Field

Field Manipulation using Mirror. Just to inform, field lookup is also done on superclasses and interfaces.

Reflecting

Reflect a field by name (will return null if not found):


Class clazz;

Field f = new Mirror().on(clazz).reflect().field("fieldName");

Reflecting all fields of a class (will return an empty list if none found):


Class clazz;

List<Field> l = new Mirror().on(clazz).reflectAll().fields();

Reflecting all fields of a class that matches a Matcher<Field> (will return an empty list if none found):


Class clazz;

List<Field> l = new Mirror().on(clazz).reflectAll().fields()

                                     .matching(new YourCustomMatcher());

You can also map your fields to other types:


Class clazz;

List<String> l = new Mirror().on(clazz).reflectAll().fields()

                                    .mappingTo(new YourFieldToStringMapper());

Setting Values

Setting value of a static field:


Class clazz;

new Mirror().on(clazz).set().field("fieldName").withValue(value);

Setting value of an instance field:


Object target;

new Mirror().on(target).set().field("fieldName").withValue(value);

You can also pass a java.lang.reflect.Field instead of fieldName String: Setting value of a static field:


Field aField;

Class clazz;

new Mirror().on(clazz).set().field(aField).withValue(value);

Getting Values

Getting value of a static field:


Class clazz;

Object value = new Mirror().on(clazz).get().field("fieldName");

Getting value of a instance field:


Object target;

Object value = new Mirror().on(target).get().field("fieldName");

You can also pass a java.lang.reflect.Field instead of fieldName String: Getting value of a static field:


Field aField;

Class clazz;

Object value = new Mirror().on(clazz).get().field(aField);