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package org.litesoft.core.util;
public class NewerBy
{
public static final long MILLISECS_IN_SEC = 1000;
public static final long MILLISECS_IN_MIN = 60 * MILLISECS_IN_SEC;
public static final long MILLISECS_IN_HOUR = 60 * MILLISECS_IN_MIN;
public static final long MILLISECS_IN_DAY = 24 * MILLISECS_IN_HOUR;
public static final long MILLISECS_IN_SHORT_MONTH = 28 * MILLISECS_IN_DAY;
public static final long MILLISECS_IN_LONG_MONTH = 31 * MILLISECS_IN_DAY;
public static final long MILLISECS_IN_YEAR = (long)(365.242 * MILLISECS_IN_DAY);
public static final long MILLISECS_IN_AVERAGE_MONTH = MILLISECS_IN_YEAR / 12;
public static final long MILLISECS_IN_TWO_AVERAGE_MONTHS = MILLISECS_IN_AVERAGE_MONTH + MILLISECS_IN_AVERAGE_MONTH;
private final Long mFromTimeMillis;
private final Long mToTimeMillis;
private final Boolean mNewer;
public NewerBy( Long pFromTimeMillis, Long pToTimeMillis )
{
mFromTimeMillis = pFromTimeMillis;
mToTimeMillis = pToTimeMillis;
if ( (pFromTimeMillis == null) || (pToTimeMillis == null) )
{
mNewer = null;
}
else
{
mNewer = (pToTimeMillis > pFromTimeMillis);
}
}
public boolean isNewer()
{
return Boolean.TRUE.equals( mNewer );
}
public Long getFromTimeMillis()
{
return mFromTimeMillis;
}
public Long getToTimeMillis()
{
return mToTimeMillis;
}
@Override
public String toString()
{
if ( mNewer == null )
{
return "???";
}
if ( mToTimeMillis.equals( mFromTimeMillis ) )
{
return "No Difference";
}
StringBuilder sb = new StringBuilder();
long zDelta;
if ( mNewer )
{
sb.append( "Newer" );
zDelta = mToTimeMillis - mFromTimeMillis;
}
else
{
sb.append( "Older" );
zDelta = mFromTimeMillis - mToTimeMillis;
}
sb.append( " by " );
if ( (zDelta < 0) || (MILLISECS_IN_YEAR < zDelta) )
{
sb.append( "more than a year" );
}
else if ( MILLISECS_IN_TWO_AVERAGE_MONTHS <= zDelta )
{
check( sb, zDelta, MILLISECS_IN_AVERAGE_MONTH, "month" );
}
else if ( MILLISECS_IN_LONG_MONTH < zDelta )
{
sb.append( "more than a month" );
}
else if ( MILLISECS_IN_SHORT_MONTH < zDelta )
{
sb.append( "about a month" );
}
else if ( !check( sb, zDelta, MILLISECS_IN_DAY, "day" ) )
{
if ( !check( sb, zDelta, MILLISECS_IN_HOUR, "hour" ) )
{
if ( !check( sb, zDelta, MILLISECS_IN_MIN, "minute" ) )
{
if ( !check( sb, zDelta, MILLISECS_IN_SEC, "second" ) )
{
sb.append( zDelta ).append( "ms" );
}
}
}
}
return sb.toString();
}
private boolean check( StringBuilder sb, long pDelta, long pDenominator, String pWhat )
{
if ( (pDenominator + pDenominator) <= pDelta )
{
sb.append( "about " ).append( roundUp( pDelta, pDenominator ) ).append( " " + pWhat + "s" );
return true;
}
if ( pDenominator < pDelta )
{
sb.append( "more than a " + pWhat );
return true;
}
return false;
}
private long roundUp( long pNumerator, long pDenominator )
{
return (pNumerator + (pDenominator / 2)) / pDenominator;
}
}
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Revision |
Author |
Commited |
Message |
905
|
GeorgeS
|
Wed 05 Jun, 2013 23:17:06 +0000 |
|