foundation.cmo.api.mls.graphql.security.services.CopyFieldsUtils Maven / Gradle / Ivy
package foundation.cmo.api.mls.graphql.security.services;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
public class CopyFieldsUtils {
public static void copyAtoB(Object a, Object b) {
if (a == null || b == null) {
return;
}
Collection fieldsA = getAllFields(a.getClass());
Collection fieldsB = getAllFields(b.getClass());
fieldsA.forEach((fieldA) -> {
fieldsB.stream().filter((fieldB) -> (fieldA.getName().equals(fieldB.getName())))
.forEachOrdered((fieldB) -> {
try {
fieldA.setAccessible(true);
fieldB.setAccessible(true);
Object objA = fieldA.get(a);
Object objB = fieldB.get(b);
if (objB == null) {
fieldB.set(b, objA);
}
} catch (IllegalAccessException | IllegalArgumentException | SecurityException e) {
e.printStackTrace(System.err);
}
});
});
}
private static Collection getAllFields(Class type) {
Collection ret = new ArrayList<>();
while (type != Object.class) {
ret.addAll(Arrays.asList(type.getDeclaredFields()));
type = type.getSuperclass();
}
return ret;
}
public static Method getMethod(Class type, String name) {
List methods = new ArrayList<>();
methods.addAll(Arrays.asList(type.getDeclaredMethods()));
methods.addAll(Arrays.asList(type.getMethods()));
for (Method method : methods) {
if (method.getName().equals(name)) {
return method;
}
}
throw new UnsupportedOperationException("Method not found");
}
}