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The BSD License Copyright (c) 2010-2012 RIPE NCC All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. - Neither the name of the RIPE NCC nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS 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 COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 package net.ripe.rpki.commons.util;
 
 
A versioned identifier to uniquely identify a specific version of an entity. This is used to implement optimistic locking.
 
 public class VersionedId implements Serializable {
 
     private static final long serialVersionUID = 1L;
 
     public static final long INITIAL_VERSION = -1;
 
     private final long id;
 
     private final long version;

    
Creates a versioned identifier with the initial version. Used when first creating an entity with a predefined id.
 
     public VersionedId(long id) {
         this(id);
     }
 
     public VersionedId(long idlong version) {
         this. = id;
         this. = version;
     }
 
     public long getId() {
         return ;
     }
 
     public long getVersion() {
         return ;
     }
 
     @Override
     public int hashCode() {
         final int prime = 31;
         int result = 1;
         result = prime * result + (int) ( ^ ( >>> 32));
         result = prime * result + (int) ( ^ ( >>> 32));
         return result;
     }
 
     @Override
     public boolean equals(Object obj) {
         if (this == obj) {
             return true;
         }
         if (obj == null) {
             return false;
         }
         if (getClass() != obj.getClass()) {
             return false;
         }
         final VersionedId other = (VersionedIdobj;
         if ( != other.id) {
             return false;
         }
         return  == other.version;
     }
 
     @Override
    public String toString() {
        return  + ":" + ;
    }
    public static VersionedId parse(String s) {
        Validate.notNull(s"string required");
        StringTokenizer tokenizer = new StringTokenizer(s":");
        int count = tokenizer.countTokens();
        Validate.isTrue(count == 1 || count == 2, "invalid number of tokens in versioned id");
        long id = Long.parseLong(tokenizer.nextToken());
        long version;
        if (tokenizer.hasMoreTokens()) {
            version = Long.parseLong(tokenizer.nextToken());
        } else {
            version = 0;
        }
        return new VersionedId(idversion);
    }
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