com.mockrunner.util.common.CollectionUtil Maven / Gradle / Ivy
package com.mockrunner.util.common;
import java.util.ArrayList;
import java.util.List;
/**
* Util class for collections
*/
public class CollectionUtil
{
/**
* Fills a List with null
* by calling {@link #fillList(List, int, Object)}
* with a null object.
* @param list the List that should be filled
* @param size the resulting size of the List
*/
public static void fillList(List list, int size)
{
fillList(list, size, null);
}
/**
* Fills a List with with the specified object
* until it has the specified size. If the specified size is
* equal or lower the List size, nothing happens.
* @param list the List that should be filled
* @param size the resulting size of the List
*/
public static void fillList(List list, int size, Object object)
{
for(int ii = list.size(); ii < size; ii++)
{
list.add(object);
}
}
/**
* Returns a truncated version of the specified List.
* @param list the List
* @param len the truncate length
* @return the truncated List
*/
public static List truncateList(List list, int len)
{
if(len >= list.size()) return list;
ArrayList newList = new ArrayList(len);
for(int ii = 0; ii < len; ii++)
{
newList.add(list.get(ii));
}
return newList;
}
}