JRXPathExecuter (JasperReports Javadoc 7.0.0 API)

All Known Implementing Classes:

JaxenNsAwareXPathExecuter, JaxenXPathExecuter, XalanNsAwareXPathExecuter, XalanXPathExecuter
```
public interface JRXPathExecuter
```
An XPath expression executer.
XML data sources delegate XPath executions to implementations of this interface.

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

See Also:

JRXPathExecuterFactory, JRXPathExecuterUtils

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`NodeList`	`selectNodeList(Node contextNode, String expression)`	Selects a node list by evaluating an XPath expression on a context node.
`Object`	`selectObject(Node contextNode, String expression)`	Selects an object by evaluating an XPath expression on a context node.

- Method Detail
  - selectNodeList
```
NodeList selectNodeList(Node contextNode,
                        String expression)
                 throws JRException
```
    Selects a node list by evaluating an XPath expression on a context node.
    
    Parameters:
    
    contextNode - the context node (a document can also be used)
    
    expression - the XPath expression
    
    Returns:
    
    the selected node list
    
    Throws:
    
    JRException - if the XPath evaluation failed
  - selectObject
```
Object selectObject(Node contextNode,
                    String expression)
             throws JRException
```
    Selects an object by evaluating an XPath expression on a context node.
    If the expression evaluates to a node list, the first node in the list should be returned. Otherwise, the primitive value resulted from the evaluation should be returned as a java.lang.String, java.lang.Number or java.lang.Boolean.
    
    Parameters:
    
    contextNode - the context node (a document can also be used)
    
    expression - the XPath expression
    
    Returns:
    
    the selected node or value
    
    Throws:
    
    JRException - if the XPath evaluation failed