DescriptorSupport.java 文件源码

public synchronized Object getFieldValue(String fieldName)
        throws RuntimeOperationsException {

    if ((fieldName == null) || (fieldName.equals(""))) {
        if (MODELMBEAN_LOGGER.isLoggable(Level.FINEST)) {
            MODELMBEAN_LOGGER.logp(Level.FINEST,
                    DescriptorSupport.class.getName(),
                    "getFieldValue(String fieldName)",
                    "Illegal arguments: null field name");
        }
        final String msg = "Fieldname requested is null";
        final RuntimeException iae = new IllegalArgumentException(msg);
        throw new RuntimeOperationsException(iae, msg);
    }
    Object retValue = descriptorMap.get(fieldName);
    if (MODELMBEAN_LOGGER.isLoggable(Level.FINEST)) {
        MODELMBEAN_LOGGER.logp(Level.FINEST,
                DescriptorSupport.class.getName(),
                "getFieldValue(String fieldName = " + fieldName + ")",
                "Returns '" + retValue + "'");
    }
    return(retValue);
}