How to compare 2 Java beans

Given the following function comparing 2 beans :

public static boolean compareBeans(Object bean1, Object bean2) {

First thing to do is to check if it is the same object and if they are not null :

if (bean1 == bean2) {
	return true;
}
if (bean1 == null || bean2 == null) {
	return false;
}

Remark that we don't need to check both are null because then they would be equal :

 if (bean1 == null && bean2 == null) { return true; }

Once not null we can check if both beans belong to the same class :

if (bean1.getClass() != bean2.getClass()) {
	return false;
}

For base types (primitive equivalent class + String) we can use the the equals function and no introspection for performance reasons.

Class<? extends Object> clazz = bean1.getClass();
if (clazz == String.class || clazz == Integer.class || clazz == Double.class || clazz == Float.class || clazz == Date.class) {
	return bean1.equals(bean2);
}

Next only introspection is left, so let's first gather the information of the bean class :

BeanInfo beanInfo = null;
try {
	beanInfo = Introspector.getBeanInfo(clazz);
} catch (IntrospectionException e) {
	logger.log(Level.SEVERE, e.getMessage(), e);
	return false;
}

Next we loop over all the properties, get the read method and invoke it on both beans. Both values are compared by recursively calling the current compareBeans function :

for (PropertyDescriptor prop : beanInfo.getPropertyDescriptors()) {
	Method getter = prop.getReadMethod();
	if (getter == null) {
		continue;
	}
	Object value1 = null;
	Object value2 = null;
	try {
		value1 = getter.invoke(bean1);
		value2 = getter.invoke(bean2);
	} catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
		logger.log(Level.SEVERE, e.getMessage(), e);
		return false;
	}
	// compare the values as beans
	if (!compareBeans(value1, value2)) {
		return false;
	}
}
return true;

Finally if all properties are equal true is returned.