Bug 172193 [DataBinding] Binding customization story
From IM... 10:12:10 PM brad: this is sort of a short in the dark but do you get confused by the method names in BindSpec? when i look at BindSpec i always think of either target -> model or model -> target. i'm not sure if i could come up with a way that wouldn't be as confusing to me but was curious if it confuses you at all. 10:13:04 PM boris: Two BindSpec, one for each direction? 10:15:21 PM brad: not exactly. what i get confused about are methods like setTargetToModelConverter and setTargetUpdatePolicy. (this is probably silly) but when i think of any set for target i always think of going from target to model. but instead setTargetToModel goes from target to model but setTargetUpdatePolicy is for model to target. 10:15:46 PM brad: i normally think of the pipeline when setting these values, for some reason it's easier for me. 10:16:01 PM brad: if it doesn't confuse you don't worry about it, i'm not always typical 10:16:24 PM boris: Would it be easier with two constants, TARGET_TO_MODEL and MODEL_TO_TARGET, and each method taking an int? 10:16:39 PM boris: It would cut down on the number of methods... brad10:17:03 PM brad: either that or having a naming convention that's a little more consistent (setTargetToModelUpdatePolicy(...), etc.) 10:17:31 PM brad: it might get a little verbose having to specify the direction for each method... 10:17:36 PM boris: T2M and M2T? 10:17:46 PM brad: yeah
tests/org.eclipse.jface.tests.databinding/src/org/eclipse/jface/tests/databinding/scenarios/CustomBeanBindSpec.java
* easy to associate validators with the properties that they are responsible
 * for validating.
 * 
 * <strong>EXPERIMENTAL</strong>. This class or interface has been added as
 * part of a work in progress. There is no guarantee that this API will remain
 * unchanged during the 3.2 release cycle. Please do not use this API without
 * consulting with the Platform/UI team.
 * 
 * @since 3.2
 */
public class CustomBeanBindSpec extends DefaultBindSpec {
	public IConverter createConverter(Object fromType, Object toType) {
		if (fromType instanceof CustomBeanModelType) {
			CustomBeanModelType customBeanModelType = (CustomBeanModelType) fromType;
			fromType = customBeanModelType.getType();
		}
		if (toType instanceof CustomBeanModelType) {
			CustomBeanModelType customBeanModelType = (CustomBeanModelType) toType;
			toType = customBeanModelType.getType();
		}
		return super.createConverter(fromType, toType);
	}
	protected IValidator createValidator(int pipelinePosition, Object modelType) {
		if (modelType instanceof CustomBeanModelType && pipelinePosition == BindingEvent.PIPELINE_BEFORE_CHANGE) {
			CustomBeanModelType property = (CustomBeanModelType) modelType;
			String propertyName = property.getPropertyName();
			String getValidatorMethodName = "get" + upperCaseFirstLetter(propertyName) + "Validator"; 
			Class objectClass = property.getObject().getClass();
			Method getValidator;
			try {