DatabaseVersionHeaderComparator (Syncany API Documentation)

java.lang.Object
- org.syncany.operations.down.DatabaseVersionHeaderComparator

All Implemented Interfaces:

java.util.Comparator<DatabaseVersionHeader>
```
public class DatabaseVersionHeaderComparator
extends java.lang.Object
implements java.util.Comparator<DatabaseVersionHeader>
```
Comparator to be used when comparing DatabaseVersionHeaders. The comparison precedence is as follows, if the comparator is time sensitive.
1. Comparison by VectorClock
2. Comparison by timestamp/date
3. Comparison by name of the client
If the comparator is not time sensitive, the ordering is specified solely by the VectorClocks. Larger and smaller VectorClocks result in larger, respectively smaller DatabaseVersionHeaders. Equal and simultaneous VectorClocks result in equal DatabaseVersionHeaders. Note that in this case the name of the client is not used either.

Constructor Summary

Constructors
Constructor Description

DatabaseVersionHeaderComparator(boolean considerTime)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`compare(DatabaseVersionHeader dbvh1, DatabaseVersionHeader dbvh2)`	Compares the two given database versions headers and returns -1, 0 or 1 depending on which header is considered larger.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Comparator
equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

- Constructor Detail
  - DatabaseVersionHeaderComparator
```
public DatabaseVersionHeaderComparator(boolean considerTime)
```
- Method Detail
  - compare
```
public int compare(DatabaseVersionHeader dbvh1,
                   DatabaseVersionHeader dbvh2)
```
    Compares the two given database versions headers and returns -1, 0 or 1 depending on which header is considered larger. See class description for details regarding the precedence.
    
    Specified by:
    
    compare in interface java.util.Comparator<DatabaseVersionHeader>
    
    Returns:
    
    -1 if dbvh1 is smaller than dbvh2, 0 if they are equal, 1 if dbvh1 is greater than dbvh2