    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      https://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017
    018package org.apache.commons.io.charset;
    019
    020import java.nio.charset.Charset;
    021import java.nio.charset.CharsetDecoder;
    022
    023/**
    024 * Works with {@link CharsetDecoder}.
    025 *
    026 * @since 2.12.0
    027 */
    028public final class CharsetDecoders {
    029
    030    /**
    031     * Returns the given non-null CharsetDecoder or a new default CharsetDecoder.
    032     * <p>
    033     * Null input maps to the virtual machine's {@link Charset#defaultCharset() default charset} decoder.
    034     * </p>
    035     *
    036     * @param charsetDecoder The CharsetDecoder to test.
    037     * @return the given non-null CharsetDecoder or a new default CharsetDecoder.
    038     */
    039    public static CharsetDecoder toCharsetDecoder(final CharsetDecoder charsetDecoder) {
    040        return charsetDecoder != null ? charsetDecoder : Charset.defaultCharset().newDecoder();
    041    }
    042
    043    /** No instances. */
    044    private CharsetDecoders() {
    045        // No instances.
    046    }
    047}