Package org.springframework.xml.xpath

Class AbstractXPathTemplate

java.lang.Object

org.springframework.xml.transform.TransformerObjectSupport

org.springframework.xml.xpath.AbstractXPathTemplate

All Implemented Interfaces:

XPathOperations

Direct Known Subclasses:

JaxenXPathTemplate, Jaxp13XPathTemplate

public abstract class AbstractXPathTemplate
extends TransformerObjectSupport
implements XPathOperations

Abstract base class for implementations of XPathOperations. Contains a namespaces property.

Since:

1.0.0

Author:

Arjen Poutsma

Field Summary

Fields inherited from class org.springframework.xml.transform.TransformerObjectSupport

logger

Constructor Summary

Constructors

Constructor	Description
AbstractXPathTemplate()

Method Summary

Modifier and Type	Method	Description
final void	evaluate(String expression, Source context, NodeCallbackHandler callbackHandler)	Evaluates the given expression, handling the result Node objects on a per-node basis with a NodeCallbackHandler.
Map<String,String>	getNamespaces()	Returns namespaces used in the XPath expression.
protected Element	getRootElement(Source source)	Returns the root element of the given source.
void	setNamespaces(Map<String,String> namespaces)	Sets namespaces used in the XPath expression.

Methods inherited from class org.springframework.xml.transform.TransformerObjectSupport

createTransformer, getTransformerFactory, newTransformerFactory, setTransformerFactoryClass, transform

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.springframework.xml.xpath.XPathOperations

evaluate, evaluateAsBoolean, evaluateAsDouble, evaluateAsNode, evaluateAsNodeList, evaluateAsObject, evaluateAsString

Constructor Details

AbstractXPathTemplate

public AbstractXPathTemplate()

Method Details

getNamespaces

public Map<String,String> getNamespaces()

Returns namespaces used in the XPath expression.

setNamespaces

public void setNamespaces(Map<String,String> namespaces)

Sets namespaces used in the XPath expression. Maps prefixes to namespaces.

evaluate

public final void evaluate(String expression,
 Source context,
 NodeCallbackHandler callbackHandler)
                    throws XPathException

Description copied from interface: XPathOperations

Evaluates the given expression, handling the result Node objects on a per-node basis with a NodeCallbackHandler.

Specified by:

evaluate in interface XPathOperations

Parameters:

expression - the XPath expression

context - the context starting point

callbackHandler - object that will extract results, one row at a time

Throws:

XPathException - in case of XPath errors

See Also:

• XPath specification

getRootElement

protected Element getRootElement(Source source)
                          throws TransformerException

Returns the root element of the given source.

Parameters:

source - the source to get the root element from

Returns:

the root element

Throws:

TransformerException