package org.scribe.utils;

import java.util.*;

public class MapUtils

{

public static final Map<String, List<String>> sort(Map<String, List<String>> map)

{

Preconditions.checkNotNull(map, "Cannot sort a null object.");

Map<String, List<String>> sorted = new LinkedHashMap<String, List<String>>();

for (String key : getSortedKeys(map))

{

if(map.get(key).size() > 1)

{

Collections.sort(map.get(key));

}

sorted.put(key, map.get(key));

}

return sorted;

}

private static List<String> getSortedKeys(Map<String, List<String>> map)

{

List<String> keys = new ArrayList<String>(map.keySet());

Collections.sort(keys);

return keys;

}

@SuppressWarnings("unchecked")

public static final <T> Map<String, List<T>> toListMap(Map<String, T> map)

{

Preconditions.checkNotNull(map, "Cannot sort a null object.");

Map<String, List<T>> result = new HashMap<String, List<T>>();

for (Map.Entry<String, T> entry : map.entrySet())

{

result.put(entry.getKey(), Arrays.asList(entry.getValue()));

}

return result;

}

}