Example usage for org.apache.commons.collections4.comparators ReverseComparator ReverseComparator

Introduction

In this page you can find the example usage for org.apache.commons.collections4.comparators ReverseComparator ReverseComparator.

Prototype

public ReverseComparator() 

Source Link

Document

Creates a comparator that compares objects based on the inverse of their natural ordering.

Usage

From source file:net.sf.jasperreports.crosstabs.fill.calculation.BucketDefinition.java

public static Comparator<Object> createOrderComparator(Comparator<Object> comparator, BucketOrder order) {
    Comparator<Object> orderComparator;
    switch (order) {
    case DESCENDING: {
        if (comparator == null) {
            orderComparator = new ReverseComparator<Object>();
        } else {/*from  ww  w . j ava 2  s . c  o m*/
            orderComparator = new ReverseComparator<Object>(comparator);
        }
        break;
    }
    case ASCENDING: {
        if (comparator == null) {
            orderComparator = ComparableComparator.INSTANCE;
        } else {
            orderComparator = comparator;
        }
        break;
    }
    case NONE:
    default:
        throw new JRRuntimeException(EXCEPTION_MESSAGE_KEY_UNSUPPORTED_ORDER_TYPE, new Object[] { order });
    }
    return orderComparator;
}

---