Java collection/map apply method equivalent?

Question

I would like to apply a function to a Java collection, in this particular case a map. Is there a nice way to do this? I have a map and would like to just run trim() on all t

Answer 1

I have come up with a "Mapper" class

public static abstract class Mapper {

    private Collection source;

    // Mapping methods
    public abstract ToClass map(FromClass source);

    // Constructors
    public Mapper(Collection source) {
        this.source = source;
    }   
    public Mapper(FromClass ... source) {
        this.source = Arrays.asList(source);
    }   

    // Apply map on every item
    public Collection apply() {
        ArrayList result = new ArrayList();
        for (FromClass item : this.source) {
            result.add(this.map(item));
        }
        return result;
    }
}

That I use like that :

Collection loaders = new Mapper(files) {
    @Override public Loader map(File source) {
        return new Loader(source);
    }           
}.apply();