io.javarig.util.Utils Maven / Gradle / Ivy

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package io.javarig.util;

import java.lang.reflect.Field;
import java.util.Arrays;
import java.util.Optional;

public class Utils {
    public static String getFieldNameFromSetterMethodName(String setterMethodName, String setterPrefix) {
        String fieldName = setterMethodName.replaceFirst(setterPrefix, "");
        return Character.toLowerCase(fieldName.charAt(0)) + fieldName.substring(1);
    }

    public static Field getOwnOrInheritedFieldByName(Class type, String fieldName) throws NoSuchFieldException {
        for (Class c = type; c != null; c = c.getSuperclass()) {
            Optional optionalField = Arrays.stream(c.getDeclaredFields()).filter(field -> field.getName().equals(fieldName)).findFirst();
            if (optionalField.isPresent()) return optionalField.get();
        }
        throw new NoSuchFieldException(fieldName);
    }

    // will be used later
    public static boolean isClassGeneric(Class aClass) {
        return aClass != null && aClass.getTypeParameters().length > 0;
    }
}