Examples of org.apache.commons.collections15.Bag

Package org.apache.commons.collections15

Examples of org.apache.commons.collections15.Bag

org.apache.commons.collections15.Bag
Defines a collection that counts the number of times an object appears in the collection.
Suppose you have a Bag that contains {a, a, b, c}. Calling {@link #getCount(Object)} on a would return 2, whilecalling {@link #uniqueSet()} would return {a, b, c}.
NOTE: This interface violates the {@link Collection} contract.The behavior specified in many of these methods is not the same as the behavior specified by Collection. The noncompliant methods are clearly marked with "(Violation)". Exercise caution when using a bag as a Collection.
This violation resulted from the original specification of this interface. In an ideal world, the interface would be changed to fix the problems, however it has been decided to maintain backwards compatibility instead. @author Chuck Burdick @author Matt Hall, John Watkinson, Stephen Colebourne @version $Revision: 1.1 $ $Date: 2005/10/11 17:05:19 $ @since Commons Collections 2.0

        buffer.addAll(Arrays.asList(getFullElements()));
        return UnmodifiableBuffer.decorate(buffer);
    }


    public Collection makeConfirmedCollection() {
        ArrayStack list = new ArrayStack();
        return list;
    }

View Full Code Here

        ArrayStack list = new ArrayStack();
        return list;
    }


    public Collection makeConfirmedFullCollection() {
        ArrayStack list = new ArrayStack();
        list.addAll(Arrays.asList(getFullElements()));
        return list;
    }

View Full Code Here

    }
    
    //--------------------------------------------------------------------------


    public void testlegalAddRemove() {
        Bag bag = makeTestBag();
        assertEquals(0, bag.size());
        Object[] els = new Object[]{"1", "3", "5", "7", "2", "4", "1"};
        for (int i = 0; i < els.length; i++) {
            bag.add(els[i]);
            assertEquals(i + 1, bag.size());
            assertEquals(true, bag.contains(els[i]));
        }
        Set set = ((PredicatedBag) bag).uniqueSet();
        assertTrue("Unique set contains the first element", set.contains(els[0]));
        assertEquals(true, bag.remove(els[0]));
        set = ((PredicatedBag) bag).uniqueSet();
        assertTrue("Unique set now does not contain the first element", !set.contains(els[0]));
    }

View Full Code Here

        set = ((PredicatedBag) bag).uniqueSet();
        assertTrue("Unique set now does not contain the first element", !set.contains(els[0]));
    }


    public void testIllegalAdd() {
        Bag bag = makeTestBag();
        Integer i = new Integer(3);
        try {
            bag.add(i);
            fail("Integer should fail type check.");
        } catch (IllegalArgumentException e) {
            // expected
        }
        assertTrue("Collection shouldn't contain illegal element", !bag.contains(i));
    }

View Full Code Here

        elements.add("one");
        elements.add("two");
        elements.add(new Integer(3));
        elements.add("four");
        try {
            Bag bag = decorateBag(elements, stringClass);
            fail("Bag contains an element that should fail the type test.");
        } catch (IllegalArgumentException e) {
            // expected
        }
        try {
            Bag bag = decorateBag(new HashBag(), null);
            fail("Expectiing IllegalArgumentException for null predicate.");
        } catch (IllegalArgumentException e) {
            // expected
        }
    }

View Full Code Here

        bag.retainAll(retains);
        assertEquals("Should have 2 total items", 2, bag.size());
    }


    public void testIterator() {
        Bag bag = makeBag();
        bag.add("A");
        bag.add("A");
        bag.add("B");
        assertEquals("Bag should have 3 items", 3, bag.size());
        Iterator i = bag.iterator();


        boolean foundA = false;
        while (i.hasNext()) {
            String element = (String) i.next();
            // ignore the first A, remove the second via Iterator.remove()
            if (element.equals("A")) {
                if (foundA == false) {
                    foundA = true;
                } else {
                    i.remove();
                }
            }
        }


        assertTrue("Bag should still contain 'A'", bag.contains("A"));
        assertEquals("Bag should have 2 items", 2, bag.size());
        assertEquals("Bag should have 1 'A'", 1, bag.getCount("A"));
    }

View Full Code Here

        assertEquals("Bag should have 2 items", 2, bag.size());
        assertEquals("Bag should have 1 'A'", 1, bag.getCount("A"));
    }


    public void testIteratorFail() {
        Bag bag = makeBag();
        bag.add("A");
        bag.add("A");
        bag.add("B");
        Iterator it = bag.iterator();
        it.next();
        bag.remove("A");
        try {
            it.next();
            fail("Should throw ConcurrentModificationException");
        } catch (ConcurrentModificationException e) {
            // expected

View Full Code Here

            // expected
        }
    }


    public void testIteratorFailNoMore() {
        Bag bag = makeBag();
        bag.add("A");
        bag.add("A");
        bag.add("B");
        Iterator it = bag.iterator();
        it.next();
        it.next();
        it.next();
        try {
            it.next();

View Full Code Here

            // expected
        }
    }


    public void testIteratorFailDoubleRemove() {
        Bag bag = makeBag();
        bag.add("A");
        bag.add("A");
        bag.add("B");
        Iterator it = bag.iterator();
        it.next();
        it.next();
        assertEquals(3, bag.size());
        it.remove();
        assertEquals(2, bag.size());
        try {
            it.remove();
            fail("Should throw IllegalStateException");
        } catch (IllegalStateException ex) {
            // expected
        }
        assertEquals(2, bag.size());
        it.next();
        it.remove();
        assertEquals(1, bag.size());
    }

View Full Code Here

        it.remove();
        assertEquals(1, bag.size());
    }


    public void testIteratorRemoveProtectsInvariants() {
        Bag bag = makeBag();
        bag.add("A");
        bag.add("A");
        assertEquals(2, bag.size());
        Iterator it = bag.iterator();
        assertEquals("A", it.next());
        assertEquals(true, it.hasNext());
        it.remove();
        assertEquals(1, bag.size());
        assertEquals(true, it.hasNext());
        assertEquals("A", it.next());
        assertEquals(false, it.hasNext());
        it.remove();
        assertEquals(0, bag.size());
        assertEquals(false, it.hasNext());


        Iterator it2 = bag.iterator();
        assertEquals(false, it2.hasNext());
    }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of org.apache.commons.collections15.Bag

edu.uci.ics.jung.algorithms.shortestpath.DijkstraDistance

edu.uci.ics.jung.samples.PluggableRendererDemo

junit.framework.TestSuite

org.apache.commons.collections15.ArrayStack

org.apache.commons.collections15.Bag

org.apache.commons.collections15.bag.AbstractMapBag

org.apache.commons.collections15.bag.AbstractTestBag

org.apache.commons.collections15.bag.HashBag

org.apache.commons.collections15.bag.TestPredicatedBag

org.apache.commons.collections15.bag.TestPredicatedSortedBag

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.