ModelMapper empty list demo

ModelMapperDemoEmptyList.java

build.gradle

ModelMapper empty list demo

ModelMapperDemoEmptyList.java

build.gradle

//package com.example;

import org.modelmapper.ModelMapper;

import java.util.LinkedList;
import java.util.List;

class ModelMapperDemoEmptyList {
    public static void main(String[] args) {
        ModelMapper modelMapper = new ModelMapper();

FooDTO fooDTO = createFooDTO();
        Foo foo = createFoo();

System.out.println("FooDTO before:");
        System.out.println(fooDTO + "\n");

System.out.println("Foo before:");
        System.out.println(foo + "\n");

modelMapper.map(fooDTO,foo);

System.out.println("Foo after:");
        System.out.println(foo + "\n");
    }

private static FooDTO createFooDTO() {
        FooDTO fooDTO = new FooDTO();
        fooDTO.setName("My foo DTO");

BarDTO barDTO = new BarDTO();
        barDTO.setName("My foo's bar");

barDTO.setJars(new LinkedList());

fooDTO.setBar(barDTO);

return fooDTO;
    }

private static Foo createFoo() {
        Foo foo = new Foo();
        foo.setName("My Foo");

Jar jar1 = new Jar();
        jar1.setName("Jar 1");

Jar jar2 = new Jar();
        jar2.setName("Jar 2");

List<Jar> jarList = new LinkedList<>();
        jarList.add(jar1);
        jarList.add(jar2);

Bar bar = new Bar();
        bar.setJars(jarList);

foo.setBar(bar);

return foo;
    }
}

class Foo {
    private String name;
    private Bar bar;

public String getName() {
        return name;
    }

public void setName(String name) {
        this.name = name;
    }

public Bar getBar() {
        return bar;
    }

public void setBar(Bar bar) {
        this.bar = bar;
    }

@Override
    public String toString() {
        return "Foo{" +
                "name='" + name + '\'' +
                ", bar=" + bar +
                '}';
    }
}

class Bar {
    private String name;
    private List<Jar> jars;

public String getName() {
        return name;
    }

public void setName(String name) {
        this.name = name;
    }

public List<Jar> getJars() {
        return jars;
    }

public void setJars(List<Jar> jars) {
        this.jars = jars;
    }

@Override
    public String toString() {
        return "Bar{" +
                "name='" + name + '\'' +
                ", jars=" + jars +
                '}';
    }
}

class Jar {
    private String name;

public String getName() {
        return name;
    }

public void setName(String name) {
        this.name = name;
    }

@Override
    public String toString() {
        return "Jar{" +
                "name='" + name + '\'' +
                '}';
    }
}

class FooDTO {
    private String name;
    private BarDTO bar;

public String getName() {
        return name;
    }

public void setName(String name) {
        this.name = name;
    }

public BarDTO getBar() {
        return bar;
    }

public void setBar(BarDTO bar) {
        this.bar = bar;
    }

@Override
    public String toString() {
        return "FooDTO{" +
                "name='" + name + '\'' +
                ", bar=" + bar +
                '}';
    }
}

class BarDTO {
    private String name;
    private List<JarDTO> jars;

public String getName() {
        return name;
    }

public void setName(String name) {
        this.name = name;
    }

public List<JarDTO> getJars() {
        return jars;
    }

public void setJars(List<JarDTO> jars) {
        this.jars = jars;
    }

@Override
    public String toString() {
        return "BarDTO{" +
                "name='" + name + '\'' +
                ", jars=" + jars +
                '}';
    }
}

class JarDTO {
    private String name;

public String getName() {
        return name;
    }

public void setName(String name) {
        this.name = name;
    }

@Override
    public String toString() {
        return "JarDTO{" +
                "name='" + name + '\'' +
                '}';
    }
}

STDIN

Output:

FooDTO before:
FooDTO{name='My foo DTO', bar=BarDTO{name='My foo's bar', jars=[]}}

Foo before:
Foo{name='My Foo', bar=Bar{name='null', jars=[Jar{name='Jar 1'}, Jar{name='Jar 2'}]}}

Foo after:
Foo{name='My foo DTO', bar=Bar{name='My foo's bar', jars=[Jar{name='Jar 1'}, Jar{name='Jar 2'}]}}