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- import java.util.Hashtable;
- import java.util.Iterator;
- import java.util.Map;
- import java.util.Set;
- public class SingletonProxy {
- public static Hashtable<Class<?>, Object> classes = new Hashtable<Class<?>, Object>();
- public static <T> T getInstance(String classname) throws ClassNotFoundException, InstantiationException, IllegalAccessException {
- Object object = null;
- Class<?> klass = Class.forName("Test");
- if (klass.isAnnotationPresent(Singleton.class)) {
- if (!classes.containsKey(klass)) {
- classes.put(klass, klass.newInstance());
- }
- object = findValueWithKey(klass);
- }
- return (T) object;
- }
- public static Object findValueWithKey(Class<?> key) {
- Object object = null;
- Set set = classes.entrySet();
- Iterator it = set.iterator();
- while (it.hasNext()) {
- Map.Entry entry = (Map.Entry) it.next();
- if (entry.getKey().equals(key))
- object = entry.getValue();
- }
- return object;
- }
- }
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