cern.gp.nodes.children

Class BeanComparatorAdapter

java.lang.Object

cern.gp.nodes.children.BeanComparatorAdapter

All Implemented Interfaces:

java.util.Comparator

public class BeanComparatorAdapter
extends java.lang.Object
implements java.util.Comparator

This class adapts a Comparator able to compare bean objects, to a Comparator able to compare nodes based on those bean objects.

The nodes will be sorted as the underlying bean objects are sorted by the bean comparator passed in the constructor of this object.

A typical use of the BeanComparatorAdapter will be inside a ChildrenManager. The method getComparator() must return a Comparator that compares nodes. But as a user you may prefer to compare at the bean level as each node represents a given bean. You can therefore write a Comparator that compares your beans and use the BeanComparatorAdapter to return a node Comparator based on your bean Comparator :

 public Comparator getComparator() {
   return new BeanComparatorAdapter(new MyBeanComparator());
 }
 

In this example, MyBeanComparator is a class that you write to compare the beans that are used to create the node. MyBeanComparator only knows how to compare two bean objects, instead of comparing two nodes based on those bean objects.

Author:

Lionel Mestre

Constructor Summary

Constructors

Constructor and Description
BeanComparatorAdapter(java.util.Comparator beanComparator) Creates a new GPBeanNode based on the given bean with no children The new node is therefore a leaf.

Method Summary

Modifier and Type	Method and Description
int	compare(java.lang.Object o1, java.lang.Object o2)
boolean	equals(java.lang.Object obj)

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

BeanComparatorAdapter

public BeanComparatorAdapter(java.util.Comparator beanComparator)

Creates a new GPBeanNode based on the given bean with no children The new node is therefore a leaf.

Method Detail

compare

public final int compare(java.lang.Object o1,
                         java.lang.Object o2)

Specified by:

compare in interface java.util.Comparator

equals

public final boolean equals(java.lang.Object obj)

Specified by:

equals in interface java.util.Comparator

Overrides:

equals in class java.lang.Object