Pilgr Paper Versions Save

Fixes:

• Crash on read caused by R8 optimization

Improvements:

• Add nullability annotations

Thanks Keita Watanabe, Nabil Mosharraf, Ahmet Türk

Fixes:

• Ignore backup files in getAllKeys
• Fix exception on simultaneous write and destroy

Thanks Alexandre Boucey, Mohamed Wael and other contributors to make this happen!

New API:

• Paper.bookOn(path) to set custom storage location;
• book.getPath() or book.getPath(key) to get path for content of book or key.

Improvements:

• simultaneous read/write for different keys, up to 97% performance gain per thread.
• name change: use book.contains(key) instead of deprecated book.exist(key)

Thanks @hiperioncn and @cezar-carneiro for your contribution!

This update contains critical fixes, please update your project ASAP:

• #87 : fix crash on data migration when switching lib from 1.x to 2.x
• #90: do not remove data file after failed read attempt (don't consider file broken).

• #40: Allow logging kryo marshalling;
• Add Book.lastModified() for given key to return timestamp of last update;
• #58: Fix warning on read data on Android N+;

• Update internal Kryo serializer to 4.0. The data format is changed, but Paper supports backward data compatibility automatically;
• Now 58% less methods count : 4037;
• Depends on data structure you may experience faster reading but slower writing.

Migrate to Kryo 4.0 Decrease dependencies methods count

• Removed restriction to use classes only having no-arg constructor;
• Custom serializers now can be added using Paper.addSerializer();
• Kotlin is fully supported now, including saving data classes.

New Paper.book().getAllKeys() api Proguard config for lib itself is included in aar.

• New multi-book API.
• 0.9 API is still supported and marked as deprecated.
• Unsafe possibility to write null values is disabled.

NOTE: Data storage format is unchanged. You can easily use files created within version 0.9.