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21-Jul-2017 |
Sergey Vasilinets <sergeyv@google.com> |
Introduce ordering invariants in LifecycleRegistry
Invariant 1: at any moment of time for observer1 & observer2 in
LifecycleRegistry's observers list:
if addition_order(observer1) < addition_order(observer2), then
state(observer1) >= state(observer2).
Invariant 2: Suppose in addition time of observer1 in the current stack
there is a function annotated with @OnLifecycleEvent called on an
observer2, then observer2 is called a parent of observer1 and
observer1 will be brought to state smaller than state(observer2)
Note: Usually Invariant 1 covers Invariant 2, except one corner case
when parent in addition time is already removed from observers list.
bug:63112687
Test: LifecycleRegistryTest
Change-Id: I7d197d96647b0307baf4624e5b2ec324133e4ccf
/frameworks/support/app-toolkit/common/src/main/java/android/arch/core/internal/FastSafeIterableMap.java
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