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/DataBindingContext.java
.get(i);
			IConverter converter = bindSupportFactory.createConverter(fromType,
					toType);
			if (converter != null) {
				return converter;
			}
		}
		if (parent != null) {
			return parent.createConverter(fromType, toType);
		}
		return null;
	}
	/**
	 * @param modelType
	 * @return an IValidator, or null if unsuccessful
	 */
	public IValidator createDomainValidator(Object modelType) {
		for (int i = bindSupportFactories.size() - 1; i >= 0; i--) {
			BindSupportFactory bindSupportFactory = (BindSupportFactory) bindSupportFactories
					.get(i);
			IValidator validator = bindSupportFactory
					.createDomainValidator(modelType);
			if (validator != null) {
				return validator;
			}
		}
		if (parent != null) {
			return parent.createDomainValidator(modelType);
		}
		return null;