Examples of org.apache.commons.collections.Buffer

org.apache.commons.collections.Buffer
Defines a collection that allows objects to be removed in some well-defined order.
The removal order can be based on insertion order (eg, a FIFO queue or a LIFO stack), on access order (eg, an LRU cache), on some arbitrary comparator (eg, a priority queue) or on any other well-defined ordering.
Note that the removal order is not necessarily the same as the iteration order. A Buffer implementation may have equivalent removal and iteration orders, but this is not required.
This interface does not specify any behavior for {@link Object#equals(Object)} and {@link Object#hashCode} methods. Itis therefore possible for a Buffer implementation to also also implement {@link java.util.List}, {@link java.util.Set} or {@link Bag}. @since Commons Collections 2.1 @version $Revision: 1.10 $ $Date: 2004/02/18 01:15:42 $ @author Avalon @author Berin Loritsch @author Paul Jack @author Stephen Colebourne

     *  threads should complete. Each thread should have read a
     *  different object.
     */
    public void testBlockedRemoveWithAddAll2() {
        
        Buffer blockingBuffer = BlockingBuffer.decorate(new MyBuffer());
        Object obj1 = new Object();
        Object obj2 = new Object();
        
        Set objs = Collections.synchronizedSet(new HashSet());
        objs.add(obj1);
        objs.add(obj2);


        // run methods will remove and compare -- must wait for addAll
        Thread thread1 = new ReadThread(blockingBuffer, objs, "remove");
        Thread thread2 = new ReadThread(blockingBuffer, objs, "remove");
        thread1.start();
        thread2.start();
        
        // give hungry read threads ample time to hang
        delay();
           
        blockingBuffer.addAll(objs);
        
        // allow notified threads to complete 
        delay();
        
        assertEquals("Both objects were removed", 0, objs.size());

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    /**
     *  Tests interrupted remove.
     */
    public void testInterruptedRemove() {
        
        Buffer blockingBuffer = BlockingBuffer.decorate(new MyBuffer());
        Object obj = new Object();
        
        // spawn a read thread to wait on the empty buffer
        ArrayList exceptionList = new ArrayList();
        Thread thread = new ReadThread(blockingBuffer, obj, exceptionList, "remove");

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    public void testCircularFifoBufferCircular() {
        List list = new ArrayList();
        list.add("A");
        list.add("B");
        list.add("C");
        Buffer buf = new CircularFifoBuffer(list);
        
        assertEquals(true, buf.contains("A"));
        assertEquals(true, buf.contains("B"));
        assertEquals(true, buf.contains("C"));
        
        buf.add("D");
        
        assertEquals(false, buf.contains("A"));
        assertEquals(true, buf.contains("B"));
        assertEquals(true, buf.contains("C"));
        assertEquals(true, buf.contains("D"));
        
        assertEquals("B", buf.get());
        assertEquals("B", buf.remove());
        assertEquals("C", buf.remove());
        assertEquals("D", buf.remove());
    }

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    }


    //-----------------------------------------------------------------------  
    public void testBufferEmpty() {
        resetEmpty();
        Buffer buffer = (Buffer) collection;


        assertEquals(0, buffer.size());
        assertEquals(true, buffer.isEmpty());
        try {
            buffer.get();
            fail();
        } catch (BufferUnderflowException ex) {}


        try {
            buffer.remove();
            fail();
        } catch (BufferUnderflowException ex) {}
    }

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    public Buffer makeTestBuffer() {
        return decorateBuffer(new ArrayStack(), testPredicate);
    }
    
    public void testGet() {
        Buffer buffer = makeTestBuffer();
        try {
            Object o = buffer.get();
            fail("Expecting BufferUnderflowException");
        } catch (BufferUnderflowException ex) {
            // expected
        }
        buffer.add("one");
        buffer.add("two");
        buffer.add("three");
        assertEquals("Buffer get", buffer.get(), "three");
    }

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        buffer.add("three");
        assertEquals("Buffer get", buffer.get(), "three");
    }
    
    public void testRemove() {
        Buffer buffer = makeTestBuffer();
        buffer.add("one");
        assertEquals("Buffer get", buffer.remove(), "one");
        try {
            buffer.remove();
            fail("Expecting BufferUnderflowException");
        } catch (BufferUnderflowException ex) {
            // expected
        }      
    }

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        String[] testCaseName = { TestTransformedBuffer.class.getName()};
        junit.textui.TestRunner.main(testCaseName);
    }


    public void testTransformedBuffer() {
        Buffer buffer = TransformedBuffer.decorate(new ArrayStack(), TestTransformedCollection.STRING_TO_INTEGER_TRANSFORMER);
        assertEquals(0, buffer.size());
        Object[] els = new Object[] {"1", "3", "5", "7", "2", "4", "6"};
        for (int i = 0; i < els.length; i++) {
            buffer.add(els[i]);
            assertEquals(i + 1, buffer.size());
            assertEquals(true, buffer.contains(new Integer((String) els[i])));
            assertEquals(false, buffer.contains(els[i]));
        }
        
        assertEquals(false, buffer.remove(els[0]));
        assertEquals(true, buffer.remove(new Integer((String) els[0])));
        
    }

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    }


    public synchronized List refresh() throws IOException {
        
        List lines = new ArrayList();
        Buffer buffer = _listWriter.getBuffer();
        while (buffer.size() > 0) {
            lines.add(buffer.remove());
        }
        return lines;
        
    }

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         * @param phaseId -
         *                phase, for wich events must be processed.
         */
    void broadcastEvents(FacesContext context, PhaseId phaseId) {
  Buffer[] events = getEvents(context);
  Buffer anyPhaseEvents = events[PhaseId.ANY_PHASE.getOrdinal()];
  Buffer phaseEvents = events[phaseId.getOrdinal()];
  if (phaseEvents.isEmpty() && anyPhaseEvents.isEmpty())
      return;
  // FacesEvent event = null;
  boolean haveAnyPhaseEvents = !anyPhaseEvents.isEmpty();
  boolean havePhaseEvents = !phaseEvents.isEmpty();
  do {
      // ANY_PHASE first
      processEvents(anyPhaseEvents, haveAnyPhaseEvents);


      processEvents(phaseEvents, havePhaseEvents);
      // Events can queued in other events processing
      haveAnyPhaseEvents = !anyPhaseEvents.isEmpty();
      havePhaseEvents = !phaseEvents.isEmpty();
  } while (haveAnyPhaseEvents || havePhaseEvents);
  if (context.getRenderResponse() || context.getResponseComplete()) {
      clearEvents(context);
  }

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      }
  }
    }


    public void broadcastAjaxEvents(FacesContext context) {
  Buffer queue = getAjaxEventsQueue(context);
  processEvents(queue, !queue.isEmpty());
    }

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