Data Weave Pojo to Pojo Mappings - mule

Question

I am trying to do a Pojo to Pojo transformation as below( each Pojo has a List of objects) - the output is transformed but is skipping an object - sample code below.
public class Pojo1 implements Serializable {
private List<Foo> fooList =new ArrayList<Foo>(1);
public Pojo1() {
}
public List<Foo> getFooList() {
return fooList ;
}
public void setFooList(List<Foo> fooList) {
this.fooList= fooList;
}
}
public class Pojo2 implements Serializable {
private List<Bar> barList =new ArrayList<Bar>(1);
public Pojo2() {
}
public List<Bar> getBarList() {
return barList ;
}
public void setBarList(List<Bar> barList) {
this.barList= barList;
}
}
DataWeave transformation as follows - this works fine but only one object in the List gets transformed and I'm missing the second one.
barList: [{
(
payload.fooList map {
item1:$.item1
}
)
} as :object {
class :"com.fooClass"
}]
} as :object {
class : "com.barClass"
}
Thanks in advance !

Answer 1

Try with
{
barList: in1.fooList map {
item1: $.item1
} as :object {class : "com.fooClass"}
} as :object {class : "com.barClass"}
Note: as :object {class : "com.fooClass"} should be optional, as it can be inferred
The problem seems to be that you defined an array with only one object and filled that object with the result of:
payload.fooList map {
item1:$.item1
}
Which is an array of objects:
[
{
item1: "value1"
},
{
item1: "value2"
}
]
After filling the object with that, it ends up like:
{
item1: "value1",
item1: "value2",
item1: ...
}
So, you are filling the array with an object with a lot of duplicated fields (with different values) and when that output is written (since it's java) each one of those fields only get one value.