private XmlReadHandler createReadHandler(String propertyName) throws ParseException {
try {
final ExpressionMetaData expressionMetaData =
ExpressionRegistry.getInstance().getExpressionMetaData(expressionClass);
final ExpressionPropertyMetaData propertyDescription =
expressionMetaData.getPropertyDescription(propertyName);
if (propertyDescription != null) {
final Class<? extends UserDefinedExpressionPropertyReadHandler> propertyReadHandler =
propertyDescription.getPropertyReadHandler();
if (propertyReadHandler != null) {
final UserDefinedExpressionPropertyReadHandler xmlReadHandler =
propertyReadHandler.newInstance();
xmlReadHandler.init(
beanUtility, originalExpressionClass, expressionClass, expression.getName());
return xmlReadHandler;
}
}
return new ExpressionPropertyReadHandler(
beanUtility, originalExpressionClass, expressionClass, expression.getName());
} catch (MetaDataLookupException e) {
return new ExpressionPropertyReadHandler(
beanUtility, originalExpressionClass, expressionClass, expression.getName());
} catch (Exception e) {
throw new ParseException(
"Unable to read metadata for property '" + propertyName + "'.", getLocator());
}
}
private static ExpressionPropertyWriteHandler createWriteHandler(Expression e, String key) {
try {
final ExpressionMetaData expressionMetaData =
ExpressionRegistry.getInstance().getExpressionMetaData(e.getClass().getName());
final ExpressionPropertyMetaData propertyDescription =
expressionMetaData.getPropertyDescription(key);
final Class<? extends ExpressionPropertyWriteHandler> writeHandlerRef =
propertyDescription.getPropertyWriteHandler();
if (writeHandlerRef != null) {
return writeHandlerRef.newInstance();
}
} catch (Exception ex) {
logger.info("No valid property metadata defined for " + e.getClass() + " on property " + key);
}
return new DefaultExpressionPropertyWriteHandler();
}