SelectExpr

java.lang.Object
- org.exolab.adaptx.xpath.engine.SelectExpr

All Implemented Interfaces:

XPathExpression
```
public final class SelectExpr
extends java.lang.Object
implements XPathExpression
```
This class represents a SelectExpr
```
 [1] SelectExpr ::= UnionExpr
 
```
Version:

$Revision: 3737 $ $Date: 2003-05-13 09:59:57 +0200 (Tue, 13 May 2003) $

Author:

Keith Visco

Field Summary
- Fields inherited from interface org.exolab.adaptx.xpath.XPathExpression
  BOOLEAN, ERROR, FILTER_EXPR, LOCATION_PATH, NODE_TEST, NUMBER, PATH_EXPR, PRIMARY, STEP, STRING, UNION_EXPR

Constructor Summary

Constructors
Constructor Description

SelectExpr()
Creates a new SelectExpr.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`XPathResult`	`evaluate(XPathContext context)`	Evaluates the expression and returns the XPath result.
`short`	`getExprType()`	Returns the type of this expression.
`UnionExpr`	`getUnionExpr()`
`java.lang.String`	`toString()`	Returns the XPath expression as a string.

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

- Constructor Detail
  - SelectExpr
```
public SelectExpr()
```
    Creates a new SelectExpr. This SelectExpr will select the empty node set by default.
- Method Detail
  - toString
```
public java.lang.String toString()
```
    Description copied from interface: XPathExpression
    
    Returns the XPath expression as a string. The returned value is a valid XPath expression that can be parsed into an equivalent XPathExpression object.
    
    Specified by:
    
    toString in interface XPathExpression
    
    Overrides:
    
    toString in class java.lang.Object
    
    Returns:
    
    The XPath expression as a string
  - getExprType
```
public short getExprType()
```
    Description copied from interface: XPathExpression
    
    Returns the type of this expression.
    
    Specified by:
    
    getExprType in interface XPathExpression
    
    Returns:
    
    The type of this expression
  - evaluate
```
public XPathResult evaluate(XPathContext context)
                     throws XPathException
```
    Evaluates the expression and returns the XPath result.
    
    Specified by:
    
    evaluate in interface XPathExpression
    
    Parameters:
    
    context - The XPathContext to use during evaluation.
    
    Returns:
    
    The XPathResult (not null).
    
    Throws:
    
    XPathException - if an error occured while evaluating this expression.
  - getUnionExpr
```
public UnionExpr getUnionExpr()
```