Jsonp coding dojo

{
  "name": "John Doe",
  "age": 29,
  "siblings": ["Jane Doe", "Herry Doe"],
  "address": {
    "city": "Budapest",
    "street": "Deak Square"
  },
  "alive": false,
  "description": null
}

{
  "name": "John Doe", // < String
  "age": 29, // < Number
  "siblings": ["Jane Doe", "Herry Doe"], // < Array
  "address": {
      "city": "Budapest",
      "street": "Deak Square"
  }, // < Object
  "alive": false, // < true/false
  "description": null // < null
}

PROGRAMMING MODELS
object model
streaming model

PACKAGE: JAVAX.JSON
reader interface
writer interface
model builder interface

PACKAGE: JAVAX.JSON.STREAM
parser interface
generator interface

Docs:
https://docs.oracle.com/javaee/7/api/javax/json/package-
summary.html

EXERCISE 1:
Olvassunk be json modelt stringből Használjunk hozzá
StringReader-t és JsonReader-t
Fordításhoz használjuk a Glassfish implementációt:
org.glassfish; javax.json; 1.0.4
http://mvnrepository.com/artifact/org.glassfish/javax.json/1.0.4

<!?xml version="1.0" encoding="UTF8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.
  <modelversion>4.0.0</modelversion>
  <groupid>hu.huog.jsonp</groupid>
  <artifactid>exercises</artifactid>
  <version>1.0SNAPSHOT</version>
  <packaging>jar</packaging>
  <build>
      <plugins>
          <plugin>
              <groupid>org.apache.maven.plugins</groupid>
              <artifactid>mavenjarplugin</artifactid>
              <configuration>
                  <archive>
                      <manifest>
                          <mainclass>Exercise00</mainclass>
                          <addclasspath>true</addclasspath>
                      </manifest>
                  </archive>

</configuration>
          </plugin>
      </plugins>
  </build>
  <dependencies>
      <dependency>
          <groupid>org.glassfish</groupid>
          <artifactid>javax.json</artifactid>
          <version>1.0.4</version>
      </dependency>
  </dependencies>
</project>

import javax.json.Json;
import javax.json.JsonReader;
import javax.json.JsonStructure;
import java.io.StringReader;
public class Exercise01 {
    private static final String jsonString = "{ "name": "John Snow"}"
    public static void main(String[] args) {
        JsonReader reader = Json.createReader(new StringReader(jsonString));
        JsonStructure jsonst = reader.read();
        reader.close();
        System.out.println("json: " + jsonst);
    }
}

EXERCISE 2:
Készítsünk json modelt builder segítségével és írjuk ki
stringbe Használjunk JsonObjectBuilder-t,
JsonArrayBuilder-t, JsonWriter-t, StringWriter-t

import javax.json.JsonObject;
import javax.json.JsonWriter;
import java.io.StringWriter;
        JsonObject model = Json.createObjectBuilder()
            .add("firstName", "Duke")
            .add("lastName", "Java")
            .add("age", 18)
            .add("streetAddress", "100 Internet Dr")
            .add("city", "JavaTown")
            .add("state", "JA")
            .add("postalCode", "12345")
            .add("phoneNumbers", Json.createArrayBuilder()
            .add(Json.createObjectBuilder()
            .add("type", "mobile")
            .add("number", "1111111111"))
            .add(Json.createObjectBuilder()

.add("type", "home")
            .add("number", "2222222222")))
            .build();
        StringWriter strWriter = new StringWriter();
        JsonWriter jsonWriter = Json.createWriter(strWriter);
        jsonWriter.writeObject(model);
        jsonWriter.close();
        String jsonStr = strWriter.toString();
        System.out.println("json: " + jsonStr);
    }
}

EXERCISE 3:
Parsoljunk json stringet és irassuk ki a parse eventeket
Használjunk JsonParser-t

import javax.json.stream.JsonParser;
import java.io.StringReader;
    private static final String jsonString = "{ "name": "John Snow"}"
        JsonParser parser = Json.createParser(new StringReader(jsonString));
        while (parser.hasNext()) {
            JsonParser.Event event = parser.next();
            switch(event) {
                case START_ARRAY:
                case END_ARRAY:
                case START_OBJECT:
                case END_OBJECT:
                case VALUE_FALSE:
                case VALUE_NULL:
                case VALUE_TRUE:

System.out.println(event.toString());
                    break;
                case KEY_NAME:
                    System.out.print(event.toString() + " " +
                    parser.getString() + " ");
                    break;
                case VALUE_STRING:
                case VALUE_NUMBER:
                    System.out.println(event.toString() + " " +
                    parser.getString());
                    break;
            }
        }
    }
}

EXERCISE 4:
Készítsünk JSON stringet geerátor segítségével Használjunk
JsonGenerator-t, StringWriter-t

import javax.json.stream.JsonGenerator;
import java.io.StringWriter;
        StringWriter writer = new StringWriter();
        JsonGenerator gen = Json.createGenerator(writer);
        gen.writeStartObject()
            .write("firstName", "Duke")
            .write("lastName", "Java")
            .write("age", 18)
            .write("streetAddress", "100 Internet Dr")
            .write("city", "JavaTown")
            .write("state", "JA")
            .write("postalCode", "12345")
            .writeStartArray("phoneNumbers")
            .writeStartObject()
            .write("type", "mobile")
            .write("number", "1111111111")

.writeEnd()
            .writeStartObject()
            .write("type", "home")
            .write("number", "2222222222")
            .writeEnd()
            .writeEnd()
            .writeEnd();
        gen.close();
        String jsonString = writer.toString();
        System.out.println("json:" + jsonString);
    }
}

JSR374 (JSON PROCESSING 1.1)
wget http://download.oracle.com/otn-pub/jcp/json_p-
1_1-edr-spec/jsonp-1.1-edr1-sources.zip
wget http://download.oracle.com/otn-pub/jcp/json_p-
1_1-edr-spec/jsonp-1.1-edr1-javadoc.zip
http://download.oracle.com/otndocs/jcp/json_p-1_1-edr-
spec/index.html

RESOURCES:
https://docs.oracle.com/javaee/7/api/javax/json/package-
summary.html
https://docs.oracle.com/javaee/7/tutorial/jsonp.htm
http://www.jcp.org/en/jsr/detail?id=353
http://www.jcp.org/en/jsr/detail?id=374
https://github.com/google/gson
https://github.com/FasterXML/jackson

Jsonp coding dojo

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Jsonp coding dojo