类的使用
org.springframework.lang.Nullable

使用Nullable的程序包

程序包	说明
org.springframework.cache
org.springframework.cache.caffeine
org.springframework.cache.support
org.springframework.util

org.springframework.cache中Nullable的使用

注释类型为Nullable的org.springframework.cache中的方法

限定符和类型	方法和说明
Object	Cache.ValueWrapper.get() Return the actual value in the cache.
Cache.ValueWrapper	Cache.get(Object key) Return the value to which this cache maps the specified key.
<T> T	Cache.get(Object key, Callable<T> valueLoader) Return the value to which this cache maps the specified key, obtaining that value from valueLoader if necessary.
<T> T	Cache.get(Object key, Class<T> type) Return the value to which this cache maps the specified key, generically specifying a type that return value will be cast to.
Cache	CacheManager.getCache(String name) Get the cache associated with the given name.
Object	Cache.ValueRetrievalException.getKey()
default Cache.ValueWrapper	Cache.putIfAbsent(Object key, Object value) Atomically associate the specified value with the specified key in this cache if it is not set already.

注释类型为Nullable的org.springframework.cache中的方法参数

限定符和类型	方法和说明
<T> T	Cache.get(Object key, Class<T> type) Return the value to which this cache maps the specified key, generically specifying a type that return value will be cast to.
void	Cache.put(Object key, Object value) Associate the specified value with the specified key in this cache.
default Cache.ValueWrapper	Cache.putIfAbsent(Object key, Object value) Atomically associate the specified value with the specified key in this cache if it is not set already.

注释类型为Nullable的org.springframework.cache中的构造器参数

构造器和说明
ValueRetrievalException(Object key, Callable<?> loader, Throwable ex)

org.springframework.cache.caffeine中Nullable的使用

注释类型为Nullable的org.springframework.cache.caffeine中的方法

限定符和类型	方法和说明
<T> T	CaffeineCache.get(Object key, Callable<T> valueLoader)
Cache	CaffeineCacheManager.getCache(String name)
protected Object	CaffeineCache.lookup(Object key)
Cache.ValueWrapper	CaffeineCache.putIfAbsent(Object key, Object value)

注释类型为Nullable的org.springframework.cache.caffeine中的方法参数

限定符和类型	方法和说明
void	CaffeineCache.put(Object key, Object value)
Cache.ValueWrapper	CaffeineCache.putIfAbsent(Object key, Object value)
void	CaffeineCacheManager.setCacheNames(Collection<String> cacheNames) Specify the set of cache names for this CacheManager's 'static' mode.

org.springframework.cache.support中Nullable的使用

注释类型为Nullable的org.springframework.cache.support中的方法

限定符和类型	方法和说明
protected Object	AbstractValueAdaptingCache.fromStoreValue(Object storeValue) Convert the given value from the internal store to a user value returned from the get method (adapting null).
Object	SimpleValueWrapper.get() Simply returns the value as given at construction time.
Cache.ValueWrapper	AbstractValueAdaptingCache.get(Object key)
<T> T	AbstractValueAdaptingCache.get(Object key, Class<T> type)
protected abstract Object	AbstractValueAdaptingCache.lookup(Object key) Perform an actual lookup in the underlying store.
protected Cache.ValueWrapper	AbstractValueAdaptingCache.toValueWrapper(Object storeValue) Wrap the given store value with a SimpleValueWrapper, also going through AbstractValueAdaptingCache.fromStoreValue(java.lang.Object) conversion.

注释类型为Nullable的org.springframework.cache.support中的方法参数

限定符和类型	方法和说明
boolean	NullValue.equals(Object obj)
protected Object	AbstractValueAdaptingCache.fromStoreValue(Object storeValue) Convert the given value from the internal store to a user value returned from the get method (adapting null).
<T> T	AbstractValueAdaptingCache.get(Object key, Class<T> type)
protected Object	AbstractValueAdaptingCache.toStoreValue(Object userValue) Convert the given user value, as passed into the put method, to a value in the internal store (adapting null).
protected Cache.ValueWrapper	AbstractValueAdaptingCache.toValueWrapper(Object storeValue) Wrap the given store value with a SimpleValueWrapper, also going through AbstractValueAdaptingCache.fromStoreValue(java.lang.Object) conversion.

注释类型为Nullable的org.springframework.cache.support中的构造器参数

构造器和说明
SimpleValueWrapper(Object value) Create a new SimpleValueWrapper instance for exposing the given value.

org.springframework.util中Nullable的使用

注释类型为Nullable的org.springframework.util中的方法

限定符和类型	方法和说明
static Object	ObjectUtils.unwrapOptional(Object obj) Unwrap the given object which is potentially a Optional.

注释类型为Nullable的org.springframework.util中的方法参数

限定符和类型	方法和说明
static <A,O extends A> A[]	ObjectUtils.addObjectToArray(A[] array, O obj) Append the given object to the given array, returning a new array consisting of the input array contents plus the given object.
static <A,O extends A> A[]	ObjectUtils.addObjectToArray(A[] array, O obj) Append the given object to the given array, returning a new array consisting of the input array contents plus the given object.
static boolean	ObjectUtils.containsElement(Object[] array, Object element) Check whether the given array contains the given element.
static String	ObjectUtils.getDisplayString(Object obj) Return a content-based String representation if obj is not null; otherwise returns an empty String.
static String	ObjectUtils.identityToString(Object obj) Return a String representation of an object's overall identity.
static boolean	ObjectUtils.isArray(Object obj) Determine whether the given object is an array: either an Object array or a primitive array.
static boolean	ObjectUtils.isCompatibleWithThrowsClause(Throwable ex, Class<?>... declaredExceptions) Check whether the given exception is compatible with the specified exception types, as declared in a throws clause.
static boolean	ObjectUtils.isEmpty(Object obj) Determine whether the given object is empty.
static boolean	ObjectUtils.isEmpty(Object[] array) Determine whether the given array is empty: i.e.
static void	Assert.notNull(Object object, String message) Assert that an object is not null.
static String	ObjectUtils.nullSafeClassName(Object obj) Determine the class name for the given object.
static boolean	ObjectUtils.nullSafeEquals(Object o1, Object o2) Determine if the given objects are equal, returning true if both are null or false if only one is null.
static boolean	ObjectUtils.nullSafeEquals(Object o1, Object o2) Determine if the given objects are equal, returning true if both are null or false if only one is null.
static int	ObjectUtils.nullSafeHashCode(boolean[] array) Return a hash code based on the contents of the specified array.
static int	ObjectUtils.nullSafeHashCode(byte[] array) Return a hash code based on the contents of the specified array.
static int	ObjectUtils.nullSafeHashCode(char[] array) Return a hash code based on the contents of the specified array.
static int	ObjectUtils.nullSafeHashCode(double[] array) Return a hash code based on the contents of the specified array.
static int	ObjectUtils.nullSafeHashCode(float[] array) Return a hash code based on the contents of the specified array.
static int	ObjectUtils.nullSafeHashCode(int[] array) Return a hash code based on the contents of the specified array.
static int	ObjectUtils.nullSafeHashCode(long[] array) Return a hash code based on the contents of the specified array.
static int	ObjectUtils.nullSafeHashCode(Object obj) Return as hash code for the given object; typically the value of Object#hashCode()}.
static int	ObjectUtils.nullSafeHashCode(Object[] array) Return a hash code based on the contents of the specified array.
static int	ObjectUtils.nullSafeHashCode(short[] array) Return a hash code based on the contents of the specified array.
static String	ObjectUtils.nullSafeToString(boolean[] array) Return a String representation of the contents of the specified array.
static String	ObjectUtils.nullSafeToString(byte[] array) Return a String representation of the contents of the specified array.
static String	ObjectUtils.nullSafeToString(char[] array) Return a String representation of the contents of the specified array.
static String	ObjectUtils.nullSafeToString(double[] array) Return a String representation of the contents of the specified array.
static String	ObjectUtils.nullSafeToString(float[] array) Return a String representation of the contents of the specified array.
static String	ObjectUtils.nullSafeToString(int[] array) Return a String representation of the contents of the specified array.
static String	ObjectUtils.nullSafeToString(long[] array) Return a String representation of the contents of the specified array.
static String	ObjectUtils.nullSafeToString(Object obj) Return a String representation of the specified Object.
static String	ObjectUtils.nullSafeToString(Object[] array) Return a String representation of the contents of the specified array.
static String	ObjectUtils.nullSafeToString(short[] array) Return a String representation of the contents of the specified array.
static Object[]	ObjectUtils.toObjectArray(Object source) Convert the given array (which may be a primitive array) to an object array (if necessary of primitive wrapper objects).
static Object	ObjectUtils.unwrapOptional(Object obj) Unwrap the given object which is potentially a Optional.