I'm rewriting a framework originally done in C# into Java and this has me stumped. It's a method using reflection to return any property in a class that implements a particular interface using LINQ:
public List<TInterface> GetElementsOfType<TInterface>()
{
return GetType().GetProperties()
.Where(x => typeof(TInterface).IsAssignableFrom(x.PropertyType))
.Select(x => x.GetValue(this, null)).OfType<TInterface>()
.ToList();
}
I am trying to recreate in Java and so far have this. Not too sure if it's right though?:
public <T> List<?> GetElementsOfType(Class<T> klazz) {
Class<?> props = this.getClass();
List<T> elementsOfType = new ArrayList<>();
try {
Field fieldlist[] = props.getDeclaredFields();
for (Field aFieldlist : fieldlist) {
if (aFieldlist.getType().isAssignableFrom(klazz)){
elementsOfType.add((T)aFieldlist);
}
}
} catch (Exception e) {
return null;
}
return elementsOfType;
}
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