JSON and HATEOAS Report: Data Validation and RESTful Web Services

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Contents
Introduction......................................................................................................................................2
Description of JSON validation approaches....................................................................................3
Description of HATEOAS approach...............................................................................................4
Completion of tasks and Assistance statement................................................................................5
Conclusion.......................................................................................................................................9
References......................................................................................................................................10
Figure 1: JSON................................................................................................................................4
Figure 2: Output 1............................................................................................................................5
Figure 3: Output 2............................................................................................................................5
Figure 4: Output 3............................................................................................................................6
Figure 5: Output 4............................................................................................................................6
Figure 6: A.......................................................................................................................................6
Figure 7: B.......................................................................................................................................7
Figure 8: C.......................................................................................................................................7
Figure 9: D.......................................................................................................................................8
Figure 10: E.....................................................................................................................................8

Introduction
The report contains a description of the approaches of the validations of JSON as well as a
description of HATEOAS. There are many screenshots which are attached in the report and
described them thoroughly. The database of the system is also attached in the report.

Description of JSON validation approaches
JSON schema is a specification type of JSON which is format dependent for the structure
definition of the data of JSON. The schema of JSON is written in the draft of IETF which get
expired on the year 2011. The schema of JSON provides the description of the format that
already exists and provides help in the development of the documentation of human- machine
that is readable. The approaches validations of the JSON are mentioned in detail in this part of
the document (Baazizi et al., 2017).
First is the development of the object of key and value map with the help of JSON input. This
approach is used by the Jackson Object Mapper which helps in validation of the pair of the key
which is done individually and this particular approach helps when every single pair of the key,
as well as value, get validated properly as well as individually. The approach used whenever the
list of flat inputs of every single pair of key as well as a value which resembles each other.
Another is the creation of the Data transfer object that is the domain from inputs that is given by
the JSON. This approach uses Object Mapper where the code is used for checking the validations
so that used object can be verified. But when the failure is observed in JSON to object mapping
then the overall system gets failed. This is the most dangerous drawback (Afsari et al., 2017).
The last one is the creation of the custom code of the developed validation. This approach
provides the JSON input as the string is parsed with custom code which is built in order to show
the validations. The approach is plausible as the custom of JSON gets developed and many
validation routines are getting complexes (Bennara et al., 2014).

Figure 1: JSON
Description of HATEOAS approach
Hypermedia as the Engine of Application State is the full form of the HATEOAS which is
another approach which provides help for building the services related to the RESTful that are
web related where the client find the actions that are dynamic and is available for the server at
the runtime. Users get the URL to start and to standardize the media type. For once the URL gets
the application of state of the future when the state of transitions will be drive by the client
selection from the choices which is provided by the servers. There exist multiple options which
are available and are based on the clients for controlling the access and the data that is recorded
by actions that were performed previously. Other constraints of HATEOAS are essential that
contains the interface feature which is uniform and even and also REST feature included. The
HATEOAS defined with the help of an author that was one of the major parts of writing the
principle of the specifications of the HTTP named as Roy Fielding and he is the co-founder as
well of the project that is based on the Apache server of HTTP. He stated that the interfaces of
the application programming will not drive the hypertext then RESTful is not capable of
controlling it (Schreibmann and Braun, 2014).

Completion of tasks and Assistance statement
After the completion of the task, various screenshots are provided here that will assist the overall
work.
Figure 2: Output 1
This the sign up screen that is shown above and user need to enter the username as well as the
password for signing in the system.
Figure 3: Output 2
This screenshot shows that the user can create a post by entering the name and post in the given
field and there is an option of edit as well.

Figure 4: Output 3
The status which needs to enter can be written in the text area that is provided and then the status
will be uploaded.
Figure 5: Output 4
There are four different options that are available and displayed in this screenshot that are a
dashboard, create a post, post history, and log out. And on the rightmost corner, the user can
check the details by clicking on the drop down that is provided.
Figure 6: A
This is the screenshot of the database that is created and here the tables are displayed in the form
of a screenshot.

Figure 7: B
This is another table whose data is shown in this screenshot.
Figure 8: C
This is the screenshot of the table that is displaying the details of the table.

Figure 9: D
This is another table that is showing the details.
Figure 10: E
This screenshot is displaying all the columns that are available.

Conclusion
This report consists of a thorough discussion of the JSON approaches that are used for
validations as well as for HATEOAS. The report has a various screenshot of the output as well as
of the database that is created and explanation is provided after every screenshot.

References
Bennara, M., Mrissa, M. and Amghar, Y., 2014, April. An approach for composing RESTful linked services on the
web. In Proceedings of the 23rd International Conference on World Wide Web (pp. 977-982). ACM.
Schreibmann, V. and Braun, P., 2014. Design and Implementation of a Model-Driven Approach for Restful APIs.
In IEEE GSC.
Baazizi, M.A., Lahmar, H.B., Colazzo, D., Ghelli, G. and Sartiani, C., 2017, March. Schema inference for massive
JSON datasets. In Extending Database Technology (EDBT).
Afsari, K., Eastman, C.M. and Castro-Lacouture, D., 2017. JavaScript Object Notation (JSON) data serialization for
IFC schema in web-based BIM data exchange. Automation in Construction, 77, pp.24-51.