Zobrazování chyb validace ZK frameworkem

src/main/java/info/bukova/isspst/ui/FormViewModel.java

@@ -21,11 +21,15 @@ public class FormViewModel<T extends DataModel> {
 	private Map<String, String> errMessages;
 	private Service<T> service;
 	private boolean newRec;
+	private ServiceConstraint<T> constraint;
 	
 	@Init
 	public void init(@ExecutionArgParam("selected") T selected, @ExecutionArgParam("service") Service<T> service) {
 		this.dataBean = selected;
 		this.service = service;
+		constraint = new ServiceConstraint<T>();
+		constraint.setDataBean(selected);
+		constraint.setService(service);
 		if (selected.getId() == 0 && selected.getCreated() == null) {
 			newRec = true;
 		} else {
@@ -33,6 +37,10 @@ public class FormViewModel<T extends DataModel> {
 		}
 	}
 	
+	public ServiceConstraint<T> getConstriant() {
+		return constraint;
+	}
+	
 	public T getDataBean() {
 		return dataBean;
 	}

src/main/java/info/bukova/isspst/ui/ServiceConstraint.java

@@ -0,0 +1,54 @@
+package info.bukova.isspst.ui;
+
+import info.bukova.isspst.data.DataModel;
+import info.bukova.isspst.services.Service;
+import info.bukova.isspst.services.ValidationException;
+
+import java.lang.reflect.InvocationTargetException;
+import java.util.Map;
+
+import org.apache.commons.beanutils.BeanUtils;
+import org.zkoss.zk.ui.Component;
+import org.zkoss.zk.ui.WrongValueException;
+import org.zkoss.zul.Constraint;
+
+public class ServiceConstraint<T extends DataModel> implements Constraint {
+	
+	private Service<T> service;
+	private T dataBean;
+	
+	@Override
+	public void validate(Component component, Object value)
+			throws WrongValueException {
+
+		String id = component.getId();
+		if (id == null || id.isEmpty()) {
+			return;
+		}
+		
+		try {
+			BeanUtils.setProperty(dataBean, id, value);
+			service.validate(dataBean);
+		} catch (ValidationException e) {
+			Map<String, String> errMessages = e.getMessages();
+			
+			if (errMessages != null && errMessages.get(id) != null && !errMessages.get(id).isEmpty()) {
+				WrongValueException ex = new WrongValueException(component, errMessages.get(id)); 
+				throw ex;
+			}
+		} catch (IllegalAccessException e) {
+			
+		} catch (InvocationTargetException e) {
+			
+		}
+	}
+
+	public void setService(Service<T> service) {
+		this.service = service;
+	}
+
+	public void setDataBean(T dataBean) {
+		this.dataBean = dataBean;
+	}
+
+}