Re: [appfuse-user] DaoUtils Problem

Sat, 30 Dec 2006 03:10:24 -0800

I resolved this way

public class DaoUtils {

    protected static final Log log = LogFactory.getLog(DaoUtils.class);
    private static final String GET_INITIALS = "get";

    @SuppressWarnings("unchecked")
    public static Object getPersistentId(Object o) throws PersistenceException {
        Object objId = null;
        final String eMsg = "Error executing get<IdValue> method on persistent class.";
        String logMsg = "Persistent identity for object of type '?1' is accessible with method '?2'";

        try {
            final AccessibleObject annotatedAccessibleObject = getAnnotatedAccessibleObject(o, Id.class, EmbeddedId.class);

            if (annotatedAccessibleObject != null) {
                Method getter = null;
                if (annotatedAccessibleObject instanceof Method) {
                    getter = (Method) annotatedAccessibleObject;
                } else if (annotatedAccessibleObject instanceof Field) {
                    getter = findGetter(o.getClass(), ((Field) annotatedAccessibleObject).getName());
                }

                objId = getter.invoke(o);
                if (log.isDebugEnabled()) {
                    logMsg = logMsg.replace("?1", o.getClass().getName());
                    logMsg = logMsg.replace("?2", getter.getName());
                    log.debug(logMsg);
                }
            }
        } catch (IllegalArgumentException e) {
            throw new PersistenceException(eMsg, e);
        } catch (IllegalAccessException e) {
            throw new PersistenceException(eMsg, e);
        } catch (InvocationTargetException e) {
            throw new PersistenceException(eMsg, e);
        } catch (SecurityException e) {
            throw new PersistenceException(eMsg, e);
        } catch (NoSuchMethodException e) {
            throw new PersistenceException("There is no getter method for " + o.getClass().getSimpleName() + " ID property", e);
        }

        return objId;
    }

    private static AccessibleObject getAnnotatedAccessibleObject(Object o, Class<? extends Annotation>... annotations) throws PersistenceException {

        final Set<AccessibleObject> members = new HashSet<AccessibleObject>();
        members.addAll(Arrays.asList(o.getClass().getDeclaredMethods()));
        members.addAll(Arrays.asList(o.getClass().getDeclaredFields()));

        for (AccessibleObject member : members) {
            for (Class<? extends Annotation> annotation : annotations)
                if (member.isAnnotationPresent(annotation))
                    return member;
        }

        return null;
    }

    private static Method findGetter(Class type, String property) throws SecurityException, NoSuchMethodException {
        String methodName = GET_INITIALS + Character.toUpperCase(property.charAt(0)) + property.substring(1);
        try {
            return type.getMethod(methodName);
        } catch (SecurityException e) {
            throw e;
        } catch (NoSuchMethodException e) {
            throw e;
        }
    }

}


but I think that the last two  methods shold be in ReflectionUtils..
what do you think?


André Faria




Matt Raible escreveu:
Bryan wrote the code for this and he's on vacation this week.  Do you
have a suggestion on how to fix this?

Matt

On 12/29/06, André Faria <[EMAIL PROTECTED]> wrote:
       The method getPersistentId in DaoUtils do not work if the annotations
were int the field...

[EMAIL PROTECTED]
 private int personKey;



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public class DaoUtils {

        protected static final Log log = LogFactory.getLog(DaoUtils.class);
        private static final String GET_INITIALS = "get";

        @SuppressWarnings("unchecked")
        public static Object getPersistentId(Object o) throws 
PersistenceException {
                Object objId = null;
                final String eMsg = "Error executing get<IdValue> method on 
persistent class.";
                String logMsg = "Persistent identity for object of type '?1' is 
accessible with method '?2'";

                try {
                        final AccessibleObject annotatedAccessibleObject = 
getAnnotatedAccessibleObject(o, Id.class, EmbeddedId.class);

                        if (annotatedAccessibleObject != null) {
                                Method getter = null;
                                if (annotatedAccessibleObject instanceof 
Method) {
                                        getter = (Method) 
annotatedAccessibleObject;
                                } else if (annotatedAccessibleObject instanceof 
Field) {
                                        getter = findGetter(o.getClass(), 
((Field) annotatedAccessibleObject).getName());
                                }

                                objId = getter.invoke(o);
                                if (log.isDebugEnabled()) {
                                        logMsg = logMsg.replace("?1", 
o.getClass().getName());
                                        logMsg = logMsg.replace("?2", 
getter.getName());
                                        log.debug(logMsg);
                                }
                        }
                } catch (IllegalArgumentException e) {
                        throw new PersistenceException(eMsg, e);
                } catch (IllegalAccessException e) {
                        throw new PersistenceException(eMsg, e);
                } catch (InvocationTargetException e) {
                        throw new PersistenceException(eMsg, e);
                } catch (SecurityException e) {
                        throw new PersistenceException(eMsg, e);
                } catch (NoSuchMethodException e) {
                        throw new PersistenceException("There is no getter 
method for " + o.getClass().getSimpleName() + " ID property", e);
                }

                return objId;
        }

        private static AccessibleObject getAnnotatedAccessibleObject(Object o, 
Class<? extends Annotation>... annotations) throws PersistenceException {

                final Set<AccessibleObject> members = new 
HashSet<AccessibleObject>();
                
members.addAll(Arrays.asList(o.getClass().getDeclaredMethods()));
                members.addAll(Arrays.asList(o.getClass().getDeclaredFields()));

                for (AccessibleObject member : members) {
                        for (Class<? extends Annotation> annotation : 
annotations)
                                if (member.isAnnotationPresent(annotation))
                                        return member;
                }

                return null;
        }

        private static Method findGetter(Class type, String property) throws 
SecurityException, NoSuchMethodException {
                String methodName = GET_INITIALS + 
Character.toUpperCase(property.charAt(0)) + property.substring(1);
                try {
                        return type.getMethod(methodName);
                } catch (SecurityException e) {
                        throw e;
                } catch (NoSuchMethodException e) {
                        throw e;
                }
        }

}
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