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25
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1 package treecms.proto.id;
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2
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3 import treecms.proto.api.NodeID;
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4 import java.util.concurrent.atomic.AtomicLong;
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5
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26
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6 public class IncrementalNodeID implements NodeID
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25
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7 {
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8 private String m_inheritedID;
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9 private final long m_version;
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10
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11 private AtomicLong m_tip;
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12
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26
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13 public IncrementalNodeID(String _inheritedID,AtomicLong _version)
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25
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14 {
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15 m_inheritedID = _inheritedID;
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16 m_version = _version.getAndIncrement();
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17 m_tip = _version;
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18 }
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19
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20 String getInheritedID()
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21 {
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22 return m_inheritedID;
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23 }
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24
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25 long getVersion()
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26 {
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27 return m_version;
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28 }
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29
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30 AtomicLong getTip()
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31 {
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32 return m_tip;
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33 }
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34
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35 @Override
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36 public int compare(NodeID _target)
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37 {
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38 // TODO Auto-generated method stub
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26
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39 if(!(_target instanceof IncrementalNodeID)){
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40 throw new IllegalArgumentException("_target is not instance of NodeIDImpl");
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41 }
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42
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43 IncrementalNodeID target = (IncrementalNodeID)_target;
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44 if(m_inheritedID.equals(target.m_inheritedID)){
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45 long diff = m_version - target.m_version;
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25
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46 if(diff == 0){
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47 return 0;
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48 }else if(diff < 0){
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49 return -1;
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50 }else{
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51 return 1;
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52 }
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53 }
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54 return -2;
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55 }
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56
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57 @Override
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58 public String toString()
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59 {
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60 return m_inheritedID + "@" + m_version;
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61 }
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62 }
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