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*
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* [2002] - [2007] Adobe Systems Incorporated
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package flex.messaging.config;
import org.apache.xpath.CachedXPathAPI;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import javax.xml.transform.TransformerException;
/**
* Uses Apache XPath on a DOM representation of a messaging configuration
* file.
* <p>
* Note: Since reference ids are used between elements, certain
* sections of the document need to be parsed first.
* </p>
*
* @author Peter Farland
* @exclude
*/
public class ApacheXPathServerConfigurationParser extends ServerConfigurationParser
{
private CachedXPathAPI xpath;
protected void initializeExpressionQuery()
{
this.xpath = new CachedXPathAPI();
}
protected Node selectSingleNode(Node source, String expression)
{
try
{
return xpath.selectSingleNode(source, expression);
}
catch (TransformerException transformerException)
{
throw wrapException(transformerException);
}
}
protected NodeList selectNodeList(Node source, String expression)
{
try
{
return xpath.selectNodeList(source, expression);
}
catch (TransformerException transformerException)
{
throw wrapException(transformerException);
}
}
protected Object evaluateExpression(Node source, String expression)
{
try
{
return xpath.eval(source, expression);
}
catch (TransformerException transformerException)
{
throw wrapException(transformerException);
}
}
private ConfigurationException wrapException(TransformerException exception)
{
ConfigurationException result = new ConfigurationException();
result.setDetails(PARSER_INTERNAL_ERROR);
result.setRootCause(exception);
return result;
}
}
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