69 lines
2.6 KiB
Java
69 lines
2.6 KiB
Java
/****************************************************************
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* Licensed to the Apache Software Foundation (ASF) under one *
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* or more contributor license agreements. See the NOTICE file *
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* distributed with this work for additional information *
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* regarding copyright ownership. The ASF licenses this file *
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* to you under the Apache License, Version 2.0 (the *
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* "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, *
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* software distributed under the License is distributed on an *
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY *
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* KIND, either express or implied. See the License for the *
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* specific language governing permissions and limitations *
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* under the License. *
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****************************************************************/
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package org.apache.james.mailbox;
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import java.io.Serializable;
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import java.util.Comparator;
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import org.apache.james.mailbox.model.MailboxConstants;
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import org.apache.james.mailbox.model.MailboxMetaData;
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/**
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* Orders by name with INBOX first.
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*/
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public class StandardMailboxMetaDataComparator implements Comparator<MailboxMetaData>, Serializable {
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private static final long serialVersionUID = 1L;
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/**
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* Static comparison.
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*
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* @param one
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* possibly null
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* @param two
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* possibly null
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* @return {@link Comparator#compare(Object, Object)}
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*/
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public static int order(MailboxMetaData one, MailboxMetaData two) {
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final String nameTwo = two.getPath().getName();
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final int result;
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final String nameOne = one.getPath().getName();
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if (MailboxConstants.INBOX.equals(nameOne)) {
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result = MailboxConstants.INBOX.equals(nameTwo) ? 0 : -1;
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} else if (MailboxConstants.INBOX.equals(nameTwo)) {
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result = 1;
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} else if (nameOne == null) {
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result = nameTwo == null ? 0 : 1;
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} else if (nameTwo == null) {
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result = -1;
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} else {
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result = nameOne.compareTo(nameTwo);
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}
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return result;
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}
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/**
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* @see Comparator#compare(Object, Object)
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*/
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public int compare(MailboxMetaData one, MailboxMetaData two) {
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return order(one, two);
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}
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}
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