[COLLECTIONS-553] TransformedMultiValuedMap.equals() fails when comparing the value with itself

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0
• Fix Version/s: 4.1
• Component/s: Map
• Assignee: Unassigned
• Reporter: M Kim
• Created: 16/Feb/15 16:09
• Updated: 27/Nov/15 21:11
• Resolved: 07/Apr/15 11:41

Description

TransformedMultiValuedMap.equals() does not return true when comparing a value of a Collection key with itself. Is it allowed to put Collection as a key in TransformedMultiValuedMap at all? If not, I think it should be specified in the document. Or, equals() should be fixed accordingly.

Reproduce step

Test.java

public void test()
{
  TransformedMultiValuedMap map = TransformedMultiValuedMap.transformingMap((MultiValuedMap)new MultiValuedHashMap(),TransformerUtils.stringValueTransformer(),  TransformerUtils.stringValueTransformer());
  
  MultiValuedHashMap helperMap = new MultiValuedHashMap();
  helperMap.put("KEY", "Value");
  Collection key = helperMap.keySet();
  map.put(key, "Hi");
  Collection value = map.get(key);
  assertTrue("Contract failed: value.equals(value)", value.equals(value));
}

Issue Links

• is part of: COLLECTIONS-543 AbstractCollectionDecorator should not delegate equals and hashcode