/**
* Given a parent Path ID number and the child's path name look up the value in the cache.
*
* @param parentPathId The parent's path (directory) ID number.
* @param childPathName The name of the path within the parent's directory
* @return a PathNameCacheValue object containing the cache mapping, or null if the mapping isn't
* in the cache.
*/
public PathNameCacheValue get(int parentPathId, String childPathName) {
PathNameCacheKey key = new PathNameCacheKey(parentPathId, childPathName);
return map.get(key);
}
