Examples of org.apache.commons.collections4.comparators.ComparatorChain

Package org.apache.commons.collections4.comparators

Examples of org.apache.commons.collections4.comparators.ComparatorChain

org.apache.commons.collections4.SetValuedMap
A ComparatorChain is a Comparator that wraps one or more Comparators in sequence. The ComparatorChain calls each Comparator in sequence until either 1) any single Comparator returns a non-zero result (and that result is then returned), or 2) the ComparatorChain is exhausted (and zero is returned). This type of sorting is very similar to multi-column sorting in SQL, and this class allows Java classes to emulate that kind of behaviour when sorting a List.
To further facilitate SQL-like sorting, the order of any single Comparator in the list can be reversed.
Calling a method that adds new Comparators or changes the ascend/descend sort after compare(Object, Object) has been called will result in an UnsupportedOperationException. However, take care to not alter the underlying List of Comparators or the BitSet that defines the sort order.
Instances of ComparatorChain are not synchronized. The class is not thread-safe at construction time, but it is thread-safe to perform multiple comparisons after all the setup operations are complete. @since 2.0 @version $Id: ComparatorChain.java 1477747 2013-04-30 18:16:48Z tn $

        try {
            executeAndThrow(input);
        } catch (final RuntimeException ex) {
            throw ex;
        } catch (final Throwable t) {
            throw new FunctorException(t);
        }
    }

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            }


            try {
                return (T) iCloneMethod.invoke(iPrototype, (Object[]) null);
            } catch (final IllegalAccessException ex) {
                throw new FunctorException("PrototypeCloneFactory: Clone method must be public", ex);
            } catch (final InvocationTargetException ex) {
                throw new FunctorException("PrototypeCloneFactory: Clone method threw an exception", ex);
            }
        }

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        }


        try {
            return iConstructor.newInstance(iArgs);
        } catch (final InstantiationException ex) {
            throw new FunctorException("InstantiateFactory: InstantiationException", ex);
        } catch (final IllegalAccessException ex) {
            throw new FunctorException("InstantiateFactory: Constructor must be public", ex);
        } catch (final InvocationTargetException ex) {
            throw new FunctorException("InstantiateFactory: Constructor threw an exception", ex);
        }
    }

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     * @return true if decorated predicate returns true
     * @throws FunctorException if input is null
     */
    public boolean evaluate(final T object) {
        if (object == null) {
            throw new FunctorException("Input Object must not be null");
        }
        return iPredicate.evaluate(object);
    }

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     * @return the transformed result
     */
    public T transform(final Class<? extends T> input) {
        try {
            if (input == null) {
                throw new FunctorException(
                    "InstantiateTransformer: Input object was not an instanceof Class, it was a null object");
            }
            final Constructor<? extends T> con = input.getConstructor(iParamTypes);
            return con.newInstance(iArgs);
        } catch (final NoSuchMethodException ex) {
            throw new FunctorException("InstantiateTransformer: The constructor must exist and be public ");
        } catch (final InstantiationException ex) {
            throw new FunctorException("InstantiateTransformer: InstantiationException", ex);
        } catch (final IllegalAccessException ex) {
            throw new FunctorException("InstantiateTransformer: Constructor must be public", ex);
        } catch (final InvocationTargetException ex) {
            throw new FunctorException("InstantiateTransformer: Constructor threw an exception", ex);
        }
    }

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        assertNotSame(map1.hashCode(), map2.hashCode());
    }


    @SuppressWarnings({ "unchecked", "rawtypes" })
    public void testListValuedMapEqualsHashCodeContract() {
        ListValuedMap map1 = MultiValuedLinkedHashMap.listValuedLinkedHashMap();
        ListValuedMap map2 = MultiValuedLinkedHashMap.listValuedLinkedHashMap();


        map1.put("a", "a1");
        map1.put("a", "a2");
        map2.put("a", "a1");
        map2.put("a", "a2");
        assertEquals(map1, map2);
        assertEquals(map1.hashCode(), map2.hashCode());


        map1.put("b", "b1");
        map1.put("b", "b2");
        map2.put("b", "b2");
        map2.put("b", "b1");
        assertNotSame(map1, map2);
        assertNotSame(map1.hashCode(), map2.hashCode());
    }

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        assertNotSame(map1.hashCode(), map2.hashCode());
    }


    @SuppressWarnings({ "unchecked", "rawtypes" })
    public void testListValuedMapEqualsHashCodeContract() {
        ListValuedMap map1 = MultiValuedHashMap.listValuedHashMap();
        ListValuedMap map2 = MultiValuedHashMap.listValuedHashMap();


        map1.put("a", "a1");
        map1.put("a", "a2");
        map2.put("a", "a1");
        map2.put("a", "a2");
        assertEquals(map1, map2);
        assertEquals(map1.hashCode(), map2.hashCode());


        map1.put("b", "b1");
        map1.put("b", "b2");
        map2.put("b", "b2");
        map2.put("b", "b1");
        assertNotSame(map1, map2);
        assertNotSame(map1.hashCode(), map2.hashCode());
    }

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        }
    }


    @SuppressWarnings({ "unchecked", "rawtypes" })
    public void testEqualsHashCodeContract() {
        MultiValuedMap map1 = new MultiValuedLinkedHashMap();
        MultiValuedMap map2 = new MultiValuedLinkedHashMap();


        map1.put("a", "a1");
        map1.put("a", "a2");
        map2.put("a", "a2");
        map2.put("a", "a1");
        assertEquals(map1, map2);
        assertEquals(map1.hashCode(), map2.hashCode());


        map2.put("a", "a2");
        assertNotSame(map1, map2);
        assertNotSame(map1.hashCode(), map2.hashCode());
    }

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        assertEquals(2, listMap.get("B").size());
    }


    @SuppressWarnings({ "unchecked", "rawtypes" })
    public void testEqualsHashCodeContract() {
        MultiValuedMap map1 = new MultiValuedHashMap();
        MultiValuedMap map2 = new MultiValuedHashMap();


        map1.put("a", "a1");
        map1.put("a", "a2");
        map2.put("a", "a2");
        map2.put("a", "a1");
        assertEquals(map1, map2);
        assertEquals(map1.hashCode(), map2.hashCode());


        map2.put("a", "a2");
        assertNotSame(map1, map2);
        assertNotSame(map1.hashCode(), map2.hashCode());
    }

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        assertNotSame(map1.hashCode(), map2.hashCode());
    }


    @SuppressWarnings({ "unchecked", "rawtypes" })
    public void testSetValuedMapEqualsHashCodeContract() {
        SetValuedMap map1 = MultiValuedLinkedHashMap.setValuedLinkedHashMap();
        SetValuedMap map2 = MultiValuedLinkedHashMap.setValuedLinkedHashMap();


        map1.put("a", "a1");
        map1.put("a", "a2");
        map2.put("a", "a2");
        map2.put("a", "a1");
        assertEquals(map1, map2);
        assertEquals(map1.hashCode(), map2.hashCode());


        map2.put("a", "a2");
        assertEquals(map1, map2);
        assertEquals(map1.hashCode(), map2.hashCode());


        map2.put("a", "a3");
        assertNotSame(map1, map2);
        assertNotSame(map1.hashCode(), map2.hashCode());
    }

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