Given a List of class names, this method converts them into classes. A new List is returned. - Android java.lang.reflect

Android examples for java.lang.reflect:New Instance

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Description

Given a List of class names, this method converts them into classes. A new List is returned.

Demo Code

/*/*from   ww  w  .  j  av a  2s .  c o  m*/
 * Original work Copyright (c) 2005-2008, The Android Open Source Project
 * Modified work Copyright (c) 2013, rovo89 and Tungstwenty
 * Modified work Copyright (c) 2015, Alibaba Mobile Infrastructure (Android) Team
 *
 * 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.java2s;
import java.util.ArrayList;

import java.util.List;

public class Main {
    /**
     * <p>Given a {@code List} of class names, this method converts them into classes.</p>
     *
     * <p>A new {@code List} is returned. If the class name cannot be found, {@code null}
     * is stored in the {@code List}. If the class name in the {@code List} is
     * {@code null}, {@code null} is stored in the output {@code List}.</p>
     *
     * @param classNames  the classNames to change
     * @return a {@code List} of Class objects corresponding to the class names,
     *  {@code null} if null input
     * @throws ClassCastException if classNames contains a non String entry
     */
    public static List<Class<?>> convertClassNamesToClasses(
            List<String> classNames) {
        if (classNames == null) {
            return null;
        }
        List<Class<?>> classes = new ArrayList<Class<?>>(classNames.size());
        for (String className : classNames) {
            try {
                classes.add(Class.forName(className));
            } catch (Exception ex) {
                classes.add(null);
            }
        }
        return classes;
    }
}

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