Bug 167450 [DataBinding] Get rid of bind support factory magic
I finally realized that we don't need that other magic factory. I'll move fillBindSpecDefaults() and the methods it calls (createConverter, createValidator etc) to a new class DefaultBindSpec. Clients who want default validators and converters created for them just create a DefaultBindSpec as opposed to a (rather empty) BindSpec. I will also move the early type checking into DefaultBindSpec to make it optional as well.
bundles/org.eclipse.core.databinding/src/org/eclipse/core/internal/databinding/ValueBinding.java
super.dispose();
	}
	private final IValueChangingListener targetChangingListener = new IValueChangingListener() {
		public boolean handleValueChanging(IVetoableValue source, ValueDiff diff) {
			if (updatingTarget)
				return true;
			
			
			Object value = diff.getNewValue();
			IStatus partialValidationError = targetPartialValidator
					.validate(value);
			partialValidationErrorObservable.setValue(partialValidationError);
			return partialValidationError.isOK();
		}
	};
	private final IValueChangeListener targetChangeListener = new IValueChangeListener() {
		public void handleValueChange(IObservableValue source,
				final ValueDiff diff) {
			if (updatingTarget)
				return;
			
			
			model.getRealm().exec(new Runnable() {
				public void run() {
					doUpdateModelFromTarget(diff);
				}
			});
		}
	};
	private IValueChangeListener modelChangeListener = new IValueChangeListener() {