Get value from HashMap attribute

[matej spac]

Hi, I can´t get value from attribute object of type LinkedHashMap.

I have got this 2 attributes:
1. LinkedHashMap<Integer, String> object saved under name "manufacturers"
2. JavaBean object saved under name "product" with some properties

I try following in my JSP:

1. ${applicationScope.manufacturers}  // This returns in JSP {1=Value1, 2=Value2, 3=Value3, 4=Value4, 5=Value5}. This is OK.
2. ${product.manufacturer}            // This returns int value of manufacturer. This is OK too.

But I want to get values from LinkedHashMap based on ${product.manufacturer} value as a key. When I try to do it with:

a. ${applicationScope.manufacturers[product.manufacturer]}
b. ${applicationScope.manufacturers[pageScope.product.manufacturer]}
c. ${applicationScope.manufacturers[product['manufacturer']]}
d. ${applicationScope['manufacturers'].product['manufacturer']}

it is not working, nothing is returned.
Separately both attributes is returned (with all kind of syntax above), but when I combine them, something goes wrong.

What am I doing wrong?

[matej spac]

Actually even ${applicationScope.manufacturers[1]} did not work.
So I change map from LinkedHashMap<Integer, String> to type LinkedHashMap<Long, String>.
Now at least ${applicationScope.manufacturers[1]} works and return "Value1" as expected.

But ${applicationScope.manufacturers[product.manufacturer]} still not working

[matej spac]

Nice talk

I found problem:

${applicationScope.manufacturers} refers to LinkedHashMap<Long, String>
${product.manufacturer} refers to variable of type int

So ${applicationScope.manufacturers[product.manufacturer]} returns nothing.

I change type of variable ${product.manufacturer} from int to Long and now it is working