Add setField(target:Object, fieldName:String, value:Object) method to ReflectionUtils to set fields of an Object.

spring-data-geode-test/src/main/java/org/springframework/data/gemfire/tests/util/ReflectionUtils.java

@@ -21,6 +21,7 @@ import java.lang.reflect.Method;
 import java.util.Optional;
 
 import org.springframework.util.Assert;
+import org.springframework.util.ObjectUtils;
 
 /**
  * Utility {@link Class} for performing reflective and introspective Java {@link Object} operations.
@@ -67,4 +68,30 @@ public abstract class ReflectionUtils extends org.springframework.util.Reflectio
 		makeAccessible(method);
 		return method;
 	}
+
+	public static <T> Object setField(T target, String fieldName, Object value) throws NoSuchFieldException {
+
+		Assert.notNull(target, "Target object must not be null");
+		Assert.hasText(fieldName, String.format("Field name [%s] must be specified", fieldName));
+
+		Field field = findField(target.getClass(), fieldName);
+
+		if (field != null) {
+
+			Class<?> fieldType = field.getType();
+
+			Assert.isTrue(value == null || fieldType.isInstance(value),
+				String.format("The value type [%1$s] is not assignment compatible with the field type [%2$s]",
+					ObjectUtils.nullSafeClassName(value), fieldType.getName()));
+
+			makeAccessibleReturnField(field);
+			setField(field, target, value);
+
+			return target;
+		}
+		else {
+			throw new NoSuchFieldException(String.format("Field [%s] was not found on Object of type [%s]",
+				fieldName, target.getClass().getName()));
+		}
+	}
 }