com.cantaa.util.ReflectionUtil Maven / Gradle / Ivy
package com.cantaa.util;
import java.lang.reflect.Field;
/**
* @author Hans Lesmeister
*/
public class ReflectionUtil {
public static void setFieldValue(Object target, String fieldName, Object value) {
Field fld = findField(target.getClass(), fieldName, null);
if (fld == null) {
return;
}
if (!fld.isAccessible()) {
fld.setAccessible(true);
}
try {
fld.set(target, value);
}
catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
/**
* Attempt to find a {@link Field field} on the supplied {@link Class} with the
* supplied {@code name} and/or {@link Class type}. Searches all superclasses
* up to {@link Object}.
*
* (Borrowed from Spring)
*
* @param clazz the class to introspect
* @param name the name of the field (may be {@code null} if type is specified)
* @param type the type of the field (may be {@code null} if name is specified)
* @return the corresponding Field object, or {@code null} if not found
*/
public static Field findField(Class clazz, String name, Class type) {
Reject.ifNull(clazz, "Class must not be null");
Reject.ifFalse(name != null || type != null, "Either name or type of the field must be specified");
Class searchType = clazz;
while (!Object.class.equals(searchType) && searchType != null) {
Field[] fields = searchType.getDeclaredFields();
for (Field field : fields) {
if ((name == null || name.equals(field.getName())) && (type == null || type.equals(field.getType()))) {
return field;
}
}
searchType = searchType.getSuperclass();
}
return null;
}
}