/*
 * 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,
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package org.apache.catalina.manager.util;

import java.util.Comparator;

import org.apache.catalina.Session;

Comparator which permits to compare on a session's content.
Author:Cédrik LIME
Type parameters:
  • <T> – The type of the session content to be compared
/** * Comparator which permits to compare on a session's content. * * @param <T> The type of the session content to be compared * * @author C&eacute;drik LIME */
public abstract class BaseSessionComparator<T> implements Comparator<Session> { /** * */ public BaseSessionComparator() { super(); } public abstract Comparable<T> getComparableObject(Session session); /* (non-Javadoc) * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object) */ @SuppressWarnings("unchecked") @Override public final int compare(Session s1, Session s2) { Comparable<T> c1 = getComparableObject(s1); Comparable<T> c2 = getComparableObject(s2); return c1==null ? (c2==null ? 0 : -1) : (c2==null ? 1 : c1.compareTo((T)c2)); } }