J2Kコンバータをカスタマイズする

2018/7/3 #love_kotlin vol2
paraya3636

Transcript

1. +,ίϯόʔλΛΧελϚΠζ͢Δ
   
   MPWF@LPUMJO
   WPM
   QBSBZB ͠Ύͬͪΐ͏͹Μ
2. ࣗݾ঺հ ɾ ࡾӜՂ༞QBSBZB
   
   ɾ גࣜձࣾΠάχεॴଐ
   ɾ XJUI"OESPJE୲౰
   ɾ ,PUMJO͸ͷࠒ͔Β ೥ఔ
3. ςʔϚ ɾ +BWB͔Β,PUMJOʹม׵͢Δͷ͸ͱͯ΋େม
   ɾ ,PUMJOԽ͢Δ্Ͱ௨ৗͷํ๏Ҏ֎ʹ΋΍Γํ ͸͋Δ
4. ΋͘͡ ɾ +BWB͔Β,PUMJOʹม׵͢Δࡍʹۤ࿑͢Δ఺
   ɾ +,ίϯόʔλΛΧελϚΠζ
5. +BWB͔Β,PUMJOʹม׵͢Δ
   ࡍʹۤ࿑͢Δ఺
6. ௨ৗ+BWB͔Β,PUMJOʹม׵͢ Δࡍ͸ɺ"OESPJE4UVEJP *OUFMMJK*%&"͔Βίϯόʔτ͢ Δͱࢥ͍·͢
7. "OESPJE4UVEJP*OUFMMJK*%&"
   Ͱͷ+,ίϯόʔτ ϝχϡʔ ➔ Code ➔ Convert Java File to Kotlin File
8. ͨͩ͠ɺ͜ͷ௨ৗͷ+,ίϯ όʔλΛ༻͍ͨ,PUMJOԽͷํ ๏ʹ͸໰୊͕͋Γ·ͨ͠
9. +,ίϯόʔλ͕ڧ੍తʹ /PO/VMMม׵ͯ͠͠·͏
   ໰୊
10. ७ਖ਼+,ίϯόʔλ͕ڧ੍తʹ /PO/VMMม׵͢Δ໰୊ public interface SampleInterface { String getText(Context context); int getValue(Context context); } interface SampleInterface { fun getText(context: Context): String fun getValue(context: Context): Int } /VMMBCMFͳ
    ίʔυͩͬͨͷ͕ /PO/VMMίʔυʹ
    ม׵͞Εͯ͠·͏
    ʁ͕ͳ͍ʂ +BWB ,PUMJO
11. ७ਖ਼+,ίϯόʔλ͕ڧ੍తʹ /PO/VMMม׵͢Δ໰୊ +BWBίʔυଆ͔Β͸/PU/VMMΞϊςʔγϣϯ෇͍ͯ ΔͷʹOVMMΛ୅ೖͯ͠ΔΑXBSOJOH͕දࣔ͞Εͯ͠ ·͏ʂʂ +BWB
12. ७ਖ਼+,ίϯόʔλ͕ڧ੍తʹ /PO/VMMม׵͢Δ໰୊ Caused by: java.lang.IllegalArgumentException: Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull, parameter context at org.paradrops.sample.SampleClass.getText(SampleClass.kt) at org.paradrops.sample.Main2Activity.onCreate(Main2Activity.java:14) at android.app.Activity.performCreate(Activity.java:6664) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599) IllegalArgumentException: Parameter specified as non-null is null Ϋϥογϡͯ͠͠·͏ʂʂ
13. ७ਖ਼+,ίϯόʔλ͕ڧ੍తʹ /PO/VMMม׵͢Δ ɾ ਌$MBTT*OUFSGBDFBCTUSBDUΫϥεͳͲϝιο υΛܧঝPS࣮૷ͨ͠৔߹ɺҾ਺ʹ/VMMBCMFΞ ϊςʔγϣϯ͕ͳ͍৔߹͸+,͕/PO/VMMม׵ ͯ͠͠·͏
    ɾ ,PUMJO͸/PO/VMMɺ+BWB͸/VMMBCMF؀ڥʹͳͬ ͯ͠·͍ͱͯ΋Ϋϥογϡ͠΍͍͢
14. Ͳ͏ղܾ͢Δ͔ʁ
    ղܾࡦ͸ͲΜͳ΋ͷ͕͋Δ͔ʁ
15. ղܾҊ ɾ ख௚͠Ҋɿ֤Ҿ਺໭Γ஋ͷܕͷ/VMMBCMF /PO/VMM͕ਖ਼͍͔͠ɺ໨ࢹͰνΣοΫͯ͠ख ௚͢͠Δ
    ɾ શಈ࡞νΣοΫҊɿͱΓ͋͑ͣ,PUMJOԽͯ͠ ΞϓϦͷશಈ࡞νΣοΫͯ͠मਖ਼͢Δ
16. ͲͪΒ΋͵͘΋ΓҲΕ͍ͯΔର ԠͰͱͯ΋΍Γͨ͘ͳ͍
    ,PUMJOԽ͢Δͱߦͷίʔυ ม׵ͱ͔ී௨ʹ͋Δɻ
    ͦΕΛख࡞ۀͰमਖ਼ͨ͠ίʔυ ͷϨϏϡʔ͢Δͷ͸ਏ͗͢Δ
17. ͜͜·Ͱߟ͑ͯҰͭ
    ࢥ͍͖ͭ·ͨ͠
18. ,PUMJOͬͯ044ͩ͠
    ίϯόʔλΛվ଄͢Ε͹Α͍ ͷͰ͸ʜʁ
19. +BWB͸/VMMBCMF͕ඪ४ͩ͠ɺ ,PUJOଆ΋Ҿ਺ͱ໭Γ஋Λ /VMMBCMFʹ͢Ε͹͍͚ͦ͏
20. ΍ΔՁ஋͸͋Δ
21. +,ίϯόʔλΛ
    ΧελϚΠζ͢Δ
22. +,ίϯόʔλΧελϚΠζ· Ͱͷεςοϓ ɾ ,PUMJOͷ։ൃ؀ڥΛ༻ҙ͢Δ
    ɾ ,PUMJOͷ5ZQF$POWFSUFSLUΛฤू͢Δ
    ɾ ,PUMJOΛνϟΠϧυ*%&"࣮ߦ͢Δ
    ɾ ίʔυΛίϯόʔτͯ͠ΈΔ
23. ,PUMJOͷ։ൃ؀ڥΛ༻ҙ ɾ *OUFMMJ+
    *%&"
    
    ɾ +%,
    
    ɾ CSFX
    JOTUBMM
    BOU
    ɾ IUUQTHJUIVCDPN+FU#SBJOTLPUMJO
    ɾ ৄࡉ͸!TIJSBKJ͞ΜͷϒϩάهࣄͳͲͰ
    IUUQT TIJSBKJHJUIVCJPCMPHIPXUPLPOUSJCVUF WTFUVQ
24. ,PUMJOͷ5ZQF$POWFSUFSLUΛฤ ू͢Δ IUUQTHJUIVCDPN+FU#SBJOTLPUMJOCMPCNBTUFS KLTSDPSHKFUCSBJOTLPUMJOKL5ZQF$POWFSUFSLU fun variableNullability(variable: PsiVariable): Nullability = Nullability.Nullable fun methodNullability(method: PsiMethod): Nullability = Nullability.Nullable
25. ,PUMJOΛνϟΠϧυ*%&"࣮ߦ͢ Δ
26. ࣮ࡍʹ,PUMJOίʔυίϯόʔτ ͯ͠ΈΔ public interface SampleInterface { String getText(Context context); int getValue(Context context); } interface SampleInterface { fun getText(context: Context?): String? fun getValue(context: Context?): Int } /VMMBCMFͳ
    +BWBίʔυ
    ͩͬͨͷ͕ ͔ͬ͠Γͱ
    /VMMBCMFΛ
    อ࣋ͨ͠··
    ม׵͞Ε͍ͯΔ +BWB ,PUMJO
27. ࣮ࡍʹΧελϜ+,Ͱίϯόʔ τͨ͠ίʔυΛ࢖ͬͯΈΔ /VMMBCMFʹOVMMΛ୅ೖ͢Δͷ͸ී௨ͷ͜ͱͳͷͰ XBSOJOH͸ग़ͣɺΫϥογϡ΋͠ͳ͍
    ར༻͢Δ+BWBίʔυଆʹมߋΛՃ͑Δඞཁͳ͠
28. ͿͬͪΌ͚ΧελϜίϯόʔλ ͷ࢖༻ײͲ͏ʁ ɾ ࢖͍࢝Ίͨͷ͸ࠓ೥ͷࠒ
    ɾ ϦϦʔε➔Ϋϥογϡ➔IPUGJYͷܹݮ
    ɾ ίϯόʔλ͕ੜ੒͢Δίʔυʹ৴པײˠίʔ υϨϏϡʔͷ؆ૉԽ
    ɾ ,PUMJOԽ͕ؾܰʹͰ͖ΔΑ͏ʹ➔͜Εେࣄ
29. ͓·͚
30. ΧελϜ+,ίϯόʔλ΋ͬͯ ͖ͨΑ
31. ͓·͚ͷXJUI·Μ͕
    IUUQIFMQXJUIJT Q
    Α͔ͬͨΒಡΜͰΈͯͶ
    ແྉͩΑʂ ͠Ύͬͪΐ͏͹Μ
32. ͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ ͠Ύͬͪΐ͏͹Μ
33. XJUI͸"OESPJEΤϯδχΞΛେઈࢍืूதʂ
    ϕςϥϯ,PUMJOΤϯδχΞ͕αϙʔτ͢ΔͷͰ
    ॳ৺ऀͰ΋,PUMJOʹڵຯ͕͋ΔͳΒ
    ؾܰʹԠืͯ͠ΈͯͶʂ
    IUUQTXXXXBOUFEMZDPNQSPKFDUT ͠Ύͬͪΐ͏͹Μ