How to write transient fields to a file in Android?












1















I am writing my POJO into a file using Gson. I need to benefit from a transient file to manage serialization/deserialization. When I make this field transient, I am unable to write/read it to/from a file. So this fault is originating from Gson settings or File structure in Android? Thanks in advance.




My Gson:




@Provides

    @Singleton

    Gson provideGson() {

        return new GsonBuilder()

                .setFieldNamingPolicy(FieldNamingPolicy.IDENTITY)

                .serializeNulls()

                .setLenient()

                .setDateFormat(Constants.GSON_DATE_FORMAT)

                .excludeFieldsWithoutExposeAnnotation()

                .create();

    }



Transient field in POJO




@Expose

private transient boolean pdfCreated; --> not visible in the file





java gson transient







share|improve this question




















  • 3





    But the transient keyword is used in Gson (or other serializers) to mark the field to not to be written to file or other serialization techniques. You're defeating the purpose of transient then. Why can't you remove the transient keyword if you want to serialize it?

    – Darwind
    Nov 27 '18 at 7:38






  • 1





    Thanks a lot, @Darwind and GhostCat now I understand its purpose. I confused by its usage. Thanks for illuminating me :)

    – nuhkoca
    Nov 27 '18 at 7:47











  • @GhostCat accepted your answer :)

    – nuhkoca
    Nov 27 '18 at 8:14











  • me, too! Thanks again!

    – nuhkoca
    Nov 27 '18 at 8:43
















1















I am writing my POJO into a file using Gson. I need to benefit from a transient file to manage serialization/deserialization. When I make this field transient, I am unable to write/read it to/from a file. So this fault is originating from Gson settings or File structure in Android? Thanks in advance.




My Gson:




@Provides

    @Singleton

    Gson provideGson() {

        return new GsonBuilder()

                .setFieldNamingPolicy(FieldNamingPolicy.IDENTITY)

                .serializeNulls()

                .setLenient()

                .setDateFormat(Constants.GSON_DATE_FORMAT)

                .excludeFieldsWithoutExposeAnnotation()

                .create();

    }



Transient field in POJO




@Expose

private transient boolean pdfCreated; --> not visible in the file





java gson transient







share|improve this question




















  • 3





    But the transient keyword is used in Gson (or other serializers) to mark the field to not to be written to file or other serialization techniques. You're defeating the purpose of transient then. Why can't you remove the transient keyword if you want to serialize it?

    – Darwind
    Nov 27 '18 at 7:38






  • 1





    Thanks a lot, @Darwind and GhostCat now I understand its purpose. I confused by its usage. Thanks for illuminating me :)

    – nuhkoca
    Nov 27 '18 at 7:47











  • @GhostCat accepted your answer :)

    – nuhkoca
    Nov 27 '18 at 8:14











  • me, too! Thanks again!

    – nuhkoca
    Nov 27 '18 at 8:43














1












1








1








I am writing my POJO into a file using Gson. I need to benefit from a transient file to manage serialization/deserialization. When I make this field transient, I am unable to write/read it to/from a file. So this fault is originating from Gson settings or File structure in Android? Thanks in advance.




My Gson:




@Provides

    @Singleton

    Gson provideGson() {

        return new GsonBuilder()

                .setFieldNamingPolicy(FieldNamingPolicy.IDENTITY)

                .serializeNulls()

                .setLenient()

                .setDateFormat(Constants.GSON_DATE_FORMAT)

                .excludeFieldsWithoutExposeAnnotation()

                .create();

    }



Transient field in POJO




@Expose

private transient boolean pdfCreated; --> not visible in the file





java gson transient







share|improve this question
















I am writing my POJO into a file using Gson. I need to benefit from a transient file to manage serialization/deserialization. When I make this field transient, I am unable to write/read it to/from a file. So this fault is originating from Gson settings or File structure in Android? Thanks in advance.




My Gson:




@Provides

    @Singleton

    Gson provideGson() {

        return new GsonBuilder()

                .setFieldNamingPolicy(FieldNamingPolicy.IDENTITY)

                .serializeNulls()

                .setLenient()

                .setDateFormat(Constants.GSON_DATE_FORMAT)

                .excludeFieldsWithoutExposeAnnotation()

                .create();

    }



Transient field in POJO




@Expose

private transient boolean pdfCreated; --> not visible in the file





java gson transient




java gson transient






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 27 '18 at 7:39









Darwind

5,81033443




5,81033443










asked Nov 27 '18 at 7:35









nuhkocanuhkoca

3081622




3081622








  • 3





    But the transient keyword is used in Gson (or other serializers) to mark the field to not to be written to file or other serialization techniques. You're defeating the purpose of transient then. Why can't you remove the transient keyword if you want to serialize it?

    – Darwind
    Nov 27 '18 at 7:38






  • 1





    Thanks a lot, @Darwind and GhostCat now I understand its purpose. I confused by its usage. Thanks for illuminating me :)

    – nuhkoca
    Nov 27 '18 at 7:47











  • @GhostCat accepted your answer :)

    – nuhkoca
    Nov 27 '18 at 8:14











  • me, too! Thanks again!

    – nuhkoca
    Nov 27 '18 at 8:43














  • 3





    But the transient keyword is used in Gson (or other serializers) to mark the field to not to be written to file or other serialization techniques. You're defeating the purpose of transient then. Why can't you remove the transient keyword if you want to serialize it?

    – Darwind
    Nov 27 '18 at 7:38






  • 1





    Thanks a lot, @Darwind and GhostCat now I understand its purpose. I confused by its usage. Thanks for illuminating me :)

    – nuhkoca
    Nov 27 '18 at 7:47











  • @GhostCat accepted your answer :)

    – nuhkoca
    Nov 27 '18 at 8:14











  • me, too! Thanks again!

    – nuhkoca
    Nov 27 '18 at 8:43








3




3





But the transient keyword is used in Gson (or other serializers) to mark the field to not to be written to file or other serialization techniques. You're defeating the purpose of transient then. Why can't you remove the transient keyword if you want to serialize it?

– Darwind
Nov 27 '18 at 7:38





But the transient keyword is used in Gson (or other serializers) to mark the field to not to be written to file or other serialization techniques. You're defeating the purpose of transient then. Why can't you remove the transient keyword if you want to serialize it?

– Darwind
Nov 27 '18 at 7:38




1




1





Thanks a lot, @Darwind and GhostCat now I understand its purpose. I confused by its usage. Thanks for illuminating me :)

– nuhkoca
Nov 27 '18 at 7:47





Thanks a lot, @Darwind and GhostCat now I understand its purpose. I confused by its usage. Thanks for illuminating me :)

– nuhkoca
Nov 27 '18 at 7:47













@GhostCat accepted your answer :)

– nuhkoca
Nov 27 '18 at 8:14





@GhostCat accepted your answer :)

– nuhkoca
Nov 27 '18 at 8:14













me, too! Thanks again!

– nuhkoca
Nov 27 '18 at 8:43





me, too! Thanks again!

– nuhkoca
Nov 27 '18 at 8:43












1 Answer
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active

oldest

votes


















2














A distinct non-answer here: you are going down the wrong rabbit hole.



Code communicates intent. So when you mark fields as transient, you are telling your human readers (and all Java tooling) that this field should not be written/read. Whatever value your code puts into that field, you said "I don't care about it, so forget about it when (de)serializing instances of that class".



Thus, the real answer is to step back and use such keywords/annotations the way they are intended to be used.






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    1 Answer
    1






    active

    oldest

    votes








    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    2














    A distinct non-answer here: you are going down the wrong rabbit hole.



    Code communicates intent. So when you mark fields as transient, you are telling your human readers (and all Java tooling) that this field should not be written/read. Whatever value your code puts into that field, you said "I don't care about it, so forget about it when (de)serializing instances of that class".



    Thus, the real answer is to step back and use such keywords/annotations the way they are intended to be used.






    share|improve this answer




























      2














      A distinct non-answer here: you are going down the wrong rabbit hole.



      Code communicates intent. So when you mark fields as transient, you are telling your human readers (and all Java tooling) that this field should not be written/read. Whatever value your code puts into that field, you said "I don't care about it, so forget about it when (de)serializing instances of that class".



      Thus, the real answer is to step back and use such keywords/annotations the way they are intended to be used.






      share|improve this answer


























        2












        2








        2







        A distinct non-answer here: you are going down the wrong rabbit hole.



        Code communicates intent. So when you mark fields as transient, you are telling your human readers (and all Java tooling) that this field should not be written/read. Whatever value your code puts into that field, you said "I don't care about it, so forget about it when (de)serializing instances of that class".



        Thus, the real answer is to step back and use such keywords/annotations the way they are intended to be used.






        share|improve this answer













        A distinct non-answer here: you are going down the wrong rabbit hole.



        Code communicates intent. So when you mark fields as transient, you are telling your human readers (and all Java tooling) that this field should not be written/read. Whatever value your code puts into that field, you said "I don't care about it, so forget about it when (de)serializing instances of that class".



        Thus, the real answer is to step back and use such keywords/annotations the way they are intended to be used.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 27 '18 at 8:11









        GhostCatGhostCat

        92.4k1688148




        92.4k1688148
































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