Examples of java.lang.ClassValue.ClassValueMap

java.lang.ClassValue.ClassValueMap

    /** 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);
    }

View Full Code Here

        return initializeMap(type);
    }


    private static final Object CRITICAL_SECTION = new Object();
    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;
        }

View Full Code Here

        map.removeEntry(this);
    }


    // Possible functionality for JSR 292 MR 1
    /*public*/ void put(Class<?> type, T value) {
        ClassValueMap map = getMap(type);
        map.changeEntry(this, value);
    }

View Full Code Here

    /// --------


    /** 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
    }

View Full Code Here


    /** 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)
        }

View Full Code Here

     *
     * @param type the type whose class value must be removed
     * @throws NullPointerException if the argument is null
     */
    public void remove(Class<?> type) {
        ClassValueMap map = getMap(type);
        map.removeEntry(this);
    }

View Full Code Here

        map.removeEntry(this);
    }


    // Possible functionality for JSR 292 MR 1
    /*public*/ void put(Class<?> type, T value) {
        ClassValueMap map = getMap(type);
        map.changeEntry(this, value);
    }

View Full Code Here

    /// --------


    /** 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
    }

View Full Code Here


    /** 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)
        }

View Full Code Here

    /** 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);
    }

View Full Code Here

0 1

TOP

Related Classes of java.lang.ClassValue.ClassValueMap

java.lang.ClassValue

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.