Examples of org.apache.commons.collections.comparators.ReverseComparator

Package org.apache.commons.collections.comparators

Examples of org.apache.commons.collections.comparators.ReverseComparator

org.apache.commons.collections.comparators.ReverseComparator
Reverses the order of another comparator by reversing the arguments to its {@link #compare(Object,Object) compare} method. @since Commons Collections 2.0 @version $Revision: 1.20 $ $Date: 2004/05/16 11:49:24 $ @author Henri Yandell @author Michael A. Smith @see java.util.Collections#reverseOrder()

    public TestDualTreeBidiMap2(String testName) {
        super(testName);
    }


    public BidiMap makeEmptyBidiMap() {
        return new DualTreeBidiMap(new ReverseComparator(ComparableComparator.getInstance()));
    }

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    public BidiMap makeEmptyBidiMap() {
        return new DualTreeBidiMap(new ReverseComparator(ComparableComparator.getInstance()));
    }


    public Map makeConfirmedMap() {
        return new TreeMap(new ReverseComparator(ComparableComparator.getInstance()));
    }

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    public void testSortOrder() throws Exception {
        SortedBidiMap sm = (SortedBidiMap) makeFullMap();


        // Sort by the comparator used in the makeEmptyBidiMap() method
        List newSortedKeys = Arrays.asList(getSampleKeys());
        Collections.sort(newSortedKeys, new ReverseComparator(ComparableComparator.getInstance()));
        newSortedKeys = Collections.unmodifiableList(newSortedKeys);


        Iterator mapIter = sm.keySet().iterator();
        Iterator expectedIter = newSortedKeys.iterator();
        while (expectedIter.hasNext()) {

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     */
    public static Comparator reversedComparator(Comparator comparator) {
        if (comparator == null) {
            comparator = NATURAL_COMPARATOR;
        }
        return new ReverseComparator(comparator);
    }

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            // expected
        }
    }


    public void testBasicComparatorOps() {
        BinaryHeap heap = new BinaryHeap(new ReverseComparator(new ComparableComparator()));


        assertTrue("heap should be empty after create", heap.isEmpty());


        try {
            heap.peek();

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     */
    @SuppressWarnings("unchecked")
    protected List sort(List list) {
        Comparator comparator = new BeanComparator(sortColumn, new NullComparator(nullsAreHigh));
        if (!ascending) {
            comparator = new ReverseComparator(comparator);
        }
        Collections.sort(list, comparator);
        return list;
    }

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    }


    protected Comparator getDbEntityComparator(boolean dependantFirst) {
        Comparator c = dbEntityComparator;
        if (dependantFirst) {
            c = new ReverseComparator(c);
        }
        return c;
    }

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    }


    protected Comparator<ObjEntity> getObjEntityComparator(boolean dependantFirst) {
        Comparator<ObjEntity> c = objEntityComparator;
        if (dependantFirst) {
            c = new ReverseComparator(c);
        }
        return c;
    }

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     */
    @SuppressWarnings("unchecked")
    protected List sort(List list) {
        Comparator comparator = new BeanComparator(sortColumn, new NullComparator(nullsAreHigh));
        if (!ascending) {
            comparator = new ReverseComparator(comparator);
        }
        Collections.sort(list, comparator);
        return list;
    }

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    }


    @Override
    public Comparator<IColumn> getColumnComparator(AbstractType comparator)
    {
        return reversed ? new ReverseComparator(super.getColumnComparator(comparator)) : super.getColumnComparator(comparator);
    }

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