Java Reflection Field Find findField(Class clazz, String name)

Description

find Field

License

Open Source License

Declaration

public static Field findField(Class<?> clazz, String name) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.lang.reflect.Field;

public class Main {

    public static Field findField(Class<?> clazz, String name) {
        return findField(clazz, name, null);
    }//from   ww  w  .  j av  a2 s  .c  o m

    public static Field findField(Class<?> clazz, String name, Class<?> type) {
        if (clazz == null) {
            throw new IllegalArgumentException("Class must not be null");
        }

        if (name == null && type == null) {
            throw new IllegalArgumentException("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;
    }
}

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