// equalshashcode/ComposedEquality.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;

class Part {
 String ss;
 double dd;
 Part(String ss, double dd) {
 this.ss = ss;
 this.dd = dd;
 }
 @Override
 public boolean equals(Object rval) {
 return rval instanceof Part &&
 Objects.equals(ss, ((Part)rval).ss) &&
 Objects.equals(dd, ((Part)rval).dd);
 }
}

public class ComposedEquality extends SuccinctEquality {
 Part part;
 public ComposedEquality(int i, String s, double d) {
 super(i, s, d);
 part = new Part(s, d);
 System.out.println("made 'ComposedEquality'");
 }
 @Override
 public boolean equals(Object rval) {
 return rval instanceof ComposedEquality &&
 super.equals(rval) &&
 Objects.equals(part,
 ((ComposedEquality)rval).part);
 }
 public static void main(String[] args) {
 Equality.testAll( (i, s, d) ->
 new ComposedEquality(i, s, d));
 }
}
/* Output:
made 'Equality'
made 'SuccinctEquality'
made 'ComposedEquality'
made 'Equality'
made 'SuccinctEquality'
made 'ComposedEquality'
made 'Equality'
made 'SuccinctEquality'
made 'ComposedEquality'
-- Testing null --
null instanceof Equality: false
Expected false, got false
-- Testing same object --
same object instanceof Equality: true
Expected true, got true
-- Testing different type --
different type instanceof Equality: false
Expected false, got false
-- Testing same values --
same values instanceof Equality: true
Expected true, got true
-- Testing different values --
different values instanceof Equality: true
Expected false, got false
*/