SpringValidatorAdapter skips value retrieval for Set field without index

Issue: SPR-16177

Author: jhoeller

spring-context-support/src/test/java/org/springframework/validation/beanvalidation2/SpringValidatorAdapterTests.java

@@ -21,11 +21,16 @@
 import java.lang.annotation.Repeatable;
 import java.lang.annotation.Retention;
 import java.lang.annotation.Target;
+import java.lang.reflect.Field;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
+import java.util.LinkedHashSet;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
+import java.util.Set;
 import javax.validation.Constraint;
 import javax.validation.ConstraintValidator;
 import javax.validation.ConstraintValidatorContext;
@@ -148,6 +153,44 @@ public void testApplyMessageSourceResolvableToStringArgumentValueWithAlwaysUseMe
 				is("Email required"));
 	}
 
+	@Test  // SPR-16177
+	public void testWithList() {
+		Parent parent = new Parent();
+		parent.setName("Parent whit list");
+		parent.getChildList().addAll(createChildren(parent));
+
+		BeanPropertyBindingResult errors = new BeanPropertyBindingResult(parent, "parent");
+		validatorAdapter.validate(parent, errors);
+
+		assertTrue(errors.getErrorCount() > 0);
+	}
+
+	@Test  // SPR-16177
+	public void testWithSet() {
+		Parent parent = new Parent();
+		parent.setName("Parent whith set");
+		parent.getChildSet().addAll(createChildren(parent));
+
+		BeanPropertyBindingResult errors = new BeanPropertyBindingResult(parent, "parent");
+		validatorAdapter.validate(parent, errors);
+
+		assertTrue(errors.getErrorCount() > 0);
+	}
+
+	private List<Child> createChildren(Parent parent) {
+		Child child1 = new Child();
+		child1.setName("Child1");
+		child1.setAge(null);
+		child1.setParent(parent);
+
+		Child child2 = new Child();
+		child2.setName(null);
+		child2.setAge(17);
+		child2.setParent(parent);
+
+		return Arrays.asList(child1, child2);
+	}
+
 	@Test  // SPR-15839
 	public void testListElementConstraint() {
 		BeanWithListElementConstraint bean = new BeanWithListElementConstraint();
@@ -308,6 +351,143 @@ public boolean isValid(Object value, ConstraintValidatorContext context) {
 	}
 
 
+	public static class Parent {
+
+		private Integer id;
+
+		@NotNull
+		private String name;
+
+		@Valid
+		private Set<Child> childSet = new LinkedHashSet<>();
+
+		@Valid
+		private List<Child> childList = new LinkedList<>();
+
+		public Integer getId() {
+			return id;
+		}
+
+		public void setId(Integer id) {
+			this.id = id;
+		}
+
+		public String getName() {
+			return name;
+		}
+
+		public void setName(String name) {
+			this.name = name;
+		}
+
+		public Set<Child> getChildSet() {
+			return childSet;
+		}
+
+		public void setChildSet(Set<Child> childSet) {
+			this.childSet = childSet;
+		}
+
+		public List<Child> getChildList() {
+			return childList;
+		}
+
+		public void setChildList(List<Child> childList) {
+			this.childList = childList;
+		}
+	}
+
+
+	@AnythingValid
+	public static class Child {
+
+		private Integer id;
+
+		@javax.validation.constraints.NotNull
+		private String name;
+
+		@javax.validation.constraints.NotNull
+		private Integer age;
+
+		@javax.validation.constraints.NotNull
+		private Parent parent;
+
+		public Integer getId() {
+			return id;
+		}
+
+		public void setId(Integer id) {
+			this.id = id;
+		}
+
+		public String getName() {
+			return name;
+		}
+
+		public void setName(String name) {
+			this.name = name;
+		}
+
+		public Integer getAge() {
+			return age;
+		}
+
+		public void setAge(Integer age) {
+			this.age = age;
+		}
+
+		public Parent getParent() {
+			return parent;
+		}
+
+		public void setParent(Parent parent) {
+			this.parent = parent;
+		}
+	}
+
+
+	@Constraint(validatedBy = AnythingValidator.class)
+	@Retention(RUNTIME)
+	public @interface AnythingValid {
+
+		String message() default "{AnythingValid.message}";
+
+		Class<?>[] groups() default {};
+
+		Class<? extends Payload>[] payload() default {};
+	}
+
+
+	public static class AnythingValidator implements ConstraintValidator<AnythingValid, Object> {
+
+		private static final String ID = "id";
+
+		@Override
+		public void initialize(AnythingValid constraintAnnotation) {
+		}
+
+		@Override
+		public boolean isValid(Object value, ConstraintValidatorContext context) {
+			List<Field> fieldsErros = new ArrayList<>();
+			Arrays.asList(value.getClass().getDeclaredFields()).forEach(f -> {
+				f.setAccessible(true);
+				try {
+					if (!f.getName().equals(ID) && f.get(value) == null) {
+						fieldsErros.add(f);
+						context.buildConstraintViolationWithTemplate(context.getDefaultConstraintMessageTemplate())
+								.addPropertyNode(f.getName())
+								.addConstraintViolation();
+					}
+				} catch (IllegalAccessException ex) {
+					throw new IllegalStateException(ex);
+				}
+
+			});
+			return fieldsErros.isEmpty();
+		}
+	}
+
+
 	public class BeanWithListElementConstraint {
 
 		@Valid

spring-context/src/main/java/org/springframework/validation/beanvalidation/SpringValidatorAdapter.java

@@ -285,8 +285,8 @@ protected MessageSourceResolvable getResolvableField(String objectName, String f
 	@Nullable
 	protected Object getRejectedValue(String field, ConstraintViolation<Object> violation, BindingResult bindingResult) {
 		Object invalidValue = violation.getInvalidValue();
-		if (!"".equals(field) && (invalidValue == violation.getLeafBean() ||
-				(!field.contains("[]") && (field.contains("[") || field.contains("."))))) {
+		if (!"".equals(field) && !field.contains("[]") &&
+				(invalidValue == violation.getLeafBean() || field.contains("[") || field.contains("."))) {
 			// Possibly a bean constraint with property path: retrieve the actual property value.
 			// However, explicitly avoid this for "address[]" style paths that we can't handle.
 			invalidValue = bindingResult.getRawFieldValue(field);