UnionContext (Commons JXPath 1.3 API)

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

All Implemented Interfaces:

Iterator, ExpressionContext
```
public class UnionContext
extends NodeSetContext
```
EvalContext that represents a union between other contexts - result of a union operation like (a | b)

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

UnionContext(EvalContext parentContext, EvalContext[] contexts)
Create a new UnionContext.

Method Summary

Methods
Modifier and Type	Method and Description
`int`	`getDocumentOrder()` Determines the document order for this context.
`boolean`	`setPosition(int position)` Moves the current position to the specified index.

Methods inherited from class org.apache.commons.jxpath.ri.axes.NodeSetContext
getCurrentNodePointer, getNodeSet, nextNode, nextSet

Methods inherited from class org.apache.commons.jxpath.ri.EvalContext
getContextNodeList, getContextNodePointer, getCurrentPosition, getJXPathContext, getPosition, getRootContext, getSingleNodePointer, getValue, hasNext, isChildOrderingRequired, next, remove, reset, sortPointers, toString

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

- Constructor Detail
  - UnionContext
```
public UnionContext(EvalContext parentContext,
            EvalContext[] contexts)
```
    Create a new UnionContext.
    
    Parameters:
    parentContext - parent context
    contexts - child contexts
- Method Detail
  - getDocumentOrder
```
public int getDocumentOrder()
```
    Description copied from class: EvalContext
    
    Determines the document order for this context.
    
    Overrides:
    
    getDocumentOrder in class EvalContext
    
    Returns:
    1 ascending order, -1 descending order, 0 - does not require ordering
  - 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 NodeSetContext
    
    Parameters:
    position - to set
    
    Returns:
    boolean

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