本文整理汇总了Java中java.lang.ClassValue.ClassValueMap类的典型用法代码示例。如果您正苦于以下问题：Java ClassValueMap类的具体用法？Java ClassValueMap怎么用？Java ClassValueMap使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
ClassValueMap类属于java.lang.ClassValue包，在下文中一共展示了ClassValueMap类的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: getFromHashMap
import java.lang.ClassValue.ClassValueMap; //导入依赖的package包/类
/** Called when the fast path of get fails, and cache reprobe also fails.
*/
private T getFromHashMap(Class<?> type) {
// The fail-safe recovery is to fall back to the underlying classValueMap.
ClassValueMap map = getMap(type);
for (;;) {
Entry<T> e = map.startEntry(this);
if (!e.isPromise())
return e.value();
try {
// Try to make a real entry for the promised version.
e = makeEntry(e.version(), computeValue(type));
} finally {
// Whether computeValue throws or returns normally,
// be sure to remove the empty entry.
e = map.finishEntry(this, e);
}
if (e != null)
return e.value();
// else try again, in case a racing thread called remove (so e == null)
}
}
示例2: getCacheCarefully
import java.lang.ClassValue.ClassValueMap; //导入依赖的package包/类
/** Return the cache, if it exists, else a dummy empty cache. */
private static Entry<?>[] getCacheCarefully(Class<?> type) {
// racing type.classValueMap{.cacheArray} : null => new Entry[X] <=> new Entry[Y]
ClassValueMap map = type.classValueMap;
if (map == null) return EMPTY_CACHE;
Entry<?>[] cache = map.getCache();
return cache;
// invariant: returned value is safe to dereference and check for an Entry
}
示例3: getMap
import java.lang.ClassValue.ClassValueMap; //导入依赖的package包/类
/** Return the backing map associated with this type. */
private static ClassValueMap getMap(Class<?> type) {
// racing type.classValueMap : null (blank) => unique ClassValueMap
// if a null is observed, a map is created (lazily, synchronously, uniquely)
// all further access to that map is synchronized
ClassValueMap map = type.classValueMap;
if (map != null) return map;
return initializeMap(type);
}
示例4: initializeMap
import java.lang.ClassValue.ClassValueMap; //导入依赖的package包/类
private static ClassValueMap initializeMap(Class<?> type) {
ClassValueMap map;
synchronized (CRITICAL_SECTION) { // private object to avoid deadlocks
// happens about once per type
if ((map = type.classValueMap) == null)
type.classValueMap = map = new ClassValueMap(type);
}
return map;
}