package org.litesoft.core.typeutils;

import java.util.*;

public class Maps
{
    public static <K, V> Map<K, V> empty()
    {
        return Collections.emptyMap();
    }

    public static <K, V> Map<K, V> deNull( Map<K, V> pToCheck )
    {
        if ( pToCheck == null )
        {
            pToCheck = empty();
        }
        return pToCheck;
    }

    public static String[] stringMapToStringArray( Map<String, String> pMap )
    {
        if ( pMap == null || pMap.isEmpty() )
        {
            return Strings.EMPTY_ARRAY;
        }
        String[] rv = new String[pMap.size() * 2];
        int i = 0;
        for ( Map.Entry<String, String> zEntry : pMap.entrySet() )
        {
            rv[i++] = zEntry.getKey();
            rv[i++] = zEntry.getValue();
        }
        return rv;
    }
}