9d62deeb6f
Motivation: We can use the diamond operator these days. Modification: Use diamond operator whenever possible. Result: More modern code and less boiler-plate.
78 lines
2.3 KiB
Java
78 lines
2.3 KiB
Java
/*
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* Copyright 2014 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.handler.ssl;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* Utility class for application protocol common operations.
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*/
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final class ApplicationProtocolUtil {
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private static final int DEFAULT_LIST_SIZE = 2;
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private ApplicationProtocolUtil() {
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}
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static List<String> toList(Iterable<String> protocols) {
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return toList(DEFAULT_LIST_SIZE, protocols);
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}
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static List<String> toList(int initialListSize, Iterable<String> protocols) {
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if (protocols == null) {
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return null;
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}
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List<String> result = new ArrayList<>(initialListSize);
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for (String p : protocols) {
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if (p == null || p.isEmpty()) {
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throw new IllegalArgumentException("protocol cannot be null or empty");
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}
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result.add(p);
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}
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if (result.isEmpty()) {
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throw new IllegalArgumentException("protocols cannot empty");
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}
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return result;
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}
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static List<String> toList(String... protocols) {
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return toList(DEFAULT_LIST_SIZE, protocols);
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}
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static List<String> toList(int initialListSize, String... protocols) {
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if (protocols == null) {
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return null;
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}
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List<String> result = new ArrayList<>(initialListSize);
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for (String p : protocols) {
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if (p == null || p.isEmpty()) {
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throw new IllegalArgumentException("protocol cannot be null or empty");
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}
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result.add(p);
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}
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if (result.isEmpty()) {
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throw new IllegalArgumentException("protocols cannot empty");
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}
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return result;
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}
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}
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