BAEL-3458 | Jsoniter parsing API examples (eugenp#8508)

Author: rdevarakonda

json-2/README.md

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+## JSON
+
+This module contains articles about JSON.
+
+### Relevant Articles:

json-2/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <groupId>com.baeldung</groupId>
+    <artifactId>json-2</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+
+    <parent>
+        <artifactId>parent-modules</artifactId>
+        <groupId>com.baeldung</groupId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.jsoniter</groupId>
+            <artifactId>jsoniter</artifactId>
+            <version>${jsoniter.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>${junit.version}</version>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj-core.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+    <properties>
+        <jsoniter.version>0.9.23</jsoniter.version>
+        <assertj-core.version>3.11.1</assertj-core.version>
+    </properties>
+</project>

json-2/src/main/java/com/baeldung/jsoniter/model/Name.java

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+package com.baeldung.jsoniter.model;
+
+public class Name {
+    private String firstName;
+    private String surname;
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getSurname() {
+        return surname;
+    }
+
+    public void setSurname(String surname) {
+        this.surname = surname;
+    }
+}

json-2/src/main/java/com/baeldung/jsoniter/model/Student.java

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+package com.baeldung.jsoniter.model;
+
+import com.jsoniter.annotation.JsonProperty;
+import com.jsoniter.fuzzy.MaybeStringIntDecoder;
+
+public class Student {
+    @JsonProperty(decoder = MaybeStringIntDecoder.class)
+    private int id;
+    private Name name;
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public Name getName() {
+        return name;
+    }
+
+    public void setName(Name name) {
+        this.name = name;
+    }
+}

json-2/src/test/java/com/baeldung/jsoniter/JsoniterIntroUnitTest.java

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+package com.baeldung.jsoniter;
+
+import com.baeldung.jsoniter.model.Name;
+import com.baeldung.jsoniter.model.Student;
+import com.jsoniter.JsonIterator;
+import com.jsoniter.ValueType;
+import com.jsoniter.any.Any;
+
+import org.junit.Test;
+
+import static com.jsoniter.ValueType.STRING;
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class JsoniterIntroUnitTest {
+
+    @Test
+    public void whenParsedUsingBindAPI_thenConvertedToJavaObjectCorrectly() {
+        String input = "{\"id\":1,\"name\":{\"firstName\":\"Joe\",\"surname\":\"Blogg\"}}";
+
+        Student student = JsonIterator.deserialize(input, Student.class);
+
+        assertThat(student.getId()).isEqualTo(1);
+        assertThat(student.getName().getFirstName()).isEqualTo("Joe");
+        assertThat(student.getName().getSurname()).isEqualTo("Blogg");
+    }
+
+    @Test
+    public void givenTypeInJsonFuzzy_whenFieldIsMaybeDecoded_thenFieldParsedCorrectly() {
+        String input = "{\"id\":\"1\",\"name\":{\"firstName\":\"Joe\",\"surname\":\"Blogg\"}}";
+
+        Student student = JsonIterator.deserialize(input, Student.class);
+
+        assertThat(student.getId()).isEqualTo(1);
+    }
+
+    @Test
+    public void whenParsedUsingAnyAPI_thenFieldValueCanBeExtractedUsingTheFieldName() {
+        String input = "{\"id\":1,\"name\":{\"firstName\":\"Joe\",\"surname\":\"Blogg\"}}";
+
+        Any any = JsonIterator.deserialize(input);
+
+        assertThat(any.toInt("id")).isEqualTo(1);
+        assertThat(any.toString("name", "firstName")).isEqualTo("Joe");
+        assertThat(any.toString("name", "surname")).isEqualTo("Blogg");
+    }
+
+    @Test
+    public void whenParsedUsingAnyAPI_thenFieldValueTypeIsCorrect() {
+        String input = "{\"id\":1,\"name\":{\"firstName\":\"Joe\",\"surname\":\"Blogg\"}}";
+
+        Any any = JsonIterator.deserialize(input);
+
+        assertThat(any.get("id").valueType()).isEqualTo(ValueType.NUMBER);
+        assertThat(any.get("name").valueType()).isEqualTo(ValueType.OBJECT);
+        assertThat(any.get("error").valueType()).isEqualTo(ValueType.INVALID);
+    }
+
+    @Test
+    public void whenParsedUsingIteratorAPI_thenFieldValuesExtractedCorrectly() throws Exception {
+        Name name = new Name();
+        String input = "{ \"firstName\" : \"Joe\", \"surname\" : \"Blogg\" }";
+        JsonIterator iterator = JsonIterator.parse(input);
+
+        for (String field = iterator.readObject(); field != null; field = iterator.readObject()) {
+            switch (field) {
+                case "firstName":
+                    if (iterator.whatIsNext() == ValueType.STRING) {
+                        name.setFirstName(iterator.readString());
+                    }
+                    continue;
+                case "surname":
+                    if (iterator.whatIsNext() == ValueType.STRING) {
+                        name.setSurname(iterator.readString());
+                    }
+                    continue;
+                default:
+                    iterator.skip();
+            }
+        }
+
+        assertThat(name.getFirstName()).isEqualTo("Joe");
+        assertThat(name.getSurname()).isEqualTo("Blogg");
+    }
+
+}

json-2/src/test/resources/Student.json

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+{"id":1,"name":{"firstName": "Joe", "surname":"Blogg"}}

pom.xml

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                 <module>jooby</module>
                 <module>jsf</module>
                 <module>json</module>
+                <module>json-2</module>
                 <module>json-path</module>
                 <module>jsoup</module>
                 <module>jta</module>