net.sf.saxon.om
Class StrippedNode

java.lang.Object
  |
  +--net.sf.saxon.om.StrippedNode
All Implemented Interfaces:
Item, NodeInfo, javax.xml.transform.Source, VirtualNode
Direct Known Subclasses:
StrippedDocument

public class StrippedNode
extends java.lang.Object
implements NodeInfo, VirtualNode

A StrippedNode is a view of a node, in a virtual tree that has whitespace text nodes stripped from it. All operations on the node produce the same result as operations on the real underlying node, except that iterations over the axes take care to skip whitespace-only text nodes that are supposed to be stripped. Note that this class is only used in cases where a pre-built tree is supplied as the input to a transformation, and where the stylesheet does whitespace stripping; if a SAXSource or StreamSource is supplied, whitespace is stripped as the tree is built.


Field Summary
protected  StrippedDocument docWrapper
           
protected  NodeInfo node
           
protected  StrippedNode parent
           
 
Fields inherited from interface net.sf.saxon.om.NodeInfo
ALL_NAMESPACES, LOCAL_NAMESPACES, NO_NAMESPACES
 
Constructor Summary
protected StrippedNode()
           
protected StrippedNode(NodeInfo node, StrippedNode parent)
          This constructor is protected: nodes should be created using the makeWrapper factory method
 
Method Summary
 int compareOrder(NodeInfo other)
          Determine the relative position of this node and another node, in document order.
 void copy(Receiver out, int whichNamespaces, boolean copyAnnotations)
          Copy this node to a given outputter (deep copy)
 java.lang.String generateId()
          Get a character string that uniquely identifies this node.
 java.lang.String getAttributeValue(int fingerprint)
          Get the 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.
 java.lang.String getDisplayName()
          Get the display name of this node.
 int getDocumentNumber()
          Get the document number of the document containing this node.
 DocumentInfo getDocumentRoot()
          Get the root (document) node
 int getFingerprint()
          Get fingerprint.
 int getLineNumber()
          Get line number
 java.lang.String getLocalPart()
          Get the local part of the name of this node.
 int getNameCode()
          Get name code.
 NamePool getNamePool()
          Get the name pool for this node
 int getNodeKind()
          Return the type of node.
 NodeInfo getParent()
          Get the NodeInfo object representing the parent of this node
 NodeInfo getRoot()
          Get the root node - always a document node with this tree implementation
 java.lang.String getStringValue()
          Return the string value of the node.
 java.lang.String getSystemId()
          Get the System ID for the node.
 int getTypeAnnotation()
          Get the type annotation
 SequenceIterator getTypedValue(Configuration config)
          Get the typed value of the item
 java.lang.Object getUnderlyingNode()
          Get the underlying DOM node, to implement the VirtualNode interface
 java.lang.String getURI()
          Get the URI part of the name of this node.
 boolean hasChildNodes()
          Determine whether the node has any children.
 boolean isSameNode(NodeInfo other)
          Determine whether this is the same node as another node.
 AxisIterator iterateAxis(byte axisNumber)
          Return an iteration over the nodes reached by the given axis from this node
 AxisIterator iterateAxis(byte axisNumber, NodeTest nodeTest)
          Return an iteration over the nodes reached by the given axis from this node
protected  StrippedNode makeWrapper(NodeInfo node, StrippedDocument docWrapper, StrippedNode parent)
          Factory method to wrap a node with a wrapper that implements the Saxon NodeInfo interface.
 void outputNamespaceNodes(Receiver out, boolean includeAncestors)
          Output all namespace nodes associated with this element.
 void setSystemId(java.lang.String uri)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

node

protected NodeInfo node

parent

protected StrippedNode parent

docWrapper

protected StrippedDocument docWrapper
Constructor Detail

StrippedNode

protected StrippedNode()

StrippedNode

protected StrippedNode(NodeInfo node,
                       StrippedNode parent)
This constructor is protected: nodes should be created using the makeWrapper factory method

Parameters:
node - The node to be wrapped
parent - The StrippedNode that wraps the parent of this node
Method Detail

makeWrapper

protected StrippedNode makeWrapper(NodeInfo node,
                                   StrippedDocument docWrapper,
                                   StrippedNode parent)
Factory method to wrap a node with a wrapper that implements the Saxon NodeInfo interface.

Parameters:
node - The underlying node
docWrapper - The wrapper for the document node (must be supplied)
parent - The wrapper for the parent of the node (null if unknown)
Returns:
The new wrapper for the supplied node

getUnderlyingNode

public java.lang.Object getUnderlyingNode()
Get the underlying DOM node, to implement the VirtualNode interface

Specified by:
getUnderlyingNode in interface VirtualNode
Returns:
The underlying node. Note that this may itself be a VirtualNode; you may have to drill down through several layers of wrapping.

getNamePool

public NamePool getNamePool()
Get the name pool for this node

Specified by:
getNamePool in interface NodeInfo
Returns:
the NamePool

getNodeKind

public int getNodeKind()
Return the type of node.

Specified by:
getNodeKind in interface NodeInfo
Returns:
one of the values Node.ELEMENT, Node.TEXT, Node.ATTRIBUTE, etc.
See Also:
Type

getTypedValue

public SequenceIterator getTypedValue(Configuration config)
                               throws XPathException
Get the typed value of the item

Specified by:
getTypedValue in interface Item
Parameters:
config - the configuration: this is needed because it provides access to schema information needed to interpret the type annotation
Returns:
the typed value of the item. In general this will be a sequence
Throws:
XPathException - where no typed value is available, e.g. for an element with complex content

getTypeAnnotation

public int getTypeAnnotation()
Get the type annotation

Specified by:
getTypeAnnotation in interface NodeInfo
Returns:
0 (there is no type annotation)
See Also:
Type

isSameNode

public boolean isSameNode(NodeInfo other)
Determine whether this is the same node as another node.
Note: a.isSameNode(b) if and only if generateId(a)==generateId(b)

Specified by:
isSameNode in interface NodeInfo
Parameters:
other - the node to be compared with this node
Returns:
true if this Node object and the supplied Node object represent the same node in the tree.

getSystemId

public java.lang.String getSystemId()
Get the System ID for the node.

Specified by:
getSystemId in interface NodeInfo
Returns:
the System Identifier of the entity in the source document containing the node, or null if not known. Note this is not the same as the base URI: the base URI can be modified by xml:base, but the system ID cannot.

setSystemId

public void setSystemId(java.lang.String uri)
Specified by:
setSystemId in interface javax.xml.transform.Source

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. In the JDOM model, base URIs are held only an the document level. We don't currently take any account of xml:base attributes.

Specified by:
getBaseURI in interface NodeInfo
Returns:
the base URI of the node

getLineNumber

public int getLineNumber()
Get line number

Specified by:
getLineNumber in interface NodeInfo
Returns:
the line number of the node in its original source document; or -1 if not available

compareOrder

public int compareOrder(NodeInfo other)
Determine the relative position of this node and another node, in document order. The other node will always be in the same document.

Specified by:
compareOrder in interface NodeInfo
Parameters:
other - The other node, whose position is to be compared with this node
Returns:
-1 if this node precedes the other node, +1 if it follows the other node, or 0 if they are the same node. (In this case, isSameNode() will always return true, and the two nodes will produce the same result for generateId())

getStringValue

public java.lang.String getStringValue()
Return the string value of the node. 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.

Specified by:
getStringValue in interface NodeInfo
Returns:
the string value of the node

getNameCode

public int getNameCode()
Get name code. The name code is a coded form of the node name: two nodes with the same name code have the same namespace URI, the same local name, and the same prefix. By masking the name code with &0xfffff, you get a fingerprint: two nodes with the same fingerprint have the same local name and namespace URI.

Specified by:
getNameCode in interface NodeInfo
Returns:
an integer name code, which may be used to obtain the actual node name from the name pool
See Also:
allocate

getFingerprint

public 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. A fingerprint of -1 should be returned for a node with no name.

Specified by:
getFingerprint in interface NodeInfo
Returns:
an integer fingerprint; two nodes with the same fingerprint have the same expanded QName

getLocalPart

public 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 null, except for un unnamed namespace node, which returns "".

getURI

public 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, return null. For a node with an empty prefix, return an empty string.

getDisplayName

public java.lang.String getDisplayName()
Get the display name of this node. For elements and attributes this is [prefix:]localname. For unnamed nodes, it is an empty string.

Specified by:
getDisplayName in interface NodeInfo
Returns:
The display name of this node. For a node with no name, return an empty string.

getParent

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

Specified by:
iterateAxis in interface NodeInfo
Parameters:
axisNumber - the axis to be used
Returns:
a SequenceIterator that scans the nodes reached by the axis in turn.
See Also:
Axis

iterateAxis

public AxisIterator iterateAxis(byte axisNumber,
                                NodeTest nodeTest)
Return an iteration over the nodes reached by the given axis from this node

Specified by:
iterateAxis in interface NodeInfo
Parameters:
axisNumber - the axis to be used
nodeTest - A pattern to be matched by the returned nodes
Returns:
a SequenceIterator that scans the nodes reached by the axis in turn.
See Also:
Axis

getAttributeValue

public java.lang.String getAttributeValue(int fingerprint)
Get the value of a given attribute of this node

Specified by:
getAttributeValue in interface NodeInfo
Parameters:
fingerprint - The fingerprint of the attribute name
Returns:
the attribute value if it exists or null if not

getRoot

public NodeInfo getRoot()
Get the root node - always a document node with this tree implementation

Specified by:
getRoot in interface NodeInfo
Returns:
the NodeInfo representing the containing document

getDocumentRoot

public DocumentInfo getDocumentRoot()
Get the root (document) node

Specified by:
getDocumentRoot in interface NodeInfo
Returns:
the DocumentInfo representing the containing document

hasChildNodes

public boolean hasChildNodes()
Determine whether the node has any children.
Note: the result is equivalent to
getEnumeration(Axis.CHILD, AnyNodeTest.getInstance()).hasNext()

Specified by:
hasChildNodes in interface NodeInfo
Returns:
True if the node has one or more children

generateId

public java.lang.String generateId()
Get a character string that uniquely identifies this node. Note: a.isSameNode(b) if and only if generateId(a)==generateId(b)

Specified by:
generateId in interface NodeInfo
Returns:
a string that uniquely identifies this node, within this document. The calling code prepends information to make the result unique across all documents.

getDocumentNumber

public int getDocumentNumber()
Get the document number of the document containing this node. For a free-standing orphan node, just return the hashcode.

Specified by:
getDocumentNumber in interface NodeInfo

copy

public void copy(Receiver out,
                 int whichNamespaces,
                 boolean copyAnnotations)
          throws javax.xml.transform.TransformerException
Copy this node to a given outputter (deep copy)

Specified by:
copy in interface NodeInfo
Parameters:
out - the Receiver to which the node should be copied
whichNamespaces - in the case of an element, controls which namespace nodes should be copied. Values are NO_NAMESPACES, LOCAL_NAMESPACES, ALL_NAMESPACES
copyAnnotations - indicates whether the type annotations of element and attribute nodes should be copied
Throws:
javax.xml.transform.TransformerException

outputNamespaceNodes

public void outputNamespaceNodes(Receiver out,
                                 boolean includeAncestors)
                          throws javax.xml.transform.TransformerException
Output all namespace nodes associated with this element. Does nothing if the node is not an element.

Specified by:
outputNamespaceNodes in interface NodeInfo
Parameters:
out - The relevant outputter
includeAncestors - True if namespaces declared on ancestor elements must be output; false if it is known that these are already on the result tree
javax.xml.transform.TransformerException