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
IStatus validationStatus = doValidate(e.originalValue);
		if (!validationStatus.isOK()) {
			return;
		}
		e.pipelinePosition = BindingEvent.PIPELINE_AFTER_VALIDATE;
		if (failure(errMsg(fireBindingEvent(e)))) {
			return;
		}
		try {
			updatingModel = true;
			e.convertedValue = targetToModelConverter.convert(e.originalValue);
			e.pipelinePosition = BindingEvent.PIPELINE_AFTER_CONVERT;
			if (failure(errMsg(fireBindingEvent(e)))) {
				return;
			}
			validationStatus = doDomainValidation(e.convertedValue);
			if (!validationStatus.isOK()) {
				return;
			}
			e.pipelinePosition = BindingEvent.PIPELINE_AFTER_BUSINESS_VALIDATE;
			if (failure(errMsg(fireBindingEvent(e)))) {
				return;
			}
			model.setValue(e.convertedValue);
			e.pipelinePosition = BindingEvent.PIPELINE_AFTER_CHANGE;
			fireBindingEvent(e);
		} catch (Exception ex) {
			IStatus error = ValidationStatus.error(BindingMessages
					.getString("ValueBinding_ErrorWhileSettingValue"), 
					ex);