Class PredicateContext
- java.lang.Object
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- org.apache.commons.jxpath.ri.EvalContext
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- org.apache.commons.jxpath.ri.axes.PredicateContext
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- All Implemented Interfaces:
java.util.Iterator
,ExpressionContext
public class PredicateContext extends EvalContext
EvalContext that checks predicates.- Version:
- $Revision: 652845 $ $Date: 2008-05-02 12:46:46 -0500 (Fri, 02 May 2008) $
- Author:
- Dmitri Plotnikov
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Field Summary
Fields Modifier and Type Field Description private boolean
done
private PropertyPointer
dynamicPropertyPointer
private Expression
expression
private Expression
nameTestExpression
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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 PredicateContext(EvalContext parentContext, Expression expression)
Create a new PredicateContext.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description NodePointer
getCurrentNodePointer()
Returns the current context node.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.void
reset()
Sets current position = 0, which is the pre-iteration state.boolean
setPosition(int position)
Moves the current position to the specified index.private boolean
setPositionStandard(int position)
Basic setPositionprivate boolean
setupDynamicPropertyPointer()
Used for an optimized access to dynamic properties using the "map[@name = 'name']" syntax-
Methods inherited from class org.apache.commons.jxpath.ri.EvalContext
getContextNodeList, getContextNodePointer, getCurrentPosition, getDocumentOrder, getJXPathContext, getNodeSet, getPosition, getRootContext, getSingleNodePointer, getValue, hasNext, isChildOrderingRequired, next, remove, sortPointers, toString
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Field Detail
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expression
private Expression expression
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done
private boolean done
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nameTestExpression
private Expression nameTestExpression
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dynamicPropertyPointer
private PropertyPointer dynamicPropertyPointer
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Constructor Detail
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PredicateContext
public PredicateContext(EvalContext parentContext, Expression expression)
Create a new PredicateContext.- Parameters:
parentContext
- parent contextexpression
- compiled Expression
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Method Detail
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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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setupDynamicPropertyPointer
private boolean setupDynamicPropertyPointer()
Used for an optimized access to dynamic properties using the "map[@name = 'name']" syntax- Returns:
- whether valid
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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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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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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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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 classEvalContext
- Returns:
- boolean
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setPositionStandard
private boolean setPositionStandard(int position)
Basic setPosition- Parameters:
position
- to set- Returns:
- whether valid
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