Examples of org.springframework.binding.value.CommitTrigger

Package org.springframework.binding.value

Examples of org.springframework.binding.value.CommitTrigger

org.springframework.binding.value.CommitTrigger
A class that can be used to trigger an event on a group of objects. Mainly intended to be used to trigger flush/revert in BufferedValueModel but is useful in general. @author Keith Donald @author Oliver Hutchison

            }
        }


        private CommitTrigger getResetTrigger() {
            if (resetTrigger == null) {
                resetTrigger = new CommitTrigger();
                registerListeners();
            }
            return resetTrigger;
        }

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    private ValueModel wrapped;
    private CommitTrigger commitTrigger;
        
    protected void doSetUp() throws Exception {
        wrapped = new ValueHolder(INITIAL_VALUE);
        commitTrigger = new CommitTrigger();
    }

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    /**
     * Checks that #setCommitTrigger changes the commit trigger.
     */
    public void testCommitTriggerChange() {
        CommitTrigger trigger1 = new CommitTrigger();
        CommitTrigger trigger2 = new CommitTrigger();
        
        BufferedValueModel buffer = new BufferedValueModel(wrapped, trigger1);
        assertSame(
            "Commit trigger has been changed.",
            buffer.getCommitTrigger(),

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    /**
     * Checks and verifies that commit and flush events are driven
     * by the current commit trigger.
     */
    public void testListensToCurrentCommitTrigger() {
        CommitTrigger trigger1 = new CommitTrigger();
        CommitTrigger trigger2 = new CommitTrigger();
        
        BufferedValueModel buffer = new BufferedValueModel(wrapped, trigger1);
        buffer.setValue("change1");
        Object wrappedValue = wrapped.getValue();
        Object bufferedValue = buffer.getValue();
        trigger2.commit();
        assertEquals(
            "Changing the unrelated trigger2 to commit has no effect on the wrapped.", 
            wrapped.getValue(),
            wrappedValue);
        assertSame(
            "Changing the unrelated trigger2 to commit has no effect on the buffer.", 
            buffer.getValue(),
            bufferedValue);
        
        trigger2.revert();
        assertEquals(
            "Changing the unrelated trigger2 to revert has no effect on the wrapped.", 
            wrapped.getValue(),
            wrappedValue);
        assertSame(
            "Changing the unrelated trigger2 to revert has no effect on the buffer.", 
            buffer.getValue(),
            bufferedValue);
        
        // Change the commit trigger to trigger2.
        buffer.setCommitTrigger(trigger2);
        assertSame(
            "Commit trigger has been changed.",
            buffer.getCommitTrigger(),
            trigger2);


        trigger1.commit();
        assertEquals(
            "Changing the unrelated trigger1 to commit has no effect on the wrapped.", 
            wrapped.getValue(),
            wrappedValue);
        assertSame(
            "Changing the unrelated trigger1 to commit has no effect on the buffer.", 
            buffer.getValue(),
            bufferedValue);
        
        trigger1.revert();
        assertEquals(
            "Changing the unrelated trigger1 to revert has no effect on the wrapped.", 
            wrapped.getValue(),
            wrappedValue);
        assertSame(
            "Changing the unrelated trigger1 to revert has no effect on the buffer.", 
            buffer.getValue(),
            bufferedValue);
        
        // Commit using trigger2.
        trigger2.commit();
        assertEquals(
            "Changing the current trigger2 to commit commits the buffered value.", 
            buffer.getValue(),
            wrapped.getValue());
        
        buffer.setValue("change2");
        wrappedValue = wrapped.getValue();
        trigger2.revert();
        assertEquals(
            "Changing the current trigger2 to revert flushes the buffered value.", 
            buffer.getValue(),
            wrapped.getValue());
        assertEquals(

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    // Test Implementations ***************************************************
    
    private void testSetValueSendsProperEvents(Object oldValue, Object newValue, boolean eventExpected) {
        BufferedValueModel valueModel = 
            new BufferedValueModel(new ValueHolder(oldValue), new CommitTrigger());
        testSendsProperEvents(valueModel, oldValue, newValue, eventExpected);
    }

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        llm.clear();
        assertEquals(1, vl.eventCount());
    }


    public void testRevert() {
        CommitTrigger commitTriger = new CommitTrigger();


        Collection backingCollection = getCollection(HashSet.class, 700);
        BufferedCollectionValueModel vm = getBufferedCollectionValueModel(backingCollection);
        vm.setCommitTrigger(commitTriger);
        ListListModel llm = (ListListModel)vm.getValue();
        llm.clear();
        commitTriger.revert();
        assertHasSameStructure(llm, backingCollection);
    }

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 * @author Oliver Hutchison
 */
public class CommitTriggerTests extends TestCase {


    public void testCommitTrigger() {
        CommitTrigger ct = new CommitTrigger();
        ct.commit();
        ct.revert();


        TestCommitTriggerListener l = new TestCommitTriggerListener();
        ct.addCommitTriggerListener(l);
        assertEquals(0, l.commits);
        assertEquals(0, l.reverts);


        ct.commit();
        assertEquals(1, l.commits);
        ct.commit();
        assertEquals(2, l.commits);
        assertEquals(0, l.reverts);
        ct.revert();
        assertEquals(2, l.commits);
        assertEquals(1, l.reverts);
        
        ct.removeCommitTriggerListener(l);
        
        ct.commit();
        assertEquals(2, l.commits);
        ct.revert();
        assertEquals(1, l.reverts);        
    }

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