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/*
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 *
 * Copyright (c) 1997-2012 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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package org.glassfish.admin.amx.util.jmx;

import java.io.Serializable;
import javax.management.MBeanAttributeInfo;
import org.glassfish.admin.amx.util.jmx.stringifier.MBeanAttributeInfoStringifier;
import org.glassfish.admin.amx.util.jmx.stringifier.MBeanFeatureInfoStringifierOptions;

/**
Caution: this Comparator may be inconsistent with equals() because it ignores the description.
 */
public final class MBeanAttributeInfoComparator implements java.util.Comparator, Serializable
{
    private static final MBeanAttributeInfoStringifier ATTRIBUTE_INFO_STRINGIFIER =
            new MBeanAttributeInfoStringifier(new MBeanFeatureInfoStringifierOptions(false, ","));

    public static final MBeanAttributeInfoComparator INSTANCE = new MBeanAttributeInfoComparator();

    private MBeanAttributeInfoComparator()
    {
    }

    @Override
    public int compare(final MBeanAttributeInfo o1, final MBeanAttributeInfo o2)
    {
        final String s1 = ATTRIBUTE_INFO_STRINGIFIER.stringify(o1);
        final String s2 = ATTRIBUTE_INFO_STRINGIFIER.stringify(o2);

        return (s1.compareTo(s2));
    }

    @Override
    public boolean equals(Object other)
    {
        return (other instanceof MBeanAttributeInfoComparator);
    }

    @Override
    public int hashCode() {
        int hash = 7;
        return hash;
    }

}