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A collection of human readable utility methods.

There is a newer version: 2.0.6

package com.notronix.albacore;

import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

public abstract class ContainerUtils
{
    public static boolean thereAreMultiple(Collection items)
    {
        return (numberOf(items) > 1);
    }

    public static boolean thereAreMultiple(Map items)
    {
        return (numberOf(items) > 1);
    }

    public static boolean thereAreOneOrMore(Collection items)
    {
        return (numberOf(items) > 0);
    }

    public static boolean thereAreOneOrMore(Map items)
    {
        return (numberOf(items) > 0);
    }

    public static boolean thereAreNo(Collection items)
    {
        return !thereAreOneOrMore(items);
    }

    public static boolean thereAreNo(Map items)
    {
        return !thereAreOneOrMore(items);
    }

    public static  T theFirst(Collection items)
    {
        if (thereAreNo(items))
        {
            return null;
        }

        return items.iterator().next();
    }

    public static  T theSecond(Collection items)
    {
        if (numberOf(items) < 2)
        {
            return null;
        }

        if (items instanceof List)
        {
            return ((List) items).get(1);
        }

        Iterator iterator = items.iterator();
        iterator.next();

        return iterator.next();
    }

    public static int numberOf(Collection items)
    {
        return (items == null ? 0 : items.size());
    }

    public static int numberOf(Map items)
    {
        return (items == null ? 0 : items.size());
    }
}