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

AbstractXPathTemplate()

Method Summary

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.
Properties	getNamespaces() Returns namespaces used in the XPath expression.
protected Element	getRootElement(Source source) Returns the root element of the given source.
void	setNamespaces(Properties 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 Detail

AbstractXPathTemplate

public AbstractXPathTemplate()

Method Detail

getNamespaces

public Properties getNamespaces()

Returns namespaces used in the XPath expression.

setNamespaces

public void setNamespaces(Properties 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