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/databinding/DefaultBindSupportFactory.java
}
		IValidator dataTypeValidator = findValidator(fromType, toType);
		if (dataTypeValidator == null) {
			throw new BindingException(
					"No IValidator is registered for conversions from " + fromType + " to " + toType); 
		}
		return dataTypeValidator;
	}
	private IValidator findValidator(Object fromType, Object toType) {
		
		return validatorRegistry.get(fromType, toType);
	}
	public IConverter createConverter(Object fromType, Object toType) {
		if (!(fromType instanceof Class) || !(toType instanceof Class)) {
			return null;
		}
		Class toClass = (Class) toType;
		if (toClass.isPrimitive()) {
			toClass = autoboxed(toClass);
		}
		Class fromClass = (Class) fromType;
		if (fromClass.isPrimitive()) {
			fromClass = autoboxed(fromClass);
		}
		if (!((Class) toType).isPrimitive()
				&& toClass.isAssignableFrom(fromClass)) {
			return new IdentityConverter(fromClass, toClass);
		}
		if (((Class) fromType).isPrimitive() && ((Class) toType).isPrimitive()
				&& fromType.equals(toType)) {