GenericAttributes.java

package com.osroyale.util.generic;
 
import java.util.HashMap;
import java.util.Map;

 
public class GenericAttributes {

    private final Map<Object, Object> genericAttributes = new HashMap<>();
 
    public <K, V> void put(K key, V value) {
        genericAttributes.put(key, value);
    }

    public <K, E> void set(K key, E attribute) {
        genericAttributes.put(key, attribute);
    }

    public <K, E> void modify(K key, E value) {
        genericAttributes.replace(key, value);
    }

    public <K> void remove(K key) {
        genericAttributes.remove(key);
    }

    public <K> boolean has(K key) {
        return genericAttributes.containsKey(key);
    }

    @SuppressWarnings("unchecked")
    public <K, E> E get(K key) {
        try {
            return (E) genericAttributes.get(key);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    @SuppressWarnings("unchecked")
    public <K> Object getObject(K key) {
        try {
            return genericAttributes.get(key);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public <K, E> E get(K key, Class<? extends E> type) {
        Object attribute = genericAttributes.get(key);
        try {
            return type.cast(attribute);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public <K> boolean is(K key) {
        return has(key) && Boolean.TRUE == get(key, Boolean.class);
    }
}