Package org.mongolink.utils

Source Code of org.mongolink.utils.Fields

/*
* MongoLink, Object Document Mapper for Java and MongoDB
*
* Copyright (c) 2012, Arpinum or third-party contributors as
* indicated by the contributors.txt file
*
* MongoLink is free software: you can redistribute it and/or modify
* it under the terms of the Lesser GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* MongoLink is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* Lesser GNU General Public License for more details.
*
* You should have received a copy of the Lesser GNU General Public License
* along with MongoLink.  If not, see <http://www.gnu.org/licenses/>.
*/

package org.mongolink.utils;

import org.mongolink.MongoLinkError;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.lang.reflect.Field;

public final class Fields {
    static void setValue(Field field, Object instance, Object value) {
        try {
            field.set(instance, value);
        } catch (Exception e) {
            LOGGER.error("Error setting property {} with value {} in {}", field.getName(), value, field.getDeclaringClass().getName(), e);
        }
    }

    static Object getValue(Object instance, Field field) throws IllegalAccessException {
        try {
            return field.get(instance);
        } catch (Exception e) {
            throw new MongoLinkError("Can't get field value", e);
        }
    }

    public static Field find(final Class<?> clazz, final String fieldName) {
        Field result;
        try {
            result = clazz.getDeclaredField(fieldName);
        } catch (final NoSuchFieldException e) {
            if (clazz.getSuperclass() != null) {
                return find(clazz.getSuperclass(), fieldName);
            }
            throw new MongoLinkError("Unable to find field", e);
        }
        return result;
    }

    private static final Logger LOGGER = LoggerFactory.getLogger(Fields.class);
}
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