/**
* 用回调的方式，遍历一个对象，可以支持遍历
*
* <ul>
* <li>数组
* <li>集合
* <li>Map
* <li>单一元素
* </ul>
*
* @param obj 对象
* @param loopMap 是否循环 Map，如果循环 Map 则主要看 callback 的 T，如果是 Map.Entry 则循环 Entry 否循环 value。如果本值为
* false， 则将 Map 当作一个完整的对象来看待
* @param callback 回调
*/
@SuppressWarnings({"rawtypes", "unchecked"})
public static <T> void each(Object obj, boolean loopMap, Each<T> callback) {
if (null == obj || null == callback) return;
try {
// 循环开始
if (callback instanceof Loop) if (!((Loop) callback).begin()) return;
// 进行循环
Class<T> eType = Mirror.getTypeParam(callback.getClass(), 0);
if (obj.getClass().isArray()) {
int len = Array.getLength(obj);
for (int i = 0; i < len; i++)
try {
callback.invoke(i, (T) Array.get(obj, i), len);
} catch (ContinueLoop e) {
} catch (ExitLoop e) {
break;
}
} else if (obj instanceof Collection) {
int len = ((Collection) obj).size();
int i = 0;
for (Iterator<T> it = ((Collection) obj).iterator(); it.hasNext(); )
try {
callback.invoke(i++, it.next(), len);
} catch (ContinueLoop e) {
} catch (ExitLoop e) {
break;
}
} else if (loopMap && obj instanceof Map) {
Map map = (Map) obj;
int len = map.size();
int i = 0;
if (null != eType && eType != Object.class && eType.isAssignableFrom(Entry.class)) {
for (Object v : map.entrySet())
try {
callback.invoke(i++, (T) v, len);
} catch (ContinueLoop e) {
} catch (ExitLoop e) {
break;
}
} else {
for (Object v : map.entrySet())
try {
callback.invoke(i++, (T) ((Entry) v).getValue(), len);
} catch (ContinueLoop e) {
} catch (ExitLoop e) {
break;
}
}
} else if (obj instanceof Iterator<?>) {
Iterator<?> it = (Iterator<?>) obj;
int i = 0;
while (it.hasNext()) {
try {
callback.invoke(i++, (T) it.next(), -1);
} catch (ContinueLoop e) {
} catch (ExitLoop e) {
break;
}
}
} else
try {
callback.invoke(0, (T) obj, 1);
} catch (ContinueLoop e) {
} catch (ExitLoop e) {
}
// 循环结束
if (callback instanceof Loop) ((Loop) callback).end();
} catch (LoopException e) {
throw Lang.wrapThrow(e.getCause());
}
}