org.apache.commons.jxpath.ri.axes
Class InitialContext

java.lang.Object
  org.apache.commons.jxpath.ri.EvalContext
      org.apache.commons.jxpath.ri.axes.InitialContext

All Implemented Interfaces:

ExpressionContext, java.util.Iterator

public class InitialContext

extends EvalContext

A single-set EvalContext that provides access to the current node of the parent context and nothing else. It does not pass the iteration on to the parent context.

Version:

$Revision: 1.14 $ $Date: 2004/03/25 05:42:01 $

Author:

Dmitri Plotnikov

Field Summary

private boolean	collection
private NodePointer	nodePointer
private boolean	started
private boolean	startedSet

Fields inherited from class org.apache.commons.jxpath.ri.EvalContext

parentContext, position, rootContext

Constructor Summary

InitialContext(EvalContext parentContext)

Method Summary

NodePointer	getCurrentNodePointer() Returns the current context node.
Pointer	getSingleNodePointer() Returns the first encountered Pointer that matches the current context's criteria.
java.lang.Object	getValue() Typically returns the NodeSet by calling getNodeSet(), but will be overridden for contexts that more naturally produce individual values, e.g.
boolean	nextNode() Returns true if there is another object in the current set.
boolean	nextSet() Returns true if there is another sets of objects to interate over.
boolean	setPosition(int position) Moves the current position to the specified index.

Methods inherited from class org.apache.commons.jxpath.ri.EvalContext

getContextNodeList, getContextNodePointer, getCurrentPosition, getDocumentOrder, getJXPathContext, getNodeSet, getPosition, getRootContext, hasNext, isChildOrderingRequired, next, remove, reset, toString

Methods inherited from class java.lang.Object

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

Field Detail

startedSet

private boolean startedSet

started

private boolean started

collection

private boolean collection

nodePointer

private NodePointer nodePointer

Constructor Detail

InitialContext

public InitialContext(EvalContext parentContext)

Method Detail

getSingleNodePointer

public Pointer getSingleNodePointer()

Description copied from class: EvalContext

Returns the first encountered Pointer that matches the current context's criteria.

Overrides:

getSingleNodePointer in class EvalContext

getCurrentNodePointer

public NodePointer getCurrentNodePointer()

Description copied from class: EvalContext

Returns the current context node. Undefined before the beginning of the iteration.

Specified by:

getCurrentNodePointer in class EvalContext

getValue

public java.lang.Object getValue()

Description copied from class: EvalContext

Typically returns the NodeSet by calling getNodeSet(), but will be overridden for contexts that more naturally produce individual values, e.g. VariableContext

Overrides:

getValue in class EvalContext

nextNode

public boolean nextNode()

Description copied from class: EvalContext

Returns true if there is another object in the current set. Switches the current position and node to the next object.

Specified by:

nextNode in class EvalContext

setPosition

public boolean setPosition(int position)

Description copied from class: EvalContext

Moves the current position to the specified index. Used with integer predicates to quickly get to the n'th element of the node set. Returns false if the position is out of the node set range. You can call it with 0 as the position argument to restart the iteration.

Overrides:

setPosition in class EvalContext

nextSet

public boolean nextSet()

Description copied from class: EvalContext

Returns true if there is another sets of objects to interate over. Resets the current position and node.

Overrides:

nextSet in class EvalContext