List<Method> objectMethods = new ArrayList<Method>(Arrays.asList(Object.class.getMethods()));
methods.removeAll(objectMethods);
for(Method method:methods) {
//does method have @ManagedAttribute annotation?
ManagedAttribute attr=method.getAnnotation(ManagedAttribute.class);
if(attr != null) {
String methodName=method.getName();
if(!methodName.startsWith("get") && !methodName.startsWith("set")
&& !methodName.startsWith("is")) {
if(log.isWarnEnabled())
log.warn("method name " + methodName
+ " doesn't start with \"get\", \"set\", or \"is\""
+ ", but is annotated with @ManagedAttribute: will be ignored");
}
else {
MBeanAttributeInfo info=null;
//Is name field of @ManagedAttributed used?
String attributeName=attr.name().length()>0?attr.name().trim():null;
boolean writeAttribute=false;
if(isSetMethod(method)) { // setter
attributeName=(attributeName==null)?methodName.substring(3):attributeName;
info=new MBeanAttributeInfo(attributeName,
method.getParameterTypes()[0].getCanonicalName(),
attr.description(),
true,
true,
false);
writeAttribute=true;
}
else { // getter
if(method.getParameterTypes().length == 0 && method.getReturnType() != java.lang.Void.TYPE) {
boolean hasSetter=atts.containsKey(attributeName);
//we found is method
if(methodName.startsWith("is")) {
attributeName=(attributeName==null)?methodName.substring(2):attributeName;
info=new MBeanAttributeInfo(attributeName,
method.getReturnType().getCanonicalName(),
attr.description(),
true,
hasSetter,
true);
}
else {
//this has to be get
attributeName=(attributeName==null)?methodName.substring(3):attributeName;
info=new MBeanAttributeInfo(attributeName,
method.getReturnType().getCanonicalName(),
attr.description(),
true,
hasSetter,
false);
}
}
else {
if(log.isWarnEnabled()) {
log.warn("Method " + method.getName()
+ " must have a valid return type and zero parameters");
}
continue;
}
}
if(log.isDebugEnabled()) {
log.debug("@Attr found for method " + method.getName()
+ " and registered as "
+ attributeName);
}
AttributeEntry ae=atts.get(attributeName);
//is it a read method?
if(!writeAttribute) {
//we already have annotated field as read
if(ae instanceof FieldAttributeEntry && ae.getInfo().isReadable()) {
log.warn("not adding annotated method " + method
+ " since we already have read attribute");
}
//we already have annotated set method
else if(ae instanceof MethodAttributeEntry) {
MethodAttributeEntry mae=(MethodAttributeEntry)ae;
if(mae.hasSetMethod()) {
atts.put(attributeName,
new MethodAttributeEntry(mae.getInfo(), mae.getSetMethod(), method));
}
} //we don't have such entry
else {
atts.put(attributeName, new MethodAttributeEntry(info, null, method));
}
}//is it a set method?
else {
if(ae instanceof FieldAttributeEntry) {
//we already have annotated field as write
if(ae.getInfo().isWritable()) {
log.warn("Not adding annotated method " + methodName
+ " since we already have writable attribute");
}
else {
//we already have annotated field as read
//lets make the field writable
Field f = ((FieldAttributeEntry)ae).getField();
MBeanAttributeInfo i=new MBeanAttributeInfo(ae.getInfo().getName(),
f.getType().getCanonicalName(),
attr.description(),
true,
Modifier.isFinal(f.getModifiers())? false: true,
false);
atts.put(attributeName,new FieldAttributeEntry(i,f));
}