/**
* Tells the system to use (restore) the default (initial) XPath system used by this FreeMarker
* version on this system.
*/
public static void useDefaultXPathSupport() {
xpathSupportClass = null;
jaxenXPathSupport = null;
try {
useXalanXPathSupport();
} catch (Exception e) {; // ignore
}
if (xpathSupportClass == null)
try {
useSunInternalXPathSupport();
} catch (Exception e) {; // ignore
}
if (xpathSupportClass == null)
try {
useJaxenXPathSupport();
} catch (Exception e) {; // ignore
}
}
static void setFreeMarkerXPathEngine(String xpathEngine) throws IllegalConfigurationException {
if (xpathEngine.equals(Engine.XPATH_ENGINE_DONT_SET)) {; // do nothing
} else if (xpathEngine.equals(Engine.XPATH_ENGINE_DEFAULT)) {
NodeModel.useDefaultXPathSupport();
} else if (xpathEngine.equals(Engine.XPATH_ENGINE_XALAN)) {
try {
NodeModel.useXalanXPathSupport();
} catch (Exception e) {
throw new IllegalConfigurationException("Failed to use Xalan XPath engine.", e);
}
} else if (xpathEngine.equals(Engine.XPATH_ENGINE_JAXEN)) {
try {
NodeModel.useJaxenXPathSupport();
} catch (Exception e) {
throw new IllegalConfigurationException("Failed to use Jaxen XPath engine.", e);
}
} else {
Class cl;
try {
cl = MiscUtil.classForName(xpathEngine);
} catch (ClassNotFoundException e) {
throw new IllegalConfigurationException(
"Custom XPath engine adapter class "
+ StringUtil.jQuote(xpathEngine)
+ " not found. "
+ "Note that the reserved names are: "
+ StringUtil.jQuote(Engine.XPATH_ENGINE_DONT_SET)
+ ", "
+ StringUtil.jQuote(Engine.XPATH_ENGINE_DEFAULT)
+ ", "
+ StringUtil.jQuote(Engine.XPATH_ENGINE_XALAN)
+ ", "
+ StringUtil.jQuote(Engine.XPATH_ENGINE_JAXEN)
+ ".",
e);
}
NodeModel.setXPathSupportClass(cl);
}
}
