net.sf.saxon.expr
Class PathMap.PathMapNode

java.lang.Object
  net.sf.saxon.expr.PathMap.PathMapNode

Direct Known Subclasses:

PathMap.PathMapRoot

Enclosing class:

PathMap

public static class PathMap.PathMapNode
extends Object

A node in the path map. A node holds a set of arcs, each representing a link to another node in the path map.

Method Summary

boolean	allPathsAreWithinStreamableSnapshot() Determine whether the path is entirely within a streamable snapshot of a streamed document: that is, it must only navigate to ancestors and to attributes of ancestors
PathMap.PathMapNode	createArc(AxisExpression step) Create a new arc
void	createArc(AxisExpression step, PathMap.PathMapNode target) Create a new arc to an existing target
PathMap.PathMapArc[]	getArcs() Get the arcs emanating from this node in the PathMap
boolean	hasReachableReturnables() Test whether there are any returnable nodes reachable from this node by zero or more arcs
boolean	hasUnknownDependencies() Ask whether the path has unknown dependencies, typically because a node reached by the path is supplied as an argument to a user-defined function
boolean	isAtomized() Ask whether the typed value (or string value) of the node reached by this path will be required.
boolean	isReturnable() Ask whether the node represents a value that is returnable as the result of the supplied expression, rather than merely a node that is visited en route
void	setAtomized() Indicate that the typed value or string value of the node reached by this path will be used.
void	setHasUnknownDependencies() Indicate that the path has unknown dependencies, typically because a node reached by the path is supplied as an argument to a user-defined function
void	setReturnable(boolean returnable) Indicate that the node represents a value that is returnable as the result of the supplied expression, rather than merely a node that is visited en route

Methods inherited from class java.lang.Object

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

Method Detail

createArc

public PathMap.PathMapNode createArc(AxisExpression step)

Create a new arc

Parameters:

step - the AxisExpression representing this step

Returns:

the newly-constructed target of the new arc

createArc

public void createArc(AxisExpression step,
                      PathMap.PathMapNode target)

Create a new arc to an existing target

Parameters:

step - the AxisExpression representing this step

target - the target node of the new arc

getArcs

public PathMap.PathMapArc[] getArcs()

Get the arcs emanating from this node in the PathMap

Returns:

the arcs, each representing an AxisStep. The order of arcs in the array is undefined.

setReturnable

public void setReturnable(boolean returnable)

Indicate that the node represents a value that is returnable as the result of the supplied expression, rather than merely a node that is visited en route

Parameters:

returnable - true if the node represents a final result of the expression

isReturnable

public boolean isReturnable()

Ask whether the node represents a value that is returnable as the result of the supplied expression, rather than merely a node that is visited en route

Returns:

true if the node represents a final result of the expression

hasReachableReturnables

public boolean hasReachableReturnables()

Test whether there are any returnable nodes reachable from this node by zero or more arcs

setAtomized

public void setAtomized()

Indicate that the typed value or string value of the node reached by this path will be used. Note that because this is being used only to determine navigation paths, the property does not need to be set when nodes other than element or document nodes are atomized.

isAtomized

public boolean isAtomized()

Ask whether the typed value (or string value) of the node reached by this path will be required.

Returns:

true if the typed value or string value of the node is required

setHasUnknownDependencies

public void setHasUnknownDependencies()

Indicate that the path has unknown dependencies, typically because a node reached by the path is supplied as an argument to a user-defined function

hasUnknownDependencies

public boolean hasUnknownDependencies()

Ask whether the path has unknown dependencies, typically because a node reached by the path is supplied as an argument to a user-defined function

Returns:

true if the path has unknown dependencies

allPathsAreWithinStreamableSnapshot

public boolean allPathsAreWithinStreamableSnapshot()

Determine whether the path is entirely within a streamable snapshot of a streamed document: that is, it must only navigate to ancestors and to attributes of ancestors