                                     int namespacesUsed)

Set the namespace declarations for the element

Parameters:

namespaces - the list of namespace codes

namespacesUsed - the number of entries in the list that are used

getURIForPrefix

public java.lang.String getURIForPrefix(java.lang.String prefix,
                                        boolean useDefault)

Get the namespace URI corresponding to a given prefix. Return null if the prefix is not in scope.

Specified by:

getURIForPrefix in interface NamespaceResolver

Parameters:

prefix - the namespace prefix. May be the zero-length string, indicating that there is no prefix. This indicates either the default namespace or the null namespace, depending on the value of useDefault.

useDefault - true if the default namespace is to be used when the prefix is "". If false, the method returns "" when the prefix is "".

Returns:

the uri for the namespace, or null if the prefix is not in scope. The "null namespace" is represented by the pseudo-URI "".

iteratePrefixes

public java.util.Iterator<java.lang.String> iteratePrefixes()

Get an iterator over all the prefixes declared in this namespace context. This will include the default namespace (prefix="") and the XML namespace where appropriate

Specified by:

iteratePrefixes in interface NamespaceResolver

Returns:

an iterator over all the prefixes for which a namespace binding exists, including the zero-length string to represent the null/absent prefix if it is bound

isInScopeNamespace

public boolean isInScopeNamespace(java.lang.String uri)

Search the in-scope namespaces to see whether a given namespace is in scope.

Parameters:

uri - The URI to be matched.

Returns:

true if the namespace is in scope

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 NodeImpl

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 NamespaceBinding objects representing the namespace declarations and undeclarations present on this element. For a node other than an element, return null. 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 null.

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

fixupInsertedNamespaces

protected void fixupInsertedNamespaces(boolean inherit)

Ensure that a child element being inserted into a tree has the right namespace declarations. Redundant declarations should be removed. If the child is in the null namespace but the parent has a default namespace, xmlns="" should be added. If inherit is false, namespace undeclarations should be added for all namespaces that are declared on the parent but not on the child.

Parameters:

inherit - true if the child is to inherit the inscope namespaces of its new parent

getAttributeList

public AttributeCollection getAttributeList()

Get the attribute list for this element.

Returns:

The attribute list. This will not include any namespace attributes. The attribute names will be in expanded form, with prefixes replaced by URIs

getNamespaceList

public NamespaceBinding[] getNamespaceList()

Get the namespace list for this element.

Returns:

The raw namespace list, as an array of name codes

getAttributeValue

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

Get the value of a given attribute of this node

Specified by:

getAttributeValue in interface NodeInfo

Overrides:

getAttributeValue in class NodeImpl

Parameters:

uri - the namespace URI of the attribute name, or "" if the attribute is not in a namepsace

localName - the local part of the attribute name

Returns:

the attribute value if it exists or null if not

isId

public boolean isId()

Determine whether this node has the is-id property

Specified by:

isId in interface NodeInfo

Overrides:

isId in class NodeImpl

Returns:

true if the node is an ID

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(java.lang.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 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

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:

java.lang.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:

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