Java tutorial
/**************************************************************** * Licensed to the Apache Software Foundation (ASF) under one * * or more contributor license agreements. See the NOTICE file * * distributed with this work for additional information * * regarding copyright ownership. The ASF 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 * * * * 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 org.apache.james.utils; import java.util.List; import java.util.Objects; import com.google.common.base.Joiner; import com.google.common.base.Splitter; public class SMTPSendingException extends RuntimeException { public static boolean isForStep(Throwable t, SmtpSendingStep step) { if (t instanceof SMTPSendingException) { SMTPSendingException e = (SMTPSendingException) t; return e.sendingStep.equals(step); } return false; } private static String sanitizeString(String lastServerMessage) { List<String> lines = Splitter.on("\r\n").trimResults().omitEmptyStrings().splitToList(lastServerMessage); return Joiner.on("\n").skipNulls().join(lines); } private final SmtpSendingStep sendingStep; private final String lastServerMessage; public SMTPSendingException(SmtpSendingStep sendingStep, String lastServerMessage) { super(String.format("Error upon step %s: %s", sendingStep, lastServerMessage)); this.sendingStep = sendingStep; this.lastServerMessage = sanitizeString(lastServerMessage); } @Override public final boolean equals(Object o) { if (o instanceof SMTPSendingException) { SMTPSendingException that = (SMTPSendingException) o; return Objects.equals(this.sendingStep, that.sendingStep) && Objects.equals(this.lastServerMessage, that.lastServerMessage); } return false; } @Override public final int hashCode() { return Objects.hash(sendingStep, lastServerMessage); } }