Tibor17 commented on pull request #703:
URL: https://github.com/apache/maven/pull/703#issuecomment-1085568686


   If we want to use immutable objects, we should use Java Records. We still do 
not have Valhalla ready.
   The developers often do not understand Java Memory Model and there is no 
guarantee that they would not make a mistake when they update any immutable 
object. The developers usually would not understand why ConcurrentLinkedQueue 
is preferable over ArrayList and `List.copyOf()` is ideal 
https://docs.oracle.com/javase/10/docs/api/java/util/List.html#copyOf(java.util.Collection),
 and so we should use `List.copyOf()` which means that we would switch the 
project to Java 10 - bad luck! Nobody would accept Java 10, I guess.
   
   The immutable object should be fetched with data in constructor via a 
builder.
   `MavenProject and MavenProjectBuilder composition`
   
   
   ```
   record MavenProject(MavenProjectBuilder builder) {
    
       public MavenProject {
           dependencies = List.copyOf(builder.getDependencies());
           ...
           ...
           ...
       }
   }
   ```


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