net.sf.saxon.tree.wrapper
Class SpaceStrippedNode

java.lang.Object
  net.sf.saxon.tree.wrapper.AbstractVirtualNode
      net.sf.saxon.tree.wrapper.SpaceStrippedNode

All Implemented Interfaces:

Source, PullEvent, Item<NodeInfo>, NodeInfo, ValueRepresentation<NodeInfo>, VirtualNode, WrappingFunction

Direct Known Subclasses:

SpaceStrippedDocument

public class SpaceStrippedNode
extends AbstractVirtualNode
implements WrappingFunction

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

Fields inherited from class net.sf.saxon.tree.wrapper.AbstractVirtualNode

docWrapper, node, parent

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

ALL_NAMESPACES, IS_DTD_TYPE, IS_NILLED, LOCAL_NAMESPACES, NO_NAMESPACES

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

EMPTY_VALUE_ARRAY

Constructor Summary

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

Method Summary

Value	atomize() Get the typed value.
int	compareOrder(NodeInfo other) Determine the relative position of this node and another node, in document order.
void	copy(Receiver out, int copyOptions, int locationId) Copy this node to a given outputter (deep copy)
NodeInfo	getParent() Get the NodeInfo object representing the parent of this node
CharSequence	getStringValueCS() Get the value of the item as a CharSequence.
boolean	isSameNodeInfo(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
protected static SpaceStrippedNode	makeWrapper(NodeInfo node, SpaceStrippedDocument docWrapper, SpaceStrippedNode parent) Factory method to wrap a node with a wrapper that implements the Saxon NodeInfo interface.
VirtualNode	makeWrapper(NodeInfo node, VirtualNode parent) Factory method to wrap a node within the same document as this node with a VirtualNode

Methods inherited from class net.sf.saxon.tree.wrapper.AbstractVirtualNode

equals, generateId, getAttributeValue, getAttributeValue, getBaseURI, getColumnNumber, getConfiguration, getDeclaredNamespaces, getDisplayName, getDocumentNumber, getDocumentRoot, getFingerprint, getLineNumber, getLocalPart, getNameCode, getNamePool, getNodeKind, getPrefix, getRealNode, getRoot, getSchemaType, getStringValue, getSystemId, getTypeAnnotation, getTypedValue, getUnderlyingNode, getURI, hasChildNodes, hashCode, isId, isIdref, isNilled, iterateAxis, setSystemId

Methods inherited from class java.lang.Object

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

Constructor Detail

SpaceStrippedNode

protected SpaceStrippedNode()

SpaceStrippedNode

protected SpaceStrippedNode(NodeInfo node,
                            SpaceStrippedNode 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 static SpaceStrippedNode makeWrapper(NodeInfo node,
                                               SpaceStrippedDocument docWrapper,
                                               SpaceStrippedNode 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

makeWrapper

public VirtualNode makeWrapper(NodeInfo node,
                               VirtualNode parent)

Factory method to wrap a node within the same document as this node with a VirtualNode

Specified by:

makeWrapper in interface WrappingFunction

Parameters:

node - The underlying node

parent - The wrapper for the parent of the node (null if unknown)

Returns:

The new wrapper for the supplied node

atomize

public Value atomize()
              throws XPathException

Get the typed value. The result of this method will always be consistent with the method Item.getTypedValue(). However, this method is often more convenient and may be more efficient, especially in the common case where the value is expected to be a singleton.

Specified by:

atomize in interface NodeInfo

Overrides:

atomize in class AbstractVirtualNode

Returns:

the typed value. If requireSingleton is set to true, the result will always be an AtomicValue. In other cases it may be a Value representing a sequence 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

Since:

8.5

isSameNodeInfo

public boolean isSameNodeInfo(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:

isSameNodeInfo in interface NodeInfo

Overrides:

isSameNodeInfo in class AbstractVirtualNode

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.

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

Overrides:

compareOrder in class AbstractVirtualNode

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())

getStringValueCS

public CharSequence getStringValueCS()

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<NodeInfo>

Specified by:

getStringValueCS in interface ValueRepresentation<NodeInfo>

Overrides:

getStringValueCS in class AbstractVirtualNode

Returns:

the string value of the item

See Also:

Item.getStringValue()

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

copy

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

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. 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-zero, identifies the location of the instruction that requested this copy. If zero, indicates that the location information

Throws:

XPathException - if any downstream error occurs