IdentityComparator (zk 10.0.0 API)

java.lang.Object
- org.zkoss.util.IdentityComparator<T>

All Implemented Interfaces:

java.util.Comparator<T>
```
public class IdentityComparator<T>
extends java.lang.Object
implements java.util.Comparator<T>
```
The comparator uses == and System.identifyHashCode to compare two objects. It assumes if o1 != o2, then c1 != c2 where c1 = System.identityHashCode(o1).
This is useful if dynamic proxy is used with TreeSet or TreeMap (so equals is expensive). Reason: the speed of identifyHashCode is much faster than dynamic proxy (150:1).
However, if possible, java.util.IdentityHashMap and IdentityHashSet are preferred.

Author:

tomyeh

See Also:

IdentityHashSet

- Constructor Summary
  
  Constructors
  Constructor Description
  
  IdentityComparator()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  int compare(T o1, T o2)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  - Methods inherited from interface java.util.Comparator
    equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

- Constructor Detail
  - IdentityComparator
```
public IdentityComparator()
```
- Method Detail
  - compare
```
public int compare(T o1,
                   T o2)
```
    Specified by:
    
    compare in interface java.util.Comparator<T>