Find the last modified of an entry from JNDI. - Java javax.naming.directory

Java examples for javax.naming.directory:Attributes

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Description

Find the last modified of an entry from JNDI.

Demo Code

/*/*from  w  w w  . j av  a  2s  .c  om*/
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    distribution.
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 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:  
 *       "This product includes software developed by the 
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written 
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * <http://www.apache.org/>.
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 * [Additional notices, if required by prior licensing conditions]
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 */
//package com.java2s;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import javax.naming.NamingException;
import javax.naming.directory.Attribute;
import javax.naming.directory.Attributes;

public class Main {
    /**
     * Last modification date. XXX Use standard LDAP att name
     */
    public static final String LAST_MODIFIED = "getlastmodified";
    public static final String ALTERNATE_LAST_MODIFIED = "last-modified";
    /**
     * Date formats using for Date parsing.
     */
    protected static final SimpleDateFormat formats[] = {
            new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.US),
            new SimpleDateFormat("EEE MMM dd HH:mm:ss zzz yyyy", Locale.US),
            new SimpleDateFormat("EEEEEE, dd-MMM-yy HH:mm:ss zzz",
                    Locale.US),
            new SimpleDateFormat("EEE MMMM d HH:mm:ss yyyy", Locale.US) };

    /** Find the last modified of an entry. It's using various common
     *  attribute names, and support Long, Date, String att values.
     */
    public static long getLastModified(Attributes attributes) {
        long lastModified = -1;
        Date lastModifiedDate;

        Attribute attribute = attributes.get(LAST_MODIFIED);
        if (attribute == null)
            attribute = attributes.get(ALTERNATE_LAST_MODIFIED);

        if (attribute != null) {
            try {
                Object value = attribute.get();
                if (value instanceof Long) {
                    lastModified = ((Long) value).longValue();
                } else if (value instanceof Date) {
                    lastModified = ((Date) value).getTime();
                    lastModifiedDate = (Date) value;
                } else {
                    String lastModifiedDateValue = value.toString();
                    Date result = null;
                    // Parsing the HTTP Date
                    for (int i = 0; (result == null)
                            && (i < formats.length); i++) {
                        try {
                            result = formats[i]
                                    .parse(lastModifiedDateValue);
                        } catch (ParseException e) {
                            ;
                        }
                    }
                    if (result != null) {
                        lastModified = result.getTime();
                        lastModifiedDate = result;
                    }
                }
            } catch (NamingException e) {
                ; // No value for the attribute
            }
        }
        return lastModified;
    }
}

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