moved binding configuration to publis binder api

org.springframework.context/src/main/java/org/springframework/ui/binding/Binder.java

@@ -21,6 +21,7 @@ import java.util.Map;
  * Binds user-entered values to properties of a model object.
  * @author Keith Donald
  * @since 3.0
+ * @see #addBinding(String)
  * @see #getBinding(String)
  * @see #bind(Map)
  */
@@ -31,6 +32,26 @@ public interface Binder {
 	 */
 	Object getModel();
 
+	/**
+	 * Add a binding to a model property.
+	 * The property may be a path to a member property like "name", or a nested property like "address.city" or "addresses.city".
+	 * If the property path is nested and traverses a collection or Map, do not use indexes.
+	 * The property path should express the model-class property structure like addresses.city, not an object structure like addresses[0].city.
+	 * Examples:
+	 * <pre>
+	 * name - bind to property 'name'
+	 * addresses - bind to property 'addresses', presumably a List&lt;Address&gt; e.g. allowing property expressions like addresses={ 12345 Macy Lane, 1977 Bel Aire Estates } and addresses[0]=12345 Macy Lane
+	 * addresses.city - bind to property 'addresses.city', for all indexed addresses in the collection e.g. allowing property expressions like addresses[0].city=Melbourne
+	 * address.city - bind to property 'address.city'
+	 * favoriteFoodByFoodGroup - bind to property 'favoriteFoodByFoodGroup', presumably a Map<FoodGroup, Food>; e.g. allowing favoriteFoodByFoodGroup={ DAIRY=Milk, MEAT=Steak } and favoriteFoodByFoodGroup['DAIRY']=Milk
+	 * favoriteFoodByFoodGroup.name - bind to property 'favoriteFoodByFoodGroup.name', for all keyed Foods in the map; e.g. allowing favoriteFoodByFoodGroup['DAIRY'].name=Milk
+	 * </pre>
+	 * @param propertyPath the model property path
+	 * @return a BindingConfiguration object, allowing additional configuration of the newly added binding
+	 * @throws IllegalArgumentException if no such property path exists on the model
+	 */
+	public BindingConfiguration addBinding(String propertyPath);
+	
 	/**
 	 * Get a binding to a model property..
 	 * @param property the property path

org.springframework.context/src/main/java/org/springframework/ui/binding/BindingConfiguration.java

@@ -13,12 +13,13 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.springframework.ui.binding.support;
+package org.springframework.ui.binding;
 
+import org.springframework.ui.binding.support.GenericBinder;
 import org.springframework.ui.format.Formatter;
 
 /**
- * A fluent interface for configuring a newly added binding to a property path.
+ * A fluent interface for configuring a newly added binding.
  * @author Keith Donald
  * @see GenericBinder#addBinding(String)
  */

org.springframework.context/src/main/java/org/springframework/ui/binding/support/DefaultBindingConfiguration.java

@@ -15,6 +15,7 @@
  */
 package org.springframework.ui.binding.support;
 
+import org.springframework.ui.binding.BindingConfiguration;
 import org.springframework.ui.format.Formatter;
 
 final class DefaultBindingConfiguration implements BindingConfiguration {

org.springframework.context/src/main/java/org/springframework/ui/binding/support/GenericBinder.java

@@ -55,6 +55,7 @@ import org.springframework.ui.alert.Alert;
 import org.springframework.ui.alert.Severity;
 import org.springframework.ui.binding.Binder;
 import org.springframework.ui.binding.Binding;
+import org.springframework.ui.binding.BindingConfiguration;
 import org.springframework.ui.binding.BindingResult;
 import org.springframework.ui.binding.BindingResults;
 import org.springframework.ui.binding.MissingSourceValuesException;
@@ -84,7 +85,7 @@ public class GenericBinder implements Binder {
 
 	private Object model;
 
-	private Set<BindingFactory> bindingFactories;
+	public Set<BindingFactory> bindingFactories;
 
 	private FormatterRegistry formatterRegistry = new GenericFormatterRegistry();
 
@@ -269,7 +270,7 @@ public class GenericBinder implements Binder {
 		return context;
 	}
 
-	class BindingFactory {
+	public class BindingFactory {
 
 		private DefaultBindingConfiguration configuration;