com.bumptech.glide.load

Class Option<T>

java.lang.Object

com.bumptech.glide.load.Option<T>

Type Parameters:

T - The type of the option (Integer, Bitmap.CompressFormat etc.), must implement equals(Object) and hashCode().

public final class Option<T>
extends Object

Defines available component (decoders, encoders, model loaders etc.) options with optional default values and the ability to affect the resource disk cache key used by DiskCacheStrategy.RESOURCE.

Implementations must either be unique (usually declared as static final variables), or implement equals(Object) and hashCode().

Implementations can implement update(Object, MessageDigest) to make sure that the disk cache key includes the specific option set.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	Option.CacheKeyUpdater<T> An interface that updates a MessageDigest with the given value as part of a process to generate a disk cache key.

Method Summary

Modifier and Type	Method and Description
static <T> Option<T>	disk(String key, Option.CacheKeyUpdater<T> cacheKeyUpdater) Returns a new Option that uses the given Option.CacheKeyUpdater to update disk cache keys.
static <T> Option<T>	disk(String key, T defaultValue, Option.CacheKeyUpdater<T> cacheKeyUpdater) Returns a new Option that uses the given Option.CacheKeyUpdater to update disk cache keys and provides the given value as the default value.
boolean	equals(Object o)
T	getDefaultValue() Returns a reasonable default to use if no other value is set, or null.
int	hashCode()
static <T> Option<T>	memory(String key) Returns a new Option that does not affect disk cache keys with a null default value.
static <T> Option<T>	memory(String key, T defaultValue) Returns a new Option that does not affect disk cache keys with the given value as the default value.
String	toString()
void	update(T value, MessageDigest messageDigest) Updates the given MessageDigest used to construct a cache key with the given value using the Option.CacheKeyUpdater optionally provided in the constructor.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

memory

public static <T> Option<T> memory(String key)

Returns a new Option that does not affect disk cache keys with a null default value.

Parameters:

key - A unique package prefixed String that identifies this option (must be stable across builds, so Class.getName() should not be used).

memory

public static <T> Option<T> memory(String key,
                                   T defaultValue)

Returns a new Option that does not affect disk cache keys with the given value as the default value.

Parameters:

key - A unique package prefixed String that identifies this option (must be stable across builds, so Class.getName() should not be used).

disk

public static <T> Option<T> disk(String key,
                                 Option.CacheKeyUpdater<T> cacheKeyUpdater)

Returns a new Option that uses the given Option.CacheKeyUpdater to update disk cache keys.

Parameters:

key - A unique package prefixed String that identifies this option (must be stable across builds, so Class.getName() should not be used).

disk

public static <T> Option<T> disk(String key,
                                 T defaultValue,
                                 Option.CacheKeyUpdater<T> cacheKeyUpdater)

Returns a new Option that uses the given Option.CacheKeyUpdater to update disk cache keys and provides the given value as the default value.

Parameters:

key - A unique package prefixed String that identifies this option (must be stable across builds, so Class.getName() should not be used).

getDefaultValue

@Nullable
public T getDefaultValue()

Returns a reasonable default to use if no other value is set, or null.

update

public void update(T value,
                   MessageDigest messageDigest)

Updates the given MessageDigest used to construct a cache key with the given value using the Option.CacheKeyUpdater optionally provided in the constructor.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object