How to wrap each object of a Collection in Java? -

i have class foo made equivalence wrapper class wrappedfoo change equals() contract in parts of program.

i need convert foo objects wrappedfoo objects , vice versa in many places. need convert collections of foos , wrappedfoo 1 another. there way can achieve in generic way?

basically want method this:

public static collection<wrappedfoo> wrapcollection(collection<foo> collection) 

the problem don't know kind of collection implementation used , wish keep same implementation resulting collection.

using reflection api, (notice 0 in method name):

public static collection<wrapperfoo> wrapcollection0(collection<foo> src) {     try     {         class<? extends collection> clazz = src.getclass();         collection dst = clazz.newinstance();         (foo foo : src)         {             dst.add(new wrapperfoo(foo));         }         return dst;     } catch(exception e)     {         e.printstacktrace();         return null;     } } 

now implement whole bunch one-liner overload methods using method above (notice 0 in calls):

public static arraylist<wrapperfoo> wrapcollection(arraylist<foo> src) {     return (arraylist<wrapperfoo>) wrapcollection0(src); }  public static vector<wrapperfoo> wrapcollection(vector<foo> src) {     return (vector<wrapperfoo>) wrapcollection0(src); }  ...