Simple object-oriented Java API for JSON transformation. It is a wrapper around JSON-P.
From values
new JsonArr<>(
true,
"a",
1,
new JsonArr(),
new JsonObj()
);or from a string
new JsonArr(
new StringReader("[false,\"x\",1,[],{}]")
);or from JSON-P array
new JsonArr<>(
Json.createArrayBuilder().add(0).build()
);From object attributes
new JsonObj(
new Attr<>("bool", true),
new Attr<>("str", "a"),
new Attr<>("num", 0),
new Attr<>("arr", new JsonArr()),
new Attr<>("obj", new JsonObj())
);or from a string
new JsonObj(
new StringReader(
"{\"bool\":false,\"str\":\"A\",\"num\":1,\"arr\":[],\"obj\":{}}"
)
);or from JSON-P object
new JsonObj(
Json.createObjectBuilder().add("name", "John").build()
);Transforming JSON arrays (with help of Cactoos library)
In the example, numerical values are filtered and mapped to string values
JsonArr<Integer> array = new JsonArr<>(
10,
20
);
new JsonArr<>(
new Mapped<>(
elem -> elem + " points",
new Filtered<>(
elem -> elem > 15,
array.value()
)
)
).jsonValue().toString();The result is array ["20 points"].
In the example, value of num attribute is multiplied by 2.
JsonObj object = new JsonObj(
new Attr<>("str", "A"),
new Attr<>("num", 1)
);
new FitValUpd(
"num",
(object.<Integer>get("num")) * 2
).make(object).jsonValue().toString();The result is object {"str":"A","num":2}.
In the example, attribute with name delete is removed and attribute
with name info is replaced with attribute "moreInfo" and value true.
JsonObj object = new JsonObj(
new Attr<>("delete", "private"),
new Attr<>("info", "public info")
);
new FitChain<>(
new FitAttrDel("delete"),
new FitAttrRepl("info", new Attr<>("moreInfo", true))
).make(object).jsonValue().toString();The result is object {"moreInfo":true}.
Library supports JSON specification.
Please, note the library is still in early development and it's API can frequently change.
To get started, add dependency to your project:
<dependency>
<groupId>com.github.piotrkot</groupId>
<artifactId>oojson</artifactId>
<version>1.6.6</version>
</dependency>You may need to add JSON-P dependency:
<dependency>
<groupId>javax.json</groupId>
<artifactId>javax.json-api</artifactId>
<version>1.1.4</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.glassfish</groupId>
<artifactId>javax.json</artifactId>
<version>1.1.4</version>
<scope>runtime</scope>
</dependency>Feel free to fork me on GitHub, report bugs or post comments.
For Pull Requests, please run mvn clean package, first.
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