com.antonjohansson.elasticsearchshell.utils.ReflectionUtils.java Source code

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Here is the source code for com.antonjohansson.elasticsearchshell.utils.ReflectionUtils.java

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/**
 * Copyright 2017 Anton Johansson
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.antonjohansson.elasticsearchshell.utils;

import java.lang.reflect.Field;

import org.apache.commons.lang3.reflect.FieldUtils;

/**
 * Defines utilities for managing reflection, used across the application.
 */
public final class ReflectionUtils {
    // Prevent instantiation.
    private ReflectionUtils() {
    }

    /**
     * Gets the value of a field of an object.
     *
     * @param clazz The class of the object to get field value from.
     * @param object The object to get field value from.
     * @param fieldName The name of the field to get value from.
     * @return Returns the field value.
     */
    @SuppressWarnings("unchecked")
    public static <V, T> V getFieldValue(Class<T> clazz, T object, String fieldName) {
        Field field = FieldUtils.getField(clazz, fieldName, true);
        try {
            return (V) field.get(object);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}