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From "Romain Manni-Bucau (JIRA)" <>
Subject [jira] [Resolved] (JOHNZON-124) JsonArrayImpl should not override equals method
Date Tue, 06 Jun 2017 08:07:18 GMT


Romain Manni-Bucau resolved JOHNZON-124.
       Resolution: Fixed
         Assignee: Romain Manni-Bucau
    Fix Version/s: 1.1.2

The equals implementation is now portable but still checks JsonArray type since otherwise
it breaks the equals contract and it is compatible with the spec wording (this means your
test will not work until you use a JsonArray as list which is "required" by the spec to have
an array).

> JsonArrayImpl should not override equals method
> -----------------------------------------------
>                 Key: JOHNZON-124
>                 URL:
>             Project: Johnzon
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 1.0.0
>            Reporter: Kaloyan Spiridonov
>            Assignee: Romain Manni-Bucau
>             Fix For: 1.1.2
> According to javadoc the equals method of JsonArray should be inherited from List.  The
javadoc of java.util.List.equals(Object o) says:
> {quote}
> Compares the specified object with this list for equality. Returns true if and only if
the specified object is also a list, both lists have the same size, and all corresponding
pairs of elements in the two lists are equal. (Two elements e1 and e2 are equal if (e1==null
? e2==null : e1.equals(e2)).) In other words, two lists are defined to be equal if they contain
the same elements in the same order. This definition ensures that the equals method works
properly across different implementations of the List interface.
> {quote}
> The following code:
> {code}
> JsonReader reader = Json.createReader(new StringReader("[true]"));
> 	    JsonArray jsonArray = reader.readArray();
>     	List<JsonValue> actList = jsonArray;
>     	List<JsonValue> list = new ArrayList<JsonValue>();
>      	list.add(JsonValue.TRUE);
>     	System.out.println(actList.equals(list));
> {code}
> should return true instead of false.
> One fix will be just to remove the equals method from JsonArrayImpl and then the AbstractList<E>.equals(Object
paramObject) will be used.

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