Update README.md

jackson-2/.gitignore

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+*.class
+
+#folders#
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+
+# Packaged files #
+*.jar
+*.war
+*.ear
+
+# Files
+/src/main/resources/orderOutput.yaml

jackson-2/README.md

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+## Jackson Cookbooks and Examples
+
+This module contains articles about Jackson.
+
+### The Course
+The "REST With Spring" Classes: http://bit.ly/restwithspring
+
+### Relevant Articles: 
+- [Mapping Multiple JSON Fields to a Single Java Field](https://www.baeldung.com/json-multiple-fields-single-java-field)
+- [How to Process YAML with Jackson](https://www.baeldung.com/jackson-yaml)
+- [Working with Tree Model Nodes in Jackson](https://www.baeldung.com/jackson-json-node-tree-model)
+- [Converting JSON to CSV in Java](https://www.baeldung.com/java-converting-json-to-csv)
+- [Compare Two JSON Objects with Jackson](https://www.baeldung.com/jackson-compare-two-json-objects)
+- [Calling Default Serializer from Custom Serializer in Jackson](https://www.baeldung.com/jackson-call-default-serializer-from-custom-serializer)
+- More articles: [[<-- prev]](/../jackson)

jackson-2/pom.xml

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+<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">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>jackson-2</artifactId>
+    <version>0.1-SNAPSHOT</version>
+    <name>jackson-2</name>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-java</relativePath>
+    </parent>
+
+    <dependencies>
+
+        <!-- marshalling -->
+
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+
+        <!-- YAML -->
+        <dependency>
+            <groupId>com.fasterxml.jackson.dataformat</groupId>
+            <artifactId>jackson-dataformat-yaml</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+        
+        <!-- CSV -->
+        <dependency>
+            <groupId>com.fasterxml.jackson.dataformat</groupId>
+            <artifactId>jackson-dataformat-csv</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>        
+
+        <!-- Allow use of LocalDate -->
+        <dependency>
+            <groupId>com.fasterxml.jackson.datatype</groupId>
+            <artifactId>jackson-datatype-jsr310</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+
+
+        <!-- test scoped -->
+
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>jackson-2</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+    </build>
+
+    <properties>
+
+        <!-- testing -->
+        <assertj.version>3.11.0</assertj.version>
+    </properties>
+
+</project>

jackson-2/src/main/java/com/baeldung/jackson/csv/JsonCsvConverter.java

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+package com.baeldung.jackson.csv;
+
+import java.io.File;
+import java.io.IOException;
+
+import com.baeldung.jackson.entities.OrderLine;
+import com.baeldung.jackson.mixin.OrderLineForCsv;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.MappingIterator;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import com.fasterxml.jackson.dataformat.csv.CsvMapper;
+import com.fasterxml.jackson.dataformat.csv.CsvSchema;
+import com.fasterxml.jackson.dataformat.csv.CsvSchema.Builder;
+
+public class JsonCsvConverter {
+    
+    public static void JsonToCsv(File jsonFile, File csvFile) throws IOException {
+        JsonNode jsonTree = new ObjectMapper().readTree(jsonFile);
+        
+        Builder csvSchemaBuilder = CsvSchema.builder();
+        JsonNode firstObject = jsonTree.elements().next();
+        firstObject.fieldNames().forEachRemaining(fieldName -> {csvSchemaBuilder.addColumn(fieldName);} );
+        CsvSchema csvSchema = csvSchemaBuilder
+            .build()
+            .withHeader();
+        
+        CsvMapper csvMapper = new CsvMapper();
+        csvMapper.writerFor(JsonNode.class)
+            .with(csvSchema)
+            .writeValue(csvFile, jsonTree);
+    }
+    
+    public static void csvToJson(File csvFile, File jsonFile) throws IOException {
+        CsvSchema orderLineSchema = CsvSchema.emptySchema().withHeader();
+        CsvMapper csvMapper = new CsvMapper();
+        MappingIterator<OrderLine> orderLines = csvMapper.readerFor(OrderLine.class)
+            .with(orderLineSchema)
+            .readValues(csvFile);
+        
+        new ObjectMapper()
+            .configure(SerializationFeature.INDENT_OUTPUT, true)
+            .writeValue(jsonFile, orderLines.readAll());
+    }
+
+    public static void JsonToFormattedCsv(File jsonFile, File csvFile) throws IOException {
+        CsvMapper csvMapper = new CsvMapper();
+        CsvSchema csvSchema = csvMapper
+            .schemaFor(OrderLineForCsv.class)
+            .withHeader();
+        csvMapper.addMixIn(OrderLine.class, OrderLineForCsv.class);
+        
+        OrderLine[] orderLines = new ObjectMapper()
+            .readValue(jsonFile, OrderLine[].class);
+        csvMapper.writerFor(OrderLine[].class)
+            .with(csvSchema)
+            .writeValue(csvFile, orderLines);
+    }
+}

jackson-2/src/main/java/com/baeldung/jackson/entities/File.java

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+package com.baeldung.jackson.entities;
+
+public class File {
+
+    private Long id;
+
+    private String name;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+}

jackson-2/src/main/java/com/baeldung/jackson/entities/Folder.java

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+package com.baeldung.jackson.entities;
+
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+
+public class Folder {
+
+    private Long id;
+
+    private String name;
+
+    private String owner;
+
+    private Date created;
+
+    private Date modified;
+
+    private Date lastAccess;
+
+    @JsonIgnore
+    private List<File> files = new ArrayList<>();
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getOwner() {
+        return owner;
+    }
+
+    public void setOwner(String owner) {
+        this.owner = owner;
+    }
+
+    public Date getCreated() {
+        return created;
+    }
+
+    public void setCreated(Date created) {
+        this.created = created;
+    }
+
+    public Date getModified() {
+        return modified;
+    }
+
+    public void setModified(Date modified) {
+        this.modified = modified;
+    }
+
+    public Date getLastAccess() {
+        return lastAccess;
+    }
+
+    public void setLastAccess(Date lastAccess) {
+        this.lastAccess = lastAccess;
+    }
+
+    public List<File> getFiles() {
+        return files;
+    }
+
+    public void setFiles(List<File> files) {
+        this.files = files;
+    }
+
+}

jackson-2/src/main/java/com/baeldung/jackson/entities/Order.java

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+package com.baeldung.jackson.entities;
+
+import java.time.LocalDate;
+import java.util.ArrayList;
+import java.util.List;
+
+public class Order {
+    private String orderNo;
+    private LocalDate date;
+    private String customerName;
+    private List<OrderLine> orderLines;
+
+    public Order() {
+
+    }
+
+    public Order(String orderNo, LocalDate date, String customerName, List<OrderLine> orderLines) {
+        super();
+        this.orderNo = orderNo;
+        this.date = date;
+        this.customerName = customerName;
+        this.orderLines = orderLines;
+    }
+
+    public String getOrderNo() {
+        return orderNo;
+    }
+
+    public void setOrderNo(String orderNo) {
+        this.orderNo = orderNo;
+    }
+
+    public LocalDate getDate() {
+        return date;
+    }
+
+    public void setDate(LocalDate date) {
+        this.date = date;
+    }
+
+    public String getCustomerName() {
+        return customerName;
+    }
+
+    public void setCustomerName(String customerName) {
+        this.customerName = customerName;
+    }
+
+    public List<OrderLine> getOrderLines() {
+        if (orderLines == null) {
+            orderLines = new ArrayList<>();
+        }
+        return orderLines;
+    }
+
+    public void setOrderLines(List<OrderLine> orderLines) {
+        if (orderLines == null) {
+            orderLines = new ArrayList<>();
+        }
+        this.orderLines = orderLines;
+    }
+
+    @Override
+    public String toString() {
+        return "Order [orderNo=" + orderNo + ", date=" + date + ", customerName=" + customerName + ", orderLines=" + orderLines + "]";
+    }
+
+}

jackson-2/src/main/java/com/baeldung/jackson/entities/OrderLine.java

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+package com.baeldung.jackson.entities;
+
+import java.math.BigDecimal;
+
+public class OrderLine {
+    private String item;
+    private int quantity;
+    private BigDecimal unitPrice;
+    
+    public OrderLine() {
+        
+    }
+
+    public OrderLine(String item, int quantity, BigDecimal unitPrice) {
+        super();
+        this.item = item;
+        this.quantity = quantity;
+        this.unitPrice = unitPrice;
+    }
+
+    public String getItem() {
+        return item;
+    }
+
+    public void setItem(String item) {
+        this.item = item;
+    }
+
+    public int getQuantity() {
+        return quantity;
+    }
+
+    public void setQuantity(int quantity) {
+        this.quantity = quantity;
+    }
+
+    public BigDecimal getUnitPrice() {
+        return unitPrice;
+    }
+
+    public void setUnitPrice(BigDecimal unitPrice) {
+        this.unitPrice = unitPrice;
+    }
+
+    @Override
+    public String toString() {
+        return "OrderLine [item=" + item + ", quantity=" + quantity + ", unitPrice=" + unitPrice + "]";
+    }
+}

jackson-2/src/main/java/com/baeldung/jackson/entities/Weather.java

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+package com.baeldung.jackson.entities;
+
+import com.fasterxml.jackson.annotation.JsonAlias;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class Weather {
+
+    @JsonProperty("location")
+    @JsonAlias("place")
+    private String location;
+
+    @JsonProperty("temp")
+    @JsonAlias("temperature")
+    private int temp;
+
+    @JsonProperty("outlook")
+    @JsonAlias("weather")
+    private String outlook;
+
+    public String getLocation() {
+        return location;
+    }
+
+    public void setLocation(String location) {
+        this.location = location;
+    }
+
+    public int getTemp() {
+        return temp;
+    }
+
+    public void setTemp(int temp) {
+        this.temp = temp;
+    }
+
+    public String getOutlook() {
+        return outlook;
+    }
+
+    public void setOutlook(String outlook) {
+        this.outlook = outlook;
+    }
+
+}

jackson-2/src/main/java/com/baeldung/jackson/mixin/OrderLineForCsv.java

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+package com.baeldung.jackson.mixin;
+
+import java.math.BigDecimal;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+@JsonPropertyOrder({
+    "count",
+    "name"
+})
+public abstract class OrderLineForCsv {
+    
+    @JsonProperty("name")
+    private String item; 
+    
+    @JsonProperty("count")
+    private int quantity; 
+    
+    @JsonIgnore
+    private BigDecimal unitPrice;
+    
+
+}

jackson-2/src/main/java/com/baeldung/jackson/node/JsonNodeIterator.java

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+package com.baeldung.jackson.node;
+
+import java.util.Iterator;
+import java.util.Map.Entry;
+
+import com.fasterxml.jackson.databind.JsonNode;
+
+public class JsonNodeIterator {
+    
+    private static final String NEW_LINE = "\n";
+    private static final String FIELD_DELIMITER = ": ";
+    private static final String ARRAY_PREFIX = "- ";
+    private static final String YAML_PREFIX = "  ";
+    
+    public String toYaml(JsonNode root) {
+        StringBuilder yaml = new StringBuilder();
+        processNode(root, yaml, 0);
+        return yaml.toString();
+    }
+
+    private void processNode(JsonNode jsonNode, StringBuilder yaml, int depth) {
+        if (jsonNode.isValueNode()) {
+            yaml.append(jsonNode.asText());
+        }
+        else if (jsonNode.isArray()) {
+            for (JsonNode arrayItem : jsonNode) {
+                appendNodeToYaml(arrayItem, yaml, depth, true);
+            }
+        }
+        else if (jsonNode.isObject()) {
+            appendNodeToYaml(jsonNode, yaml, depth, false);
+        }
+    }
+    
+    private void appendNodeToYaml(JsonNode node, StringBuilder yaml, int depth, boolean isArrayItem) {
+        Iterator<Entry<String, JsonNode>> fields = node.fields();
+        boolean isFirst = true;
+        while (fields.hasNext()) {
+            Entry<String, JsonNode> jsonField = fields.next();
+            addFieldNameToYaml(yaml, jsonField.getKey(), depth, isArrayItem && isFirst);
+            processNode(jsonField.getValue(), yaml, depth+1);
+            isFirst = false;
+        }
+        
+    }
+
+private void addFieldNameToYaml(StringBuilder yaml, String fieldName, int depth, boolean isFirstInArray) {
+    if (yaml.length()>0) {
+        yaml.append(NEW_LINE);
+        int requiredDepth = (isFirstInArray) ? depth-1 : depth;
+        for(int i = 0; i < requiredDepth; i++) {
+            yaml.append(YAML_PREFIX);
+        }
+        if (isFirstInArray) {
+            yaml.append(ARRAY_PREFIX);
+        }
+    }
+    yaml.append(fieldName);
+    yaml.append(FIELD_DELIMITER);
+}
+
+}

jackson-2/src/main/java/com/baeldung/jackson/serialization/custom/serializer/FolderBeanSerializerModifier.java

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+package com.baeldung.jackson.serialization.custom.serializer;
+
+import com.baeldung.jackson.entities.Folder;
+import com.fasterxml.jackson.databind.BeanDescription;
+import com.fasterxml.jackson.databind.JsonSerializer;
+import com.fasterxml.jackson.databind.SerializationConfig;
+import com.fasterxml.jackson.databind.ser.BeanSerializerModifier;
+
+public class FolderBeanSerializerModifier extends BeanSerializerModifier {
+
+    @Override
+    public JsonSerializer<?> modifySerializer(SerializationConfig config, BeanDescription beanDesc, JsonSerializer<?> serializer) {
+
+        if (beanDesc.getBeanClass().equals(Folder.class)) {
+            return new FolderSerializerWithDefaultSerializerStored((JsonSerializer<Object>) serializer);
+        }
+
+        return serializer;
+    }
+
+}

jackson-2/src/main/java/com/baeldung/jackson/serialization/custom/serializer/FolderSerializer.java

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+package com.baeldung.jackson.serialization.custom.serializer;
+
+import java.io.IOException;
+
+import com.baeldung.jackson.entities.File;
+import com.baeldung.jackson.entities.Folder;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+
+public class FolderSerializer extends StdSerializer<Folder> {
+
+    public FolderSerializer() {
+        super(Folder.class);
+    }
+
+    @Override
+    public void serialize(Folder value, JsonGenerator gen, SerializerProvider provider) throws IOException {
+
+        gen.writeStartObject();
+        gen.writeStringField("name", value.getName());
+
+        gen.writeArrayFieldStart("files");
+        for (File file : value.getFiles()) {
+            gen.writeStartObject();
+            gen.writeNumberField("id", file.getId());
+            gen.writeStringField("name", file.getName());
+            gen.writeEndObject();
+        }
+        gen.writeEndArray();
+
+        gen.writeEndObject();
+
+    }
+
+}

jackson-2/src/main/java/com/baeldung/jackson/serialization/custom/serializer/FolderSerializerWithCallingOwnSerializer.java

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+package com.baeldung.jackson.serialization.custom.serializer;
+
+import java.io.IOException;
+
+import com.baeldung.jackson.entities.Folder;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+
+public class FolderSerializerWithCallingOwnSerializer extends StdSerializer<Folder> {
+
+    public FolderSerializerWithCallingOwnSerializer() {
+        super(Folder.class);
+    }
+
+    @Override
+    public void serialize(Folder value, JsonGenerator gen, SerializerProvider provider) throws IOException {
+
+        gen.writeStartObject();
+        gen.writeStringField("name", value.getName());
+
+        provider.defaultSerializeField("files", value.getFiles(), gen);
+
+        provider.defaultSerializeField("details", value, gen);
+
+        gen.writeEndObject();
+
+    }
+
+}

jackson-2/src/main/java/com/baeldung/jackson/serialization/custom/serializer/FolderSerializerWithDefaultSerializerStored.java

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+package com.baeldung.jackson.serialization.custom.serializer;
+
+import java.io.IOException;
+
+import com.baeldung.jackson.entities.Folder;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.JsonSerializer;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+
+public class FolderSerializerWithDefaultSerializerStored extends StdSerializer<Folder> {
+
+    private final JsonSerializer<Object> defaultSerializer;
+
+    public FolderSerializerWithDefaultSerializerStored(JsonSerializer<Object> defaultSerializer) {
+        super(Folder.class);
+        this.defaultSerializer = defaultSerializer;
+    }
+
+    @Override
+    public void serialize(Folder value, JsonGenerator gen, SerializerProvider provider) throws IOException {
+
+        gen.writeStartObject();
+        gen.writeStringField("name", value.getName());
+
+        provider.defaultSerializeField("files", value.getFiles(), gen);
+
+        gen.writeFieldName("details");
+        defaultSerializer.serialize(value, gen, provider);
+
+        gen.writeEndObject();
+
+    }
+
+}

jackson-2/src/main/java/com/baeldung/jackson/serialization/custom/serializer/FolderSerializerWithInternalObjectMapper.java

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+package com.baeldung.jackson.serialization.custom.serializer;
+
+import java.io.IOException;
+
+import com.baeldung.jackson.entities.Folder;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+
+public class FolderSerializerWithInternalObjectMapper extends StdSerializer<Folder> {
+
+    public FolderSerializerWithInternalObjectMapper() {
+        super(Folder.class);
+    }
+
+    @Override
+    public void serialize(Folder value, JsonGenerator gen, SerializerProvider provider) throws IOException {
+
+        gen.writeStartObject();
+        gen.writeStringField("name", value.getName());
+
+        // we access internal mapper to delegate the serialization of File list  
+        ObjectMapper mapper = (ObjectMapper) gen.getCodec();
+
+        gen.writeFieldName("files");
+        String stringValue = mapper.writeValueAsString(value.getFiles());
+        gen.writeRawValue(stringValue);
+
+        gen.writeEndObject();
+
+    }
+
+}

jackson-2/src/main/java/com/baeldung/jackson/serialization/custom/serializer/FolderSerializerWithSerializerProvider.java

@@ -0,0 +1,29 @@
+package com.baeldung.jackson.serialization.custom.serializer;
+
+import java.io.IOException;
+
+import com.baeldung.jackson.entities.Folder;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+
+public class FolderSerializerWithSerializerProvider extends StdSerializer<Folder> {
+
+    public FolderSerializerWithSerializerProvider() {
+        super(Folder.class);
+    }
+
+    @Override
+    public void serialize(Folder value, JsonGenerator gen, SerializerProvider provider) throws IOException {
+
+        gen.writeStartObject();
+        gen.writeStringField("name", value.getName());
+
+        // we delegate the File list serialization to its default serializer
+        provider.defaultSerializeField("files", value.getFiles(), gen);
+
+        gen.writeEndObject();
+
+    }
+
+}

jackson-2/src/main/resources/logback.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

jackson-2/src/main/resources/orderInput.yaml

@@ -0,0 +1,11 @@
+orderNo: A001
+date: 2019-04-17
+customerName: Customer, Joe
+orderLines:
+    - item: No. 9 Sprockets
+      quantity: 12
+      unitPrice: 1.23
+    - item: Widget (10mm)
+      quantity: 4
+      unitPrice: 3.45
+      

jackson-2/src/main/resources/orderLines.csv

@@ -0,0 +1,3 @@
+item,quantity,unitPrice
+"No. 9 Sprockets",12,1.23
+"Widget (10mm)",4,3.45

jackson-2/src/main/resources/orderLines.json

@@ -0,0 +1,9 @@
+[ {
+  "item" : "No. 9 Sprockets",
+  "quantity" : 12,
+  "unitPrice" : 1.23
+}, {
+  "item" : "Widget (10mm)",
+  "quantity" : 4,
+  "unitPrice" : 3.45
+} ]

jackson-2/src/test/java/com/baeldung/jackson/csv/CsvUnitTest.java

@@ -0,0 +1,54 @@
+package com.baeldung.jackson.csv;
+
+import static org.junit.Assert.assertEquals;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.util.List;
+
+import org.junit.Test;
+
+import com.fasterxml.jackson.core.JsonParseException;
+import com.fasterxml.jackson.databind.JsonMappingException;
+import com.google.common.io.Files;
+
+
+public class CsvUnitTest {
+
+    @Test
+    public void givenJsonInput_thenWriteCsv() throws JsonParseException, JsonMappingException, IOException {
+        JsonCsvConverter.JsonToCsv(new File("src/main/resources/orderLines.json"), 
+            new File("src/main/resources/csvFromJson.csv"));
+        
+        assertEquals(readFile("src/main/resources/csvFromJson.csv"),
+            readFile("src/test/resources/expectedCsvFromJson.csv"));
+    }
+    
+    @Test
+    public void givenCsvInput_thenWritesJson() throws JsonParseException, JsonMappingException, IOException {
+        JsonCsvConverter.csvToJson(new File("src/main/resources/orderLines.csv"), 
+            new File("src/main/resources/jsonFromCsv.json"));
+        
+        assertEquals(readFile("src/main/resources/jsonFromCsv.json"),
+            readFile("src/test/resources/expectedJsonFromCsv.json"));
+        
+    }
+    
+    @Test
+    public void givenJsonInput_thenWriteFormattedCsvOutput() throws JsonParseException, JsonMappingException, IOException {
+        JsonCsvConverter.JsonToFormattedCsv(new File("src/main/resources/orderLines.json"), 
+            new File("src/main/resources/formattedCsvFromJson.csv"));
+
+        assertEquals(readFile("src/main/resources/formattedCsvFromJson.csv"),
+            readFile("src/test/resources/expectedFormattedCsvFromJson.csv"));
+        
+    }
+    
+    private List<String> readFile(String filename) throws IOException {
+        return Files.readLines(new File(filename), Charset.forName("utf-8"));
+    }
+    
+    
+}
+;

jackson-2/src/test/java/com/baeldung/jackson/deserialization/jsonalias/JsonAliasUnitTest.java

@@ -0,0 +1,38 @@
+package com.baeldung.jackson.deserialization.jsonalias;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import com.baeldung.jackson.entities.Weather;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+public class JsonAliasUnitTest {
+
+    @Test
+    public void givenTwoJsonFormats_whenDeserialized_thenWeatherObjectsCreated() throws Exception {
+
+        ObjectMapper mapper = new ObjectMapper();
+
+        Weather weather = mapper.readValue("{" + 
+            "\"location\": \"London\"," + 
+            "\"temp\": 15," + 
+            "\"weather\": \"Cloudy\"" + 
+            "}", Weather.class);
+
+        assertEquals("London", weather.getLocation());
+        assertEquals("Cloudy", weather.getOutlook());
+        assertEquals(15, weather.getTemp());
+
+        weather = mapper.readValue("{" + 
+            "\"place\": \"Lisbon\"," + 
+            "\"temperature\": 35," + 
+            "\"outlook\": \"Sunny\"" + 
+            "}", Weather.class);
+
+        assertEquals("Lisbon", weather.getLocation());
+        assertEquals("Sunny", weather.getOutlook());
+        assertEquals(35, weather.getTemp());
+
+    }
+}

jackson-2/src/test/java/com/baeldung/jackson/json/compare/JsonCompareUnitTest.java

@@ -0,0 +1,126 @@
+package com.baeldung.jackson.json.compare;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.Comparator;
+
+import org.junit.Test;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.NumericNode;
+import com.fasterxml.jackson.databind.node.TextNode;
+
+public class JsonCompareUnitTest {
+
+    @Test
+    public void givenTwoSameJsonDataObjects_whenCompared_thenAreEqual() throws IOException {
+        ObjectMapper mapper = new ObjectMapper();
+
+        String s1 = "{\"employee\": {\"id\": \"1212\",\"fullName\": \"John Miles\", \"age\": 34 }}";
+        String s2 = "{\"employee\": {\"id\": \"1212\",\"age\": 34, \"fullName\": \"John Miles\" }}";
+
+        JsonNode actualObj1 = mapper.readTree(s1);
+        JsonNode actualObj2 = mapper.readTree(s2);
+
+        assertEquals(actualObj1, actualObj2);
+
+    }
+
+    @Test
+    public void givenTwoSameNestedJsonDataObjects_whenCompared_thenEqual() throws IOException {
+        ObjectMapper mapper = new ObjectMapper();
+
+        String s1 = "{\"employee\": {\"id\": \"1212\",\"fullName\": \"John Miles\",\"age\": 34, \"contact\":{\"email\": \"john@xyz.com\",\"phone\": \"9999999999\"} }}";
+        String s2 = "{\"employee\": {\"id\": \"1212\",\"fullName\": \"John Miles\",\"age\": 34, \"contact\":{\"email\": \"john@xyz.com\",\"phone\": \"9999999999\"} }}";
+
+        JsonNode actualObj1 = mapper.readTree(s1);
+        JsonNode actualObj2 = mapper.readTree(s2);
+
+        assertEquals(actualObj1, actualObj2);
+
+    }
+
+    @Test
+    public void givenTwoSameListJsonDataObjects_whenCompared_thenEqual() throws IOException {
+        ObjectMapper mapper = new ObjectMapper();
+
+        String s1 = "{\"employee\": {\"id\": \"1212\",\"fullName\": \"John Miles\",\"age\": 34, \"skills\":[\"Java\", \"C++\", \"Python\"] }}";
+        String s2 = "{\"employee\": {\"id\": \"1212\",\"fullName\": \"John Miles\",\"age\": 34, \"skills\":[\"Java\", \"C++\", \"Python\"] }}";
+
+        JsonNode actualObj1 = mapper.readTree(s1);
+        JsonNode actualObj2 = mapper.readTree(s2);
+
+        assertEquals(actualObj1, actualObj2);
+
+    }
+
+    @Test
+    public void givenTwoJsonDataObjects_whenComparedUsingCustomNumericNodeComparator_thenEqual() throws IOException {
+        ObjectMapper mapper = new ObjectMapper();
+
+        String s1 = "{\"name\": \"John\",\"score\":5.0}";
+        String s2 = "{\"name\": \"John\",\"score\":5}";
+        JsonNode actualObj1 = mapper.readTree(s1);
+        JsonNode actualObj2 = mapper.readTree(s2);
+
+        NumericNodeComparator cmp = new NumericNodeComparator();
+
+        assertNotEquals(actualObj1, actualObj2);
+        assertTrue(actualObj1.equals(cmp, actualObj2));
+
+    }
+    
+    public class NumericNodeComparator implements Comparator<JsonNode> {
+        @Override
+        public int compare(JsonNode o1, JsonNode o2) {
+            if (o1.equals(o2)) {
+                return 0;
+            }
+            if ((o1 instanceof NumericNode) && (o2 instanceof NumericNode)) {
+                Double d1 = ((NumericNode) o1).asDouble();
+                Double d2 = ((NumericNode) o2).asDouble();
+                if (d1.compareTo(d2) == 0) {
+                    return 0;
+                }
+            }
+            return 1;
+        }
+    }
+    
+    @Test
+    public void givenTwoJsonDataObjects_whenComparedUsingCustomTextNodeComparator_thenEqual() throws IOException {
+        ObjectMapper mapper = new ObjectMapper();
+
+        String s1 = "{\"name\": \"JOHN\",\"score\":5}";
+        String s2 = "{\"name\": \"John\",\"score\":5}";
+        JsonNode actualObj1 = mapper.readTree(s1);
+        JsonNode actualObj2 = mapper.readTree(s2);
+
+        TextNodeComparator cmp = new TextNodeComparator();
+
+        assertNotEquals(actualObj1, actualObj2);
+        assertTrue(actualObj1.equals(cmp, actualObj2));
+
+    }
+    
+    public class TextNodeComparator implements Comparator<JsonNode> {
+        @Override
+        public int compare(JsonNode o1, JsonNode o2) {
+            if (o1.equals(o2)) {
+                return 0;
+            }
+            if ((o1 instanceof TextNode) && (o2 instanceof TextNode)) {
+                String s1 = ((TextNode) o1).asText();
+                String s2 = ((TextNode) o2).asText();
+                if (s1.equalsIgnoreCase(s2)) {
+                    return 0;
+                }
+            }
+            return 1;
+        }
+    }
+}

jackson-2/src/test/java/com/baeldung/jackson/node/ExampleStructure.java

@@ -0,0 +1,18 @@
+package com.baeldung.jackson.node;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+public class ExampleStructure {
+    private static ObjectMapper mapper = new ObjectMapper();
+
+    static JsonNode getExampleRoot() throws IOException {
+        InputStream exampleInput = ExampleStructure.class.getClassLoader()
+            .getResourceAsStream("node_example.json");
+        JsonNode rootNode = mapper.readTree(exampleInput);
+        return rootNode;
+    }
+}

jackson-2/src/test/java/com/baeldung/jackson/node/JsonNodeIteratorUnitTest.java

@@ -0,0 +1,37 @@
+package com.baeldung.jackson.node;
+
+import static org.junit.Assert.assertEquals;
+
+import java.io.IOException;
+
+import org.junit.Test;
+
+import com.fasterxml.jackson.databind.JsonNode;
+
+public class JsonNodeIteratorUnitTest {
+
+    private JsonNodeIterator onTest = new JsonNodeIterator();
+    private static String expectedYaml = "name: \n" + 
+        "  first: Tatu\n" + 
+        "  last: Saloranta\n" + 
+        "title: Jackson founder\n" + 
+        "company: FasterXML\n" + 
+        "pets: \n" + 
+        "- type: dog\n" + 
+        "  number: 1\n" + 
+        "- type: fish\n" + 
+        "  number: 50";
+    
+@Test
+public void givenANodeTree_whenIteratingSubNodes_thenWeFindExpected() throws IOException {
+    final JsonNode rootNode = ExampleStructure.getExampleRoot();
+    
+    String yaml = onTest.toYaml(rootNode);
+    System.out.println(yaml.toString());
+
+    assertEquals(expectedYaml, yaml);
+    
+}
+
+
+}

jackson-2/src/test/java/com/baeldung/jackson/node/NodeBean.java

@@ -0,0 +1,30 @@
+package com.baeldung.jackson.node;
+
+public class NodeBean {
+    private int id;
+    private String name;
+
+    public NodeBean() {
+    }
+
+    public NodeBean(int id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

jackson-2/src/test/java/com/baeldung/jackson/node/NodeOperationUnitTest.java

@@ -0,0 +1,119 @@
+package com.baeldung.jackson.node;
+
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+import org.junit.Test;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+public class NodeOperationUnitTest {
+    private static ObjectMapper mapper = new ObjectMapper();
+
+    @Test
+    public void givenAnObject_whenConvertingIntoNode_thenCorrect() {
+        final NodeBean fromValue = new NodeBean(2016, "baeldung.com");
+
+        final JsonNode node = mapper.valueToTree(fromValue);
+
+        assertEquals(2016, node.get("id")
+            .intValue());
+        assertEquals("baeldung.com", node.get("name")
+            .textValue());
+    }
+
+    @Test
+    public void givenANode_whenWritingOutAsAJsonString_thenCorrect() throws IOException {
+        final String pathToTestFile = "node_to_json_test.json";
+        final char[] characterBuffer = new char[50];
+
+        final JsonNode node = mapper.createObjectNode();
+        ((ObjectNode) node).put("id", 2016);
+        ((ObjectNode) node).put("name", "baeldung.com");
+
+        try (FileWriter outputStream = new FileWriter(pathToTestFile)) {
+            mapper.writeValue(outputStream, node);
+        }
+
+        try (FileReader inputStreamForAssertion = new FileReader(pathToTestFile)) {
+            inputStreamForAssertion.read(characterBuffer);
+        }
+        final String textContentOfTestFile = new String(characterBuffer);
+
+        assertThat(textContentOfTestFile, containsString("2016"));
+        assertThat(textContentOfTestFile, containsString("baeldung.com"));
+
+        Files.delete(Paths.get(pathToTestFile));
+    }
+
+    @Test
+    public void givenANode_whenConvertingIntoAnObject_thenCorrect() throws JsonProcessingException {
+        final JsonNode node = mapper.createObjectNode();
+        ((ObjectNode) node).put("id", 2016);
+        ((ObjectNode) node).put("name", "baeldung.com");
+
+        final NodeBean toValue = mapper.treeToValue(node, NodeBean.class);
+
+        assertEquals(2016, toValue.getId());
+        assertEquals("baeldung.com", toValue.getName());
+    }
+
+    @Test
+    public void givenANode_whenAddingIntoATree_thenCorrect() throws IOException {
+        final JsonNode rootNode = ExampleStructure.getExampleRoot();
+        final ObjectNode addedNode = ((ObjectNode) rootNode).putObject("address");
+        addedNode.put("city", "Seattle")
+            .put("state", "Washington")
+            .put("country", "United States");
+
+        assertFalse(rootNode.path("address")
+            .isMissingNode());
+        assertEquals("Seattle", rootNode.path("address")
+            .path("city")
+            .textValue());
+        assertEquals("Washington", rootNode.path("address")
+            .path("state")
+            .textValue());
+        assertEquals("United States", rootNode.path("address")
+            .path("country")
+            .textValue());
+    }
+
+    @Test
+    public void givenANode_whenModifyingIt_thenCorrect() throws IOException {
+        final String newString = "{\"nick\": \"cowtowncoder\"}";
+        final JsonNode newNode = mapper.readTree(newString);
+
+        final JsonNode rootNode = ExampleStructure.getExampleRoot();
+        ((ObjectNode) rootNode).set("name", newNode);
+
+        assertFalse(rootNode.path("name")
+            .path("nick")
+            .isMissingNode());
+        assertEquals("cowtowncoder", rootNode.path("name")
+            .path("nick")
+            .textValue());
+    }
+
+    @Test
+    public void givenANode_whenRemovingFromATree_thenCorrect() throws IOException {
+        final JsonNode rootNode = ExampleStructure.getExampleRoot();
+        ((ObjectNode) rootNode).remove("company");
+
+        assertTrue(rootNode.path("company")
+            .isMissingNode());
+    }
+
+}

jackson-2/src/test/java/com/baeldung/jackson/serialization/custom/serializer/CallingDefaultSerializerUnitTest.java

@@ -0,0 +1,166 @@
+package com.baeldung.jackson.serialization.custom.serializer;
+
+import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.io.IOException;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import com.baeldung.jackson.entities.File;
+import com.baeldung.jackson.entities.Folder;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.module.SimpleModule;
+
+public class CallingDefaultSerializerUnitTest {
+
+    private ObjectMapper mapper;
+    private Folder mockFolder;
+    private TypeReference<HashMap<String, Object>> mapType;
+
+    @Before
+    public void setup() {
+
+        mapType = new TypeReference<HashMap<String, Object>>() {
+        };
+
+        mapper = new ObjectMapper();
+
+        mockFolder = new Folder();
+        mockFolder.setId(1L);
+        mockFolder.setName("Root Folder");
+        mockFolder.setOwner("root");
+        mockFolder.setCreated(Date.from(Instant.now().minusSeconds(60)));
+        mockFolder.setModified(Date.from(Instant.now().minusSeconds(30)));
+        mockFolder.setLastAccess(Date.from(Instant.now()));
+
+        File file1 = new File();
+        file1.setId(1L);
+        file1.setName("File 1");
+
+        File file2 = new File();
+        file2.setId(2L);
+        file2.setName("File 2");
+
+        List<File> files = new ArrayList<>();
+        files.add(file1);
+        files.add(file2);
+        mockFolder.setFiles(files);
+
+    }
+
+    @Test
+    public void givenFolder_whenSerialized_onlyNameAndFilesFieldsSerialized() throws IOException {
+
+        SimpleModule module = new SimpleModule();
+        module.addSerializer(new FolderSerializer());
+        mapper.registerModule(module);
+
+        String json = mapper.writeValueAsString(mockFolder);
+
+        HashMap<String, Object> actual = mapper.readValue(json, mapType);
+
+        assertTrue(actual.containsKey("name"));
+        assertTrue(actual.containsKey("files"));
+        assertEquals(mockFolder.getName(), actual.get("name"));
+
+        List actualFiles = (List) actual.get("files");
+        assertEquals(mockFolder.getFiles().size(), actualFiles.size());
+        
+    }
+
+    @Test
+    public void givenFolder_whenSerializedWithSerializerProvider_onlyNameAndFilesFieldsSerialized() throws IOException {
+
+        SimpleModule module = new SimpleModule();
+        module.addSerializer(new FolderSerializerWithSerializerProvider());
+        mapper.registerModule(module);
+
+        String json = mapper.writeValueAsString(mockFolder);
+
+        HashMap<String, Object> actual = mapper.readValue(json, mapType);
+
+        assertTrue(actual.containsKey("name"));
+        assertTrue(actual.containsKey("files"));
+        assertEquals(mockFolder.getName(), actual.get("name"));
+
+        List actualFiles = (List) actual.get("files");
+        assertEquals(mockFolder.getFiles().size(), actualFiles.size());
+
+    }
+
+    @Test
+    public void givenFolder_whenSerializedWithInternalObjectMapper_onlyNameAndFilesFieldsSerialized() throws IOException {
+
+        SimpleModule module = new SimpleModule();
+        module.addSerializer(new FolderSerializerWithInternalObjectMapper());
+        mapper.registerModule(module);
+
+        String json = mapper.writeValueAsString(mockFolder);
+
+        HashMap<String, Object> actual = mapper.readValue(json, mapType);
+
+        assertTrue(actual.containsKey("name"));
+        assertTrue(actual.containsKey("files"));
+        assertEquals(mockFolder.getName(), actual.get("name"));
+
+        List actualFiles = (List) actual.get("files");
+        assertEquals(mockFolder.getFiles().size(), actualFiles.size());
+
+    }
+
+    @Test(expected = StackOverflowError.class)
+    public void givenFolder_whenSerializedWithCallingOwnSerializer_exceptionOccured() throws IOException {
+
+        SimpleModule module = new SimpleModule();
+        module.addSerializer(new FolderSerializerWithCallingOwnSerializer());
+        mapper.registerModule(module);
+
+        mapper.writeValueAsString(mockFolder);
+        
+    }
+
+    @Test
+    public void givenFolder_whenSerializedWithDefaultSerializerStored_NameAndFilesAndDetailsFieldsSerialized() throws IOException {
+
+        SimpleModule module = new SimpleModule();
+        module.setSerializerModifier(new FolderBeanSerializerModifier());
+        mapper.registerModule(module);
+
+        String json = mapper.writeValueAsString(mockFolder);
+        
+        HashMap<String, Object> actual = mapper.readValue(json, mapType);
+
+        assertTrue(actual.containsKey("name"));
+        assertTrue(actual.containsKey("files"));
+        assertEquals(mockFolder.getName(), actual.get("name"));
+
+        List actualFiles = (List) actual.get("files");
+        assertEquals(mockFolder.getFiles().size(), actualFiles.size());
+        
+        Map actualDetails = (Map) actual.get("details");
+        assertTrue(actualDetails.containsKey("id"));
+        assertTrue(actualDetails.containsKey("name"));
+        assertTrue(actualDetails.containsKey("owner"));
+        assertTrue(actualDetails.containsKey("created"));
+        assertTrue(actualDetails.containsKey("modified"));
+        assertTrue(actualDetails.containsKey("lastAccess"));
+        
+        assertEquals(mockFolder.getId().longValue(), ((Number)actualDetails.get("id")).longValue());
+        assertEquals(mockFolder.getName(), actualDetails.get("name"));
+        assertEquals(mockFolder.getOwner(), actualDetails.get("owner"));
+        assertEquals(mockFolder.getCreated(), new Date((long) actualDetails.get("created")));
+        assertEquals(mockFolder.getModified(), new Date((long) actualDetails.get("modified")));
+        assertEquals(mockFolder.getLastAccess(), new Date((long) actualDetails.get("lastAccess")));
+
+    }
+
+}

jackson-2/src/test/java/com/baeldung/jackson/yaml/YamlUnitTest.java

@@ -0,0 +1,63 @@
+package com.baeldung.jackson.yaml;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.io.File;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import com.baeldung.jackson.entities.Order;
+import com.baeldung.jackson.entities.OrderLine;
+import com.fasterxml.jackson.core.JsonGenerationException;
+import com.fasterxml.jackson.core.JsonParseException;
+import com.fasterxml.jackson.databind.JsonMappingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
+import com.fasterxml.jackson.dataformat.yaml.YAMLGenerator.Feature;
+
+public class YamlUnitTest {
+    private ObjectMapper mapper;
+
+    @Before
+    public void setup() {
+        mapper = new ObjectMapper(new YAMLFactory().disable(Feature.WRITE_DOC_START_MARKER));
+        mapper.findAndRegisterModules();
+        mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
+    }
+
+    @Test
+    public void givenYamlInput_ObjectCreated() throws JsonParseException, JsonMappingException, IOException {
+        Order order = mapper.readValue(new File("src/main/resources/orderInput.yaml"), Order.class);
+        assertEquals("A001", order.getOrderNo());
+        assertEquals(LocalDate.parse("2019-04-17", DateTimeFormatter.ISO_DATE), order.getDate());
+        assertEquals("Customer, Joe", order.getCustomerName());
+        assertEquals(2, order.getOrderLines()
+            .size());
+    }
+
+    @Test
+    public void givenYamlObject_FileWritten() throws JsonGenerationException, JsonMappingException, IOException {
+        List<OrderLine> lines = new ArrayList<>();
+        lines.add(new OrderLine("Copper Wire (200ft)", 1, new BigDecimal(50.67).setScale(2, RoundingMode.HALF_UP)));
+        lines.add(new OrderLine("Washers (1/4\")", 24, new BigDecimal(.15).setScale(2, RoundingMode.HALF_UP)));
+        Order order = new Order(
+            "B-9910", 
+            LocalDate.parse("2019-04-18", DateTimeFormatter.ISO_DATE), 
+            "Customer, Jane", 
+            lines);
+        mapper.writeValue(new File("src/main/resources/orderOutput.yaml"), order);
+
+        File outputYaml = new File("src/main/resources/orderOutput.yaml");
+        assertTrue(outputYaml.exists());
+    }
+}

jackson-2/src/test/resources/expectedCsvFromJson.csv

@@ -0,0 +1,3 @@
+item,quantity,unitPrice
+"No. 9 Sprockets",12,1.23
+"Widget (10mm)",4,3.45

jackson-2/src/test/resources/expectedFormattedCsvFromJson.csv

@@ -0,0 +1,3 @@
+count,name
+12,"No. 9 Sprockets"
+4,"Widget (10mm)"

jackson-2/src/test/resources/expectedJsonFromCsv.json

@@ -0,0 +1,9 @@
+[ {
+  "item" : "No. 9 Sprockets",
+  "quantity" : 12,
+  "unitPrice" : 1.23
+}, {
+  "item" : "Widget (10mm)",
+  "quantity" : 4,
+  "unitPrice" : 3.45
+} ]

jackson-2/src/test/resources/node_example.json

@@ -0,0 +1,18 @@
+{
+    "name": {
+        "first": "Tatu",
+        "last": "Saloranta"
+    },
+    "title": "Jackson founder",
+    "company": "FasterXML",
+    "pets": [
+        {
+            "type": "dog",
+            "number": 1
+        },
+        {
+            "type": "fish",
+            "number": 50
+        }
+    ]
+}