/**
* Define an attribute on the managed object. The meta data is defined by looking for standard
* getter and setter methods. Descriptions are obtained with a call to findDescription with the
* attribute name.
*
* @param name The name of the attribute. Normal java bean capitlization is enforced on this name.
* @param writable If false, do not look for a setter.
* @param onMBean .
*/
public synchronized void defineAttribute(String name, boolean writable, boolean onMBean) {
_dirty = true;
String uName = name.substring(0, 1).toUpperCase() + name.substring(1);
name = java.beans.Introspector.decapitalize(name);
Class oClass = onMBean ? this.getClass() : _object.getClass();
Class type = null;
Method getter = null;
Method setter = null;
Method[] methods = oClass.getMethods();
for (int m = 0; m < methods.length; m++) {
if ((methods[m].getModifiers() & Modifier.PUBLIC) == 0) continue;
// Look for a getter
if (methods[m].getName().equals("get" + uName)
&& methods[m].getParameterTypes().length == 0) {
if (getter != null) throw new IllegalArgumentException("Multiple getters for attr " + name);
getter = methods[m];
if (type != null && !type.equals(methods[m].getReturnType()))
throw new IllegalArgumentException("Type conflict for attr " + name);
type = methods[m].getReturnType();
}
// Look for an is getter
if (methods[m].getName().equals("is" + uName) && methods[m].getParameterTypes().length == 0) {
if (getter != null) throw new IllegalArgumentException("Multiple getters for attr " + name);
getter = methods[m];
if (type != null && !type.equals(methods[m].getReturnType()))
throw new IllegalArgumentException("Type conflict for attr " + name);
type = methods[m].getReturnType();
}
// look for a setter
if (writable
&& methods[m].getName().equals("set" + uName)
&& methods[m].getParameterTypes().length == 1) {
if (setter != null) throw new IllegalArgumentException("Multiple setters for attr " + name);
setter = methods[m];
if (type != null && !type.equals(methods[m].getParameterTypes()[0]))
throw new IllegalArgumentException("Type conflict for attr " + name);
type = methods[m].getParameterTypes()[0];
}
}
if (getter == null && setter == null)
throw new IllegalArgumentException("No getter or setters found for " + name);
try {
// Remember the methods
_getter.put(name, getter);
_setter.put(name, setter);
// create and add the info
_attributes.add(new ModelMBeanAttributeInfo(name, findDescription(name), getter, setter));
} catch (Exception e) {
log.warn(LogSupport.EXCEPTION, e);
throw new IllegalArgumentException(e.toString());
}
}
