Predictable index position for BindingResult keys and parameter annotation convenience methods in MethodParameter

git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@4149 50f2f4bb-b051-0410-bef5-90022cba6387

org.springframework.context/src/main/java/org/springframework/validation/AbstractBindingResult.java

@@ -19,8 +19,8 @@ package org.springframework.validation;
 import java.beans.PropertyEditor;
 import java.io.Serializable;
 import java.util.Collections;
-import java.util.HashMap;
 import java.util.HashSet;
+import java.util.LinkedHashMap;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
@@ -270,11 +270,11 @@ public abstract class AbstractBindingResult extends AbstractErrors implements Bi
 	 * @see org.springframework.web.servlet.mvc.SimpleFormController
 	 */
 	public Map<String, Object> getModel() {
-		Map<String, Object> model = new HashMap<String, Object>(2);
-		// Errors instance, even if no errors.
-		model.put(MODEL_KEY_PREFIX + getObjectName(), this);
+		Map<String, Object> model = new LinkedHashMap<String, Object>(2);
 		// Mapping from name to target object.
 		model.put(getObjectName(), getTarget());
+		// Errors instance, even if no errors.
+		model.put(MODEL_KEY_PREFIX + getObjectName(), this);
 		return model;
 	}
 

org.springframework.core/src/main/java/org/springframework/core/MethodParameter.java

@@ -278,6 +278,20 @@ public class MethodParameter {
 		return null;
 	}
 
+	/**
+	 * Return true if the parameter has at least one annotation, false if it has none.
+	 */
+	public boolean hasParameterAnnotations() {
+		return getParameterAnnotations().length != 0;
+	}
+
+	/**
+	 * Return true if the parameter has the given annotation type, and false if it doesn't.
+	 */
+	public <T extends Annotation> boolean hasParameterAnnotation(Class<T> annotationType) {
+		return getParameterAnnotation(annotationType) != null;
+	}
+
 	/**
 	 * Initialize parameter name discovery for this method parameter.
 	 * <p>This method does not actually try to retrieve the parameter name at