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package org.holoeverywhere.addon;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.util.HashMap;
import java.util.Map;
import org.holoeverywhere.HoloEverywhere;
import org.holoeverywhere.util.WeaklyMap;
public abstract class IAddon {
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
public @interface Addon {
public boolean inhert() default false;
public int weight() default -1;
}
private static final Map<Class<? extends IAddon>, IAddon> sAddonsMap = new HashMap<Class<? extends IAddon>, IAddon>();
@SuppressWarnings("unchecked")
public static <T extends IAddon> T addon(Class<T> clazz) {
try {
T t = (T) sAddonsMap.get(clazz);
if (t == null) {
t = clazz.newInstance();
sAddonsMap.put(clazz, t);
}
return t;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static <T extends IAddon> T addon(String classname) {
Class<T> clazz = makeAddonClass(classname);
return addon(clazz);
}
@SuppressWarnings("unchecked")
public static <T extends IAddon> Class<T> makeAddonClass(String classname) {
if (classname.contains(".")) {
try {
return (Class<T>) Class.forName(classname);
} catch (ClassNotFoundException e) {
throw new RuntimeException(e);
}
} else {
return makeAddonClass(HoloEverywhere.PACKAGE + ".addon.Addon" + classname);
}
}
public static <T extends IAddon, Z extends IAddonBase<V>, V> Z obtain(Class<T> clazz, V object) {
return addon(clazz).obtain(object);
}
public static <T extends IAddon, Z extends IAddonBase<V>, V> Z obtain(String classname, V object) {
return addon(classname).obtain(object);
}
private final Map<Object, Object> mStatesMap = new WeaklyMap<Object, Object>();
private final Map<Class<?>, Class<? extends IAddonBase<?>>> mTypesMap = new HashMap<Class<?>, Class<? extends IAddonBase<?>>>();
@SuppressWarnings("unchecked")
public <T, V extends IAddonBase<T>> V obtain(T object) {
try {
V addon = (V) mStatesMap.get(object);
if (addon != null) {
return addon;
}
Class<?> clazz = object.getClass();
while (!mTypesMap.containsKey(clazz)) {
if (clazz == Object.class) {
// Nothing was found
return null;
}
clazz = clazz.getSuperclass();
}
addon = ((Class<V>) mTypesMap.get(clazz)).newInstance();
addon.attach(object, this);
mStatesMap.put(object, addon);
return addon;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public <T> void register(Class<T> clazz, Class<? extends IAddonBase<T>> addonClazz) {
mTypesMap.put(clazz, addonClazz);
}
public void unregister(Class<?> clazz) {
mTypesMap.remove(clazz);
}
}
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