PredicateContext (Commons JXPath 1.3 API)

java.lang.Object
- org.apache.commons.jxpath.ri.EvalContext
- - org.apache.commons.jxpath.ri.axes.PredicateContext

All Implemented Interfaces:

Iterator, ExpressionContext
```
public class PredicateContext
extends EvalContext
```
EvalContext that checks predicates.

Version:

$Revision: 652845 $ $Date: 2008-05-02 19:46:46 +0200 (Fr, 02 Mai 2008) $

Author:

Dmitri Plotnikov

Field Summary
- Fields inherited from class org.apache.commons.jxpath.ri.EvalContext
  parentContext, position, rootContext

Constructor Summary

Constructors
Constructor and Description

PredicateContext(EvalContext parentContext, Expression expression)
Create a new PredicateContext.

Constructors
Constructor and Description
`PredicateContext(EvalContext parentContext, Expression expression)` Create a new PredicateContext.

Method Summary

Methods
Modifier and Type	Method and 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.

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

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - PredicateContext
```
public PredicateContext(EvalContext parentContext,
                Expression expression)
```
    Create a new PredicateContext.
    
    Parameters:
    parentContext - parent context
    expression - compiled Expression
- Method Detail
  - 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
    
    Returns:
    boolean
  - 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
    
    Parameters:
    position - to set
    
    Returns:
    boolean
  - 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
    
    Returns:
    NodePoiner
  - reset
```
public void reset()
```
    Description copied from class: EvalContext
    
    Sets current position = 0, which is the pre-iteration state.
    
    Overrides:
    
    reset 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
    
    Returns:
    boolean

Class PredicateContext

Field Summary

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

Constructor Summary

Method Summary

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

Methods inherited from class java.lang.Object

Constructor Detail

PredicateContext

Method Detail

nextNode

setPosition

getCurrentNodePointer

reset

nextSet