Package org.apache.commons.collections

Examples of org.apache.commons.collections.Bag

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            return true;
        }
        if (object instanceof Bag == false) {
            return false;
        }
        Bag other = (Bag) object;
        if (other.size() != size()) {
            return false;
        }
        for (Iterator it = map.keySet().iterator(); it.hasNext();) {
            Object element = (Object) it.next();
            if (other.getCount(element) != getCount(element)) {
                return false;
            }
        }
        return true;
    }
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     * Compare the current serialized form of the Bag
     * against the canonical version in CVS.
     */
    public void testEmptyBagCompatibility() throws IOException, ClassNotFoundException {
        // test to make sure the canonical form has been preserved
        Bag bag = makeBag();
        if(bag instanceof Serializable && !skipSerializedCanonicalTests()) {
            Bag bag2 = (Bag) readExternalFormFromDisk(getCanonicalEmptyCollectionName(bag));
            assertTrue("Bag is empty",bag2.size()  == 0);
            assertEquals(bag, bag2);
        }
    }
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     * Compare the current serialized form of the Bag
     * against the canonical version in CVS.
     */
    public void testFullBagCompatibility() throws IOException, ClassNotFoundException {
        // test to make sure the canonical form has been preserved
        Bag bag = makeBag();
        bag.add("A");
        bag.add("A");
        bag.add("B");
        bag.add("B");
        bag.add("C");
        if(bag instanceof Serializable && !skipSerializedCanonicalTests()) {
            Bag bag2 = (Bag) readExternalFormFromDisk(getCanonicalFullCollectionName(bag));
            assertEquals("Bag is the right size",bag.size(), bag2.size());
            assertEquals(bag, bag2);
        }
    }
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    public Bag makeBag() {
        return TransformedSortedBag.decorate(new TreeBag(), TestTransformedCollection.NOOP_TRANSFORMER);
    }

    public void testTransformedBag() {
        Bag bag = TransformedSortedBag.decorate(new TreeBag(), TestTransformedCollection.STRING_TO_INTEGER_TRANSFORMER);
        assertEquals(0, bag.size());
        Object[] els = new Object[] {"1", "3", "5", "7", "2", "4", "6"};
        for (int i = 0; i < els.length; i++) {
            bag.add(els[i]);
            assertEquals(i + 1, bag.size());
            assertEquals(true, bag.contains(new Integer((String) els[i])));
        }
       
        assertEquals(true, bag.remove(new Integer((String) els[0])));
       
    }
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      bag.add("D");
      return bag;
   }

   public void testOrdering() {
      Bag bag = setupBag();
      assertEquals("Should get elements in correct order",
                   "A", bag.toArray()[0]);
      assertEquals("Should get elements in correct order",
                   "B", bag.toArray()[1]);
      assertEquals("Should get elements in correct order",
                   "C", bag.toArray()[2]);
      assertEquals("Should get first key",
                   "A", ((SortedBag)bag).first());
      assertEquals("Should get last key",
                   "D", ((SortedBag)bag).last());
   }
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    public Bag makeBag() {
        return TransformedBag.decorate(new HashBag(), TestTransformedCollection.NOOP_TRANSFORMER);
    }

    public void testTransformedBag() {
        Bag bag = TransformedBag.decorate(new HashBag(), TestTransformedCollection.STRING_TO_INTEGER_TRANSFORMER);
        assertEquals(0, bag.size());
        Object[] els = new Object[] {"1", "3", "5", "7", "2", "4", "6"};
        for (int i = 0; i < els.length; i++) {
            bag.add(els[i]);
            assertEquals(i + 1, bag.size());
            assertEquals(true, bag.contains(new Integer((String) els[i])));
            assertEquals(false, bag.contains(els[i]));
        }
       
        assertEquals(false, bag.remove(els[0]));
        assertEquals(true, bag.remove(new Integer((String) els[0])));
       
    }
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    }
   
    //--------------------------------------------------------------------------

    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]));
    }
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        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));  
    }
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        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
        }             
    }
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            Set set = new HashSet();
            set.addAll((Set) col);
            return set;
        }
        else if (col instanceof Bag) {
            Bag bag = new HashBag();
            bag.addAll((Bag) col);
            return bag;
        }
        else {
            throw new IllegalArgumentException("Cannot clone collections of type: " + col.getClass().getName());
        }
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