Getting rid of java.util.Iterator -


my problem related java. don't java.util package because of optional methods. instance, don't that, when return list, have prevent user modify list; return list implements, say, interface unmodifiablelist (yes, know collections.unmodifiablelist(), many reasons, don't encapsulate list). on other hand, when given list external piece of code, list a1) unmodifiable, a2) modifiable side-effects on object returned me list, or a3) modifiable without side-effects, , b1) immutable (assuming elements in list immutable well) or b2) mutable , unsafe use key.

i can rewrite existing classes (just copy/paste java.util package) , introduce interfaces unmodifiablelist, modifiablelist, etc. without effort. however, have following problem: forall mechanism 

for (final object o: listofobjects) {   // }

which uses class java.lang.iterable, uses java.util.iterator.

so problem is, how should cope iterator class?

i have several possible solutions looking elegant.

  1. is possible make java use different class iterable forall loops?
  2. if not, possible mark java.util.iterator.remove() deprecated?
  3. also, possible customise ides (eclipse , netbeans) warn me every time use iterator?

my current plan define own iterator, extension of java.util.iterator, , mark remove() method deprecated. next, have script looking @ code , making sure java.util used (except in definition of own iterator). way, should safe.

edit: advises , links, guys. cheers.

i not go wisdom (or lack thereof) of replacing java.util.*, far iterable , iterator go:

  • you cannot replace iterable in foreach loops - it's practically hardcoded in java compiler.

  • the java specification allows throwing fine unsupportedoperationexception when optional operation is, well, unsupported. wrong that? if testsuite has proper coverage, know immediately, anyway. abstract implementations of several java interfaces (abstract*) throw exception unsupported operations default.

  • if code trying remove objects collection not support it, have greater problems deciding remove(). , if passing collections third-party code, will break if violate java interfaces.

  • you override remove() method nothing silence errors... if can take unexpected breakage in code expects removed items be removed.


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