Pineapple jam is so popular among Indonesian, matter of fact in every big celebration such as Eid ul Fitr or Xmas people make pineapple cookies. So I can almost guarantee most of them know how to make pineapple jam.
It's very easy to make, you don't need to measure anything, it only calls for 2 ingredients .. pineapple and sugar that's all! you don't need to use pectin.
1 Pineapple, peeled, cored and cut into big pieces
1 cup sugar (or more)
Blend or processed the pineapple using electric blender or food processors
Heat the pineapple with sugar in a non coated pan in medium low heat, continually stir the mixture until reaching jam consistency you desired.
If making this for regular everyday jam, I like using blender so the end result would be really smooth. But if you make it for pineapple cookies, I'd recommend using regular manual cheese shredder, and cook it until really thick.