1:  2:  3:  4:  5:  6:  7:  8:  9: 10: 11: 12: 13: 14: 15: 16: 17: 18: 19: 20: 21: 22: 23: 24: 25: 26: 27: 28: 29: 30: 31: 32: 33: 34: 35: 36: 37: 38: 39: 40: 41: 42: 43: 44: 45: 46: 47: 48: 49: 50: 51: 52: 53: 54: 55: 

<?php

/**
 * Copyright 2018 LINE Corporation
 *
 * LINE Corporation licenses this file to you 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:
 *
 *   https://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.
 */

namespace LINE\LINEBot\Util;

/**
 * A utility class for builder class.
 *
 * @package LINE\LINEBot\Util
 */
class BuildUtil
{
    /**
     * Execute build method and return result.
     *
     * @param object|null $builder
     * @param string|null $buiildMethod
     *
     * @return mixed|null
     */
    public static function build($builder = null, $buiildMethod = 'build')
    {
        return is_null($builder) ? null : $builder->$buiildMethod();
    }

    /**
     * Remove null elements from array.
     *
     * @param array $ary
     *
     * @return array
     */
    public static function removeNullElements($ary)
    {
        return array_filter($ary, function ($v) {
            return !is_null($v);
        });
    }
}