new presentation model methods; ability to surpress commit of dirty value in PMB

org.springframework.context/src/main/java/org/springframework/model/ui/PresentationModel.java

@@ -15,7 +15,6 @@
  */
 package org.springframework.model.ui;
 
-
 /**
  * Represents the state and behavior of a presentation independently of the GUI controls used in the interface.
  * Pulls the state and behavior of a view out into a model class that is part of the presentation.
@@ -31,5 +30,23 @@ public interface PresentationModel {
 	 * @throws FieldNotFoundException if no such field exists
 	 */
 	FieldModel getFieldModel(String fieldName);
+
+	/**
+	 * If errors are present on this PresentationModel.
+	 * Returns true if at least one FieldModel has {@link BindingStatus#INVALID_SUBMITTED_VALUE invalid submitted values} or is {@link ValidationStatus#INVALID invalid}.
+	 */
+	boolean hasErrors();
 	
+	/**
+	 * Commit any {@link BindingStatus#DIRTY dirty} fields.
+	 * @throws IllegalStateException if there are field models that have {@link BindingStatus#INVALID_SUBMITTED_VALUE invalid submitted values} or are {@link ValidationStatus#INVALID invalid}.
+	 */
+	void commit();
+
+	/**
+	 * Validate all fields.
+	 * Skips any fields with {@link BindingStatus#INVALID_SUBMITTED_VALUE invalid submitted values}.
+	 */
+	void validate();
+
 }

org.springframework.context/src/main/java/org/springframework/model/ui/support/DefaultPresentationModel.java

@@ -143,6 +143,20 @@ public class DefaultPresentationModel implements PresentationModel {
 		return field;
 	}
 
+	public boolean hasErrors() {
+		return false;
+	}
+
+	public void commit() {
+		
+	}
+
+	public void validate() {
+		
+	}
+	
+	// internal helpers
+
 	private PropertyFieldModelRule getRule(String fieldName) {
 		PropertyFieldModelRule rule = fieldModelRules.get(fieldName);
 		if (rule == null) {

org.springframework.context/src/main/java/org/springframework/model/ui/support/PresentationModelBinder.java

@@ -35,28 +35,36 @@ import org.springframework.model.ui.PresentationModel;
  * @since 3.0
  * @see #setMessageSource(MessageSource)
  * @see #setRequiredFields(String[])
+ * @see #setCommitDirtyValue(boolean)
  * @see #bind(Map, PresentationModel)
  */
 public class PresentationModelBinder extends AbstractBinder<PresentationModel> {
 
-	// subclassing hooks
+	private boolean commitDirtyValue;
+	
+	/**
+	 * Configures if this PresentationModelBinder should eagerly commit the dirty value after a successful field binding.
+	 * Default is false.
+	 */
+	public void setCommitDirtyValue(boolean commitDirtyValue) {
+		this.commitDirtyValue = commitDirtyValue;
+	}
+
+	// subclass hooks
 
 	@Override
 	protected FieldBinder createFieldBinder(PresentationModel model) {
-		return new FieldModelBinder(model, getMessageSource());
+		return new FieldModelBinder(model);
 	}
 
 	// internal helpers
 	
-	private static class FieldModelBinder implements FieldBinder {
+	private class FieldModelBinder implements FieldBinder {
 		
 		private PresentationModel presentationModel;
 
-		private MessageSource messageSource;
-		
-		public FieldModelBinder(PresentationModel presentationModel, MessageSource messageSource) {
+		public FieldModelBinder(PresentationModel presentationModel) {
 			this.presentationModel = presentationModel;
-			this.messageSource = messageSource;
 		}
 
 		public BindingResult bind(String fieldName, Object value) {
@@ -64,13 +72,13 @@ public class PresentationModelBinder extends AbstractBinder<PresentationModel> {
 			try {
 				field = presentationModel.getFieldModel(fieldName);
 			} catch (FieldNotFoundException e) {
-				return new FieldNotFoundResult(fieldName, value,  messageSource);
+				return new FieldNotFoundResult(fieldName, value,  getMessageSource());
 			}
 			if (!field.isEditable()) {
-				return new FieldNotEditableResult(fieldName, value, messageSource);
+				return new FieldNotEditableResult(fieldName, value, getMessageSource());
 			} else {
 				field.applySubmittedValue(value);
-				if (field.getBindingStatus() == BindingStatus.DIRTY) {
+				if (field.getBindingStatus() == BindingStatus.DIRTY && commitDirtyValue) {
 					field.commit();
 				}
 				return new AlertBindingResult(fieldName, value, field.getStatusAlert());

org.springframework.context/src/test/java/org/springframework/model/ui/support/PresentationModelBinderTests.java

@@ -48,6 +48,7 @@ public class PresentationModelBinderTests {
 		bean = new TestBean();
 		presentationModel = new DefaultPresentationModel(bean);
 		binder = new PresentationModelBinder();
+		binder.setCommitDirtyValue(true);
 		LocaleContextHolder.setLocale(Locale.US);
 	}
 

org.springframework.context/src/test/java/org/springframework/model/ui/support/WebBinderTests.java

@@ -34,7 +34,8 @@ public class WebBinderTests {
 	public void setUp() {
 		LocaleContextHolder.setLocale(Locale.US);
 		presentationModel = new DefaultPresentationModel(bean);
-		binder = new WebBinder();		
+		binder = new WebBinder();
+		binder.setCommitDirtyValue(true);
 	}
 
 	@After