Class PrecedingOrFollowingContext
- java.lang.Object
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- org.apache.commons.jxpath.ri.EvalContext
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- org.apache.commons.jxpath.ri.axes.PrecedingOrFollowingContext
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- All Implemented Interfaces:
java.util.Iterator
,ExpressionContext
public class PrecedingOrFollowingContext extends EvalContext
EvalContext that walks the "preceding::" and "following::" axes.- Version:
- $Revision: 670727 $ $Date: 2008-06-23 15:10:38 -0500 (Mon, 23 Jun 2008) $
- Author:
- Dmitri Plotnikov
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Field Summary
Fields Modifier and Type Field Description private NodePointer
currentNodePointer
private NodePointer
currentRootLocation
private NodeTest
nodeTest
private boolean
reverse
private boolean
setStarted
private java.util.Stack
stack
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Fields inherited from class org.apache.commons.jxpath.ri.EvalContext
parentContext, position, rootContext
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Constructor Summary
Constructors Constructor Description PrecedingOrFollowingContext(EvalContext parentContext, NodeTest nodeTest, boolean reverse)
Create a new PrecedingOrFollowingContext.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description NodePointer
getCurrentNodePointer()
Returns the current context node.int
getDocumentOrder()
Determines the document order for this context.boolean
nextNode()
Returns true if there is another object in the current set.void
reset()
Sets current position = 0, which is the pre-iteration state.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, getJXPathContext, getNodeSet, getPosition, getRootContext, getSingleNodePointer, getValue, hasNext, isChildOrderingRequired, next, nextSet, remove, sortPointers, toString
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Field Detail
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nodeTest
private NodeTest nodeTest
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setStarted
private boolean setStarted
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stack
private java.util.Stack stack
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currentNodePointer
private NodePointer currentNodePointer
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currentRootLocation
private NodePointer currentRootLocation
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reverse
private boolean reverse
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Constructor Detail
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PrecedingOrFollowingContext
public PrecedingOrFollowingContext(EvalContext parentContext, NodeTest nodeTest, boolean reverse)
Create a new PrecedingOrFollowingContext.- Parameters:
parentContext
- parent contextnodeTest
- testreverse
- whether to iterate in reverse order
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Method Detail
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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 classEvalContext
- Returns:
- NodePoiner
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getDocumentOrder
public int getDocumentOrder()
Description copied from class:EvalContext
Determines the document order for this context.- Overrides:
getDocumentOrder
in classEvalContext
- Returns:
- 1 ascending order, -1 descending order, 0 - does not require ordering
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reset
public void reset()
Description copied from class:EvalContext
Sets current position = 0, which is the pre-iteration state.- Overrides:
reset
in classEvalContext
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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 classEvalContext
- Parameters:
position
- to set- Returns:
- boolean
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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 classEvalContext
- Returns:
- boolean
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