/// <exception cref="System.IO.IOException"/>
internal static IList <XAttr> SetINodeXAttrs(FSDirectory fsd, IList <XAttr> existingXAttrs
, IList <XAttr> toSet, EnumSet <XAttrSetFlag> flag)
{
// Check for duplicate XAttrs in toSet
// We need to use a custom comparator, so using a HashSet is not suitable
for (int i = 0; i < toSet.Count; i++)
{
for (int j = i + 1; j < toSet.Count; j++)
{
if (toSet[i].EqualsIgnoreValue(toSet[j]))
{
throw new IOException("Cannot specify the same XAttr to be set " + "more than once"
);
}
}
}
// Count the current number of user-visible XAttrs for limit checking
int userVisibleXAttrsNum = 0;
// Number of user visible xAttrs
// The XAttr list is copied to an exactly-sized array when it's stored,
// so there's no need to size it precisely here.
int newSize = (existingXAttrs != null) ? existingXAttrs.Count : 0;
newSize += toSet.Count;
IList <XAttr> xAttrs = Lists.NewArrayListWithCapacity(newSize);
// Check if the XAttr already exists to validate with the provided flag
foreach (XAttr xAttr in toSet)
{
bool exist = false;
if (existingXAttrs != null)
{
foreach (XAttr a in existingXAttrs)
{
if (a.EqualsIgnoreValue(xAttr))
{
exist = true;
break;
}
}
}
XAttrSetFlag.Validate(xAttr.GetName(), exist, flag);
// add the new XAttr since it passed validation
xAttrs.AddItem(xAttr);
if (IsUserVisible(xAttr))
{
userVisibleXAttrsNum++;
}
}
// Add the existing xattrs back in, if they weren't already set
if (existingXAttrs != null)
{
foreach (XAttr existing in existingXAttrs)
{
bool alreadySet = false;
foreach (XAttr set in toSet)
{
if (set.EqualsIgnoreValue(existing))
{
alreadySet = true;
break;
}
}
if (!alreadySet)
{
xAttrs.AddItem(existing);
if (IsUserVisible(existing))
{
userVisibleXAttrsNum++;
}
}
}
}
if (userVisibleXAttrsNum > fsd.GetInodeXAttrsLimit())
{
throw new IOException("Cannot add additional XAttr to inode, " + "would exceed limit of "
+ fsd.GetInodeXAttrsLimit());
}
return(xAttrs);
}