e8efcd82a8
Motivation: We can just use Objects.requireNonNull(...) as a replacement for ObjectUtil.checkNotNull(....) Modifications: - Use Objects.requireNonNull(...) Result: Less code to maintain.
135 lines
4.3 KiB
Java
135 lines
4.3 KiB
Java
/*
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* Copyright 2016 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.codec.smtp;
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import static java.util.Objects.requireNonNull;
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import io.netty.util.AsciiString;
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import io.netty.util.internal.UnstableApi;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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/**
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* Provides utility methods to create {@link SmtpRequest}s.
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*/
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@UnstableApi
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public final class SmtpRequests {
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private static final SmtpRequest DATA = new DefaultSmtpRequest(SmtpCommand.DATA);
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private static final SmtpRequest NOOP = new DefaultSmtpRequest(SmtpCommand.NOOP);
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private static final SmtpRequest RSET = new DefaultSmtpRequest(SmtpCommand.RSET);
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private static final SmtpRequest HELP_NO_ARG = new DefaultSmtpRequest(SmtpCommand.HELP);
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private static final SmtpRequest QUIT = new DefaultSmtpRequest(SmtpCommand.QUIT);
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private static final AsciiString FROM_NULL_SENDER = AsciiString.cached("FROM:<>");
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/**
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* Creates a {@code HELO} request.
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*/
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public static SmtpRequest helo(CharSequence hostname) {
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return new DefaultSmtpRequest(SmtpCommand.HELO, hostname);
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}
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/**
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* Creates a {@code EHLO} request.
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*/
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public static SmtpRequest ehlo(CharSequence hostname) {
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return new DefaultSmtpRequest(SmtpCommand.EHLO, hostname);
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}
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/**
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* Creates a {@code NOOP} request.
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*/
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public static SmtpRequest noop() {
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return NOOP;
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}
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/**
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* Creates a {@code DATA} request.
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*/
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public static SmtpRequest data() {
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return DATA;
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}
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/**
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* Creates a {@code RSET} request.
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*/
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public static SmtpRequest rset() {
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return RSET;
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}
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/**
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* Creates a {@code HELP} request.
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*/
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public static SmtpRequest help(String cmd) {
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return cmd == null ? HELP_NO_ARG : new DefaultSmtpRequest(SmtpCommand.HELP, cmd);
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}
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/**
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* Creates a {@code QUIT} request.
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*/
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public static SmtpRequest quit() {
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return QUIT;
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}
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/**
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* Creates a {@code MAIL} request.
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*/
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public static SmtpRequest mail(CharSequence sender, CharSequence... mailParameters) {
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if (mailParameters == null || mailParameters.length == 0) {
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return new DefaultSmtpRequest(SmtpCommand.MAIL,
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sender != null ? "FROM:<" + sender + '>' : FROM_NULL_SENDER);
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} else {
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List<CharSequence> params = new ArrayList<>(mailParameters.length + 1);
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params.add(sender != null? "FROM:<" + sender + '>' : FROM_NULL_SENDER);
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Collections.addAll(params, mailParameters);
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return new DefaultSmtpRequest(SmtpCommand.MAIL, params);
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}
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}
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/**
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* Creates a {@code RCPT} request.
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*/
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public static SmtpRequest rcpt(CharSequence recipient, CharSequence... rcptParameters) {
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requireNonNull(recipient, "recipient");
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if (rcptParameters == null || rcptParameters.length == 0) {
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return new DefaultSmtpRequest(SmtpCommand.RCPT, "TO:<" + recipient + '>');
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} else {
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List<CharSequence> params = new ArrayList<>(rcptParameters.length + 1);
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params.add("TO:<" + recipient + '>');
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Collections.addAll(params, rcptParameters);
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return new DefaultSmtpRequest(SmtpCommand.RCPT, params);
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}
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}
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/**
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* Creates a {@code EXPN} request.
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*/
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public static SmtpRequest expn(CharSequence mailingList) {
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return new DefaultSmtpRequest(SmtpCommand.EXPN, requireNonNull(mailingList, "mailingList"));
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}
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/**
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* Creates a {@code VRFY} request.
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*/
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public static SmtpRequest vrfy(CharSequence user) {
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return new DefaultSmtpRequest(SmtpCommand.VRFY, requireNonNull(user, "user"));
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}
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private SmtpRequests() { }
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}
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